./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.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/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:42:37,262 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:42:37,322 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:42:37,328 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:42:37,328 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:42:37,360 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:42:37,360 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:42:37,360 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:42:37,361 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:42:37,361 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:42:37,361 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:42:37,362 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:42:37,362 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:42:37,362 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:42:37,363 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:42:37,363 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:42:37,363 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:42:37,364 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:42:37,364 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:42:37,364 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:42:37,364 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:42:37,365 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:42:37,365 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:42:37,365 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:42:37,366 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:42:37,366 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:42:37,366 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:42:37,366 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:42:37,367 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:42:37,367 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:42:37,367 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:42:37,367 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:42:37,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:42:37,368 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:42:37,368 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:42:37,368 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:42:37,369 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:42:37,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:42:37,369 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:42:37,369 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:42:37,370 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:42:37,370 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:42:37,370 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:42:37,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:42:37,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:42:37,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:42:37,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:42:37,588 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:42:37,588 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:42:37,589 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 12:42:37,780 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:42:37,782 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:42:37,783 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 12:42:38,776 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:42:38,986 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:42:38,989 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 12:42:38,999 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0ed8a299/12c52b1f832f410cb837c84f15dc1c20/FLAG8f5c140ff [2024-06-14 12:42:39,358 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0ed8a299/12c52b1f832f410cb837c84f15dc1c20 [2024-06-14 12:42:39,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:42:39,360 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:42:39,362 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:42:39,362 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:42:39,366 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:42:39,367 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:42:37" (1/2) ... [2024-06-14 12:42:39,367 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f6dfa0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:39, skipping insertion in model container [2024-06-14 12:42:39,367 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:42:37" (1/2) ... [2024-06-14 12:42:39,368 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2b3c1911 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:39, skipping insertion in model container [2024-06-14 12:42:39,369 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:42:39" (2/2) ... [2024-06-14 12:42:39,369 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f6dfa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39, skipping insertion in model container [2024-06-14 12:42:39,369 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:42:39" (2/2) ... [2024-06-14 12:42:39,369 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:42:39,451 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:42:39,452 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) [2024-06-14 12:42:39,452 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) [2024-06-14 12:42:39,452 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) [2024-06-14 12:42:39,453 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:42:39,453 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-14 12:42:39,496 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:42:39,734 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:42:39,741 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:42:39,839 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:42:39,867 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:42:39,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39 WrapperNode [2024-06-14 12:42:39,869 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:42:39,870 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:42:39,870 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:42:39,870 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:42:39,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39" (1/1) ... [2024-06-14 12:42:39,902 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39" (1/1) ... [2024-06-14 12:42:39,932 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 166 [2024-06-14 12:42:39,933 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:42:39,933 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:42:39,933 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:42:39,934 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:42:39,941 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39" (1/1) ... [2024-06-14 12:42:39,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39" (1/1) ... [2024-06-14 12:42:39,944 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39" (1/1) ... [2024-06-14 12:42:39,964 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 12:42:39,966 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39" (1/1) ... [2024-06-14 12:42:39,966 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39" (1/1) ... [2024-06-14 12:42:39,975 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39" (1/1) ... [2024-06-14 12:42:39,976 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39" (1/1) ... [2024-06-14 12:42:39,978 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39" (1/1) ... [2024-06-14 12:42:39,979 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39" (1/1) ... [2024-06-14 12:42:39,981 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:42:39,982 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:42:39,982 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:42:39,982 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:42:39,983 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39" (1/1) ... [2024-06-14 12:42:39,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:42:39,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:42:40,021 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 12:42:40,043 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 12:42:40,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:42:40,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:42:40,057 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:42:40,057 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:42:40,057 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:42:40,058 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:42:40,058 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:42:40,058 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:42:40,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:42:40,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:42:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:42:40,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:42:40,060 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 12:42:40,183 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:42:40,185 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:42:40,491 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:42:40,491 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:42:40,644 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:42:40,645 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:42:40,645 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:42:40 BoogieIcfgContainer [2024-06-14 12:42:40,645 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:42:40,647 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:42:40,648 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:42:40,650 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:42:40,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:42:37" (1/4) ... [2024-06-14 12:42:40,651 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3477e8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:42:40, skipping insertion in model container [2024-06-14 12:42:40,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:42:39" (2/4) ... [2024-06-14 12:42:40,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3477e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:42:40, skipping insertion in model container [2024-06-14 12:42:40,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:39" (3/4) ... [2024-06-14 12:42:40,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3477e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:42:40, skipping insertion in model container [2024-06-14 12:42:40,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:42:40" (4/4) ... [2024-06-14 12:42:40,653 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 12:42:40,665 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:42:40,666 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:42:40,666 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:42:40,710 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:42:40,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:42:40,759 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 12:42:40,760 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:42:40,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 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. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:42:40,762 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:42:40,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 12:42:40,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:42:40,780 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;@7aae8c53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:42:40,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:42:40,784 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:42:40,784 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:42:40,784 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:42:40,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:40,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:42:40,785 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 12:42:40,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:40,789 INFO L85 PathProgramCache]: Analyzing trace with hash -379355684, now seen corresponding path program 1 times [2024-06-14 12:42:40,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:40,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14150141] [2024-06-14 12:42:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:40,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:41,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:41,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14150141] [2024-06-14 12:42:41,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14150141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:41,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:41,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:42:41,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465863568] [2024-06-14 12:42:41,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:41,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:42:41,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:41,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:42:41,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:42:42,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:42:42,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:42,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:42,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:42:42,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:42,275 INFO L124 PetriNetUnfolderBase]: 1152/1771 cut-off events. [2024-06-14 12:42:42,276 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 12:42:42,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3590 conditions, 1771 events. 1152/1771 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8398 event pairs, 785 based on Foata normal form. 1/1732 useless extension candidates. Maximal degree in co-relation 3575. Up to 1732 conditions per place. [2024-06-14 12:42:42,289 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 33 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 12:42:42,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 173 flow [2024-06-14 12:42:42,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:42:42,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:42:42,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-14 12:42:42,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 12:42:42,300 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 70 transitions. [2024-06-14 12:42:42,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 173 flow [2024-06-14 12:42:42,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:42:42,303 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 12:42:42,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 12:42:42,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 12:42:42,308 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 12:42:42,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:42,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:42,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:42,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:42:42,308 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 12:42:42,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:42,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1325232245, now seen corresponding path program 1 times [2024-06-14 12:42:42,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:42,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654283045] [2024-06-14 12:42:42,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:42,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:42,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:42,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654283045] [2024-06-14 12:42:42,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654283045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:42,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:42,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:42:42,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880967218] [2024-06-14 12:42:42,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:42,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:42:42,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:42,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:42:42,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:42:42,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:42:42,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:42,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:42,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:42:42,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:43,266 INFO L124 PetriNetUnfolderBase]: 1389/2125 cut-off events. [2024-06-14 12:42:43,266 INFO L125 PetriNetUnfolderBase]: For 400/404 co-relation queries the response was YES. [2024-06-14 12:42:43,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4861 conditions, 2125 events. 1389/2125 cut-off events. For 400/404 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9956 event pairs, 621 based on Foata normal form. 10/2130 useless extension candidates. Maximal degree in co-relation 4846. Up to 2033 conditions per place. [2024-06-14 12:42:43,274 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 43 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 12:42:43,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 250 flow [2024-06-14 12:42:43,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:42:43,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:42:43,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-14 12:42:43,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 12:42:43,276 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 89 transitions. [2024-06-14 12:42:43,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 250 flow [2024-06-14 12:42:43,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:42:43,278 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-14 12:42:43,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-14 12:42:43,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-14 12:42:43,279 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-14 12:42:43,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:43,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:43,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:43,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:42:43,280 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 12:42:43,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:43,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2025860968, now seen corresponding path program 1 times [2024-06-14 12:42:43,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:43,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277165948] [2024-06-14 12:42:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:43,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:44,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:44,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277165948] [2024-06-14 12:42:44,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277165948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:44,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:44,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:42:44,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577814682] [2024-06-14 12:42:44,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:44,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:42:44,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:44,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:42:44,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:42:44,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:42:44,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:44,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:44,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:42:44,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:44,828 INFO L124 PetriNetUnfolderBase]: 1380/2108 cut-off events. [2024-06-14 12:42:44,828 INFO L125 PetriNetUnfolderBase]: For 1134/1142 co-relation queries the response was YES. [2024-06-14 12:42:44,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5350 conditions, 2108 events. 1380/2108 cut-off events. For 1134/1142 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9838 event pairs, 481 based on Foata normal form. 14/2115 useless extension candidates. Maximal degree in co-relation 5333. Up to 1988 conditions per place. [2024-06-14 12:42:44,837 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2024-06-14 12:42:44,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 306 flow [2024-06-14 12:42:44,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:42:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:42:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-14 12:42:44,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-14 12:42:44,839 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 104 transitions. [2024-06-14 12:42:44,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 306 flow [2024-06-14 12:42:44,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 292 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:42:44,841 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 157 flow [2024-06-14 12:42:44,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-06-14 12:42:44,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-14 12:42:44,842 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 157 flow [2024-06-14 12:42:44,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:44,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:44,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:44,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:42:44,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:44,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:44,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1529658022, now seen corresponding path program 1 times [2024-06-14 12:42:44,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:44,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111607326] [2024-06-14 12:42:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:44,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:45,479 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 12:42:45,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:45,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111607326] [2024-06-14 12:42:45,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111607326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:45,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:45,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:42:45,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270901905] [2024-06-14 12:42:45,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:45,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:42:45,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:42:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:42:45,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:42:45,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 157 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:45,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:45,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:42:45,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:45,813 INFO L124 PetriNetUnfolderBase]: 1126/1735 cut-off events. [2024-06-14 12:42:45,813 INFO L125 PetriNetUnfolderBase]: For 1662/1662 co-relation queries the response was YES. [2024-06-14 12:42:45,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4773 conditions, 1735 events. 1126/1735 cut-off events. For 1662/1662 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8111 event pairs, 594 based on Foata normal form. 2/1735 useless extension candidates. Maximal degree in co-relation 4755. Up to 1683 conditions per place. [2024-06-14 12:42:45,822 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-14 12:42:45,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 295 flow [2024-06-14 12:42:45,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:42:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:42:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-14 12:42:45,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:42:45,823 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 157 flow. Second operand 5 states and 90 transitions. [2024-06-14 12:42:45,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 295 flow [2024-06-14 12:42:45,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 272 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:42:45,826 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 178 flow [2024-06-14 12:42:45,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-14 12:42:45,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-14 12:42:45,827 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 178 flow [2024-06-14 12:42:45,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:45,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:45,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:45,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:42:45,827 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 12:42:45,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:45,828 INFO L85 PathProgramCache]: Analyzing trace with hash 182802704, now seen corresponding path program 1 times [2024-06-14 12:42:45,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:45,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335568073] [2024-06-14 12:42:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:45,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:46,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:46,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335568073] [2024-06-14 12:42:46,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335568073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:46,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:46,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:42:46,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43818427] [2024-06-14 12:42:46,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:46,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:42:46,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:46,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:42:46,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:42:46,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:42:46,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 178 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 12:42:46,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:46,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:42:46,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:47,121 INFO L124 PetriNetUnfolderBase]: 1116/1717 cut-off events. [2024-06-14 12:42:47,121 INFO L125 PetriNetUnfolderBase]: For 2620/2620 co-relation queries the response was YES. [2024-06-14 12:42:47,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5107 conditions, 1717 events. 1116/1717 cut-off events. For 2620/2620 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8086 event pairs, 564 based on Foata normal form. 4/1719 useless extension candidates. Maximal degree in co-relation 5087. Up to 1651 conditions per place. [2024-06-14 12:42:47,130 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 45 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2024-06-14 12:42:47,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 348 flow [2024-06-14 12:42:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:42:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:42:47,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 12:42:47,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-14 12:42:47,133 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 178 flow. Second operand 6 states and 107 transitions. [2024-06-14 12:42:47,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 348 flow [2024-06-14 12:42:47,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 328 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:42:47,139 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 212 flow [2024-06-14 12:42:47,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-14 12:42:47,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-14 12:42:47,141 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 212 flow [2024-06-14 12:42:47,142 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 12:42:47,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:47,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:47,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:42:47,145 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 12:42:47,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:47,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1461393469, now seen corresponding path program 1 times [2024-06-14 12:42:47,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:47,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531160697] [2024-06-14 12:42:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:47,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:47,880 INFO 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 12:42:47,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:47,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531160697] [2024-06-14 12:42:47,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531160697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:47,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:47,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:42:47,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719135569] [2024-06-14 12:42:47,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:47,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:42:47,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:47,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:42:47,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:42:47,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:47,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 212 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 12:42:47,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:47,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:47,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:48,307 INFO L124 PetriNetUnfolderBase]: 1372/2099 cut-off events. [2024-06-14 12:42:48,307 INFO L125 PetriNetUnfolderBase]: For 4211/4223 co-relation queries the response was YES. [2024-06-14 12:42:48,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6651 conditions, 2099 events. 1372/2099 cut-off events. For 4211/4223 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9785 event pairs, 514 based on Foata normal form. 16/2114 useless extension candidates. Maximal degree in co-relation 6630. Up to 1990 conditions per place. [2024-06-14 12:42:48,318 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2024-06-14 12:42:48,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 426 flow [2024-06-14 12:42:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:42:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:42:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 12:42:48,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-14 12:42:48,319 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 212 flow. Second operand 6 states and 107 transitions. [2024-06-14 12:42:48,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 426 flow [2024-06-14 12:42:48,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 71 transitions, 396 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:42:48,323 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 260 flow [2024-06-14 12:42:48,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-14 12:42:48,324 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-14 12:42:48,324 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 260 flow [2024-06-14 12:42:48,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 12:42:48,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:48,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:48,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:42:48,324 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 12:42:48,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:48,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1453229929, now seen corresponding path program 2 times [2024-06-14 12:42:48,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:48,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282444338] [2024-06-14 12:42:48,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:48,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:49,047 INFO 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 12:42:49,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:49,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282444338] [2024-06-14 12:42:49,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282444338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:49,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:49,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:42:49,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475783601] [2024-06-14 12:42:49,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:49,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:42:49,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:49,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:42:49,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:42:49,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:49,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 260 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 12:42:49,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:49,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:49,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:49,431 INFO L124 PetriNetUnfolderBase]: 1378/2114 cut-off events. [2024-06-14 12:42:49,431 INFO L125 PetriNetUnfolderBase]: For 5943/5953 co-relation queries the response was YES. [2024-06-14 12:42:49,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7264 conditions, 2114 events. 1378/2114 cut-off events. For 5943/5953 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9904 event pairs, 503 based on Foata normal form. 10/2123 useless extension candidates. Maximal degree in co-relation 7241. Up to 1947 conditions per place. [2024-06-14 12:42:49,445 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2024-06-14 12:42:49,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 78 transitions, 538 flow [2024-06-14 12:42:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:42:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:42:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 12:42:49,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 12:42:49,447 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 260 flow. Second operand 6 states and 110 transitions. [2024-06-14 12:42:49,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 78 transitions, 538 flow [2024-06-14 12:42:49,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 512 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-14 12:42:49,452 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 342 flow [2024-06-14 12:42:49,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=342, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-14 12:42:49,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-14 12:42:49,453 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 342 flow [2024-06-14 12:42:49,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 12:42:49,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:49,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:49,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:42:49,454 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:49,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:49,454 INFO L85 PathProgramCache]: Analyzing trace with hash 253339214, now seen corresponding path program 1 times [2024-06-14 12:42:49,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:49,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251663067] [2024-06-14 12:42:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:49,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:50,064 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 12:42:50,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:50,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251663067] [2024-06-14 12:42:50,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251663067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:50,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:50,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:42:50,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599806312] [2024-06-14 12:42:50,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:50,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:42:50,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:50,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:42:50,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:42:50,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:42:50,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 342 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:50,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:50,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:42:50,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:50,715 INFO L124 PetriNetUnfolderBase]: 1613/2418 cut-off events. [2024-06-14 12:42:50,716 INFO L125 PetriNetUnfolderBase]: For 8648/8648 co-relation queries the response was YES. [2024-06-14 12:42:50,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8820 conditions, 2418 events. 1613/2418 cut-off events. For 8648/8648 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10933 event pairs, 607 based on Foata normal form. 2/2419 useless extension candidates. Maximal degree in co-relation 8795. Up to 2399 conditions per place. [2024-06-14 12:42:50,733 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 61 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-06-14 12:42:50,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 532 flow [2024-06-14 12:42:50,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:42:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:42:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-06-14 12:42:50,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853658536585366 [2024-06-14 12:42:50,738 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 342 flow. Second operand 5 states and 79 transitions. [2024-06-14 12:42:50,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 532 flow [2024-06-14 12:42:50,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 500 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 12:42:50,744 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 376 flow [2024-06-14 12:42:50,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=376, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-06-14 12:42:50,746 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-14 12:42:50,746 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 376 flow [2024-06-14 12:42:50,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:50,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:50,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:50,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:42:50,747 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 12:42:50,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:50,747 INFO L85 PathProgramCache]: Analyzing trace with hash -457820444, now seen corresponding path program 1 times [2024-06-14 12:42:50,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:50,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815023720] [2024-06-14 12:42:50,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:50,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:51,666 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 12:42:51,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:51,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815023720] [2024-06-14 12:42:51,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815023720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:51,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:51,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:42:51,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620075708] [2024-06-14 12:42:51,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:51,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:42:51,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:51,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:42:51,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:42:51,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:51,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 376 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 12:42:51,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:51,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:51,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:52,164 INFO L124 PetriNetUnfolderBase]: 1367/2094 cut-off events. [2024-06-14 12:42:52,165 INFO L125 PetriNetUnfolderBase]: For 8407/8417 co-relation queries the response was YES. [2024-06-14 12:42:52,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8100 conditions, 2094 events. 1367/2094 cut-off events. For 8407/8417 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9815 event pairs, 490 based on Foata normal form. 12/2105 useless extension candidates. Maximal degree in co-relation 8072. Up to 1975 conditions per place. [2024-06-14 12:42:52,174 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 60 selfloop transitions, 18 changer transitions 0/82 dead transitions. [2024-06-14 12:42:52,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 582 flow [2024-06-14 12:42:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:42:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:42:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 12:42:52,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-14 12:42:52,175 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 376 flow. Second operand 6 states and 107 transitions. [2024-06-14 12:42:52,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 582 flow [2024-06-14 12:42:52,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 564 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-14 12:42:52,181 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 406 flow [2024-06-14 12:42:52,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=406, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2024-06-14 12:42:52,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-14 12:42:52,182 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 406 flow [2024-06-14 12:42:52,182 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 12:42:52,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:52,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:52,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:42:52,183 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 12:42:52,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:52,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1941443425, now seen corresponding path program 1 times [2024-06-14 12:42:52,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:52,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94670543] [2024-06-14 12:42:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:52,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:53,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:53,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94670543] [2024-06-14 12:42:53,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94670543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:53,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:53,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:42:53,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453234816] [2024-06-14 12:42:53,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:53,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:42:53,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:53,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:42:53,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:42:53,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:53,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 406 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 12:42:53,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:53,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:53,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:53,577 INFO L124 PetriNetUnfolderBase]: 1389/2130 cut-off events. [2024-06-14 12:42:53,577 INFO L125 PetriNetUnfolderBase]: For 10290/10304 co-relation queries the response was YES. [2024-06-14 12:42:53,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8490 conditions, 2130 events. 1389/2130 cut-off events. For 10290/10304 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10058 event pairs, 485 based on Foata normal form. 18/2147 useless extension candidates. Maximal degree in co-relation 8459. Up to 1993 conditions per place. [2024-06-14 12:42:53,589 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 67 selfloop transitions, 19 changer transitions 0/90 dead transitions. [2024-06-14 12:42:53,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 668 flow [2024-06-14 12:42:53,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:42:53,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:42:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:42:53,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:42:53,591 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 406 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:42:53,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 668 flow [2024-06-14 12:42:53,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 90 transitions, 623 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 12:42:53,603 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 439 flow [2024-06-14 12:42:53,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-06-14 12:42:53,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-14 12:42:53,604 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 439 flow [2024-06-14 12:42:53,604 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 12:42:53,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:53,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:53,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:42:53,604 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 12:42:53,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:53,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1945168075, now seen corresponding path program 2 times [2024-06-14 12:42:53,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:53,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230594529] [2024-06-14 12:42:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:53,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:54,506 INFO 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 12:42:54,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:54,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230594529] [2024-06-14 12:42:54,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230594529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:54,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:54,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:42:54,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230464413] [2024-06-14 12:42:54,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:54,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:42:54,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:54,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:42:54,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:42:54,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:54,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 439 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 12:42:54,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:54,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:54,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:55,062 INFO L124 PetriNetUnfolderBase]: 1465/2244 cut-off events. [2024-06-14 12:42:55,062 INFO L125 PetriNetUnfolderBase]: For 13129/13139 co-relation queries the response was YES. [2024-06-14 12:42:55,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9475 conditions, 2244 events. 1465/2244 cut-off events. For 13129/13139 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10648 event pairs, 456 based on Foata normal form. 18/2261 useless extension candidates. Maximal degree in co-relation 9443. Up to 2040 conditions per place. [2024-06-14 12:42:55,075 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 75 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-06-14 12:42:55,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 807 flow [2024-06-14 12:42:55,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:42:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:42:55,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:42:55,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:42:55,076 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 439 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:42:55,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 807 flow [2024-06-14 12:42:55,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 99 transitions, 753 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:42:55,085 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 510 flow [2024-06-14 12:42:55,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=510, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2024-06-14 12:42:55,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-14 12:42:55,086 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 510 flow [2024-06-14 12:42:55,086 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 12:42:55,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:55,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:55,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:42:55,087 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 12:42:55,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:55,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1945162495, now seen corresponding path program 3 times [2024-06-14 12:42:55,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:55,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068650630] [2024-06-14 12:42:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:55,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:56,165 INFO 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 12:42:56,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:56,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068650630] [2024-06-14 12:42:56,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068650630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:56,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:56,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:42:56,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870046188] [2024-06-14 12:42:56,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:56,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:42:56,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:56,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:42:56,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:42:56,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:56,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 510 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 12:42:56,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:56,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:56,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:56,668 INFO L124 PetriNetUnfolderBase]: 1471/2260 cut-off events. [2024-06-14 12:42:56,669 INFO L125 PetriNetUnfolderBase]: For 15989/15999 co-relation queries the response was YES. [2024-06-14 12:42:56,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10135 conditions, 2260 events. 1471/2260 cut-off events. For 15989/15999 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10755 event pairs, 499 based on Foata normal form. 10/2269 useless extension candidates. Maximal degree in co-relation 10102. Up to 2062 conditions per place. [2024-06-14 12:42:56,681 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 69 selfloop transitions, 26 changer transitions 0/99 dead transitions. [2024-06-14 12:42:56,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 802 flow [2024-06-14 12:42:56,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:42:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:42:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:42:56,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 12:42:56,683 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 510 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:42:56,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 802 flow [2024-06-14 12:42:56,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 757 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 12:42:56,700 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 569 flow [2024-06-14 12:42:56,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=569, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-06-14 12:42:56,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-14 12:42:56,700 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 569 flow [2024-06-14 12:42:56,701 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 12:42:56,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:56,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:56,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:42:56,701 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 12:42:56,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:56,702 INFO L85 PathProgramCache]: Analyzing trace with hash -142441614, now seen corresponding path program 1 times [2024-06-14 12:42:56,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:56,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743353247] [2024-06-14 12:42:56,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:56,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:58,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:58,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743353247] [2024-06-14 12:42:58,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743353247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:58,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:58,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:58,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051642139] [2024-06-14 12:42:58,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:58,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:58,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:58,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:58,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:58,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:58,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 569 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 12:42:58,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:58,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:58,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:58,621 INFO L124 PetriNetUnfolderBase]: 1636/2494 cut-off events. [2024-06-14 12:42:58,622 INFO L125 PetriNetUnfolderBase]: For 21176/21176 co-relation queries the response was YES. [2024-06-14 12:42:58,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11628 conditions, 2494 events. 1636/2494 cut-off events. For 21176/21176 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11504 event pairs, 533 based on Foata normal form. 8/2501 useless extension candidates. Maximal degree in co-relation 11593. Up to 2363 conditions per place. [2024-06-14 12:42:58,635 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 84 selfloop transitions, 23 changer transitions 0/113 dead transitions. [2024-06-14 12:42:58,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 113 transitions, 929 flow [2024-06-14 12:42:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:42:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:42:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-14 12:42:58,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 12:42:58,637 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 569 flow. Second operand 10 states and 155 transitions. [2024-06-14 12:42:58,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 113 transitions, 929 flow [2024-06-14 12:42:58,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 113 transitions, 849 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:42:58,652 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 641 flow [2024-06-14 12:42:58,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=641, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-06-14 12:42:58,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-14 12:42:58,653 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 641 flow [2024-06-14 12:42:58,653 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 12:42:58,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:58,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:58,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:42:58,653 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 12:42:58,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:58,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1307591742, now seen corresponding path program 1 times [2024-06-14 12:42:58,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:58,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916866278] [2024-06-14 12:42:58,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:58,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:59,617 INFO 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 12:42:59,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:59,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916866278] [2024-06-14 12:42:59,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916866278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:59,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:59,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:59,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869098576] [2024-06-14 12:42:59,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:59,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:59,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:59,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:59,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:59,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:59,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 641 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 12:42:59,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:59,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:59,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:00,239 INFO L124 PetriNetUnfolderBase]: 1640/2506 cut-off events. [2024-06-14 12:43:00,239 INFO L125 PetriNetUnfolderBase]: For 23367/23371 co-relation queries the response was YES. [2024-06-14 12:43:00,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12144 conditions, 2506 events. 1640/2506 cut-off events. For 23367/23371 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11930 event pairs, 375 based on Foata normal form. 8/2508 useless extension candidates. Maximal degree in co-relation 12105. Up to 2344 conditions per place. [2024-06-14 12:43:00,253 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 89 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2024-06-14 12:43:00,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 111 transitions, 945 flow [2024-06-14 12:43:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:43:00,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-14 12:43:00,254 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 641 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:43:00,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 111 transitions, 945 flow [2024-06-14 12:43:00,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 876 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:43:00,271 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 649 flow [2024-06-14 12:43:00,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=649, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2024-06-14 12:43:00,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-14 12:43:00,272 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 649 flow [2024-06-14 12:43:00,273 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 12:43:00,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:00,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:00,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:43:00,274 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 12:43:00,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:00,274 INFO L85 PathProgramCache]: Analyzing trace with hash 52403424, now seen corresponding path program 1 times [2024-06-14 12:43:00,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:00,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894808223] [2024-06-14 12:43:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:00,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:01,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:01,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894808223] [2024-06-14 12:43:01,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894808223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:01,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:01,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:01,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605733578] [2024-06-14 12:43:01,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:01,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:01,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:01,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:01,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:01,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:01,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 649 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 12:43:01,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:01,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:01,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:02,078 INFO L124 PetriNetUnfolderBase]: 1635/2504 cut-off events. [2024-06-14 12:43:02,078 INFO L125 PetriNetUnfolderBase]: For 25727/25731 co-relation queries the response was YES. [2024-06-14 12:43:02,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12283 conditions, 2504 events. 1635/2504 cut-off events. For 25727/25731 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11977 event pairs, 460 based on Foata normal form. 6/2509 useless extension candidates. Maximal degree in co-relation 12243. Up to 2331 conditions per place. [2024-06-14 12:43:02,092 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 84 selfloop transitions, 25 changer transitions 0/114 dead transitions. [2024-06-14 12:43:02,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 981 flow [2024-06-14 12:43:02,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:43:02,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:43:02,094 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 649 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:43:02,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 981 flow [2024-06-14 12:43:02,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 114 transitions, 922 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:43:02,110 INFO L231 Difference]: Finished difference. Result has 88 places, 91 transitions, 708 flow [2024-06-14 12:43:02,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=708, PETRI_PLACES=88, PETRI_TRANSITIONS=91} [2024-06-14 12:43:02,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-14 12:43:02,111 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 708 flow [2024-06-14 12:43:02,111 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 12:43:02,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:02,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:02,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:43:02,111 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 12:43:02,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:02,112 INFO L85 PathProgramCache]: Analyzing trace with hash -694156812, now seen corresponding path program 2 times [2024-06-14 12:43:02,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:02,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366844941] [2024-06-14 12:43:02,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:02,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:03,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:03,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366844941] [2024-06-14 12:43:03,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366844941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:03,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:03,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:03,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373107821] [2024-06-14 12:43:03,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:03,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:03,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:03,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:03,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:03,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:03,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 91 transitions, 708 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 12:43:03,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:03,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:03,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:03,866 INFO L124 PetriNetUnfolderBase]: 1652/2531 cut-off events. [2024-06-14 12:43:03,866 INFO L125 PetriNetUnfolderBase]: For 30463/30467 co-relation queries the response was YES. [2024-06-14 12:43:03,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12924 conditions, 2531 events. 1652/2531 cut-off events. For 30463/30467 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12141 event pairs, 460 based on Foata normal form. 8/2538 useless extension candidates. Maximal degree in co-relation 12883. Up to 2367 conditions per place. [2024-06-14 12:43:03,881 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 90 selfloop transitions, 21 changer transitions 0/116 dead transitions. [2024-06-14 12:43:03,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 116 transitions, 1030 flow [2024-06-14 12:43:03,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:43:03,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-14 12:43:03,893 INFO L175 Difference]: Start difference. First operand has 88 places, 91 transitions, 708 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:43:03,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 116 transitions, 1030 flow [2024-06-14 12:43:03,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 116 transitions, 950 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:43:03,914 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 720 flow [2024-06-14 12:43:03,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=720, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2024-06-14 12:43:03,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-14 12:43:03,915 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 720 flow [2024-06-14 12:43:03,915 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 12:43:03,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:03,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:03,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:43:03,916 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:03,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:03,916 INFO L85 PathProgramCache]: Analyzing trace with hash -689572842, now seen corresponding path program 3 times [2024-06-14 12:43:03,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:03,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88100064] [2024-06-14 12:43:03,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:03,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:04,954 INFO 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 12:43:04,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:04,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88100064] [2024-06-14 12:43:04,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88100064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:04,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:04,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:04,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404708985] [2024-06-14 12:43:04,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:04,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:04,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:04,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:04,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:05,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:05,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 720 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 12:43:05,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:05,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:05,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:05,536 INFO L124 PetriNetUnfolderBase]: 1644/2521 cut-off events. [2024-06-14 12:43:05,537 INFO L125 PetriNetUnfolderBase]: For 33832/33836 co-relation queries the response was YES. [2024-06-14 12:43:05,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13079 conditions, 2521 events. 1644/2521 cut-off events. For 33832/33836 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12050 event pairs, 465 based on Foata normal form. 8/2528 useless extension candidates. Maximal degree in co-relation 13037. Up to 2319 conditions per place. [2024-06-14 12:43:05,551 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 88 selfloop transitions, 25 changer transitions 0/118 dead transitions. [2024-06-14 12:43:05,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 118 transitions, 1052 flow [2024-06-14 12:43:05,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:43:05,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:43:05,554 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 720 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:43:05,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 118 transitions, 1052 flow [2024-06-14 12:43:05,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 118 transitions, 980 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:43:05,572 INFO L231 Difference]: Finished difference. Result has 92 places, 95 transitions, 751 flow [2024-06-14 12:43:05,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=751, PETRI_PLACES=92, PETRI_TRANSITIONS=95} [2024-06-14 12:43:05,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-14 12:43:05,573 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 95 transitions, 751 flow [2024-06-14 12:43:05,573 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 12:43:05,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:05,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:05,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:43:05,574 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:05,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:05,574 INFO L85 PathProgramCache]: Analyzing trace with hash -15812017, now seen corresponding path program 1 times [2024-06-14 12:43:05,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:05,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726800243] [2024-06-14 12:43:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:05,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:06,115 INFO 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 12:43:06,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726800243] [2024-06-14 12:43:06,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726800243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:06,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:06,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:43:06,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958426237] [2024-06-14 12:43:06,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:06,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:43:06,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:06,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:43:06,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:43:06,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:06,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 95 transitions, 751 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:06,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:06,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:06,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:06,756 INFO L124 PetriNetUnfolderBase]: 1772/2655 cut-off events. [2024-06-14 12:43:06,756 INFO L125 PetriNetUnfolderBase]: For 37942/37946 co-relation queries the response was YES. [2024-06-14 12:43:06,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13779 conditions, 2655 events. 1772/2655 cut-off events. For 37942/37946 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12096 event pairs, 512 based on Foata normal form. 6/2660 useless extension candidates. Maximal degree in co-relation 13736. Up to 2613 conditions per place. [2024-06-14 12:43:06,770 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 89 selfloop transitions, 14 changer transitions 0/106 dead transitions. [2024-06-14 12:43:06,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 106 transitions, 1001 flow [2024-06-14 12:43:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:43:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:43:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-14 12:43:06,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-14 12:43:06,772 INFO L175 Difference]: Start difference. First operand has 92 places, 95 transitions, 751 flow. Second operand 5 states and 81 transitions. [2024-06-14 12:43:06,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 106 transitions, 1001 flow [2024-06-14 12:43:06,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 106 transitions, 916 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:43:06,794 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 734 flow [2024-06-14 12:43:06,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=734, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2024-06-14 12:43:06,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-14 12:43:06,795 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 734 flow [2024-06-14 12:43:06,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:06,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:06,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:06,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:43:06,796 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:06,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1354133587, now seen corresponding path program 2 times [2024-06-14 12:43:06,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:06,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123642172] [2024-06-14 12:43:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:06,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:07,348 INFO 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 12:43:07,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:07,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123642172] [2024-06-14 12:43:07,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123642172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:07,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:07,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:43:07,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566556409] [2024-06-14 12:43:07,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:07,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:43:07,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:07,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:43:07,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:43:07,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:07,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 734 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:07,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:07,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:07,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:07,887 INFO L124 PetriNetUnfolderBase]: 1766/2647 cut-off events. [2024-06-14 12:43:07,887 INFO L125 PetriNetUnfolderBase]: For 39764/39768 co-relation queries the response was YES. [2024-06-14 12:43:07,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14005 conditions, 2647 events. 1766/2647 cut-off events. For 39764/39768 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12034 event pairs, 512 based on Foata normal form. 6/2652 useless extension candidates. Maximal degree in co-relation 13961. Up to 2597 conditions per place. [2024-06-14 12:43:07,902 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 91 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2024-06-14 12:43:07,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 111 transitions, 1004 flow [2024-06-14 12:43:07,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:43:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:43:07,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-14 12:43:07,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 12:43:07,903 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 734 flow. Second operand 6 states and 93 transitions. [2024-06-14 12:43:07,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 111 transitions, 1004 flow [2024-06-14 12:43:07,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 111 transitions, 960 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 12:43:07,927 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 766 flow [2024-06-14 12:43:07,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=766, PETRI_PLACES=95, PETRI_TRANSITIONS=101} [2024-06-14 12:43:07,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-14 12:43:07,928 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 766 flow [2024-06-14 12:43:07,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:07,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:07,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:07,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:43:07,929 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:07,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:07,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1770827481, now seen corresponding path program 1 times [2024-06-14 12:43:07,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:07,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356755217] [2024-06-14 12:43:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:07,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:08,611 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 12:43:08,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:08,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356755217] [2024-06-14 12:43:08,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356755217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:08,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:08,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:43:08,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719676410] [2024-06-14 12:43:08,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:08,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:43:08,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:08,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:43:08,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:43:08,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:08,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 101 transitions, 766 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:08,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:08,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:08,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:09,040 INFO L124 PetriNetUnfolderBase]: 1784/2670 cut-off events. [2024-06-14 12:43:09,040 INFO L125 PetriNetUnfolderBase]: For 39473/39473 co-relation queries the response was YES. [2024-06-14 12:43:09,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14199 conditions, 2670 events. 1784/2670 cut-off events. For 39473/39473 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12082 event pairs, 505 based on Foata normal form. 2/2671 useless extension candidates. Maximal degree in co-relation 14154. Up to 2630 conditions per place. [2024-06-14 12:43:09,054 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 109 selfloop transitions, 15 changer transitions 0/127 dead transitions. [2024-06-14 12:43:09,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 127 transitions, 1173 flow [2024-06-14 12:43:09,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:43:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:43:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 12:43:09,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-14 12:43:09,056 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 766 flow. Second operand 6 states and 97 transitions. [2024-06-14 12:43:09,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 127 transitions, 1173 flow [2024-06-14 12:43:09,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 127 transitions, 1120 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:43:09,079 INFO L231 Difference]: Finished difference. Result has 99 places, 112 transitions, 862 flow [2024-06-14 12:43:09,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=862, PETRI_PLACES=99, PETRI_TRANSITIONS=112} [2024-06-14 12:43:09,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-14 12:43:09,079 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 112 transitions, 862 flow [2024-06-14 12:43:09,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:09,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:09,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:09,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:43:09,080 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:09,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:09,080 INFO L85 PathProgramCache]: Analyzing trace with hash -380855665, now seen corresponding path program 2 times [2024-06-14 12:43:09,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:09,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460944028] [2024-06-14 12:43:09,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:09,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:09,729 INFO 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 12:43:09,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:09,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460944028] [2024-06-14 12:43:09,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460944028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:09,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:09,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:43:09,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266314647] [2024-06-14 12:43:09,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:09,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:43:09,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:09,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:43:09,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:43:09,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:09,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 862 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:09,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:09,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:09,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:10,194 INFO L124 PetriNetUnfolderBase]: 1778/2662 cut-off events. [2024-06-14 12:43:10,194 INFO L125 PetriNetUnfolderBase]: For 42884/42884 co-relation queries the response was YES. [2024-06-14 12:43:10,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14756 conditions, 2662 events. 1778/2662 cut-off events. For 42884/42884 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12063 event pairs, 503 based on Foata normal form. 2/2663 useless extension candidates. Maximal degree in co-relation 14708. Up to 2640 conditions per place. [2024-06-14 12:43:10,210 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 109 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2024-06-14 12:43:10,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 123 transitions, 1138 flow [2024-06-14 12:43:10,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:43:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:43:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-14 12:43:10,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 12:43:10,212 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 862 flow. Second operand 6 states and 90 transitions. [2024-06-14 12:43:10,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 123 transitions, 1138 flow [2024-06-14 12:43:10,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 123 transitions, 1102 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-14 12:43:10,246 INFO L231 Difference]: Finished difference. Result has 104 places, 113 transitions, 863 flow [2024-06-14 12:43:10,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=863, PETRI_PLACES=104, PETRI_TRANSITIONS=113} [2024-06-14 12:43:10,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-14 12:43:10,246 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 113 transitions, 863 flow [2024-06-14 12:43:10,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:10,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:10,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:10,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:43:10,247 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:10,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:10,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1354118707, now seen corresponding path program 1 times [2024-06-14 12:43:10,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:10,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870542845] [2024-06-14 12:43:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:10,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:11,031 INFO 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 12:43:11,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:11,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870542845] [2024-06-14 12:43:11,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870542845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:11,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:11,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:43:11,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957437174] [2024-06-14 12:43:11,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:11,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:43:11,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:11,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:43:11,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:43:11,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:11,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 113 transitions, 863 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:11,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:11,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:11,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:11,529 INFO L124 PetriNetUnfolderBase]: 1773/2655 cut-off events. [2024-06-14 12:43:11,530 INFO L125 PetriNetUnfolderBase]: For 45729/45729 co-relation queries the response was YES. [2024-06-14 12:43:11,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14857 conditions, 2655 events. 1773/2655 cut-off events. For 45729/45729 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11926 event pairs, 502 based on Foata normal form. 2/2656 useless extension candidates. Maximal degree in co-relation 14806. Up to 2630 conditions per place. [2024-06-14 12:43:11,547 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 110 selfloop transitions, 12 changer transitions 0/125 dead transitions. [2024-06-14 12:43:11,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 125 transitions, 1152 flow [2024-06-14 12:43:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:43:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:43:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-14 12:43:11,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 12:43:11,548 INFO L175 Difference]: Start difference. First operand has 104 places, 113 transitions, 863 flow. Second operand 6 states and 90 transitions. [2024-06-14 12:43:11,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 125 transitions, 1152 flow [2024-06-14 12:43:11,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 125 transitions, 1128 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:43:11,578 INFO L231 Difference]: Finished difference. Result has 106 places, 115 transitions, 890 flow [2024-06-14 12:43:11,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=890, PETRI_PLACES=106, PETRI_TRANSITIONS=115} [2024-06-14 12:43:11,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-14 12:43:11,579 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 115 transitions, 890 flow [2024-06-14 12:43:11,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:11,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:11,579 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 12:43:11,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:43:11,579 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 12:43:11,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:11,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1880637630, now seen corresponding path program 1 times [2024-06-14 12:43:11,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:11,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371425130] [2024-06-14 12:43:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:11,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:12,793 INFO 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 12:43:12,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:12,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371425130] [2024-06-14 12:43:12,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371425130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:12,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:12,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:43:12,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095033868] [2024-06-14 12:43:12,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:12,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:43:12,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:43:12,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:43:12,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:12,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 115 transitions, 890 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 12:43:12,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:12,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:12,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:13,511 INFO L124 PetriNetUnfolderBase]: 1697/2596 cut-off events. [2024-06-14 12:43:13,511 INFO L125 PetriNetUnfolderBase]: For 51080/51084 co-relation queries the response was YES. [2024-06-14 12:43:13,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15283 conditions, 2596 events. 1697/2596 cut-off events. For 51080/51084 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12360 event pairs, 327 based on Foata normal form. 8/2598 useless extension candidates. Maximal degree in co-relation 15232. Up to 2411 conditions per place. [2024-06-14 12:43:13,528 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 19 changer transitions 0/145 dead transitions. [2024-06-14 12:43:13,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 145 transitions, 1286 flow [2024-06-14 12:43:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:43:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:43:13,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:43:13,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:43:13,529 INFO L175 Difference]: Start difference. First operand has 106 places, 115 transitions, 890 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:43:13,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 145 transitions, 1286 flow [2024-06-14 12:43:13,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 145 transitions, 1251 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 12:43:13,567 INFO L231 Difference]: Finished difference. Result has 110 places, 117 transitions, 948 flow [2024-06-14 12:43:13,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=948, PETRI_PLACES=110, PETRI_TRANSITIONS=117} [2024-06-14 12:43:13,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-14 12:43:13,569 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 117 transitions, 948 flow [2024-06-14 12:43:13,569 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 12:43:13,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:13,569 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 12:43:13,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:43:13,569 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 12:43:13,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:13,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1707623618, now seen corresponding path program 2 times [2024-06-14 12:43:13,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:13,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041423036] [2024-06-14 12:43:13,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:13,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:14,997 INFO 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 12:43:14,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:14,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041423036] [2024-06-14 12:43:14,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041423036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:14,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:14,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:43:14,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155972728] [2024-06-14 12:43:14,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:14,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:43:14,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:15,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:43:15,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:43:15,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:15,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 117 transitions, 948 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 12:43:15,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:15,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:15,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:15,722 INFO L124 PetriNetUnfolderBase]: 1689/2599 cut-off events. [2024-06-14 12:43:15,723 INFO L125 PetriNetUnfolderBase]: For 54259/54263 co-relation queries the response was YES. [2024-06-14 12:43:15,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15590 conditions, 2599 events. 1689/2599 cut-off events. For 54259/54263 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12538 event pairs, 428 based on Foata normal form. 8/2606 useless extension candidates. Maximal degree in co-relation 15538. Up to 2393 conditions per place. [2024-06-14 12:43:15,739 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 115 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-14 12:43:15,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 147 transitions, 1356 flow [2024-06-14 12:43:15,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:43:15,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:43:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:43:15,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:43:15,741 INFO L175 Difference]: Start difference. First operand has 110 places, 117 transitions, 948 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:43:15,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 147 transitions, 1356 flow [2024-06-14 12:43:15,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 147 transitions, 1281 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:15,786 INFO L231 Difference]: Finished difference. Result has 112 places, 119 transitions, 987 flow [2024-06-14 12:43:15,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=987, PETRI_PLACES=112, PETRI_TRANSITIONS=119} [2024-06-14 12:43:15,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-14 12:43:15,787 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 119 transitions, 987 flow [2024-06-14 12:43:15,787 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 12:43:15,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:15,787 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 12:43:15,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:43:15,787 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 12:43:15,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:15,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1624503008, now seen corresponding path program 3 times [2024-06-14 12:43:15,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:15,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060801417] [2024-06-14 12:43:15,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:15,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:17,041 INFO 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 12:43:17,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:17,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060801417] [2024-06-14 12:43:17,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060801417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:17,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:17,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:43:17,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053506523] [2024-06-14 12:43:17,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:17,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:43:17,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:17,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:43:17,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:43:17,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:17,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 119 transitions, 987 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 12:43:17,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:17,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:17,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:17,791 INFO L124 PetriNetUnfolderBase]: 1717/2651 cut-off events. [2024-06-14 12:43:17,791 INFO L125 PetriNetUnfolderBase]: For 62055/62059 co-relation queries the response was YES. [2024-06-14 12:43:17,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16342 conditions, 2651 events. 1717/2651 cut-off events. For 62055/62059 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12902 event pairs, 419 based on Foata normal form. 8/2658 useless extension candidates. Maximal degree in co-relation 16289. Up to 2454 conditions per place. [2024-06-14 12:43:17,807 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 23 changer transitions 0/149 dead transitions. [2024-06-14 12:43:17,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 149 transitions, 1401 flow [2024-06-14 12:43:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:43:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:43:17,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:43:17,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 12:43:17,808 INFO L175 Difference]: Start difference. First operand has 112 places, 119 transitions, 987 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:43:17,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 149 transitions, 1401 flow [2024-06-14 12:43:17,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 149 transitions, 1307 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:17,851 INFO L231 Difference]: Finished difference. Result has 114 places, 121 transitions, 1002 flow [2024-06-14 12:43:17,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1002, PETRI_PLACES=114, PETRI_TRANSITIONS=121} [2024-06-14 12:43:17,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-14 12:43:17,852 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 121 transitions, 1002 flow [2024-06-14 12:43:17,852 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 12:43:17,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:17,852 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 12:43:17,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:43:17,852 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:17,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:17,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1711348640, now seen corresponding path program 1 times [2024-06-14 12:43:17,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:17,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975663587] [2024-06-14 12:43:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:17,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:19,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:19,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975663587] [2024-06-14 12:43:19,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975663587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:19,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:19,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:43:19,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032138363] [2024-06-14 12:43:19,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:19,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:43:19,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:19,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:43:19,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:43:19,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:19,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 121 transitions, 1002 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:19,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:19,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:19,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:20,254 INFO L124 PetriNetUnfolderBase]: 1897/2852 cut-off events. [2024-06-14 12:43:20,255 INFO L125 PetriNetUnfolderBase]: For 67672/67680 co-relation queries the response was YES. [2024-06-14 12:43:20,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17105 conditions, 2852 events. 1897/2852 cut-off events. For 67672/67680 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13178 event pairs, 462 based on Foata normal form. 12/2863 useless extension candidates. Maximal degree in co-relation 17051. Up to 2704 conditions per place. [2024-06-14 12:43:20,271 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 132 selfloop transitions, 26 changer transitions 0/161 dead transitions. [2024-06-14 12:43:20,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 161 transitions, 1492 flow [2024-06-14 12:43:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:20,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:43:20,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 12:43:20,273 INFO L175 Difference]: Start difference. First operand has 114 places, 121 transitions, 1002 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:43:20,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 161 transitions, 1492 flow [2024-06-14 12:43:20,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 161 transitions, 1401 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:20,324 INFO L231 Difference]: Finished difference. Result has 118 places, 127 transitions, 1061 flow [2024-06-14 12:43:20,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1061, PETRI_PLACES=118, PETRI_TRANSITIONS=127} [2024-06-14 12:43:20,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-14 12:43:20,325 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 127 transitions, 1061 flow [2024-06-14 12:43:20,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:20,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:20,325 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 12:43:20,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:43:20,325 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 12:43:20,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:20,326 INFO L85 PathProgramCache]: Analyzing trace with hash 995971804, now seen corresponding path program 2 times [2024-06-14 12:43:20,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:20,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36988316] [2024-06-14 12:43:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:20,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:21,579 INFO 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 12:43:21,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:21,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36988316] [2024-06-14 12:43:21,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36988316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:21,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:21,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:43:21,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679941435] [2024-06-14 12:43:21,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:21,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:43:21,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:21,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:43:21,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:43:21,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:21,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 127 transitions, 1061 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:21,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:21,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:21,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:22,251 INFO L124 PetriNetUnfolderBase]: 1941/2915 cut-off events. [2024-06-14 12:43:22,251 INFO L125 PetriNetUnfolderBase]: For 71945/71949 co-relation queries the response was YES. [2024-06-14 12:43:22,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17816 conditions, 2915 events. 1941/2915 cut-off events. For 71945/71949 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13505 event pairs, 464 based on Foata normal form. 8/2922 useless extension candidates. Maximal degree in co-relation 17760. Up to 2664 conditions per place. [2024-06-14 12:43:22,271 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 132 selfloop transitions, 35 changer transitions 0/170 dead transitions. [2024-06-14 12:43:22,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 170 transitions, 1652 flow [2024-06-14 12:43:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:43:22,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-14 12:43:22,273 INFO L175 Difference]: Start difference. First operand has 118 places, 127 transitions, 1061 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:43:22,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 170 transitions, 1652 flow [2024-06-14 12:43:22,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 170 transitions, 1550 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:22,331 INFO L231 Difference]: Finished difference. Result has 123 places, 136 transitions, 1119 flow [2024-06-14 12:43:22,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1119, PETRI_PLACES=123, PETRI_TRANSITIONS=136} [2024-06-14 12:43:22,332 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-14 12:43:22,332 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 136 transitions, 1119 flow [2024-06-14 12:43:22,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:22,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:22,332 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 12:43:22,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:43:22,332 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 12:43:22,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:22,333 INFO L85 PathProgramCache]: Analyzing trace with hash 103595288, now seen corresponding path program 3 times [2024-06-14 12:43:22,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:22,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734844655] [2024-06-14 12:43:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:22,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:23,515 INFO 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 12:43:23,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:23,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734844655] [2024-06-14 12:43:23,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734844655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:23,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:23,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:43:23,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174887820] [2024-06-14 12:43:23,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:23,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:43:23,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:23,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:43:23,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:43:23,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:23,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 136 transitions, 1119 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:23,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:23,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:23,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:24,137 INFO L124 PetriNetUnfolderBase]: 1931/2901 cut-off events. [2024-06-14 12:43:24,137 INFO L125 PetriNetUnfolderBase]: For 75923/75927 co-relation queries the response was YES. [2024-06-14 12:43:24,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18033 conditions, 2901 events. 1931/2901 cut-off events. For 75923/75927 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13444 event pairs, 464 based on Foata normal form. 8/2908 useless extension candidates. Maximal degree in co-relation 17974. Up to 2656 conditions per place. [2024-06-14 12:43:24,158 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 128 selfloop transitions, 36 changer transitions 0/167 dead transitions. [2024-06-14 12:43:24,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 167 transitions, 1537 flow [2024-06-14 12:43:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:43:24,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 12:43:24,160 INFO L175 Difference]: Start difference. First operand has 123 places, 136 transitions, 1119 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:43:24,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 167 transitions, 1537 flow [2024-06-14 12:43:24,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 167 transitions, 1452 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 12:43:24,224 INFO L231 Difference]: Finished difference. Result has 128 places, 136 transitions, 1114 flow [2024-06-14 12:43:24,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1114, PETRI_PLACES=128, PETRI_TRANSITIONS=136} [2024-06-14 12:43:24,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-14 12:43:24,225 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 136 transitions, 1114 flow [2024-06-14 12:43:24,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:24,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:24,225 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 12:43:24,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:43:24,225 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 12:43:24,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:24,226 INFO L85 PathProgramCache]: Analyzing trace with hash 98082806, now seen corresponding path program 4 times [2024-06-14 12:43:24,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:24,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93684043] [2024-06-14 12:43:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:24,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:25,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:25,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93684043] [2024-06-14 12:43:25,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93684043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:25,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:25,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:43:25,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990315589] [2024-06-14 12:43:25,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:25,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:43:25,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:25,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:43:25,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:43:25,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:25,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 136 transitions, 1114 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 12:43:25,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:25,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:25,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:26,289 INFO L124 PetriNetUnfolderBase]: 1803/2780 cut-off events. [2024-06-14 12:43:26,289 INFO L125 PetriNetUnfolderBase]: For 82287/82296 co-relation queries the response was YES. [2024-06-14 12:43:26,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17929 conditions, 2780 events. 1803/2780 cut-off events. For 82287/82296 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13564 event pairs, 405 based on Foata normal form. 8/2780 useless extension candidates. Maximal degree in co-relation 17869. Up to 2538 conditions per place. [2024-06-14 12:43:26,311 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 128 selfloop transitions, 30 changer transitions 0/165 dead transitions. [2024-06-14 12:43:26,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 165 transitions, 1562 flow [2024-06-14 12:43:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:43:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:43:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:43:26,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 12:43:26,313 INFO L175 Difference]: Start difference. First operand has 128 places, 136 transitions, 1114 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:43:26,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 165 transitions, 1562 flow [2024-06-14 12:43:26,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 165 transitions, 1434 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-14 12:43:26,373 INFO L231 Difference]: Finished difference. Result has 126 places, 138 transitions, 1115 flow [2024-06-14 12:43:26,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1115, PETRI_PLACES=126, PETRI_TRANSITIONS=138} [2024-06-14 12:43:26,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-14 12:43:26,373 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 138 transitions, 1115 flow [2024-06-14 12:43:26,373 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 12:43:26,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:26,374 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 12:43:26,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:43:26,374 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 12:43:26,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:26,374 INFO L85 PathProgramCache]: Analyzing trace with hash 103589336, now seen corresponding path program 5 times [2024-06-14 12:43:26,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:26,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764545594] [2024-06-14 12:43:26,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:26,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:27,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:27,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764545594] [2024-06-14 12:43:27,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764545594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:27,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:27,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:43:27,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816035265] [2024-06-14 12:43:27,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:27,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:43:27,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:27,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:43:27,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:43:27,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:27,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 138 transitions, 1115 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 12:43:27,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:27,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:27,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:28,381 INFO L124 PetriNetUnfolderBase]: 1891/2932 cut-off events. [2024-06-14 12:43:28,381 INFO L125 PetriNetUnfolderBase]: For 91618/91627 co-relation queries the response was YES. [2024-06-14 12:43:28,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18508 conditions, 2932 events. 1891/2932 cut-off events. For 91618/91627 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14593 event pairs, 423 based on Foata normal form. 32/2956 useless extension candidates. Maximal degree in co-relation 18449. Up to 2491 conditions per place. [2024-06-14 12:43:28,401 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 126 selfloop transitions, 37 changer transitions 0/170 dead transitions. [2024-06-14 12:43:28,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 170 transitions, 1603 flow [2024-06-14 12:43:28,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:43:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:43:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:43:28,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-14 12:43:28,402 INFO L175 Difference]: Start difference. First operand has 126 places, 138 transitions, 1115 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:43:28,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 170 transitions, 1603 flow [2024-06-14 12:43:28,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 170 transitions, 1496 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:28,469 INFO L231 Difference]: Finished difference. Result has 128 places, 140 transitions, 1154 flow [2024-06-14 12:43:28,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1154, PETRI_PLACES=128, PETRI_TRANSITIONS=140} [2024-06-14 12:43:28,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-14 12:43:28,470 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 140 transitions, 1154 flow [2024-06-14 12:43:28,470 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 12:43:28,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:28,471 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 12:43:28,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:43:28,471 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 12:43:28,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:28,471 INFO L85 PathProgramCache]: Analyzing trace with hash 98079086, now seen corresponding path program 6 times [2024-06-14 12:43:28,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:28,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473774793] [2024-06-14 12:43:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:28,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:29,776 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 12:43:29,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:29,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473774793] [2024-06-14 12:43:29,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473774793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:29,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:29,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:43:29,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300995647] [2024-06-14 12:43:29,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:29,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:43:29,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:29,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:43:29,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:43:29,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:29,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 140 transitions, 1154 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 12:43:29,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:29,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:29,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:30,471 INFO L124 PetriNetUnfolderBase]: 1883/2922 cut-off events. [2024-06-14 12:43:30,471 INFO L125 PetriNetUnfolderBase]: For 89282/89291 co-relation queries the response was YES. [2024-06-14 12:43:30,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18645 conditions, 2922 events. 1883/2922 cut-off events. For 89282/89291 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14579 event pairs, 421 based on Foata normal form. 8/2922 useless extension candidates. Maximal degree in co-relation 18585. Up to 2670 conditions per place. [2024-06-14 12:43:30,492 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 133 selfloop transitions, 29 changer transitions 0/169 dead transitions. [2024-06-14 12:43:30,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 169 transitions, 1612 flow [2024-06-14 12:43:30,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:43:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:43:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:43:30,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:43:30,494 INFO L175 Difference]: Start difference. First operand has 128 places, 140 transitions, 1154 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:43:30,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 169 transitions, 1612 flow [2024-06-14 12:43:30,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 169 transitions, 1510 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:30,572 INFO L231 Difference]: Finished difference. Result has 130 places, 142 transitions, 1183 flow [2024-06-14 12:43:30,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1183, PETRI_PLACES=130, PETRI_TRANSITIONS=142} [2024-06-14 12:43:30,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-14 12:43:30,573 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 142 transitions, 1183 flow [2024-06-14 12:43:30,573 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 12:43:30,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:30,573 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 12:43:30,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:43:30,573 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 12:43:30,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:30,574 INFO L85 PathProgramCache]: Analyzing trace with hash 98232908, now seen corresponding path program 4 times [2024-06-14 12:43:30,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:30,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921173329] [2024-06-14 12:43:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:30,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:31,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:31,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921173329] [2024-06-14 12:43:31,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921173329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:31,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:31,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:43:31,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207904871] [2024-06-14 12:43:31,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:31,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:43:31,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:31,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:43:31,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:43:31,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:31,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 142 transitions, 1183 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:31,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:31,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:31,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:32,295 INFO L124 PetriNetUnfolderBase]: 2064/3121 cut-off events. [2024-06-14 12:43:32,295 INFO L125 PetriNetUnfolderBase]: For 90718/90722 co-relation queries the response was YES. [2024-06-14 12:43:32,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19074 conditions, 3121 events. 2064/3121 cut-off events. For 90718/90722 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14862 event pairs, 492 based on Foata normal form. 8/3128 useless extension candidates. Maximal degree in co-relation 19013. Up to 2922 conditions per place. [2024-06-14 12:43:32,318 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 143 selfloop transitions, 34 changer transitions 0/180 dead transitions. [2024-06-14 12:43:32,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 180 transitions, 1711 flow [2024-06-14 12:43:32,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:43:32,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-14 12:43:32,322 INFO L175 Difference]: Start difference. First operand has 130 places, 142 transitions, 1183 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:43:32,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 180 transitions, 1711 flow [2024-06-14 12:43:32,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 180 transitions, 1598 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:32,405 INFO L231 Difference]: Finished difference. Result has 134 places, 148 transitions, 1242 flow [2024-06-14 12:43:32,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1242, PETRI_PLACES=134, PETRI_TRANSITIONS=148} [2024-06-14 12:43:32,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-14 12:43:32,407 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 148 transitions, 1242 flow [2024-06-14 12:43:32,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:32,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:32,407 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 12:43:32,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:43:32,407 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:32,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:32,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1524860945, now seen corresponding path program 1 times [2024-06-14 12:43:32,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:32,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793569490] [2024-06-14 12:43:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:32,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:33,104 INFO 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 12:43:33,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:33,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793569490] [2024-06-14 12:43:33,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793569490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:33,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:33,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:33,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404199287] [2024-06-14 12:43:33,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:33,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:33,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:33,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:33,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:33,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:33,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 148 transitions, 1242 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:33,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:33,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:33,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:33,924 INFO L124 PetriNetUnfolderBase]: 2116/3191 cut-off events. [2024-06-14 12:43:33,924 INFO L125 PetriNetUnfolderBase]: For 97568/97572 co-relation queries the response was YES. [2024-06-14 12:43:33,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19982 conditions, 3191 events. 2116/3191 cut-off events. For 97568/97572 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15186 event pairs, 516 based on Foata normal form. 8/3198 useless extension candidates. Maximal degree in co-relation 19919. Up to 3079 conditions per place. [2024-06-14 12:43:33,948 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 146 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2024-06-14 12:43:33,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 176 transitions, 1792 flow [2024-06-14 12:43:33,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:43:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:43:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:43:33,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 12:43:33,950 INFO L175 Difference]: Start difference. First operand has 134 places, 148 transitions, 1242 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:43:33,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 176 transitions, 1792 flow [2024-06-14 12:43:34,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 176 transitions, 1664 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:34,050 INFO L231 Difference]: Finished difference. Result has 136 places, 154 transitions, 1261 flow [2024-06-14 12:43:34,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1261, PETRI_PLACES=136, PETRI_TRANSITIONS=154} [2024-06-14 12:43:34,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-14 12:43:34,051 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 154 transitions, 1261 flow [2024-06-14 12:43:34,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:34,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:34,051 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 12:43:34,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:43:34,051 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 12:43:34,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash -459785095, now seen corresponding path program 2 times [2024-06-14 12:43:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:34,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459402875] [2024-06-14 12:43:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:34,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:34,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:34,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459402875] [2024-06-14 12:43:34,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459402875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:34,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:34,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:34,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802375687] [2024-06-14 12:43:34,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:34,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:34,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:34,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:34,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:34,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:34,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 154 transitions, 1261 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:34,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:34,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:34,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:35,410 INFO L124 PetriNetUnfolderBase]: 2104/3177 cut-off events. [2024-06-14 12:43:35,411 INFO L125 PetriNetUnfolderBase]: For 101345/101349 co-relation queries the response was YES. [2024-06-14 12:43:35,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20045 conditions, 3177 events. 2104/3177 cut-off events. For 101345/101349 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15128 event pairs, 526 based on Foata normal form. 8/3184 useless extension candidates. Maximal degree in co-relation 19981. Up to 3071 conditions per place. [2024-06-14 12:43:35,438 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 139 selfloop transitions, 25 changer transitions 0/167 dead transitions. [2024-06-14 12:43:35,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 167 transitions, 1629 flow [2024-06-14 12:43:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:43:35,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:43:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-14 12:43:35,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 12:43:35,439 INFO L175 Difference]: Start difference. First operand has 136 places, 154 transitions, 1261 flow. Second operand 6 states and 98 transitions. [2024-06-14 12:43:35,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 167 transitions, 1629 flow [2024-06-14 12:43:35,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 167 transitions, 1535 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 12:43:35,535 INFO L231 Difference]: Finished difference. Result has 138 places, 154 transitions, 1223 flow [2024-06-14 12:43:35,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1223, PETRI_PLACES=138, PETRI_TRANSITIONS=154} [2024-06-14 12:43:35,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-14 12:43:35,536 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 154 transitions, 1223 flow [2024-06-14 12:43:35,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:35,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:35,537 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 12:43:35,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:43:35,537 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:35,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:35,537 INFO L85 PathProgramCache]: Analyzing trace with hash 971532375, now seen corresponding path program 3 times [2024-06-14 12:43:35,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:35,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152591463] [2024-06-14 12:43:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:36,170 INFO 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 12:43:36,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:36,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152591463] [2024-06-14 12:43:36,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152591463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:36,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:36,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:36,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860091939] [2024-06-14 12:43:36,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:36,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:36,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:36,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:36,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:36,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:36,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 154 transitions, 1223 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:36,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:36,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:36,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:36,919 INFO L124 PetriNetUnfolderBase]: 2092/3161 cut-off events. [2024-06-14 12:43:36,919 INFO L125 PetriNetUnfolderBase]: For 104067/104071 co-relation queries the response was YES. [2024-06-14 12:43:36,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19909 conditions, 3161 events. 2092/3161 cut-off events. For 104067/104071 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15053 event pairs, 522 based on Foata normal form. 8/3168 useless extension candidates. Maximal degree in co-relation 19843. Up to 3031 conditions per place. [2024-06-14 12:43:36,940 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 139 selfloop transitions, 30 changer transitions 0/172 dead transitions. [2024-06-14 12:43:36,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 172 transitions, 1653 flow [2024-06-14 12:43:36,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 12:43:36,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-14 12:43:36,941 INFO L175 Difference]: Start difference. First operand has 138 places, 154 transitions, 1223 flow. Second operand 7 states and 110 transitions. [2024-06-14 12:43:36,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 172 transitions, 1653 flow [2024-06-14 12:43:37,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 172 transitions, 1603 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 12:43:37,023 INFO L231 Difference]: Finished difference. Result has 140 places, 157 transitions, 1291 flow [2024-06-14 12:43:37,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1291, PETRI_PLACES=140, PETRI_TRANSITIONS=157} [2024-06-14 12:43:37,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-14 12:43:37,024 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 157 transitions, 1291 flow [2024-06-14 12:43:37,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:37,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:37,024 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 12:43:37,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:43:37,024 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:37,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:37,025 INFO L85 PathProgramCache]: Analyzing trace with hash -939071869, now seen corresponding path program 1 times [2024-06-14 12:43:37,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:37,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997243495] [2024-06-14 12:43:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:37,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:37,914 INFO 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 12:43:37,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:37,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997243495] [2024-06-14 12:43:37,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997243495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:37,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:37,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:37,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842408635] [2024-06-14 12:43:37,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:37,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:37,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:37,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:37,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:37,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:37,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 157 transitions, 1291 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:37,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:37,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:37,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:38,487 INFO L124 PetriNetUnfolderBase]: 2110/3182 cut-off events. [2024-06-14 12:43:38,487 INFO L125 PetriNetUnfolderBase]: For 108576/108576 co-relation queries the response was YES. [2024-06-14 12:43:38,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20529 conditions, 3182 events. 2110/3182 cut-off events. For 108576/108576 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15138 event pairs, 503 based on Foata normal form. 2/3183 useless extension candidates. Maximal degree in co-relation 20462. Up to 3115 conditions per place. [2024-06-14 12:43:38,509 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 23 changer transitions 0/185 dead transitions. [2024-06-14 12:43:38,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 185 transitions, 1848 flow [2024-06-14 12:43:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:43:38,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-14 12:43:38,511 INFO L175 Difference]: Start difference. First operand has 140 places, 157 transitions, 1291 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:43:38,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 185 transitions, 1848 flow [2024-06-14 12:43:38,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 185 transitions, 1752 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:43:38,608 INFO L231 Difference]: Finished difference. Result has 143 places, 165 transitions, 1335 flow [2024-06-14 12:43:38,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1335, PETRI_PLACES=143, PETRI_TRANSITIONS=165} [2024-06-14 12:43:38,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-14 12:43:38,608 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 165 transitions, 1335 flow [2024-06-14 12:43:38,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:38,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:38,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:38,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:43:38,609 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:38,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:38,609 INFO L85 PathProgramCache]: Analyzing trace with hash 765063633, now seen corresponding path program 2 times [2024-06-14 12:43:38,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:38,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302221274] [2024-06-14 12:43:38,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:38,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:39,408 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 12:43:39,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:39,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302221274] [2024-06-14 12:43:39,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302221274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:39,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:39,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:39,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892807108] [2024-06-14 12:43:39,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:39,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:39,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:39,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:39,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:39,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:39,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 165 transitions, 1335 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:39,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:39,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:39,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:39,969 INFO L124 PetriNetUnfolderBase]: 2120/3196 cut-off events. [2024-06-14 12:43:39,969 INFO L125 PetriNetUnfolderBase]: For 114793/114793 co-relation queries the response was YES. [2024-06-14 12:43:39,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21034 conditions, 3196 events. 2120/3196 cut-off events. For 114793/114793 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15188 event pairs, 508 based on Foata normal form. 2/3197 useless extension candidates. Maximal degree in co-relation 20965. Up to 3151 conditions per place. [2024-06-14 12:43:39,991 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 162 selfloop transitions, 19 changer transitions 0/184 dead transitions. [2024-06-14 12:43:39,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 184 transitions, 1781 flow [2024-06-14 12:43:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:39,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:39,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-14 12:43:39,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-14 12:43:39,993 INFO L175 Difference]: Start difference. First operand has 143 places, 165 transitions, 1335 flow. Second operand 7 states and 108 transitions. [2024-06-14 12:43:39,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 184 transitions, 1781 flow [2024-06-14 12:43:40,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 184 transitions, 1717 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 12:43:40,094 INFO L231 Difference]: Finished difference. Result has 147 places, 168 transitions, 1358 flow [2024-06-14 12:43:40,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1358, PETRI_PLACES=147, PETRI_TRANSITIONS=168} [2024-06-14 12:43:40,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-14 12:43:40,095 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 168 transitions, 1358 flow [2024-06-14 12:43:40,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:40,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:40,095 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 12:43:40,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:43:40,095 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:40,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:40,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1102507781, now seen corresponding path program 3 times [2024-06-14 12:43:40,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:40,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398873378] [2024-06-14 12:43:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:40,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:40,942 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 12:43:40,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:40,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398873378] [2024-06-14 12:43:40,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398873378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:40,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:40,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:40,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478912193] [2024-06-14 12:43:40,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:40,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:40,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:40,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:40,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:40,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:40,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 168 transitions, 1358 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:40,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:40,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:40,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:41,557 INFO L124 PetriNetUnfolderBase]: 2114/3188 cut-off events. [2024-06-14 12:43:41,557 INFO L125 PetriNetUnfolderBase]: For 119044/119044 co-relation queries the response was YES. [2024-06-14 12:43:41,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21086 conditions, 3188 events. 2114/3188 cut-off events. For 119044/119044 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15148 event pairs, 504 based on Foata normal form. 2/3189 useless extension candidates. Maximal degree in co-relation 21015. Up to 3158 conditions per place. [2024-06-14 12:43:41,581 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 14 changer transitions 0/181 dead transitions. [2024-06-14 12:43:41,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 181 transitions, 1758 flow [2024-06-14 12:43:41,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-14 12:43:41,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554006968641115 [2024-06-14 12:43:41,582 INFO L175 Difference]: Start difference. First operand has 147 places, 168 transitions, 1358 flow. Second operand 7 states and 102 transitions. [2024-06-14 12:43:41,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 181 transitions, 1758 flow [2024-06-14 12:43:41,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 181 transitions, 1704 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:43:41,682 INFO L231 Difference]: Finished difference. Result has 149 places, 169 transitions, 1349 flow [2024-06-14 12:43:41,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1349, PETRI_PLACES=149, PETRI_TRANSITIONS=169} [2024-06-14 12:43:41,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-14 12:43:41,683 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 169 transitions, 1349 flow [2024-06-14 12:43:41,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:41,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:41,683 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 12:43:41,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:43:41,684 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:41,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash 971984200, now seen corresponding path program 1 times [2024-06-14 12:43:41,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:41,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843824936] [2024-06-14 12:43:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:41,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:42,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:42,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843824936] [2024-06-14 12:43:42,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843824936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:42,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:42,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:42,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809092300] [2024-06-14 12:43:42,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:42,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:42,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:42,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:42,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:42,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:42,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 169 transitions, 1349 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:42,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:42,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:42,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:42,927 INFO L124 PetriNetUnfolderBase]: 2111/3184 cut-off events. [2024-06-14 12:43:42,927 INFO L125 PetriNetUnfolderBase]: For 123462/123462 co-relation queries the response was YES. [2024-06-14 12:43:42,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21163 conditions, 3184 events. 2111/3184 cut-off events. For 123462/123462 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15133 event pairs, 503 based on Foata normal form. 1/3184 useless extension candidates. Maximal degree in co-relation 21091. Up to 3156 conditions per place. [2024-06-14 12:43:42,949 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 163 selfloop transitions, 16 changer transitions 0/182 dead transitions. [2024-06-14 12:43:42,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 182 transitions, 1776 flow [2024-06-14 12:43:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:43:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:43:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-06-14 12:43:42,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699186991869919 [2024-06-14 12:43:42,951 INFO L175 Difference]: Start difference. First operand has 149 places, 169 transitions, 1349 flow. Second operand 6 states and 91 transitions. [2024-06-14 12:43:42,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 182 transitions, 1776 flow [2024-06-14 12:43:43,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 182 transitions, 1744 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:43:43,072 INFO L231 Difference]: Finished difference. Result has 150 places, 172 transitions, 1405 flow [2024-06-14 12:43:43,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1405, PETRI_PLACES=150, PETRI_TRANSITIONS=172} [2024-06-14 12:43:43,073 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-14 12:43:43,073 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 172 transitions, 1405 flow [2024-06-14 12:43:43,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:43,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:43,074 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 12:43:43,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:43:43,074 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:43,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:43,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1887988959, now seen corresponding path program 1 times [2024-06-14 12:43:43,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:43,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131003298] [2024-06-14 12:43:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:43,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:44,519 INFO 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 12:43:44,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:44,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131003298] [2024-06-14 12:43:44,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131003298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:44,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:44,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:43:44,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509734984] [2024-06-14 12:43:44,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:44,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:43:44,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:44,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:43:44,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:43:44,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:44,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 172 transitions, 1405 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:44,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:44,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:44,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:45,338 INFO L124 PetriNetUnfolderBase]: 2279/3434 cut-off events. [2024-06-14 12:43:45,339 INFO L125 PetriNetUnfolderBase]: For 130714/130718 co-relation queries the response was YES. [2024-06-14 12:43:45,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22726 conditions, 3434 events. 2279/3434 cut-off events. For 130714/130718 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16430 event pairs, 522 based on Foata normal form. 6/3439 useless extension candidates. Maximal degree in co-relation 22653. Up to 3222 conditions per place. [2024-06-14 12:43:45,366 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 195 selfloop transitions, 47 changer transitions 0/245 dead transitions. [2024-06-14 12:43:45,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 245 transitions, 2328 flow [2024-06-14 12:43:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:43:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:43:45,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-14 12:43:45,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835920177383592 [2024-06-14 12:43:45,368 INFO L175 Difference]: Start difference. First operand has 150 places, 172 transitions, 1405 flow. Second operand 11 states and 173 transitions. [2024-06-14 12:43:45,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 245 transitions, 2328 flow [2024-06-14 12:43:45,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 245 transitions, 2278 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:43:45,504 INFO L231 Difference]: Finished difference. Result has 163 places, 207 transitions, 1884 flow [2024-06-14 12:43:45,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1884, PETRI_PLACES=163, PETRI_TRANSITIONS=207} [2024-06-14 12:43:45,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-14 12:43:45,505 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 207 transitions, 1884 flow [2024-06-14 12:43:45,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:45,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:45,505 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 12:43:45,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:43:45,505 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 12:43:45,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:45,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1396730181, now seen corresponding path program 2 times [2024-06-14 12:43:45,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:45,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200836140] [2024-06-14 12:43:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:45,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:47,191 INFO 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 12:43:47,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:47,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200836140] [2024-06-14 12:43:47,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200836140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:47,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:47,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:43:47,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780927828] [2024-06-14 12:43:47,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:47,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:43:47,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:47,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:43:47,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:43:47,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:47,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 207 transitions, 1884 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:47,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:47,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:47,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:48,083 INFO L124 PetriNetUnfolderBase]: 2274/3427 cut-off events. [2024-06-14 12:43:48,083 INFO L125 PetriNetUnfolderBase]: For 138701/138709 co-relation queries the response was YES. [2024-06-14 12:43:48,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23598 conditions, 3427 events. 2274/3427 cut-off events. For 138701/138709 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16430 event pairs, 464 based on Foata normal form. 10/3436 useless extension candidates. Maximal degree in co-relation 23518. Up to 3092 conditions per place. [2024-06-14 12:43:48,109 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 172 selfloop transitions, 70 changer transitions 0/245 dead transitions. [2024-06-14 12:43:48,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 245 transitions, 2570 flow [2024-06-14 12:43:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:43:48,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 12:43:48,110 INFO L175 Difference]: Start difference. First operand has 163 places, 207 transitions, 1884 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:43:48,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 245 transitions, 2570 flow [2024-06-14 12:43:48,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 245 transitions, 2490 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-06-14 12:43:48,257 INFO L231 Difference]: Finished difference. Result has 172 places, 213 transitions, 2102 flow [2024-06-14 12:43:48,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2102, PETRI_PLACES=172, PETRI_TRANSITIONS=213} [2024-06-14 12:43:48,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-14 12:43:48,258 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 213 transitions, 2102 flow [2024-06-14 12:43:48,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:48,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:48,259 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 12:43:48,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:43:48,259 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 12:43:48,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:48,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1512201089, now seen corresponding path program 1 times [2024-06-14 12:43:48,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:48,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688108460] [2024-06-14 12:43:48,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:48,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:49,747 INFO 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 12:43:49,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:49,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688108460] [2024-06-14 12:43:49,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688108460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:49,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:49,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:43:49,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475539435] [2024-06-14 12:43:49,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:49,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:43:49,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:49,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:43:49,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:43:49,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:49,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 213 transitions, 2102 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:49,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:49,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:49,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:50,711 INFO L124 PetriNetUnfolderBase]: 2349/3554 cut-off events. [2024-06-14 12:43:50,711 INFO L125 PetriNetUnfolderBase]: For 162116/162128 co-relation queries the response was YES. [2024-06-14 12:43:50,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25399 conditions, 3554 events. 2349/3554 cut-off events. For 162116/162128 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17315 event pairs, 481 based on Foata normal form. 32/3585 useless extension candidates. Maximal degree in co-relation 25315. Up to 3154 conditions per place. [2024-06-14 12:43:50,744 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 205 selfloop transitions, 48 changer transitions 0/256 dead transitions. [2024-06-14 12:43:50,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 256 transitions, 2812 flow [2024-06-14 12:43:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:43:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:43:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 12:43:50,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 12:43:50,745 INFO L175 Difference]: Start difference. First operand has 172 places, 213 transitions, 2102 flow. Second operand 10 states and 164 transitions. [2024-06-14 12:43:50,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 256 transitions, 2812 flow [2024-06-14 12:43:50,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 256 transitions, 2604 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:50,953 INFO L231 Difference]: Finished difference. Result has 176 places, 214 transitions, 2055 flow [2024-06-14 12:43:50,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2055, PETRI_PLACES=176, PETRI_TRANSITIONS=214} [2024-06-14 12:43:50,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-14 12:43:50,954 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 214 transitions, 2055 flow [2024-06-14 12:43:50,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:50,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:50,954 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 12:43:50,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:43:50,954 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:50,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:50,955 INFO L85 PathProgramCache]: Analyzing trace with hash 814532250, now seen corresponding path program 1 times [2024-06-14 12:43:50,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:50,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915686240] [2024-06-14 12:43:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:50,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:51,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:51,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915686240] [2024-06-14 12:43:51,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915686240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:51,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:51,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:51,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148955118] [2024-06-14 12:43:51,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:51,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:51,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:51,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:51,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:51,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:51,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 214 transitions, 2055 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:51,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:51,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:51,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:52,336 INFO L124 PetriNetUnfolderBase]: 2386/3604 cut-off events. [2024-06-14 12:43:52,337 INFO L125 PetriNetUnfolderBase]: For 151473/151481 co-relation queries the response was YES. [2024-06-14 12:43:52,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25215 conditions, 3604 events. 2386/3604 cut-off events. For 151473/151481 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17600 event pairs, 503 based on Foata normal form. 10/3613 useless extension candidates. Maximal degree in co-relation 25130. Up to 3509 conditions per place. [2024-06-14 12:43:52,368 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 35 changer transitions 0/241 dead transitions. [2024-06-14 12:43:52,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 241 transitions, 2788 flow [2024-06-14 12:43:52,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:52,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 12:43:52,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-14 12:43:52,369 INFO L175 Difference]: Start difference. First operand has 176 places, 214 transitions, 2055 flow. Second operand 7 states and 111 transitions. [2024-06-14 12:43:52,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 241 transitions, 2788 flow [2024-06-14 12:43:52,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 241 transitions, 2671 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 12:43:52,552 INFO L231 Difference]: Finished difference. Result has 177 places, 226 transitions, 2201 flow [2024-06-14 12:43:52,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2201, PETRI_PLACES=177, PETRI_TRANSITIONS=226} [2024-06-14 12:43:52,553 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-14 12:43:52,553 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 226 transitions, 2201 flow [2024-06-14 12:43:52,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:52,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:52,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:52,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:43:52,554 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:52,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:52,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1368431446, now seen corresponding path program 2 times [2024-06-14 12:43:52,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:52,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902519176] [2024-06-14 12:43:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:52,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:53,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:53,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902519176] [2024-06-14 12:43:53,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902519176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:53,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:53,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:53,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122154556] [2024-06-14 12:43:53,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:53,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:53,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:53,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:53,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:53,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:53,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 226 transitions, 2201 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:53,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:53,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:53,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:54,022 INFO L124 PetriNetUnfolderBase]: 2380/3596 cut-off events. [2024-06-14 12:43:54,022 INFO L125 PetriNetUnfolderBase]: For 154553/154561 co-relation queries the response was YES. [2024-06-14 12:43:54,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25354 conditions, 3596 events. 2380/3596 cut-off events. For 154553/154561 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17518 event pairs, 505 based on Foata normal form. 10/3605 useless extension candidates. Maximal degree in co-relation 25266. Up to 3539 conditions per place. [2024-06-14 12:43:54,054 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 209 selfloop transitions, 23 changer transitions 0/235 dead transitions. [2024-06-14 12:43:54,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 235 transitions, 2691 flow [2024-06-14 12:43:54,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:43:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:43:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-14 12:43:54,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 12:43:54,056 INFO L175 Difference]: Start difference. First operand has 177 places, 226 transitions, 2201 flow. Second operand 6 states and 93 transitions. [2024-06-14 12:43:54,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 235 transitions, 2691 flow [2024-06-14 12:43:54,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 235 transitions, 2607 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-14 12:43:54,242 INFO L231 Difference]: Finished difference. Result has 180 places, 226 transitions, 2173 flow [2024-06-14 12:43:54,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2173, PETRI_PLACES=180, PETRI_TRANSITIONS=226} [2024-06-14 12:43:54,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-14 12:43:54,242 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 226 transitions, 2173 flow [2024-06-14 12:43:54,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:54,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:54,243 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 12:43:54,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:43:54,243 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 12:43:54,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:54,244 INFO L85 PathProgramCache]: Analyzing trace with hash 637865763, now seen corresponding path program 2 times [2024-06-14 12:43:54,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:54,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347773861] [2024-06-14 12:43:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:54,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:55,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:55,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347773861] [2024-06-14 12:43:55,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347773861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:55,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:55,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:43:55,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822507303] [2024-06-14 12:43:55,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:55,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:43:55,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:55,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:43:55,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:43:55,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:55,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 226 transitions, 2173 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:55,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:55,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:55,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:56,522 INFO L124 PetriNetUnfolderBase]: 2455/3725 cut-off events. [2024-06-14 12:43:56,522 INFO L125 PetriNetUnfolderBase]: For 169774/169778 co-relation queries the response was YES. [2024-06-14 12:43:56,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26243 conditions, 3725 events. 2455/3725 cut-off events. For 169774/169778 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 18434 event pairs, 485 based on Foata normal form. 24/3748 useless extension candidates. Maximal degree in co-relation 26154. Up to 3334 conditions per place. [2024-06-14 12:43:56,561 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 212 selfloop transitions, 52 changer transitions 0/267 dead transitions. [2024-06-14 12:43:56,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 267 transitions, 2891 flow [2024-06-14 12:43:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:43:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:43:56,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 12:43:56,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 12:43:56,564 INFO L175 Difference]: Start difference. First operand has 180 places, 226 transitions, 2173 flow. Second operand 10 states and 165 transitions. [2024-06-14 12:43:56,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 267 transitions, 2891 flow [2024-06-14 12:43:56,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 267 transitions, 2847 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 12:43:56,742 INFO L231 Difference]: Finished difference. Result has 186 places, 227 transitions, 2292 flow [2024-06-14 12:43:56,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2292, PETRI_PLACES=186, PETRI_TRANSITIONS=227} [2024-06-14 12:43:56,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-14 12:43:56,744 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 227 transitions, 2292 flow [2024-06-14 12:43:56,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:56,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:56,744 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 12:43:56,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:43:56,745 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 12:43:56,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:56,745 INFO L85 PathProgramCache]: Analyzing trace with hash 810594663, now seen corresponding path program 3 times [2024-06-14 12:43:56,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:56,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376423887] [2024-06-14 12:43:56,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:56,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:57,766 INFO 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 12:43:57,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:57,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376423887] [2024-06-14 12:43:57,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376423887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:57,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:57,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:43:57,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271816979] [2024-06-14 12:43:57,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:57,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:43:57,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:57,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:43:57,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:43:57,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:43:57,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 227 transitions, 2292 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:57,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:57,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:43:57,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:58,696 INFO L124 PetriNetUnfolderBase]: 2616/3988 cut-off events. [2024-06-14 12:43:58,697 INFO L125 PetriNetUnfolderBase]: For 194481/194489 co-relation queries the response was YES. [2024-06-14 12:43:58,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29174 conditions, 3988 events. 2616/3988 cut-off events. For 194481/194489 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20282 event pairs, 510 based on Foata normal form. 24/4011 useless extension candidates. Maximal degree in co-relation 29084. Up to 3250 conditions per place. [2024-06-14 12:43:58,729 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 45 changer transitions 0/272 dead transitions. [2024-06-14 12:43:58,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 272 transitions, 3278 flow [2024-06-14 12:43:58,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:58,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:43:58,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-14 12:43:58,731 INFO L175 Difference]: Start difference. First operand has 186 places, 227 transitions, 2292 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:43:58,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 272 transitions, 3278 flow [2024-06-14 12:43:58,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 272 transitions, 3149 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 12:43:58,953 INFO L231 Difference]: Finished difference. Result has 188 places, 230 transitions, 2399 flow [2024-06-14 12:43:58,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2399, PETRI_PLACES=188, PETRI_TRANSITIONS=230} [2024-06-14 12:43:58,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-14 12:43:58,954 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 230 transitions, 2399 flow [2024-06-14 12:43:58,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:58,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:58,955 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 12:43:58,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:43:58,955 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:58,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1077256457, now seen corresponding path program 4 times [2024-06-14 12:43:58,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:58,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385712573] [2024-06-14 12:43:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:58,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:00,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:00,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385712573] [2024-06-14 12:44:00,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385712573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:00,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:00,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:44:00,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508655673] [2024-06-14 12:44:00,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:00,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:44:00,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:00,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:44:00,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:44:00,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:00,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 230 transitions, 2399 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:00,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:00,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:00,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:01,304 INFO L124 PetriNetUnfolderBase]: 2836/4331 cut-off events. [2024-06-14 12:44:01,304 INFO L125 PetriNetUnfolderBase]: For 209315/209315 co-relation queries the response was YES. [2024-06-14 12:44:01,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31238 conditions, 4331 events. 2836/4331 cut-off events. For 209315/209315 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 22440 event pairs, 651 based on Foata normal form. 20/4350 useless extension candidates. Maximal degree in co-relation 31146. Up to 4037 conditions per place. [2024-06-14 12:44:01,346 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 264 selfloop transitions, 41 changer transitions 0/308 dead transitions. [2024-06-14 12:44:01,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 308 transitions, 3508 flow [2024-06-14 12:44:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:44:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:44:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-14 12:44:01,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-14 12:44:01,348 INFO L175 Difference]: Start difference. First operand has 188 places, 230 transitions, 2399 flow. Second operand 12 states and 194 transitions. [2024-06-14 12:44:01,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 308 transitions, 3508 flow [2024-06-14 12:44:01,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 308 transitions, 3403 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:44:01,705 INFO L231 Difference]: Finished difference. Result has 201 places, 258 transitions, 2800 flow [2024-06-14 12:44:01,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2800, PETRI_PLACES=201, PETRI_TRANSITIONS=258} [2024-06-14 12:44:01,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-14 12:44:01,706 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 258 transitions, 2800 flow [2024-06-14 12:44:01,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:01,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:01,706 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 12:44:01,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:44:01,707 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:01,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:01,707 INFO L85 PathProgramCache]: Analyzing trace with hash -416729275, now seen corresponding path program 5 times [2024-06-14 12:44:01,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:01,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060922309] [2024-06-14 12:44:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:01,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:03,391 INFO 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 12:44:03,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:03,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060922309] [2024-06-14 12:44:03,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060922309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:03,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:03,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:44:03,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939189172] [2024-06-14 12:44:03,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:03,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:44:03,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:03,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:44:03,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:44:03,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:03,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 258 transitions, 2800 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:03,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:03,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:03,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:04,576 INFO L124 PetriNetUnfolderBase]: 2928/4479 cut-off events. [2024-06-14 12:44:04,576 INFO L125 PetriNetUnfolderBase]: For 222377/222385 co-relation queries the response was YES. [2024-06-14 12:44:04,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32988 conditions, 4479 events. 2928/4479 cut-off events. For 222377/222385 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 23500 event pairs, 598 based on Foata normal form. 28/4506 useless extension candidates. Maximal degree in co-relation 32888. Up to 3891 conditions per place. [2024-06-14 12:44:04,620 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 233 selfloop transitions, 67 changer transitions 0/303 dead transitions. [2024-06-14 12:44:04,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 303 transitions, 3675 flow [2024-06-14 12:44:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:44:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:44:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-14 12:44:04,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-14 12:44:04,621 INFO L175 Difference]: Start difference. First operand has 201 places, 258 transitions, 2800 flow. Second operand 10 states and 166 transitions. [2024-06-14 12:44:04,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 303 transitions, 3675 flow [2024-06-14 12:44:04,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 303 transitions, 3597 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 12:44:04,990 INFO L231 Difference]: Finished difference. Result has 208 places, 263 transitions, 3003 flow [2024-06-14 12:44:04,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3003, PETRI_PLACES=208, PETRI_TRANSITIONS=263} [2024-06-14 12:44:04,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-14 12:44:04,990 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 263 transitions, 3003 flow [2024-06-14 12:44:04,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:04,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:04,991 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 12:44:04,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:44:04,991 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:04,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:04,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1159818571, now seen corresponding path program 6 times [2024-06-14 12:44:04,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:04,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360496090] [2024-06-14 12:44:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:04,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:06,304 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 12:44:06,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:06,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360496090] [2024-06-14 12:44:06,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360496090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:06,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:06,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:44:06,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990128768] [2024-06-14 12:44:06,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:06,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:44:06,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:06,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:44:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:44:06,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:06,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 263 transitions, 3003 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:06,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:06,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:06,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:07,367 INFO L124 PetriNetUnfolderBase]: 3262/4979 cut-off events. [2024-06-14 12:44:07,367 INFO L125 PetriNetUnfolderBase]: For 237009/237013 co-relation queries the response was YES. [2024-06-14 12:44:07,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36421 conditions, 4979 events. 3262/4979 cut-off events. For 237009/237013 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 26554 event pairs, 641 based on Foata normal form. 24/5002 useless extension candidates. Maximal degree in co-relation 36320. Up to 4561 conditions per place. [2024-06-14 12:44:07,428 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 288 selfloop transitions, 65 changer transitions 0/356 dead transitions. [2024-06-14 12:44:07,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 356 transitions, 4516 flow [2024-06-14 12:44:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:44:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:44:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-14 12:44:07,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-14 12:44:07,429 INFO L175 Difference]: Start difference. First operand has 208 places, 263 transitions, 3003 flow. Second operand 12 states and 190 transitions. [2024-06-14 12:44:07,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 356 transitions, 4516 flow [2024-06-14 12:44:07,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 356 transitions, 4290 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 12:44:07,959 INFO L231 Difference]: Finished difference. Result has 218 places, 308 transitions, 3666 flow [2024-06-14 12:44:07,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2847, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3666, PETRI_PLACES=218, PETRI_TRANSITIONS=308} [2024-06-14 12:44:07,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-14 12:44:07,960 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 308 transitions, 3666 flow [2024-06-14 12:44:07,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:07,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:07,961 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 12:44:07,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:44:07,961 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 12:44:07,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:07,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1873596500, now seen corresponding path program 1 times [2024-06-14 12:44:07,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:07,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533113993] [2024-06-14 12:44:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:07,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:08,749 INFO 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 12:44:08,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:08,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533113993] [2024-06-14 12:44:08,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533113993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:08,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:08,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:44:08,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36817826] [2024-06-14 12:44:08,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:08,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:44:08,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:08,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:44:08,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:44:08,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:08,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 308 transitions, 3666 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:08,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:08,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:08,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:09,781 INFO L124 PetriNetUnfolderBase]: 3270/4993 cut-off events. [2024-06-14 12:44:09,781 INFO L125 PetriNetUnfolderBase]: For 221208/221216 co-relation queries the response was YES. [2024-06-14 12:44:09,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36519 conditions, 4993 events. 3270/4993 cut-off events. For 221208/221216 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 26589 event pairs, 693 based on Foata normal form. 10/5002 useless extension candidates. Maximal degree in co-relation 36412. Up to 4925 conditions per place. [2024-06-14 12:44:09,826 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 288 selfloop transitions, 28 changer transitions 0/319 dead transitions. [2024-06-14 12:44:09,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 319 transitions, 4356 flow [2024-06-14 12:44:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:44:09,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:44:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-14 12:44:09,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 12:44:09,828 INFO L175 Difference]: Start difference. First operand has 218 places, 308 transitions, 3666 flow. Second operand 6 states and 93 transitions. [2024-06-14 12:44:09,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 319 transitions, 4356 flow [2024-06-14 12:44:10,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 319 transitions, 4214 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 12:44:10,338 INFO L231 Difference]: Finished difference. Result has 216 places, 310 transitions, 3626 flow [2024-06-14 12:44:10,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3524, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3626, PETRI_PLACES=216, PETRI_TRANSITIONS=310} [2024-06-14 12:44:10,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-14 12:44:10,339 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 310 transitions, 3626 flow [2024-06-14 12:44:10,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:10,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:10,339 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 12:44:10,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:44:10,339 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 12:44:10,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:10,340 INFO L85 PathProgramCache]: Analyzing trace with hash 945797496, now seen corresponding path program 3 times [2024-06-14 12:44:10,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:10,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719093168] [2024-06-14 12:44:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:10,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:11,112 INFO 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 12:44:11,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:11,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719093168] [2024-06-14 12:44:11,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719093168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:11,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:11,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:44:11,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522866585] [2024-06-14 12:44:11,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:11,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:44:11,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:11,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:44:11,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:44:11,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:11,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 310 transitions, 3626 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:11,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:11,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:11,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:12,126 INFO L124 PetriNetUnfolderBase]: 3280/5007 cut-off events. [2024-06-14 12:44:12,127 INFO L125 PetriNetUnfolderBase]: For 224173/224181 co-relation queries the response was YES. [2024-06-14 12:44:12,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36475 conditions, 5007 events. 3280/5007 cut-off events. For 224173/224181 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 26721 event pairs, 698 based on Foata normal form. 10/5016 useless extension candidates. Maximal degree in co-relation 36369. Up to 4920 conditions per place. [2024-06-14 12:44:12,178 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 294 selfloop transitions, 32 changer transitions 0/329 dead transitions. [2024-06-14 12:44:12,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 329 transitions, 4384 flow [2024-06-14 12:44:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:44:12,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:44:12,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 12:44:12,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-14 12:44:12,180 INFO L175 Difference]: Start difference. First operand has 216 places, 310 transitions, 3626 flow. Second operand 7 states and 109 transitions. [2024-06-14 12:44:12,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 329 transitions, 4384 flow [2024-06-14 12:44:12,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 329 transitions, 4306 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 12:44:12,648 INFO L231 Difference]: Finished difference. Result has 219 places, 313 transitions, 3680 flow [2024-06-14 12:44:12,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3548, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3680, PETRI_PLACES=219, PETRI_TRANSITIONS=313} [2024-06-14 12:44:12,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-14 12:44:12,648 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 313 transitions, 3680 flow [2024-06-14 12:44:12,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:12,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:12,649 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 12:44:12,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:44:12,649 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:12,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2052838260, now seen corresponding path program 4 times [2024-06-14 12:44:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:12,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020110864] [2024-06-14 12:44:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:12,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:13,388 INFO 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 12:44:13,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:13,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020110864] [2024-06-14 12:44:13,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020110864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:13,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:13,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:44:13,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285815654] [2024-06-14 12:44:13,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:13,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:44:13,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:13,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:44:13,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:44:13,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:13,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 313 transitions, 3680 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:13,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:13,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:13,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:14,289 INFO L124 PetriNetUnfolderBase]: 3298/5032 cut-off events. [2024-06-14 12:44:14,289 INFO L125 PetriNetUnfolderBase]: For 232801/232809 co-relation queries the response was YES. [2024-06-14 12:44:14,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37170 conditions, 5032 events. 3298/5032 cut-off events. For 232801/232809 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 26853 event pairs, 698 based on Foata normal form. 10/5041 useless extension candidates. Maximal degree in co-relation 37063. Up to 4883 conditions per place. [2024-06-14 12:44:14,341 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 283 selfloop transitions, 52 changer transitions 0/338 dead transitions. [2024-06-14 12:44:14,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 338 transitions, 4636 flow [2024-06-14 12:44:14,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:44:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:44:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:44:14,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:44:14,343 INFO L175 Difference]: Start difference. First operand has 219 places, 313 transitions, 3680 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:44:14,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 338 transitions, 4636 flow [2024-06-14 12:44:14,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 338 transitions, 4496 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:44:14,795 INFO L231 Difference]: Finished difference. Result has 222 places, 322 transitions, 3819 flow [2024-06-14 12:44:14,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3819, PETRI_PLACES=222, PETRI_TRANSITIONS=322} [2024-06-14 12:44:14,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-14 12:44:14,795 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 322 transitions, 3819 flow [2024-06-14 12:44:14,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:14,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:14,796 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 12:44:14,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:44:14,796 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:14,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:14,796 INFO L85 PathProgramCache]: Analyzing trace with hash 286728039, now seen corresponding path program 7 times [2024-06-14 12:44:14,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:14,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902312282] [2024-06-14 12:44:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:14,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:16,106 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 12:44:16,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:16,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902312282] [2024-06-14 12:44:16,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902312282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:16,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:16,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:44:16,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310062343] [2024-06-14 12:44:16,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:16,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:44:16,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:16,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:44:16,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:44:16,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:16,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 322 transitions, 3819 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:16,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:16,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:16,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:17,437 INFO L124 PetriNetUnfolderBase]: 3500/5344 cut-off events. [2024-06-14 12:44:17,437 INFO L125 PetriNetUnfolderBase]: For 263970/263978 co-relation queries the response was YES. [2024-06-14 12:44:17,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39745 conditions, 5344 events. 3500/5344 cut-off events. For 263970/263978 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 28924 event pairs, 678 based on Foata normal form. 28/5371 useless extension candidates. Maximal degree in co-relation 39637. Up to 4728 conditions per place. [2024-06-14 12:44:17,489 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 291 selfloop transitions, 93 changer transitions 0/387 dead transitions. [2024-06-14 12:44:17,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 387 transitions, 5061 flow [2024-06-14 12:44:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:44:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:44:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-14 12:44:17,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.401330376940133 [2024-06-14 12:44:17,491 INFO L175 Difference]: Start difference. First operand has 222 places, 322 transitions, 3819 flow. Second operand 11 states and 181 transitions. [2024-06-14 12:44:17,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 387 transitions, 5061 flow [2024-06-14 12:44:18,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 387 transitions, 4975 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-14 12:44:18,011 INFO L231 Difference]: Finished difference. Result has 234 places, 343 transitions, 4319 flow [2024-06-14 12:44:18,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3733, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4319, PETRI_PLACES=234, PETRI_TRANSITIONS=343} [2024-06-14 12:44:18,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-14 12:44:18,011 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 343 transitions, 4319 flow [2024-06-14 12:44:18,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:18,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:18,012 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 12:44:18,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:44:18,012 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:18,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:18,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1836093783, now seen corresponding path program 8 times [2024-06-14 12:44:18,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:18,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027390339] [2024-06-14 12:44:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:18,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:19,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:19,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027390339] [2024-06-14 12:44:19,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027390339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:19,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:19,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:44:19,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930044338] [2024-06-14 12:44:19,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:19,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:44:19,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:19,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:44:19,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:44:19,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:19,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 343 transitions, 4319 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:19,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:19,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:19,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:20,714 INFO L124 PetriNetUnfolderBase]: 3614/5528 cut-off events. [2024-06-14 12:44:20,714 INFO L125 PetriNetUnfolderBase]: For 274430/274438 co-relation queries the response was YES. [2024-06-14 12:44:20,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41782 conditions, 5528 events. 3614/5528 cut-off events. For 274430/274438 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 30166 event pairs, 726 based on Foata normal form. 28/5555 useless extension candidates. Maximal degree in co-relation 41668. Up to 5209 conditions per place. [2024-06-14 12:44:20,763 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 343 selfloop transitions, 49 changer transitions 0/395 dead transitions. [2024-06-14 12:44:20,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 395 transitions, 5440 flow [2024-06-14 12:44:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:44:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:44:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-14 12:44:20,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924611973392461 [2024-06-14 12:44:20,765 INFO L175 Difference]: Start difference. First operand has 234 places, 343 transitions, 4319 flow. Second operand 11 states and 177 transitions. [2024-06-14 12:44:20,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 395 transitions, 5440 flow [2024-06-14 12:44:21,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 395 transitions, 5225 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-14 12:44:21,306 INFO L231 Difference]: Finished difference. Result has 243 places, 352 transitions, 4408 flow [2024-06-14 12:44:21,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4106, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4408, PETRI_PLACES=243, PETRI_TRANSITIONS=352} [2024-06-14 12:44:21,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-14 12:44:21,306 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 352 transitions, 4408 flow [2024-06-14 12:44:21,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:21,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:21,307 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 12:44:21,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:44:21,307 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 12:44:21,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:21,307 INFO L85 PathProgramCache]: Analyzing trace with hash -925893752, now seen corresponding path program 5 times [2024-06-14 12:44:21,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:21,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053167987] [2024-06-14 12:44:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:21,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:22,002 INFO 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 12:44:22,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:22,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053167987] [2024-06-14 12:44:22,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053167987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:22,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:22,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:44:22,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188104744] [2024-06-14 12:44:22,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:22,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:44:22,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:22,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:44:22,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:44:22,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:22,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 352 transitions, 4408 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:22,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:22,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:22,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:23,123 INFO L124 PetriNetUnfolderBase]: 3624/5542 cut-off events. [2024-06-14 12:44:23,123 INFO L125 PetriNetUnfolderBase]: For 265473/265481 co-relation queries the response was YES. [2024-06-14 12:44:23,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41639 conditions, 5542 events. 3624/5542 cut-off events. For 265473/265481 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30265 event pairs, 747 based on Foata normal form. 10/5551 useless extension candidates. Maximal degree in co-relation 41522. Up to 5460 conditions per place. [2024-06-14 12:44:23,191 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 330 selfloop transitions, 34 changer transitions 0/367 dead transitions. [2024-06-14 12:44:23,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 367 transitions, 5340 flow [2024-06-14 12:44:23,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:44:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:44:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-14 12:44:23,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693379790940767 [2024-06-14 12:44:23,197 INFO L175 Difference]: Start difference. First operand has 243 places, 352 transitions, 4408 flow. Second operand 7 states and 106 transitions. [2024-06-14 12:44:23,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 367 transitions, 5340 flow [2024-06-14 12:44:23,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 367 transitions, 5150 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-14 12:44:23,723 INFO L231 Difference]: Finished difference. Result has 244 places, 355 transitions, 4358 flow [2024-06-14 12:44:23,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4218, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4358, PETRI_PLACES=244, PETRI_TRANSITIONS=355} [2024-06-14 12:44:23,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-14 12:44:23,724 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 355 transitions, 4358 flow [2024-06-14 12:44:23,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:23,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:23,724 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 12:44:23,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:44:23,725 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:23,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:23,725 INFO L85 PathProgramCache]: Analyzing trace with hash 52737164, now seen corresponding path program 6 times [2024-06-14 12:44:23,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:23,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622319444] [2024-06-14 12:44:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:23,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:24,379 INFO 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 12:44:24,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:24,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622319444] [2024-06-14 12:44:24,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622319444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:24,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:24,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:44:24,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181445496] [2024-06-14 12:44:24,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:24,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:44:24,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:24,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:44:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:44:24,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:24,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 355 transitions, 4358 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:24,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:24,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:24,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:25,566 INFO L124 PetriNetUnfolderBase]: 3618/5534 cut-off events. [2024-06-14 12:44:25,566 INFO L125 PetriNetUnfolderBase]: For 264111/264119 co-relation queries the response was YES. [2024-06-14 12:44:25,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40973 conditions, 5534 events. 3618/5534 cut-off events. For 264111/264119 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 30233 event pairs, 748 based on Foata normal form. 10/5543 useless extension candidates. Maximal degree in co-relation 40856. Up to 5475 conditions per place. [2024-06-14 12:44:25,628 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 336 selfloop transitions, 26 changer transitions 0/365 dead transitions. [2024-06-14 12:44:25,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 365 transitions, 5114 flow [2024-06-14 12:44:25,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:44:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:44:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-14 12:44:25,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588850174216028 [2024-06-14 12:44:25,629 INFO L175 Difference]: Start difference. First operand has 244 places, 355 transitions, 4358 flow. Second operand 7 states and 103 transitions. [2024-06-14 12:44:25,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 365 transitions, 5114 flow [2024-06-14 12:44:26,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 365 transitions, 4933 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 12:44:26,120 INFO L231 Difference]: Finished difference. Result has 246 places, 355 transitions, 4235 flow [2024-06-14 12:44:26,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4177, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4235, PETRI_PLACES=246, PETRI_TRANSITIONS=355} [2024-06-14 12:44:26,120 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 12:44:26,120 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 355 transitions, 4235 flow [2024-06-14 12:44:26,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:26,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:26,121 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 12:44:26,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:44:26,121 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:26,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:26,121 INFO L85 PathProgramCache]: Analyzing trace with hash -931598744, now seen corresponding path program 2 times [2024-06-14 12:44:26,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:26,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605225924] [2024-06-14 12:44:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:26,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:26,946 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 12:44:26,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:26,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605225924] [2024-06-14 12:44:26,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605225924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:26,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:26,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:44:26,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420059296] [2024-06-14 12:44:26,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:26,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:44:26,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:26,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:44:26,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:44:27,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:27,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 355 transitions, 4235 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:27,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:27,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:27,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:28,141 INFO L124 PetriNetUnfolderBase]: 3626/5546 cut-off events. [2024-06-14 12:44:28,142 INFO L125 PetriNetUnfolderBase]: For 271304/271312 co-relation queries the response was YES. [2024-06-14 12:44:28,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41057 conditions, 5546 events. 3626/5546 cut-off events. For 271304/271312 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 30280 event pairs, 748 based on Foata normal form. 10/5555 useless extension candidates. Maximal degree in co-relation 40940. Up to 5476 conditions per place. [2024-06-14 12:44:28,206 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 333 selfloop transitions, 31 changer transitions 0/367 dead transitions. [2024-06-14 12:44:28,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 367 transitions, 5029 flow [2024-06-14 12:44:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:44:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:44:28,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-14 12:44:28,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-14 12:44:28,207 INFO L175 Difference]: Start difference. First operand has 246 places, 355 transitions, 4235 flow. Second operand 7 states and 104 transitions. [2024-06-14 12:44:28,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 367 transitions, 5029 flow [2024-06-14 12:44:28,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 367 transitions, 4912 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:44:28,942 INFO L231 Difference]: Finished difference. Result has 246 places, 357 transitions, 4229 flow [2024-06-14 12:44:28,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4118, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4229, PETRI_PLACES=246, PETRI_TRANSITIONS=357} [2024-06-14 12:44:28,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 12:44:28,943 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 357 transitions, 4229 flow [2024-06-14 12:44:28,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:28,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:28,943 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 12:44:28,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:44:28,943 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 12:44:28,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash 67030892, now seen corresponding path program 3 times [2024-06-14 12:44:28,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:28,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633771195] [2024-06-14 12:44:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:28,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:29,814 INFO 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 12:44:29,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:29,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633771195] [2024-06-14 12:44:29,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633771195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:29,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:29,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:44:29,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443137771] [2024-06-14 12:44:29,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:29,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:44:29,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:29,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:44:29,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:44:29,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:29,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 357 transitions, 4229 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:29,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:29,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:29,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:30,889 INFO L124 PetriNetUnfolderBase]: 3621/5539 cut-off events. [2024-06-14 12:44:30,889 INFO L125 PetriNetUnfolderBase]: For 277776/277784 co-relation queries the response was YES. [2024-06-14 12:44:30,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41069 conditions, 5539 events. 3621/5539 cut-off events. For 277776/277784 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 30192 event pairs, 745 based on Foata normal form. 10/5548 useless extension candidates. Maximal degree in co-relation 40952. Up to 5449 conditions per place. [2024-06-14 12:44:30,951 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 332 selfloop transitions, 35 changer transitions 0/370 dead transitions. [2024-06-14 12:44:30,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 370 transitions, 5035 flow [2024-06-14 12:44:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:44:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:44:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-14 12:44:30,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-14 12:44:30,952 INFO L175 Difference]: Start difference. First operand has 246 places, 357 transitions, 4229 flow. Second operand 7 states and 104 transitions. [2024-06-14 12:44:30,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 370 transitions, 5035 flow [2024-06-14 12:44:31,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 370 transitions, 4940 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:44:31,702 INFO L231 Difference]: Finished difference. Result has 248 places, 359 transitions, 4257 flow [2024-06-14 12:44:31,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4134, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4257, PETRI_PLACES=248, PETRI_TRANSITIONS=359} [2024-06-14 12:44:31,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-14 12:44:31,703 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 359 transitions, 4257 flow [2024-06-14 12:44:31,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:31,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:31,703 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 12:44:31,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:44:31,703 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:31,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:31,704 INFO L85 PathProgramCache]: Analyzing trace with hash 804099543, now seen corresponding path program 9 times [2024-06-14 12:44:31,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:31,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535594267] [2024-06-14 12:44:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:31,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:32,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:32,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535594267] [2024-06-14 12:44:32,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535594267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:32,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:32,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:44:32,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966780030] [2024-06-14 12:44:32,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:32,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:44:32,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:32,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:44:32,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:44:32,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:32,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 359 transitions, 4257 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:32,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:32,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:32,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:34,072 INFO L124 PetriNetUnfolderBase]: 3646/5586 cut-off events. [2024-06-14 12:44:34,072 INFO L125 PetriNetUnfolderBase]: For 299281/299289 co-relation queries the response was YES. [2024-06-14 12:44:34,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41325 conditions, 5586 events. 3646/5586 cut-off events. For 299281/299289 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30598 event pairs, 638 based on Foata normal form. 28/5613 useless extension candidates. Maximal degree in co-relation 41207. Up to 4265 conditions per place. [2024-06-14 12:44:34,136 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 261 selfloop transitions, 138 changer transitions 0/402 dead transitions. [2024-06-14 12:44:34,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 402 transitions, 5327 flow [2024-06-14 12:44:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:44:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:44:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 12:44:34,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-14 12:44:34,137 INFO L175 Difference]: Start difference. First operand has 248 places, 359 transitions, 4257 flow. Second operand 10 states and 168 transitions. [2024-06-14 12:44:34,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 402 transitions, 5327 flow [2024-06-14 12:44:35,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 402 transitions, 5220 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:44:35,066 INFO L231 Difference]: Finished difference. Result has 253 places, 361 transitions, 4549 flow [2024-06-14 12:44:35,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4150, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4549, PETRI_PLACES=253, PETRI_TRANSITIONS=361} [2024-06-14 12:44:35,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-14 12:44:35,067 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 361 transitions, 4549 flow [2024-06-14 12:44:35,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:35,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:35,067 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 12:44:35,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:44:35,068 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 12:44:35,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:35,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2057476604, now seen corresponding path program 1 times [2024-06-14 12:44:35,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:35,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505870063] [2024-06-14 12:44:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:35,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:36,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:36,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505870063] [2024-06-14 12:44:36,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505870063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:36,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:36,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:44:36,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156740750] [2024-06-14 12:44:36,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:36,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:44:36,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:36,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:44:36,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:44:36,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:36,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 361 transitions, 4549 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 12:44:36,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:36,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:36,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:37,383 INFO L124 PetriNetUnfolderBase]: 3666/5614 cut-off events. [2024-06-14 12:44:37,383 INFO L125 PetriNetUnfolderBase]: For 299130/299138 co-relation queries the response was YES. [2024-06-14 12:44:37,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42457 conditions, 5614 events. 3666/5614 cut-off events. For 299130/299138 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 30786 event pairs, 758 based on Foata normal form. 12/5625 useless extension candidates. Maximal degree in co-relation 42338. Up to 5408 conditions per place. [2024-06-14 12:44:37,444 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 60 changer transitions 0/385 dead transitions. [2024-06-14 12:44:37,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 385 transitions, 5457 flow [2024-06-14 12:44:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:44:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:44:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:44:37,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 12:44:37,445 INFO L175 Difference]: Start difference. First operand has 253 places, 361 transitions, 4549 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:44:37,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 385 transitions, 5457 flow [2024-06-14 12:44:38,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 385 transitions, 5166 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 12:44:38,290 INFO L231 Difference]: Finished difference. Result has 253 places, 365 transitions, 4478 flow [2024-06-14 12:44:38,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4258, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4478, PETRI_PLACES=253, PETRI_TRANSITIONS=365} [2024-06-14 12:44:38,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-14 12:44:38,291 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 365 transitions, 4478 flow [2024-06-14 12:44:38,291 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 12:44:38,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:38,291 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 12:44:38,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:44:38,291 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:38,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:38,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2057471954, now seen corresponding path program 2 times [2024-06-14 12:44:38,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:38,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305432667] [2024-06-14 12:44:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:38,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:39,368 INFO 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 12:44:39,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:39,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305432667] [2024-06-14 12:44:39,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305432667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:39,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:39,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:44:39,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316509592] [2024-06-14 12:44:39,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:39,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:44:39,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:39,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:44:39,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:44:39,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:39,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 365 transitions, 4478 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 12:44:39,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:39,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:39,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:40,576 INFO L124 PetriNetUnfolderBase]: 3684/5644 cut-off events. [2024-06-14 12:44:40,576 INFO L125 PetriNetUnfolderBase]: For 290859/290859 co-relation queries the response was YES. [2024-06-14 12:44:40,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42347 conditions, 5644 events. 3684/5644 cut-off events. For 290859/290859 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 30994 event pairs, 931 based on Foata normal form. 2/5645 useless extension candidates. Maximal degree in co-relation 42227. Up to 5528 conditions per place. [2024-06-14 12:44:40,650 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 355 selfloop transitions, 37 changer transitions 0/395 dead transitions. [2024-06-14 12:44:40,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 395 transitions, 5633 flow [2024-06-14 12:44:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:44:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:44:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:44:40,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-14 12:44:40,651 INFO L175 Difference]: Start difference. First operand has 253 places, 365 transitions, 4478 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:44:40,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 395 transitions, 5633 flow [2024-06-14 12:44:41,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 395 transitions, 5409 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-14 12:44:41,471 INFO L231 Difference]: Finished difference. Result has 257 places, 374 transitions, 4554 flow [2024-06-14 12:44:41,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4296, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4554, PETRI_PLACES=257, PETRI_TRANSITIONS=374} [2024-06-14 12:44:41,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-14 12:44:41,472 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 374 transitions, 4554 flow [2024-06-14 12:44:41,472 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 12:44:41,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:41,472 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 12:44:41,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:44:41,472 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:41,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:41,473 INFO L85 PathProgramCache]: Analyzing trace with hash 560995808, now seen corresponding path program 1 times [2024-06-14 12:44:41,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:41,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843613290] [2024-06-14 12:44:41,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:41,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:42,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:42,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843613290] [2024-06-14 12:44:42,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843613290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:42,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:42,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:44:42,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207345578] [2024-06-14 12:44:42,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:42,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:44:42,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:42,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:44:42,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:44:42,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:42,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 374 transitions, 4554 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:42,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:42,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:42,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:43,548 INFO L124 PetriNetUnfolderBase]: 3692/5656 cut-off events. [2024-06-14 12:44:43,548 INFO L125 PetriNetUnfolderBase]: For 301197/301197 co-relation queries the response was YES. [2024-06-14 12:44:43,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42668 conditions, 5656 events. 3692/5656 cut-off events. For 301197/301197 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 31102 event pairs, 935 based on Foata normal form. 2/5657 useless extension candidates. Maximal degree in co-relation 42545. Up to 5603 conditions per place. [2024-06-14 12:44:43,619 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 369 selfloop transitions, 19 changer transitions 0/391 dead transitions. [2024-06-14 12:44:43,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 391 transitions, 5422 flow [2024-06-14 12:44:43,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:44:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:44:43,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-14 12:44:43,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-14 12:44:43,621 INFO L175 Difference]: Start difference. First operand has 257 places, 374 transitions, 4554 flow. Second operand 7 states and 107 transitions. [2024-06-14 12:44:43,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 391 transitions, 5422 flow [2024-06-14 12:44:44,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 391 transitions, 5327 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-14 12:44:44,663 INFO L231 Difference]: Finished difference. Result has 261 places, 376 transitions, 4546 flow [2024-06-14 12:44:44,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4459, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4546, PETRI_PLACES=261, PETRI_TRANSITIONS=376} [2024-06-14 12:44:44,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-14 12:44:44,664 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 376 transitions, 4546 flow [2024-06-14 12:44:44,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:44,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:44,664 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 12:44:44,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:44:44,665 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:44,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2052830324, now seen corresponding path program 3 times [2024-06-14 12:44:44,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:44,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900898230] [2024-06-14 12:44:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:44,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:45,620 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 12:44:45,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:45,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900898230] [2024-06-14 12:44:45,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900898230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:45,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:45,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:44:45,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746893335] [2024-06-14 12:44:45,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:45,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:44:45,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:45,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:44:45,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:44:45,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:45,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 376 transitions, 4546 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 12:44:45,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:45,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:45,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:46,906 INFO L124 PetriNetUnfolderBase]: 3712/5684 cut-off events. [2024-06-14 12:44:46,906 INFO L125 PetriNetUnfolderBase]: For 312928/312928 co-relation queries the response was YES. [2024-06-14 12:44:46,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43150 conditions, 5684 events. 3712/5684 cut-off events. For 312928/312928 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 31204 event pairs, 935 based on Foata normal form. 4/5687 useless extension candidates. Maximal degree in co-relation 43025. Up to 5613 conditions per place. [2024-06-14 12:44:46,966 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 371 selfloop transitions, 25 changer transitions 0/399 dead transitions. [2024-06-14 12:44:46,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 399 transitions, 5523 flow [2024-06-14 12:44:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:44:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:44:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:44:46,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-14 12:44:46,968 INFO L175 Difference]: Start difference. First operand has 261 places, 376 transitions, 4546 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:44:46,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 399 transitions, 5523 flow [2024-06-14 12:44:47,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 399 transitions, 5452 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:44:47,742 INFO L231 Difference]: Finished difference. Result has 264 places, 381 transitions, 4633 flow [2024-06-14 12:44:47,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4475, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4633, PETRI_PLACES=264, PETRI_TRANSITIONS=381} [2024-06-14 12:44:47,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-14 12:44:47,743 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 381 transitions, 4633 flow [2024-06-14 12:44:47,743 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 12:44:47,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:47,743 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 12:44:47,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:44:47,744 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 12:44:47,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:47,744 INFO L85 PathProgramCache]: Analyzing trace with hash -921470514, now seen corresponding path program 2 times [2024-06-14 12:44:47,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:47,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89646907] [2024-06-14 12:44:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:47,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:48,608 INFO 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 12:44:48,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:48,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89646907] [2024-06-14 12:44:48,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89646907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:48,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:48,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:44:48,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962343097] [2024-06-14 12:44:48,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:48,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:44:48,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:48,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:44:48,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:44:48,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:48,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 381 transitions, 4633 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 12:44:48,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:48,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:48,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:49,804 INFO L124 PetriNetUnfolderBase]: 3720/5696 cut-off events. [2024-06-14 12:44:49,805 INFO L125 PetriNetUnfolderBase]: For 320291/320291 co-relation queries the response was YES. [2024-06-14 12:44:49,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43775 conditions, 5696 events. 3720/5696 cut-off events. For 320291/320291 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 31304 event pairs, 945 based on Foata normal form. 2/5697 useless extension candidates. Maximal degree in co-relation 43649. Up to 5653 conditions per place. [2024-06-14 12:44:49,865 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 376 selfloop transitions, 15 changer transitions 0/394 dead transitions. [2024-06-14 12:44:49,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 394 transitions, 5489 flow [2024-06-14 12:44:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:44:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:44:49,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-14 12:44:49,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519163763066202 [2024-06-14 12:44:49,866 INFO L175 Difference]: Start difference. First operand has 264 places, 381 transitions, 4633 flow. Second operand 7 states and 101 transitions. [2024-06-14 12:44:49,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 394 transitions, 5489 flow [2024-06-14 12:44:50,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 394 transitions, 5383 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:44:50,741 INFO L231 Difference]: Finished difference. Result has 265 places, 383 transitions, 4612 flow [2024-06-14 12:44:50,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4527, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4612, PETRI_PLACES=265, PETRI_TRANSITIONS=383} [2024-06-14 12:44:50,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-14 12:44:50,741 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 383 transitions, 4612 flow [2024-06-14 12:44:50,742 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 12:44:50,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:50,742 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 12:44:50,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:44:50,742 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 12:44:50,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:50,742 INFO L85 PathProgramCache]: Analyzing trace with hash 58465964, now seen corresponding path program 3 times [2024-06-14 12:44:50,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:50,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436386313] [2024-06-14 12:44:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:50,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:51,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:51,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436386313] [2024-06-14 12:44:51,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436386313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:51,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:51,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:44:51,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705496248] [2024-06-14 12:44:51,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:51,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:44:51,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:51,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:44:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:44:51,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:51,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 383 transitions, 4612 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:51,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:51,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:51,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:52,787 INFO L124 PetriNetUnfolderBase]: 3728/5708 cut-off events. [2024-06-14 12:44:52,787 INFO L125 PetriNetUnfolderBase]: For 330632/330632 co-relation queries the response was YES. [2024-06-14 12:44:52,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44079 conditions, 5708 events. 3728/5708 cut-off events. For 330632/330632 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 31415 event pairs, 945 based on Foata normal form. 2/5709 useless extension candidates. Maximal degree in co-relation 43952. Up to 5670 conditions per place. [2024-06-14 12:44:52,866 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 379 selfloop transitions, 14 changer transitions 0/396 dead transitions. [2024-06-14 12:44:52,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 396 transitions, 5482 flow [2024-06-14 12:44:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:44:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:44:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-14 12:44:52,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519163763066202 [2024-06-14 12:44:52,868 INFO L175 Difference]: Start difference. First operand has 265 places, 383 transitions, 4612 flow. Second operand 7 states and 101 transitions. [2024-06-14 12:44:52,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 396 transitions, 5482 flow [2024-06-14 12:44:53,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 396 transitions, 5413 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:44:53,774 INFO L231 Difference]: Finished difference. Result has 267 places, 385 transitions, 4630 flow [2024-06-14 12:44:53,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4543, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4630, PETRI_PLACES=267, PETRI_TRANSITIONS=385} [2024-06-14 12:44:53,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-14 12:44:53,775 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 385 transitions, 4630 flow [2024-06-14 12:44:53,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:53,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:53,775 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 12:44:53,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:44:53,775 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 12:44:53,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash -925885816, now seen corresponding path program 4 times [2024-06-14 12:44:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:53,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726434644] [2024-06-14 12:44:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:54,747 INFO 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 12:44:54,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:54,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726434644] [2024-06-14 12:44:54,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726434644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:54,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:54,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:44:54,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348810426] [2024-06-14 12:44:54,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:54,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:44:54,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:54,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:44:54,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:44:54,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:54,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 385 transitions, 4630 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 12:44:54,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:54,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:54,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:55,933 INFO L124 PetriNetUnfolderBase]: 3732/5714 cut-off events. [2024-06-14 12:44:55,934 INFO L125 PetriNetUnfolderBase]: For 340071/340071 co-relation queries the response was YES. [2024-06-14 12:44:55,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44254 conditions, 5714 events. 3732/5714 cut-off events. For 340071/340071 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 31474 event pairs, 942 based on Foata normal form. 4/5717 useless extension candidates. Maximal degree in co-relation 44126. Up to 5658 conditions per place. [2024-06-14 12:44:56,007 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 379 selfloop transitions, 20 changer transitions 0/402 dead transitions. [2024-06-14 12:44:56,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 402 transitions, 5571 flow [2024-06-14 12:44:56,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:44:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:44:56,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-14 12:44:56,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35060975609756095 [2024-06-14 12:44:56,008 INFO L175 Difference]: Start difference. First operand has 267 places, 385 transitions, 4630 flow. Second operand 8 states and 115 transitions. [2024-06-14 12:44:56,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 402 transitions, 5571 flow [2024-06-14 12:44:56,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 402 transitions, 5438 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-14 12:44:56,957 INFO L231 Difference]: Finished difference. Result has 270 places, 388 transitions, 4637 flow [2024-06-14 12:44:56,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4517, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4637, PETRI_PLACES=270, PETRI_TRANSITIONS=388} [2024-06-14 12:44:56,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-14 12:44:56,958 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 388 transitions, 4637 flow [2024-06-14 12:44:56,958 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 12:44:56,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:56,958 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 12:44:56,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:44:56,959 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 12:44:56,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:56,959 INFO L85 PathProgramCache]: Analyzing trace with hash 66739926, now seen corresponding path program 1 times [2024-06-14 12:44:56,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:56,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768586337] [2024-06-14 12:44:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:56,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:57,960 INFO 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 12:44:57,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:57,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768586337] [2024-06-14 12:44:57,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768586337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:57,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:57,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:44:57,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430233825] [2024-06-14 12:44:57,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:57,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:44:57,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:44:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:44:58,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:44:58,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 388 transitions, 4637 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 12:44:58,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:58,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:44:58,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:59,369 INFO L124 PetriNetUnfolderBase]: 3729/5710 cut-off events. [2024-06-14 12:44:59,369 INFO L125 PetriNetUnfolderBase]: For 343281/343281 co-relation queries the response was YES. [2024-06-14 12:44:59,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44533 conditions, 5710 events. 3729/5710 cut-off events. For 343281/343281 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 31425 event pairs, 943 based on Foata normal form. 1/5710 useless extension candidates. Maximal degree in co-relation 44404. Up to 5661 conditions per place. [2024-06-14 12:44:59,430 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 376 selfloop transitions, 23 changer transitions 0/402 dead transitions. [2024-06-14 12:44:59,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 402 transitions, 5541 flow [2024-06-14 12:44:59,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:44:59,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:44:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-14 12:44:59,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588850174216028 [2024-06-14 12:44:59,431 INFO L175 Difference]: Start difference. First operand has 270 places, 388 transitions, 4637 flow. Second operand 7 states and 103 transitions. [2024-06-14 12:44:59,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 402 transitions, 5541 flow [2024-06-14 12:45:00,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 402 transitions, 5437 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:45:00,206 INFO L231 Difference]: Finished difference. Result has 271 places, 391 transitions, 4661 flow [2024-06-14 12:45:00,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4533, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4661, PETRI_PLACES=271, PETRI_TRANSITIONS=391} [2024-06-14 12:45:00,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-14 12:45:00,207 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 391 transitions, 4661 flow [2024-06-14 12:45:00,207 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 12:45:00,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:00,207 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 12:45:00,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:45:00,208 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 12:45:00,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash 66740174, now seen corresponding path program 4 times [2024-06-14 12:45:00,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:00,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078951086] [2024-06-14 12:45:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:00,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:01,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:01,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078951086] [2024-06-14 12:45:01,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078951086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:01,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:01,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:01,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321952302] [2024-06-14 12:45:01,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:01,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:01,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:01,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:01,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:01,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:01,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 391 transitions, 4661 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 12:45:01,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:01,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:01,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:02,614 INFO L124 PetriNetUnfolderBase]: 3724/5703 cut-off events. [2024-06-14 12:45:02,615 INFO L125 PetriNetUnfolderBase]: For 350436/350436 co-relation queries the response was YES. [2024-06-14 12:45:02,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44724 conditions, 5703 events. 3724/5703 cut-off events. For 350436/350436 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 31388 event pairs, 944 based on Foata normal form. 2/5704 useless extension candidates. Maximal degree in co-relation 44594. Up to 5653 conditions per place. [2024-06-14 12:45:02,691 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 380 selfloop transitions, 21 changer transitions 0/404 dead transitions. [2024-06-14 12:45:02,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 404 transitions, 5555 flow [2024-06-14 12:45:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:45:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:45:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-14 12:45:02,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554006968641115 [2024-06-14 12:45:02,692 INFO L175 Difference]: Start difference. First operand has 271 places, 391 transitions, 4661 flow. Second operand 7 states and 102 transitions. [2024-06-14 12:45:02,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 404 transitions, 5555 flow [2024-06-14 12:45:03,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 404 transitions, 5461 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:45:03,644 INFO L231 Difference]: Finished difference. Result has 272 places, 393 transitions, 4679 flow [2024-06-14 12:45:03,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4567, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4679, PETRI_PLACES=272, PETRI_TRANSITIONS=393} [2024-06-14 12:45:03,645 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-14 12:45:03,645 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 393 transitions, 4679 flow [2024-06-14 12:45:03,646 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 12:45:03,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:03,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:03,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:45:03,646 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:03,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:03,646 INFO L85 PathProgramCache]: Analyzing trace with hash 888492865, now seen corresponding path program 1 times [2024-06-14 12:45:03,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:03,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113406341] [2024-06-14 12:45:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:03,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:05,550 INFO 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 12:45:05,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:05,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113406341] [2024-06-14 12:45:05,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113406341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:05,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:05,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 12:45:05,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244960169] [2024-06-14 12:45:05,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:05,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 12:45:05,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:05,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 12:45:05,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-14 12:45:05,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:05,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 393 transitions, 4679 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:05,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:05,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:05,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:07,198 INFO L124 PetriNetUnfolderBase]: 3765/5769 cut-off events. [2024-06-14 12:45:07,198 INFO L125 PetriNetUnfolderBase]: For 366147/366155 co-relation queries the response was YES. [2024-06-14 12:45:07,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45346 conditions, 5769 events. 3765/5769 cut-off events. For 366147/366155 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 31691 event pairs, 609 based on Foata normal form. 20/5788 useless extension candidates. Maximal degree in co-relation 45216. Up to 5500 conditions per place. [2024-06-14 12:45:07,276 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 398 selfloop transitions, 34 changer transitions 0/435 dead transitions. [2024-06-14 12:45:07,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 435 transitions, 5737 flow [2024-06-14 12:45:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:45:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:45:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-14 12:45:07,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853658536585366 [2024-06-14 12:45:07,279 INFO L175 Difference]: Start difference. First operand has 272 places, 393 transitions, 4679 flow. Second operand 10 states and 158 transitions. [2024-06-14 12:45:07,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 435 transitions, 5737 flow [2024-06-14 12:45:08,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 435 transitions, 5645 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 12:45:08,219 INFO L231 Difference]: Finished difference. Result has 278 places, 396 transitions, 4738 flow [2024-06-14 12:45:08,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4587, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4738, PETRI_PLACES=278, PETRI_TRANSITIONS=396} [2024-06-14 12:45:08,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-14 12:45:08,220 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 396 transitions, 4738 flow [2024-06-14 12:45:08,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:08,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:08,221 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 12:45:08,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:45:08,221 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:08,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:08,221 INFO L85 PathProgramCache]: Analyzing trace with hash -291200205, now seen corresponding path program 2 times [2024-06-14 12:45:08,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:08,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535722927] [2024-06-14 12:45:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:08,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:10,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:10,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535722927] [2024-06-14 12:45:10,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535722927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:10,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:10,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 12:45:10,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703014181] [2024-06-14 12:45:10,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:10,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 12:45:10,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:10,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 12:45:10,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-14 12:45:10,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:10,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 396 transitions, 4738 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:10,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:10,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:10,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:12,102 INFO L124 PetriNetUnfolderBase]: 3806/5840 cut-off events. [2024-06-14 12:45:12,102 INFO L125 PetriNetUnfolderBase]: For 367987/367995 co-relation queries the response was YES. [2024-06-14 12:45:12,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45959 conditions, 5840 events. 3806/5840 cut-off events. For 367987/367995 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 32380 event pairs, 701 based on Foata normal form. 20/5859 useless extension candidates. Maximal degree in co-relation 45827. Up to 5543 conditions per place. [2024-06-14 12:45:12,168 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 391 selfloop transitions, 44 changer transitions 0/438 dead transitions. [2024-06-14 12:45:12,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 438 transitions, 5808 flow [2024-06-14 12:45:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:45:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:45:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-14 12:45:12,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878048780487805 [2024-06-14 12:45:12,169 INFO L175 Difference]: Start difference. First operand has 278 places, 396 transitions, 4738 flow. Second operand 10 states and 159 transitions. [2024-06-14 12:45:12,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 438 transitions, 5808 flow [2024-06-14 12:45:13,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 438 transitions, 5692 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 12:45:13,065 INFO L231 Difference]: Finished difference. Result has 282 places, 399 transitions, 4797 flow [2024-06-14 12:45:13,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4622, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4797, PETRI_PLACES=282, PETRI_TRANSITIONS=399} [2024-06-14 12:45:13,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-14 12:45:13,065 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 399 transitions, 4797 flow [2024-06-14 12:45:13,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:13,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:13,066 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 12:45:13,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:45:13,066 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:13,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:13,066 INFO L85 PathProgramCache]: Analyzing trace with hash -287625285, now seen corresponding path program 3 times [2024-06-14 12:45:13,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:13,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58934468] [2024-06-14 12:45:13,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:13,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:14,813 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 12:45:14,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:14,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58934468] [2024-06-14 12:45:14,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58934468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:14,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:14,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 12:45:14,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036391064] [2024-06-14 12:45:14,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:14,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 12:45:14,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:14,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 12:45:14,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-14 12:45:14,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:14,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 399 transitions, 4797 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:14,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:14,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:14,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:16,359 INFO L124 PetriNetUnfolderBase]: 3864/5938 cut-off events. [2024-06-14 12:45:16,359 INFO L125 PetriNetUnfolderBase]: For 384997/385005 co-relation queries the response was YES. [2024-06-14 12:45:16,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46699 conditions, 5938 events. 3864/5938 cut-off events. For 384997/385005 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 33119 event pairs, 716 based on Foata normal form. 20/5957 useless extension candidates. Maximal degree in co-relation 46565. Up to 5503 conditions per place. [2024-06-14 12:45:16,439 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 376 selfloop transitions, 63 changer transitions 0/442 dead transitions. [2024-06-14 12:45:16,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 442 transitions, 5885 flow [2024-06-14 12:45:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:45:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:45:16,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 12:45:16,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-14 12:45:16,441 INFO L175 Difference]: Start difference. First operand has 282 places, 399 transitions, 4797 flow. Second operand 10 states and 162 transitions. [2024-06-14 12:45:16,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 442 transitions, 5885 flow [2024-06-14 12:45:17,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 442 transitions, 5745 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 12:45:17,433 INFO L231 Difference]: Finished difference. Result has 286 places, 403 transitions, 4886 flow [2024-06-14 12:45:17,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4657, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4886, PETRI_PLACES=286, PETRI_TRANSITIONS=403} [2024-06-14 12:45:17,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-14 12:45:17,433 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 403 transitions, 4886 flow [2024-06-14 12:45:17,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:17,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:17,434 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 12:45:17,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:45:17,434 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:17,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash -287475338, now seen corresponding path program 1 times [2024-06-14 12:45:17,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:17,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835163688] [2024-06-14 12:45:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:17,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:19,185 INFO 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 12:45:19,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:19,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835163688] [2024-06-14 12:45:19,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835163688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:19,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:19,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 12:45:19,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365184057] [2024-06-14 12:45:19,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:19,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 12:45:19,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:19,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 12:45:19,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-14 12:45:19,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:19,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 403 transitions, 4886 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:19,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:19,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:19,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:21,051 INFO L124 PetriNetUnfolderBase]: 3897/5997 cut-off events. [2024-06-14 12:45:21,052 INFO L125 PetriNetUnfolderBase]: For 399288/399296 co-relation queries the response was YES. [2024-06-14 12:45:21,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47083 conditions, 5997 events. 3897/5997 cut-off events. For 399288/399296 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33566 event pairs, 743 based on Foata normal form. 24/6020 useless extension candidates. Maximal degree in co-relation 46947. Up to 5419 conditions per place. [2024-06-14 12:45:21,127 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 367 selfloop transitions, 75 changer transitions 0/445 dead transitions. [2024-06-14 12:45:21,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 445 transitions, 5990 flow [2024-06-14 12:45:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:45:21,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:45:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 12:45:21,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 12:45:21,129 INFO L175 Difference]: Start difference. First operand has 286 places, 403 transitions, 4886 flow. Second operand 10 states and 164 transitions. [2024-06-14 12:45:21,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 445 transitions, 5990 flow [2024-06-14 12:45:22,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 445 transitions, 5808 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 12:45:22,206 INFO L231 Difference]: Finished difference. Result has 289 places, 404 transitions, 4930 flow [2024-06-14 12:45:22,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4704, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4930, PETRI_PLACES=289, PETRI_TRANSITIONS=404} [2024-06-14 12:45:22,206 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-14 12:45:22,207 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 404 transitions, 4930 flow [2024-06-14 12:45:22,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:22,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:22,207 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 12:45:22,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:45:22,207 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 12:45:22,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1197847869, now seen corresponding path program 4 times [2024-06-14 12:45:22,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:22,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859854778] [2024-06-14 12:45:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:22,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:24,226 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 12:45:24,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:24,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859854778] [2024-06-14 12:45:24,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859854778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:24,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:24,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 12:45:24,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412435952] [2024-06-14 12:45:24,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:24,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 12:45:24,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:24,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 12:45:24,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-14 12:45:24,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:24,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 404 transitions, 4930 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:24,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:24,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:24,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:25,873 INFO L124 PetriNetUnfolderBase]: 3938/6068 cut-off events. [2024-06-14 12:45:25,873 INFO L125 PetriNetUnfolderBase]: For 403530/403538 co-relation queries the response was YES. [2024-06-14 12:45:25,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47648 conditions, 6068 events. 3938/6068 cut-off events. For 403530/403538 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 34129 event pairs, 747 based on Foata normal form. 20/6087 useless extension candidates. Maximal degree in co-relation 47511. Up to 5689 conditions per place. [2024-06-14 12:45:25,958 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 378 selfloop transitions, 64 changer transitions 0/445 dead transitions. [2024-06-14 12:45:25,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 445 transitions, 6011 flow [2024-06-14 12:45:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:45:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:45:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-14 12:45:25,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926829268292683 [2024-06-14 12:45:25,960 INFO L175 Difference]: Start difference. First operand has 289 places, 404 transitions, 4930 flow. Second operand 10 states and 161 transitions. [2024-06-14 12:45:25,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 445 transitions, 6011 flow [2024-06-14 12:45:26,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 445 transitions, 5835 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 12:45:26,857 INFO L231 Difference]: Finished difference. Result has 292 places, 406 transitions, 4965 flow [2024-06-14 12:45:26,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4754, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4965, PETRI_PLACES=292, PETRI_TRANSITIONS=406} [2024-06-14 12:45:26,857 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-14 12:45:26,857 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 406 transitions, 4965 flow [2024-06-14 12:45:26,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:26,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:26,858 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 12:45:26,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:45:26,858 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:26,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:26,858 INFO L85 PathProgramCache]: Analyzing trace with hash -617316982, now seen corresponding path program 1 times [2024-06-14 12:45:26,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:26,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610767762] [2024-06-14 12:45:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:26,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:27,647 INFO 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 12:45:27,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:27,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610767762] [2024-06-14 12:45:27,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610767762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:27,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:27,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:27,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911168244] [2024-06-14 12:45:27,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:27,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:27,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:27,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:27,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:27,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:27,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 406 transitions, 4965 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 12:45:27,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:27,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:27,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:29,123 INFO L124 PetriNetUnfolderBase]: 3995/6150 cut-off events. [2024-06-14 12:45:29,123 INFO L125 PetriNetUnfolderBase]: For 414775/414787 co-relation queries the response was YES. [2024-06-14 12:45:29,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48537 conditions, 6150 events. 3995/6150 cut-off events. For 414775/414787 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 34667 event pairs, 771 based on Foata normal form. 16/6165 useless extension candidates. Maximal degree in co-relation 48398. Up to 5915 conditions per place. [2024-06-14 12:45:29,209 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 382 selfloop transitions, 59 changer transitions 0/444 dead transitions. [2024-06-14 12:45:29,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 444 transitions, 6266 flow [2024-06-14 12:45:29,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:45:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:45:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:45:29,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:45:29,211 INFO L175 Difference]: Start difference. First operand has 292 places, 406 transitions, 4965 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:45:29,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 444 transitions, 6266 flow [2024-06-14 12:45:30,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 444 transitions, 6096 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 12:45:30,315 INFO L231 Difference]: Finished difference. Result has 295 places, 417 transitions, 5130 flow [2024-06-14 12:45:30,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4795, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5130, PETRI_PLACES=295, PETRI_TRANSITIONS=417} [2024-06-14 12:45:30,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-14 12:45:30,316 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 417 transitions, 5130 flow [2024-06-14 12:45:30,316 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 12:45:30,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:30,316 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 12:45:30,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:45:30,317 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:30,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:30,317 INFO L85 PathProgramCache]: Analyzing trace with hash -305888812, now seen corresponding path program 2 times [2024-06-14 12:45:30,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:30,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593158719] [2024-06-14 12:45:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:30,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:31,073 INFO 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 12:45:31,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:31,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593158719] [2024-06-14 12:45:31,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593158719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:31,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:31,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:31,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175317802] [2024-06-14 12:45:31,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:31,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:31,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:31,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:31,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:31,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:31,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 417 transitions, 5130 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 12:45:31,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:31,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:31,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:32,551 INFO L124 PetriNetUnfolderBase]: 4015/6178 cut-off events. [2024-06-14 12:45:32,551 INFO L125 PetriNetUnfolderBase]: For 426645/426657 co-relation queries the response was YES. [2024-06-14 12:45:32,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49595 conditions, 6178 events. 4015/6178 cut-off events. For 426645/426657 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 34795 event pairs, 813 based on Foata normal form. 16/6193 useless extension candidates. Maximal degree in co-relation 49454. Up to 6011 conditions per place. [2024-06-14 12:45:32,637 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 388 selfloop transitions, 52 changer transitions 0/443 dead transitions. [2024-06-14 12:45:32,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 443 transitions, 6200 flow [2024-06-14 12:45:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:45:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:45:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 12:45:32,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-14 12:45:32,638 INFO L175 Difference]: Start difference. First operand has 295 places, 417 transitions, 5130 flow. Second operand 9 states and 137 transitions. [2024-06-14 12:45:32,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 443 transitions, 6200 flow [2024-06-14 12:45:33,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 443 transitions, 6040 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-14 12:45:33,962 INFO L231 Difference]: Finished difference. Result has 301 places, 422 transitions, 5192 flow [2024-06-14 12:45:33,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4996, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5192, PETRI_PLACES=301, PETRI_TRANSITIONS=422} [2024-06-14 12:45:33,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-14 12:45:33,963 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 422 transitions, 5192 flow [2024-06-14 12:45:33,963 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 12:45:33,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:33,963 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 12:45:33,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:45:33,963 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:33,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:33,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1716810270, now seen corresponding path program 1 times [2024-06-14 12:45:33,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:33,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482244905] [2024-06-14 12:45:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:33,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:35,012 INFO 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 12:45:35,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:35,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482244905] [2024-06-14 12:45:35,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482244905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:35,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:35,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:35,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840891026] [2024-06-14 12:45:35,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:35,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:35,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:35,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:35,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 422 transitions, 5192 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 12:45:35,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:35,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:35,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:36,418 INFO L124 PetriNetUnfolderBase]: 4041/6211 cut-off events. [2024-06-14 12:45:36,418 INFO L125 PetriNetUnfolderBase]: For 435740/435748 co-relation queries the response was YES. [2024-06-14 12:45:36,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50115 conditions, 6211 events. 4041/6211 cut-off events. For 435740/435748 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34995 event pairs, 785 based on Foata normal form. 10/6220 useless extension candidates. Maximal degree in co-relation 49972. Up to 6022 conditions per place. [2024-06-14 12:45:36,500 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 65 changer transitions 0/449 dead transitions. [2024-06-14 12:45:36,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 449 transitions, 6457 flow [2024-06-14 12:45:36,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:45:36,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:45:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:45:36,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:45:36,502 INFO L175 Difference]: Start difference. First operand has 301 places, 422 transitions, 5192 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:45:36,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 449 transitions, 6457 flow [2024-06-14 12:45:37,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 449 transitions, 6299 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:45:37,668 INFO L231 Difference]: Finished difference. Result has 304 places, 429 transitions, 5374 flow [2024-06-14 12:45:37,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5034, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5374, PETRI_PLACES=304, PETRI_TRANSITIONS=429} [2024-06-14 12:45:37,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-14 12:45:37,668 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 429 transitions, 5374 flow [2024-06-14 12:45:37,669 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 12:45:37,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:37,669 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 12:45:37,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:45:37,669 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:37,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:37,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1987037686, now seen corresponding path program 3 times [2024-06-14 12:45:37,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:37,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666903968] [2024-06-14 12:45:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:37,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:38,417 INFO 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 12:45:38,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:38,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666903968] [2024-06-14 12:45:38,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666903968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:38,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:38,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:38,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120312207] [2024-06-14 12:45:38,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:38,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:38,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:38,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:38,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:38,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 429 transitions, 5374 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 12:45:38,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:38,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:38,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:39,886 INFO L124 PetriNetUnfolderBase]: 4147/6365 cut-off events. [2024-06-14 12:45:39,887 INFO L125 PetriNetUnfolderBase]: For 476416/476420 co-relation queries the response was YES. [2024-06-14 12:45:39,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52524 conditions, 6365 events. 4147/6365 cut-off events. For 476416/476420 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 35950 event pairs, 749 based on Foata normal form. 8/6372 useless extension candidates. Maximal degree in co-relation 52379. Up to 5929 conditions per place. [2024-06-14 12:45:39,971 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 91 changer transitions 0/468 dead transitions. [2024-06-14 12:45:39,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 468 transitions, 7004 flow [2024-06-14 12:45:39,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:45:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:45:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:45:39,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:45:39,973 INFO L175 Difference]: Start difference. First operand has 304 places, 429 transitions, 5374 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:45:39,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 468 transitions, 7004 flow [2024-06-14 12:45:41,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 468 transitions, 6848 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 12:45:41,652 INFO L231 Difference]: Finished difference. Result has 308 places, 442 transitions, 5814 flow [2024-06-14 12:45:41,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5222, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5814, PETRI_PLACES=308, PETRI_TRANSITIONS=442} [2024-06-14 12:45:41,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-14 12:45:41,653 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 442 transitions, 5814 flow [2024-06-14 12:45:41,653 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 12:45:41,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:41,653 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 12:45:41,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:45:41,653 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 12:45:41,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:41,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1987026526, now seen corresponding path program 4 times [2024-06-14 12:45:41,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:41,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032728518] [2024-06-14 12:45:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:41,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:42,376 INFO 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 12:45:42,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:42,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032728518] [2024-06-14 12:45:42,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032728518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:42,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:42,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:42,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503162665] [2024-06-14 12:45:42,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:42,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:42,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:42,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:42,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:42,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:42,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 442 transitions, 5814 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 12:45:42,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:42,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:42,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:43,870 INFO L124 PetriNetUnfolderBase]: 4183/6415 cut-off events. [2024-06-14 12:45:43,870 INFO L125 PetriNetUnfolderBase]: For 488921/488925 co-relation queries the response was YES. [2024-06-14 12:45:43,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54182 conditions, 6415 events. 4183/6415 cut-off events. For 488921/488925 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36219 event pairs, 747 based on Foata normal form. 8/6422 useless extension candidates. Maximal degree in co-relation 54035. Up to 5960 conditions per place. [2024-06-14 12:45:43,960 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 368 selfloop transitions, 100 changer transitions 0/471 dead transitions. [2024-06-14 12:45:43,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 471 transitions, 7320 flow [2024-06-14 12:45:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:45:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:45:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:45:43,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 12:45:43,962 INFO L175 Difference]: Start difference. First operand has 308 places, 442 transitions, 5814 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:45:43,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 471 transitions, 7320 flow [2024-06-14 12:45:45,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 471 transitions, 7123 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-14 12:45:45,567 INFO L231 Difference]: Finished difference. Result has 313 places, 448 transitions, 6021 flow [2024-06-14 12:45:45,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5647, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6021, PETRI_PLACES=313, PETRI_TRANSITIONS=448} [2024-06-14 12:45:45,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-14 12:45:45,571 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 448 transitions, 6021 flow [2024-06-14 12:45:45,571 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 12:45:45,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:45,571 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 12:45:45,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:45:45,571 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:45,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:45,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1987026340, now seen corresponding path program 2 times [2024-06-14 12:45:45,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:45,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515334764] [2024-06-14 12:45:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:45,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:46,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:46,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515334764] [2024-06-14 12:45:46,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515334764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:46,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:46,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:46,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455163745] [2024-06-14 12:45:46,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:46,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:46,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:46,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:46,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:46,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:46,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 448 transitions, 6021 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 12:45:46,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:46,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:46,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:48,333 INFO L124 PetriNetUnfolderBase]: 4193/6423 cut-off events. [2024-06-14 12:45:48,334 INFO L125 PetriNetUnfolderBase]: For 489389/489397 co-relation queries the response was YES. [2024-06-14 12:45:48,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54155 conditions, 6423 events. 4193/6423 cut-off events. For 489389/489397 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 36260 event pairs, 807 based on Foata normal form. 10/6432 useless extension candidates. Maximal degree in co-relation 54006. Up to 6297 conditions per place. [2024-06-14 12:45:48,412 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 414 selfloop transitions, 50 changer transitions 0/467 dead transitions. [2024-06-14 12:45:48,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 467 transitions, 7080 flow [2024-06-14 12:45:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:45:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:45:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:45:48,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:45:48,414 INFO L175 Difference]: Start difference. First operand has 313 places, 448 transitions, 6021 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:45:48,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 467 transitions, 7080 flow [2024-06-14 12:45:49,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 467 transitions, 6904 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 12:45:49,734 INFO L231 Difference]: Finished difference. Result has 317 places, 451 transitions, 6026 flow [2024-06-14 12:45:49,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5845, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6026, PETRI_PLACES=317, PETRI_TRANSITIONS=451} [2024-06-14 12:45:49,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-14 12:45:49,735 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 451 transitions, 6026 flow [2024-06-14 12:45:49,735 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 12:45:49,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:49,735 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 12:45:49,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:45:49,735 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 12:45:49,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:49,736 INFO L85 PathProgramCache]: Analyzing trace with hash 384972475, now seen corresponding path program 1 times [2024-06-14 12:45:49,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:49,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934952488] [2024-06-14 12:45:49,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:49,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:50,639 INFO 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 12:45:50,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:50,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934952488] [2024-06-14 12:45:50,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934952488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:50,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:50,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:50,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782635751] [2024-06-14 12:45:50,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:50,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:50,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:50,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:50,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:50,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:50,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 451 transitions, 6026 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 12:45:50,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:50,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:50,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:52,205 INFO L124 PetriNetUnfolderBase]: 4190/6419 cut-off events. [2024-06-14 12:45:52,205 INFO L125 PetriNetUnfolderBase]: For 496653/496661 co-relation queries the response was YES. [2024-06-14 12:45:52,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53887 conditions, 6419 events. 4190/6419 cut-off events. For 496653/496661 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 36278 event pairs, 828 based on Foata normal form. 9/6427 useless extension candidates. Maximal degree in co-relation 53737. Up to 6345 conditions per place. [2024-06-14 12:45:52,287 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 423 selfloop transitions, 36 changer transitions 0/462 dead transitions. [2024-06-14 12:45:52,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 462 transitions, 7046 flow [2024-06-14 12:45:52,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:45:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:45:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-14 12:45:52,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-14 12:45:52,288 INFO L175 Difference]: Start difference. First operand has 317 places, 451 transitions, 6026 flow. Second operand 6 states and 94 transitions. [2024-06-14 12:45:52,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 462 transitions, 7046 flow [2024-06-14 12:45:53,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 462 transitions, 6904 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 12:45:53,748 INFO L231 Difference]: Finished difference. Result has 316 places, 453 transitions, 6048 flow [2024-06-14 12:45:53,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5884, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6048, PETRI_PLACES=316, PETRI_TRANSITIONS=453} [2024-06-14 12:45:53,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-14 12:45:53,749 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 453 transitions, 6048 flow [2024-06-14 12:45:53,749 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 12:45:53,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:53,749 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 12:45:53,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:45:53,750 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:53,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:53,750 INFO L85 PathProgramCache]: Analyzing trace with hash -478072420, now seen corresponding path program 5 times [2024-06-14 12:45:53,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:53,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893029503] [2024-06-14 12:45:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:53,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:54,478 INFO 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 12:45:54,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:54,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893029503] [2024-06-14 12:45:54,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893029503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:54,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:54,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:54,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411225484] [2024-06-14 12:45:54,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:54,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:54,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:54,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:54,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:54,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:54,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 453 transitions, 6048 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 12:45:54,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:54,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:54,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:56,103 INFO L124 PetriNetUnfolderBase]: 4178/6409 cut-off events. [2024-06-14 12:45:56,103 INFO L125 PetriNetUnfolderBase]: For 493950/493954 co-relation queries the response was YES. [2024-06-14 12:45:56,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53388 conditions, 6409 events. 4178/6409 cut-off events. For 493950/493954 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36226 event pairs, 837 based on Foata normal form. 8/6416 useless extension candidates. Maximal degree in co-relation 53238. Up to 6155 conditions per place. [2024-06-14 12:45:56,197 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 404 selfloop transitions, 62 changer transitions 0/469 dead transitions. [2024-06-14 12:45:56,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 469 transitions, 7192 flow [2024-06-14 12:45:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:45:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:45:56,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:45:56,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 12:45:56,198 INFO L175 Difference]: Start difference. First operand has 316 places, 453 transitions, 6048 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:45:56,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 469 transitions, 7192 flow [2024-06-14 12:45:57,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 469 transitions, 7008 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-14 12:45:57,836 INFO L231 Difference]: Finished difference. Result has 318 places, 453 transitions, 5997 flow [2024-06-14 12:45:57,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5866, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5997, PETRI_PLACES=318, PETRI_TRANSITIONS=453} [2024-06-14 12:45:57,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-14 12:45:57,837 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 453 transitions, 5997 flow [2024-06-14 12:45:57,837 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 12:45:57,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:57,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:57,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:45:57,838 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 12:45:57,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1711096350, now seen corresponding path program 3 times [2024-06-14 12:45:57,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:57,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452161203] [2024-06-14 12:45:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:57,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:58,798 INFO 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 12:45:58,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:58,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452161203] [2024-06-14 12:45:58,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452161203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:58,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:58,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:58,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306137774] [2024-06-14 12:45:58,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:58,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:58,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:58,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:58,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:58,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:45:58,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 453 transitions, 5997 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 12:45:58,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:58,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:45:58,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:00,394 INFO L124 PetriNetUnfolderBase]: 4172/6395 cut-off events. [2024-06-14 12:46:00,394 INFO L125 PetriNetUnfolderBase]: For 483744/483752 co-relation queries the response was YES. [2024-06-14 12:46:00,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53098 conditions, 6395 events. 4172/6395 cut-off events. For 483744/483752 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36165 event pairs, 819 based on Foata normal form. 10/6404 useless extension candidates. Maximal degree in co-relation 52948. Up to 6317 conditions per place. [2024-06-14 12:46:00,501 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 32 changer transitions 0/464 dead transitions. [2024-06-14 12:46:00,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 464 transitions, 6963 flow [2024-06-14 12:46:00,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:00,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-14 12:46:00,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693379790940767 [2024-06-14 12:46:00,502 INFO L175 Difference]: Start difference. First operand has 318 places, 453 transitions, 5997 flow. Second operand 7 states and 106 transitions. [2024-06-14 12:46:00,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 464 transitions, 6963 flow [2024-06-14 12:46:02,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 464 transitions, 6823 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:02,159 INFO L231 Difference]: Finished difference. Result has 321 places, 453 transitions, 5931 flow [2024-06-14 12:46:02,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5857, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5931, PETRI_PLACES=321, PETRI_TRANSITIONS=453} [2024-06-14 12:46:02,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-14 12:46:02,160 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 453 transitions, 5931 flow [2024-06-14 12:46:02,160 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 12:46:02,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:02,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:02,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:46:02,161 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 12:46:02,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:02,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1780493056, now seen corresponding path program 6 times [2024-06-14 12:46:02,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:02,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992936098] [2024-06-14 12:46:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:02,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:02,870 INFO 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 12:46:02,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:02,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992936098] [2024-06-14 12:46:02,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992936098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:02,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:02,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:02,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705668199] [2024-06-14 12:46:02,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:02,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:02,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:02,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:02,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:02,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:46:02,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 453 transitions, 5931 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 12:46:02,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:02,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:46:02,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:04,296 INFO L124 PetriNetUnfolderBase]: 4160/6385 cut-off events. [2024-06-14 12:46:04,296 INFO L125 PetriNetUnfolderBase]: For 490944/490948 co-relation queries the response was YES. [2024-06-14 12:46:04,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52655 conditions, 6385 events. 4160/6385 cut-off events. For 490944/490948 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 36115 event pairs, 846 based on Foata normal form. 8/6392 useless extension candidates. Maximal degree in co-relation 52504. Up to 6213 conditions per place. [2024-06-14 12:46:04,384 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 418 selfloop transitions, 45 changer transitions 0/466 dead transitions. [2024-06-14 12:46:04,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 466 transitions, 6913 flow [2024-06-14 12:46:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 12:46:04,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-14 12:46:04,385 INFO L175 Difference]: Start difference. First operand has 321 places, 453 transitions, 5931 flow. Second operand 7 states and 110 transitions. [2024-06-14 12:46:04,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 466 transitions, 6913 flow [2024-06-14 12:46:05,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 466 transitions, 6797 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:05,927 INFO L231 Difference]: Finished difference. Result has 323 places, 453 transitions, 5911 flow [2024-06-14 12:46:05,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5815, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5911, PETRI_PLACES=323, PETRI_TRANSITIONS=453} [2024-06-14 12:46:05,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-14 12:46:05,928 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 453 transitions, 5911 flow [2024-06-14 12:46:05,928 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 12:46:05,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:05,928 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 12:46:05,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:46:05,929 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:05,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:05,929 INFO L85 PathProgramCache]: Analyzing trace with hash -115029353, now seen corresponding path program 5 times [2024-06-14 12:46:05,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:05,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308840535] [2024-06-14 12:46:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:05,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:07,880 INFO 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 12:46:07,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:07,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308840535] [2024-06-14 12:46:07,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308840535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:07,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:07,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 12:46:07,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792051487] [2024-06-14 12:46:07,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:07,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 12:46:07,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:07,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 12:46:07,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-14 12:46:08,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:46:08,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 453 transitions, 5911 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:08,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:08,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:46:08,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:09,699 INFO L124 PetriNetUnfolderBase]: 4201/6450 cut-off events. [2024-06-14 12:46:09,700 INFO L125 PetriNetUnfolderBase]: For 515455/515463 co-relation queries the response was YES. [2024-06-14 12:46:09,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53338 conditions, 6450 events. 4201/6450 cut-off events. For 515455/515463 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 36666 event pairs, 772 based on Foata normal form. 20/6469 useless extension candidates. Maximal degree in co-relation 53186. Up to 5743 conditions per place. [2024-06-14 12:46:09,781 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 110 changer transitions 0/493 dead transitions. [2024-06-14 12:46:09,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 493 transitions, 7131 flow [2024-06-14 12:46:09,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:46:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:46:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-14 12:46:09,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:46:09,783 INFO L175 Difference]: Start difference. First operand has 323 places, 453 transitions, 5911 flow. Second operand 10 states and 160 transitions. [2024-06-14 12:46:09,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 493 transitions, 7131 flow [2024-06-14 12:46:10,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 493 transitions, 7019 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:46:10,791 INFO L231 Difference]: Finished difference. Result has 328 places, 457 transitions, 6177 flow [2024-06-14 12:46:10,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5799, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6177, PETRI_PLACES=328, PETRI_TRANSITIONS=457} [2024-06-14 12:46:10,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-14 12:46:10,792 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 457 transitions, 6177 flow [2024-06-14 12:46:10,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:10,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:10,793 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 12:46:10,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:46:10,794 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:10,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:10,794 INFO L85 PathProgramCache]: Analyzing trace with hash 84416587, now seen corresponding path program 6 times [2024-06-14 12:46:10,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:10,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109572184] [2024-06-14 12:46:10,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:10,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:12,552 INFO 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 12:46:12,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:12,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109572184] [2024-06-14 12:46:12,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109572184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:12,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:12,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 12:46:12,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908351341] [2024-06-14 12:46:12,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:12,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 12:46:12,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:12,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 12:46:12,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-14 12:46:12,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:46:12,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 457 transitions, 6177 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:12,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:12,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:46:12,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:14,220 INFO L124 PetriNetUnfolderBase]: 4181/6418 cut-off events. [2024-06-14 12:46:14,221 INFO L125 PetriNetUnfolderBase]: For 512277/512285 co-relation queries the response was YES. [2024-06-14 12:46:14,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53138 conditions, 6418 events. 4181/6418 cut-off events. For 512277/512285 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 36474 event pairs, 710 based on Foata normal form. 20/6437 useless extension candidates. Maximal degree in co-relation 52984. Up to 5429 conditions per place. [2024-06-14 12:46:14,324 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 365 selfloop transitions, 131 changer transitions 0/499 dead transitions. [2024-06-14 12:46:14,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 499 transitions, 7379 flow [2024-06-14 12:46:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:46:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:46:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 12:46:14,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-14 12:46:14,326 INFO L175 Difference]: Start difference. First operand has 328 places, 457 transitions, 6177 flow. Second operand 10 states and 168 transitions. [2024-06-14 12:46:14,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 499 transitions, 7379 flow [2024-06-14 12:46:15,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 499 transitions, 6985 flow, removed 128 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:15,928 INFO L231 Difference]: Finished difference. Result has 333 places, 457 transitions, 6052 flow [2024-06-14 12:46:15,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5783, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6052, PETRI_PLACES=333, PETRI_TRANSITIONS=457} [2024-06-14 12:46:15,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-14 12:46:15,928 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 457 transitions, 6052 flow [2024-06-14 12:46:15,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:15,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:15,929 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 12:46:15,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:46:15,929 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:15,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:15,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1569707325, now seen corresponding path program 7 times [2024-06-14 12:46:15,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:15,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511107090] [2024-06-14 12:46:15,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:15,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:17,530 INFO 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 12:46:17,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:17,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511107090] [2024-06-14 12:46:17,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511107090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:17,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:17,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 12:46:17,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504947366] [2024-06-14 12:46:17,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:17,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 12:46:17,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:17,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 12:46:17,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-14 12:46:17,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:46:17,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 457 transitions, 6052 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:17,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:17,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:46:17,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:19,316 INFO L124 PetriNetUnfolderBase]: 4239/6522 cut-off events. [2024-06-14 12:46:19,317 INFO L125 PetriNetUnfolderBase]: For 521148/521152 co-relation queries the response was YES. [2024-06-14 12:46:19,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53285 conditions, 6522 events. 4239/6522 cut-off events. For 521148/521152 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 37275 event pairs, 769 based on Foata normal form. 16/6537 useless extension candidates. Maximal degree in co-relation 53130. Up to 6139 conditions per place. [2024-06-14 12:46:19,403 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 433 selfloop transitions, 62 changer transitions 0/498 dead transitions. [2024-06-14 12:46:19,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 498 transitions, 7252 flow [2024-06-14 12:46:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:46:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:46:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 12:46:19,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-14 12:46:19,405 INFO L175 Difference]: Start difference. First operand has 333 places, 457 transitions, 6052 flow. Second operand 10 states and 162 transitions. [2024-06-14 12:46:19,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 498 transitions, 7252 flow [2024-06-14 12:46:20,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 498 transitions, 6881 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-14 12:46:20,703 INFO L231 Difference]: Finished difference. Result has 335 places, 460 transitions, 5894 flow [2024-06-14 12:46:20,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5894, PETRI_PLACES=335, PETRI_TRANSITIONS=460} [2024-06-14 12:46:20,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-14 12:46:20,703 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 460 transitions, 5894 flow [2024-06-14 12:46:20,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:20,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:20,704 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 12:46:20,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:46:20,704 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 12:46:20,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:20,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1569563175, now seen corresponding path program 8 times [2024-06-14 12:46:20,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:20,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070144678] [2024-06-14 12:46:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:20,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:22,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:22,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070144678] [2024-06-14 12:46:22,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070144678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:22,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:22,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 12:46:22,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600316997] [2024-06-14 12:46:22,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:22,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 12:46:22,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:22,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 12:46:22,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-14 12:46:22,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:46:22,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 460 transitions, 5894 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:22,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:22,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:46:22,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:24,200 INFO L124 PetriNetUnfolderBase]: 4280/6593 cut-off events. [2024-06-14 12:46:24,200 INFO L125 PetriNetUnfolderBase]: For 498549/498553 co-relation queries the response was YES. [2024-06-14 12:46:24,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52798 conditions, 6593 events. 4280/6593 cut-off events. For 498549/498553 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37814 event pairs, 774 based on Foata normal form. 16/6608 useless extension candidates. Maximal degree in co-relation 52641. Up to 6169 conditions per place. [2024-06-14 12:46:24,293 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 433 selfloop transitions, 65 changer transitions 0/501 dead transitions. [2024-06-14 12:46:24,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 501 transitions, 7116 flow [2024-06-14 12:46:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:46:24,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:46:24,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-14 12:46:24,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975609756097561 [2024-06-14 12:46:24,295 INFO L175 Difference]: Start difference. First operand has 335 places, 460 transitions, 5894 flow. Second operand 10 states and 163 transitions. [2024-06-14 12:46:24,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 501 transitions, 7116 flow [2024-06-14 12:46:25,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 501 transitions, 6945 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 12:46:25,688 INFO L231 Difference]: Finished difference. Result has 339 places, 463 transitions, 5963 flow [2024-06-14 12:46:25,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5723, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5963, PETRI_PLACES=339, PETRI_TRANSITIONS=463} [2024-06-14 12:46:25,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-14 12:46:25,689 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 463 transitions, 5963 flow [2024-06-14 12:46:25,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:25,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:25,690 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 12:46:25,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:46:25,690 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 12:46:25,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:25,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1115412307, now seen corresponding path program 9 times [2024-06-14 12:46:25,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:25,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494700226] [2024-06-14 12:46:25,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:25,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:27,339 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 12:46:27,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:27,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494700226] [2024-06-14 12:46:27,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494700226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:27,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:27,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 12:46:27,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124567692] [2024-06-14 12:46:27,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:27,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 12:46:27,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:27,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 12:46:27,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-14 12:46:27,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:46:27,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 463 transitions, 5963 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:27,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:27,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:46:27,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:28,980 INFO L124 PetriNetUnfolderBase]: 4260/6561 cut-off events. [2024-06-14 12:46:28,980 INFO L125 PetriNetUnfolderBase]: For 487393/487397 co-relation queries the response was YES. [2024-06-14 12:46:29,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51864 conditions, 6561 events. 4260/6561 cut-off events. For 487393/487397 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37583 event pairs, 760 based on Foata normal form. 16/6576 useless extension candidates. Maximal degree in co-relation 51705. Up to 6183 conditions per place. [2024-06-14 12:46:29,075 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 439 selfloop transitions, 60 changer transitions 0/502 dead transitions. [2024-06-14 12:46:29,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 502 transitions, 7037 flow [2024-06-14 12:46:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:46:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:46:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-14 12:46:29,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878048780487805 [2024-06-14 12:46:29,077 INFO L175 Difference]: Start difference. First operand has 339 places, 463 transitions, 5963 flow. Second operand 10 states and 159 transitions. [2024-06-14 12:46:29,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 502 transitions, 7037 flow [2024-06-14 12:46:30,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 502 transitions, 6833 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-14 12:46:30,848 INFO L231 Difference]: Finished difference. Result has 342 places, 464 transitions, 5836 flow [2024-06-14 12:46:30,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5679, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5836, PETRI_PLACES=342, PETRI_TRANSITIONS=464} [2024-06-14 12:46:30,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-14 12:46:30,849 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 464 transitions, 5836 flow [2024-06-14 12:46:30,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:30,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:30,849 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 12:46:30,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:46:30,849 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:30,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:30,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1773895484, now seen corresponding path program 1 times [2024-06-14 12:46:30,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:30,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566912170] [2024-06-14 12:46:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:30,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:31,867 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 12:46:31,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:31,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566912170] [2024-06-14 12:46:31,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566912170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:31,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:31,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:46:31,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042623190] [2024-06-14 12:46:31,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:31,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:46:31,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:31,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:46:31,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:46:31,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:46:31,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 464 transitions, 5836 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 12:46:31,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:31,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:46:31,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:33,610 INFO L124 PetriNetUnfolderBase]: 4433/6816 cut-off events. [2024-06-14 12:46:33,610 INFO L125 PetriNetUnfolderBase]: For 528753/528755 co-relation queries the response was YES. [2024-06-14 12:46:33,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54261 conditions, 6816 events. 4433/6816 cut-off events. For 528753/528755 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39282 event pairs, 851 based on Foata normal form. 10/6825 useless extension candidates. Maximal degree in co-relation 54100. Up to 6532 conditions per place. [2024-06-14 12:46:33,707 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 477 selfloop transitions, 45 changer transitions 0/525 dead transitions. [2024-06-14 12:46:33,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 525 transitions, 7499 flow [2024-06-14 12:46:33,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:46:33,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:46:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-14 12:46:33,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376940133037694 [2024-06-14 12:46:33,709 INFO L175 Difference]: Start difference. First operand has 342 places, 464 transitions, 5836 flow. Second operand 11 states and 170 transitions. [2024-06-14 12:46:33,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 525 transitions, 7499 flow [2024-06-14 12:46:35,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 525 transitions, 7227 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-14 12:46:35,661 INFO L231 Difference]: Finished difference. Result has 348 places, 482 transitions, 5941 flow [2024-06-14 12:46:35,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5564, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5941, PETRI_PLACES=348, PETRI_TRANSITIONS=482} [2024-06-14 12:46:35,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-14 12:46:35,662 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 482 transitions, 5941 flow [2024-06-14 12:46:35,662 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 12:46:35,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:35,663 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 12:46:35,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:46:35,663 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 12:46:35,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:35,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1859829526, now seen corresponding path program 2 times [2024-06-14 12:46:35,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:35,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240268896] [2024-06-14 12:46:35,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:35,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:36,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:36,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240268896] [2024-06-14 12:46:36,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240268896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:36,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:36,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:46:36,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680968513] [2024-06-14 12:46:36,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:36,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:46:36,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:36,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:46:36,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:46:36,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:46:36,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 482 transitions, 5941 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:46:36,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:36,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:46:36,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:38,570 INFO L124 PetriNetUnfolderBase]: 4521/6950 cut-off events. [2024-06-14 12:46:38,571 INFO L125 PetriNetUnfolderBase]: For 582766/582774 co-relation queries the response was YES. [2024-06-14 12:46:38,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54873 conditions, 6950 events. 4521/6950 cut-off events. For 582766/582774 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 40187 event pairs, 879 based on Foata normal form. 32/6981 useless extension candidates. Maximal degree in co-relation 54709. Up to 6661 conditions per place. [2024-06-14 12:46:38,676 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 447 selfloop transitions, 60 changer transitions 0/510 dead transitions. [2024-06-14 12:46:38,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 510 transitions, 7164 flow [2024-06-14 12:46:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:46:38,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:46:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 12:46:38,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-14 12:46:38,678 INFO L175 Difference]: Start difference. First operand has 348 places, 482 transitions, 5941 flow. Second operand 9 states and 139 transitions. [2024-06-14 12:46:38,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 510 transitions, 7164 flow [2024-06-14 12:46:40,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 510 transitions, 7110 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:40,648 INFO L231 Difference]: Finished difference. Result has 352 places, 484 transitions, 6072 flow [2024-06-14 12:46:40,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5887, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6072, PETRI_PLACES=352, PETRI_TRANSITIONS=484} [2024-06-14 12:46:40,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-14 12:46:40,649 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 484 transitions, 6072 flow [2024-06-14 12:46:40,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:46:40,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:40,649 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 12:46:40,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:46:40,649 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 12:46:40,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:40,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1780096318, now seen corresponding path program 1 times [2024-06-14 12:46:40,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:40,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355388019] [2024-06-14 12:46:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:40,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:41,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:41,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355388019] [2024-06-14 12:46:41,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355388019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:41,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:41,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:41,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075380711] [2024-06-14 12:46:41,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:41,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:41,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:41,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:41,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:41,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:46:41,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 484 transitions, 6072 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 12:46:41,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:41,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:46:41,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:43,220 INFO L124 PetriNetUnfolderBase]: 4621/7108 cut-off events. [2024-06-14 12:46:43,221 INFO L125 PetriNetUnfolderBase]: For 590211/590217 co-relation queries the response was YES. [2024-06-14 12:46:43,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57404 conditions, 7108 events. 4621/7108 cut-off events. For 590211/590217 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 41308 event pairs, 890 based on Foata normal form. 14/7121 useless extension candidates. Maximal degree in co-relation 57238. Up to 6603 conditions per place. [2024-06-14 12:46:43,324 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 446 selfloop transitions, 59 changer transitions 0/508 dead transitions. [2024-06-14 12:46:43,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 508 transitions, 7446 flow [2024-06-14 12:46:43,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:46:43,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-14 12:46:43,325 INFO L175 Difference]: Start difference. First operand has 352 places, 484 transitions, 6072 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:46:43,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 508 transitions, 7446 flow [2024-06-14 12:46:45,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 508 transitions, 7308 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 12:46:45,297 INFO L231 Difference]: Finished difference. Result has 352 places, 486 transitions, 6114 flow [2024-06-14 12:46:45,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5934, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6114, PETRI_PLACES=352, PETRI_TRANSITIONS=486} [2024-06-14 12:46:45,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-14 12:46:45,298 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 486 transitions, 6114 flow [2024-06-14 12:46:45,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 12:46:45,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:45,298 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 12:46:45,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:46:45,299 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:45,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:45,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1780109338, now seen corresponding path program 2 times [2024-06-14 12:46:45,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:45,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127918423] [2024-06-14 12:46:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:45,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:46,190 INFO 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 12:46:46,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:46,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127918423] [2024-06-14 12:46:46,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127918423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:46,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:46,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:46,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143642211] [2024-06-14 12:46:46,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:46,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:46,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:46,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:46,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:46,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:46:46,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 486 transitions, 6114 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 12:46:46,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:46,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:46:46,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:47,888 INFO L124 PetriNetUnfolderBase]: 4565/7028 cut-off events. [2024-06-14 12:46:47,888 INFO L125 PetriNetUnfolderBase]: For 579916/579922 co-relation queries the response was YES. [2024-06-14 12:46:47,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54973 conditions, 7028 events. 4565/7028 cut-off events. For 579916/579922 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 40851 event pairs, 898 based on Foata normal form. 30/7057 useless extension candidates. Maximal degree in co-relation 54806. Up to 6729 conditions per place. [2024-06-14 12:46:47,993 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 446 selfloop transitions, 56 changer transitions 0/505 dead transitions. [2024-06-14 12:46:47,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 505 transitions, 7254 flow [2024-06-14 12:46:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:47,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:46:47,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:46:47,994 INFO L175 Difference]: Start difference. First operand has 352 places, 486 transitions, 6114 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:46:47,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 505 transitions, 7254 flow [2024-06-14 12:46:50,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 505 transitions, 7155 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 12:46:50,111 INFO L231 Difference]: Finished difference. Result has 356 places, 486 transitions, 6137 flow [2024-06-14 12:46:50,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6015, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6137, PETRI_PLACES=356, PETRI_TRANSITIONS=486} [2024-06-14 12:46:50,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-14 12:46:50,112 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 486 transitions, 6137 flow [2024-06-14 12:46:50,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 12:46:50,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:50,113 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 12:46:50,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:46:50,113 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:50,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:50,113 INFO L85 PathProgramCache]: Analyzing trace with hash 402410742, now seen corresponding path program 7 times [2024-06-14 12:46:50,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:50,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475892066] [2024-06-14 12:46:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:50,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:50,943 INFO 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 12:46:50,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:50,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475892066] [2024-06-14 12:46:50,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475892066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:50,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:50,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:50,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783371717] [2024-06-14 12:46:50,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:50,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:50,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:50,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:50,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:50,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:46:50,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 486 transitions, 6137 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 12:46:50,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:50,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:46:50,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:52,647 INFO L124 PetriNetUnfolderBase]: 4617/7100 cut-off events. [2024-06-14 12:46:52,648 INFO L125 PetriNetUnfolderBase]: For 547483/547489 co-relation queries the response was YES. [2024-06-14 12:46:52,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56050 conditions, 7100 events. 4617/7100 cut-off events. For 547483/547489 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 41353 event pairs, 837 based on Foata normal form. 10/7109 useless extension candidates. Maximal degree in co-relation 55881. Up to 6814 conditions per place. [2024-06-14 12:46:52,750 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 458 selfloop transitions, 60 changer transitions 0/521 dead transitions. [2024-06-14 12:46:52,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 521 transitions, 7623 flow [2024-06-14 12:46:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:46:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:46:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-14 12:46:52,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-14 12:46:52,752 INFO L175 Difference]: Start difference. First operand has 356 places, 486 transitions, 6137 flow. Second operand 10 states and 154 transitions. [2024-06-14 12:46:52,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 521 transitions, 7623 flow [2024-06-14 12:46:54,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 521 transitions, 7490 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:46:55,005 INFO L231 Difference]: Finished difference. Result has 360 places, 492 transitions, 6316 flow [2024-06-14 12:46:55,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6004, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6316, PETRI_PLACES=360, PETRI_TRANSITIONS=492} [2024-06-14 12:46:55,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-14 12:46:55,006 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 492 transitions, 6316 flow [2024-06-14 12:46:55,006 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 12:46:55,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:55,006 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 12:46:55,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:46:55,006 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 12:46:55,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:55,007 INFO L85 PathProgramCache]: Analyzing trace with hash -745197628, now seen corresponding path program 4 times [2024-06-14 12:46:55,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:55,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459041271] [2024-06-14 12:46:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:55,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:56,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:56,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459041271] [2024-06-14 12:46:56,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459041271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:56,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:56,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:56,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351527257] [2024-06-14 12:46:56,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:56,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:56,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:56,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:56,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:56,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:46:56,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 492 transitions, 6316 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 12:46:56,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:56,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:46:56,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:57,754 INFO L124 PetriNetUnfolderBase]: 4643/7130 cut-off events. [2024-06-14 12:46:57,754 INFO L125 PetriNetUnfolderBase]: For 565060/565068 co-relation queries the response was YES. [2024-06-14 12:46:57,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57129 conditions, 7130 events. 4643/7130 cut-off events. For 565060/565068 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 41483 event pairs, 901 based on Foata normal form. 10/7139 useless extension candidates. Maximal degree in co-relation 56959. Up to 7017 conditions per place. [2024-06-14 12:46:57,861 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 479 selfloop transitions, 41 changer transitions 0/523 dead transitions. [2024-06-14 12:46:57,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 523 transitions, 7799 flow [2024-06-14 12:46:57,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:46:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:46:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 12:46:57,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-14 12:46:57,863 INFO L175 Difference]: Start difference. First operand has 360 places, 492 transitions, 6316 flow. Second operand 9 states and 137 transitions. [2024-06-14 12:46:57,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 523 transitions, 7799 flow [2024-06-14 12:47:00,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 523 transitions, 7566 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-14 12:47:00,399 INFO L231 Difference]: Finished difference. Result has 364 places, 499 transitions, 6384 flow [2024-06-14 12:47:00,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6083, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6384, PETRI_PLACES=364, PETRI_TRANSITIONS=499} [2024-06-14 12:47:00,400 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-14 12:47:00,400 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 499 transitions, 6384 flow [2024-06-14 12:47:00,401 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 12:47:00,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:00,401 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 12:47:00,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:47:00,401 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 12:47:00,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:00,402 INFO L85 PathProgramCache]: Analyzing trace with hash 197653186, now seen corresponding path program 8 times [2024-06-14 12:47:00,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:00,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707598535] [2024-06-14 12:47:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:00,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:01,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:01,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707598535] [2024-06-14 12:47:01,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707598535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:01,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:01,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:01,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807242935] [2024-06-14 12:47:01,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:01,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:01,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:01,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:01,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:01,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:47:01,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 499 transitions, 6384 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 12:47:01,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:01,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:47:01,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:03,007 INFO L124 PetriNetUnfolderBase]: 4631/7120 cut-off events. [2024-06-14 12:47:03,007 INFO L125 PetriNetUnfolderBase]: For 571445/571451 co-relation queries the response was YES. [2024-06-14 12:47:03,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56804 conditions, 7120 events. 4631/7120 cut-off events. For 571445/571451 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 41507 event pairs, 836 based on Foata normal form. 10/7129 useless extension candidates. Maximal degree in co-relation 56632. Up to 6842 conditions per place. [2024-06-14 12:47:03,121 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 459 selfloop transitions, 59 changer transitions 0/521 dead transitions. [2024-06-14 12:47:03,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 521 transitions, 7510 flow [2024-06-14 12:47:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:03,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:47:03,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-14 12:47:03,123 INFO L175 Difference]: Start difference. First operand has 364 places, 499 transitions, 6384 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:47:03,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 521 transitions, 7510 flow [2024-06-14 12:47:05,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 521 transitions, 7279 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:05,328 INFO L231 Difference]: Finished difference. Result has 367 places, 499 transitions, 6277 flow [2024-06-14 12:47:05,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6153, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6277, PETRI_PLACES=367, PETRI_TRANSITIONS=499} [2024-06-14 12:47:05,329 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-14 12:47:05,329 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 499 transitions, 6277 flow [2024-06-14 12:47:05,329 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 12:47:05,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:05,329 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 12:47:05,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:47:05,330 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 12:47:05,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:05,330 INFO L85 PathProgramCache]: Analyzing trace with hash -745047898, now seen corresponding path program 5 times [2024-06-14 12:47:05,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:05,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549221438] [2024-06-14 12:47:05,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:05,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:06,379 INFO 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 12:47:06,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:06,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549221438] [2024-06-14 12:47:06,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549221438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:06,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:06,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:06,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18168754] [2024-06-14 12:47:06,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:06,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:06,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:06,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:06,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:06,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:47:06,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 499 transitions, 6277 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 12:47:06,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:06,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:47:06,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:08,216 INFO L124 PetriNetUnfolderBase]: 4625/7106 cut-off events. [2024-06-14 12:47:08,217 INFO L125 PetriNetUnfolderBase]: For 568327/568335 co-relation queries the response was YES. [2024-06-14 12:47:08,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56562 conditions, 7106 events. 4625/7106 cut-off events. For 568327/568335 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 41385 event pairs, 897 based on Foata normal form. 10/7115 useless extension candidates. Maximal degree in co-relation 56388. Up to 7011 conditions per place. [2024-06-14 12:47:08,309 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 479 selfloop transitions, 35 changer transitions 0/517 dead transitions. [2024-06-14 12:47:08,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 517 transitions, 7371 flow [2024-06-14 12:47:08,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:08,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:08,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 12:47:08,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 12:47:08,310 INFO L175 Difference]: Start difference. First operand has 367 places, 499 transitions, 6277 flow. Second operand 8 states and 120 transitions. [2024-06-14 12:47:08,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 517 transitions, 7371 flow [2024-06-14 12:47:10,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 517 transitions, 7213 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 12:47:10,436 INFO L231 Difference]: Finished difference. Result has 368 places, 499 transitions, 6195 flow [2024-06-14 12:47:10,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6119, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6195, PETRI_PLACES=368, PETRI_TRANSITIONS=499} [2024-06-14 12:47:10,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-14 12:47:10,437 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 499 transitions, 6195 flow [2024-06-14 12:47:10,437 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 12:47:10,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:10,437 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 12:47:10,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:47:10,438 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 12:47:10,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:10,438 INFO L85 PathProgramCache]: Analyzing trace with hash -517296478, now seen corresponding path program 6 times [2024-06-14 12:47:10,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:10,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119843038] [2024-06-14 12:47:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:10,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:11,541 INFO 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 12:47:11,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:11,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119843038] [2024-06-14 12:47:11,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119843038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:11,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:11,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:11,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970626963] [2024-06-14 12:47:11,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:11,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:11,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:11,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:11,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:47:11,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 499 transitions, 6195 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 12:47:11,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:11,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:47:11,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:13,365 INFO L124 PetriNetUnfolderBase]: 4645/7134 cut-off events. [2024-06-14 12:47:13,366 INFO L125 PetriNetUnfolderBase]: For 580894/580902 co-relation queries the response was YES. [2024-06-14 12:47:13,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56771 conditions, 7134 events. 4645/7134 cut-off events. For 580894/580902 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 41534 event pairs, 901 based on Foata normal form. 10/7143 useless extension candidates. Maximal degree in co-relation 56596. Up to 6936 conditions per place. [2024-06-14 12:47:13,471 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 460 selfloop transitions, 62 changer transitions 0/525 dead transitions. [2024-06-14 12:47:13,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 525 transitions, 7419 flow [2024-06-14 12:47:13,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:47:13,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 12:47:13,473 INFO L175 Difference]: Start difference. First operand has 368 places, 499 transitions, 6195 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:47:13,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 525 transitions, 7419 flow [2024-06-14 12:47:16,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 525 transitions, 7349 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:47:16,028 INFO L231 Difference]: Finished difference. Result has 370 places, 505 transitions, 6385 flow [2024-06-14 12:47:16,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6125, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6385, PETRI_PLACES=370, PETRI_TRANSITIONS=505} [2024-06-14 12:47:16,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-14 12:47:16,029 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 505 transitions, 6385 flow [2024-06-14 12:47:16,029 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 12:47:16,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:16,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:16,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:47:16,030 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 12:47:16,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:16,030 INFO L85 PathProgramCache]: Analyzing trace with hash 409203648, now seen corresponding path program 7 times [2024-06-14 12:47:16,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:16,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288531372] [2024-06-14 12:47:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:16,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:17,034 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 12:47:17,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:17,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288531372] [2024-06-14 12:47:17,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288531372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:17,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:17,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:17,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29789536] [2024-06-14 12:47:17,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:17,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:17,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:17,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:17,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:17,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:47:17,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 505 transitions, 6385 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 12:47:17,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:17,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:47:17,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:18,812 INFO L124 PetriNetUnfolderBase]: 4663/7159 cut-off events. [2024-06-14 12:47:18,813 INFO L125 PetriNetUnfolderBase]: For 599314/599322 co-relation queries the response was YES. [2024-06-14 12:47:18,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57762 conditions, 7159 events. 4663/7159 cut-off events. For 599314/599322 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 41743 event pairs, 869 based on Foata normal form. 10/7168 useless extension candidates. Maximal degree in co-relation 57586. Up to 6853 conditions per place. [2024-06-14 12:47:18,925 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 432 selfloop transitions, 97 changer transitions 0/532 dead transitions. [2024-06-14 12:47:18,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 532 transitions, 7903 flow [2024-06-14 12:47:18,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:18,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:47:18,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:47:18,927 INFO L175 Difference]: Start difference. First operand has 370 places, 505 transitions, 6385 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:47:18,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 532 transitions, 7903 flow [2024-06-14 12:47:21,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 532 transitions, 7723 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:21,479 INFO L231 Difference]: Finished difference. Result has 373 places, 511 transitions, 6619 flow [2024-06-14 12:47:21,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6205, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6619, PETRI_PLACES=373, PETRI_TRANSITIONS=511} [2024-06-14 12:47:21,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-14 12:47:21,483 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 511 transitions, 6619 flow [2024-06-14 12:47:21,483 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 12:47:21,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:21,483 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 12:47:21,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:47:21,483 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 12:47:21,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:21,484 INFO L85 PathProgramCache]: Analyzing trace with hash 786761328, now seen corresponding path program 8 times [2024-06-14 12:47:21,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:21,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129456443] [2024-06-14 12:47:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:21,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:22,515 INFO 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 12:47:22,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:22,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129456443] [2024-06-14 12:47:22,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129456443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:22,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:22,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:22,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768845696] [2024-06-14 12:47:22,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:22,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:22,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:22,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:22,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:22,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:47:22,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 511 transitions, 6619 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 12:47:22,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:22,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:47:22,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:24,221 INFO L124 PetriNetUnfolderBase]: 4689/7195 cut-off events. [2024-06-14 12:47:24,222 INFO L125 PetriNetUnfolderBase]: For 623787/623795 co-relation queries the response was YES. [2024-06-14 12:47:24,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58859 conditions, 7195 events. 4689/7195 cut-off events. For 623787/623795 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 41886 event pairs, 887 based on Foata normal form. 10/7204 useless extension candidates. Maximal degree in co-relation 58682. Up to 6999 conditions per place. [2024-06-14 12:47:24,339 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 461 selfloop transitions, 71 changer transitions 0/535 dead transitions. [2024-06-14 12:47:24,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 535 transitions, 8147 flow [2024-06-14 12:47:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:47:24,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 12:47:24,340 INFO L175 Difference]: Start difference. First operand has 373 places, 511 transitions, 6619 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:47:24,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 535 transitions, 8147 flow [2024-06-14 12:47:26,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 535 transitions, 7889 flow, removed 99 selfloop flow, removed 3 redundant places. [2024-06-14 12:47:26,821 INFO L231 Difference]: Finished difference. Result has 378 places, 517 transitions, 6735 flow [2024-06-14 12:47:26,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6421, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6735, PETRI_PLACES=378, PETRI_TRANSITIONS=517} [2024-06-14 12:47:26,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-14 12:47:26,822 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 517 transitions, 6735 flow [2024-06-14 12:47:26,822 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 12:47:26,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:26,822 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 12:47:26,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:47:26,823 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 12:47:26,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:26,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1407902982, now seen corresponding path program 9 times [2024-06-14 12:47:26,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:26,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88060545] [2024-06-14 12:47:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:26,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:27,568 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 12:47:27,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:27,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88060545] [2024-06-14 12:47:27,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88060545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:27,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:27,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:27,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779204196] [2024-06-14 12:47:27,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:27,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:27,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:27,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:27,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:27,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:47:27,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 517 transitions, 6735 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 12:47:27,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:27,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:47:27,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:29,283 INFO L124 PetriNetUnfolderBase]: 4709/7229 cut-off events. [2024-06-14 12:47:29,284 INFO L125 PetriNetUnfolderBase]: For 640042/640048 co-relation queries the response was YES. [2024-06-14 12:47:29,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58964 conditions, 7229 events. 4709/7229 cut-off events. For 640042/640048 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 42165 event pairs, 838 based on Foata normal form. 10/7238 useless extension candidates. Maximal degree in co-relation 58785. Up to 6563 conditions per place. [2024-06-14 12:47:29,403 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 413 selfloop transitions, 132 changer transitions 0/548 dead transitions. [2024-06-14 12:47:29,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 548 transitions, 8509 flow [2024-06-14 12:47:29,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:29,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:47:29,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 12:47:29,405 INFO L175 Difference]: Start difference. First operand has 378 places, 517 transitions, 6735 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:47:29,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 548 transitions, 8509 flow [2024-06-14 12:47:32,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 548 transitions, 8369 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 12:47:32,447 INFO L231 Difference]: Finished difference. Result has 382 places, 523 transitions, 7071 flow [2024-06-14 12:47:32,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6595, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7071, PETRI_PLACES=382, PETRI_TRANSITIONS=523} [2024-06-14 12:47:32,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-14 12:47:32,448 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 523 transitions, 7071 flow [2024-06-14 12:47:32,448 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 12:47:32,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:32,448 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 12:47:32,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:47:32,448 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 12:47:32,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:32,449 INFO L85 PathProgramCache]: Analyzing trace with hash -361262938, now seen corresponding path program 9 times [2024-06-14 12:47:32,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:32,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047883013] [2024-06-14 12:47:32,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:32,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:33,402 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 12:47:33,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:33,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047883013] [2024-06-14 12:47:33,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047883013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:33,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:33,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:33,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758417982] [2024-06-14 12:47:33,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:33,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:33,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:33,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:33,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:33,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:47:33,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 523 transitions, 7071 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 12:47:33,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:33,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:47:33,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:35,234 INFO L124 PetriNetUnfolderBase]: 4703/7215 cut-off events. [2024-06-14 12:47:35,234 INFO L125 PetriNetUnfolderBase]: For 642955/642963 co-relation queries the response was YES. [2024-06-14 12:47:35,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59664 conditions, 7215 events. 4703/7215 cut-off events. For 642955/642963 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 42050 event pairs, 875 based on Foata normal form. 10/7224 useless extension candidates. Maximal degree in co-relation 59483. Up to 7054 conditions per place. [2024-06-14 12:47:35,357 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 477 selfloop transitions, 60 changer transitions 0/540 dead transitions. [2024-06-14 12:47:35,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 540 transitions, 8221 flow [2024-06-14 12:47:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:35,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:35,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 12:47:35,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-14 12:47:35,359 INFO L175 Difference]: Start difference. First operand has 382 places, 523 transitions, 7071 flow. Second operand 8 states and 122 transitions. [2024-06-14 12:47:35,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 540 transitions, 8221 flow [2024-06-14 12:47:38,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 540 transitions, 7976 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-14 12:47:38,222 INFO L231 Difference]: Finished difference. Result has 386 places, 523 transitions, 6952 flow [2024-06-14 12:47:38,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6826, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6952, PETRI_PLACES=386, PETRI_TRANSITIONS=523} [2024-06-14 12:47:38,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-14 12:47:38,225 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 523 transitions, 6952 flow [2024-06-14 12:47:38,225 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 12:47:38,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:38,226 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 12:47:38,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:47:38,226 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:38,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:38,226 INFO L85 PathProgramCache]: Analyzing trace with hash -771767293, now seen corresponding path program 2 times [2024-06-14 12:47:38,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:38,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859970719] [2024-06-14 12:47:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:38,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:39,082 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 12:47:39,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:39,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859970719] [2024-06-14 12:47:39,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859970719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:39,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:39,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:39,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709331908] [2024-06-14 12:47:39,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:39,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:39,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:39,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:39,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:39,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:47:39,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 523 transitions, 6952 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 12:47:39,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:39,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:47:39,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:40,928 INFO L124 PetriNetUnfolderBase]: 4708/7222 cut-off events. [2024-06-14 12:47:40,928 INFO L125 PetriNetUnfolderBase]: For 640451/640459 co-relation queries the response was YES. [2024-06-14 12:47:41,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59041 conditions, 7222 events. 4708/7222 cut-off events. For 640451/640459 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 42115 event pairs, 918 based on Foata normal form. 9/7230 useless extension candidates. Maximal degree in co-relation 58858. Up to 7145 conditions per place. [2024-06-14 12:47:41,065 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 493 selfloop transitions, 40 changer transitions 0/536 dead transitions. [2024-06-14 12:47:41,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 536 transitions, 8160 flow [2024-06-14 12:47:41,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:41,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:41,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-14 12:47:41,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-14 12:47:41,066 INFO L175 Difference]: Start difference. First operand has 386 places, 523 transitions, 6952 flow. Second operand 7 states and 104 transitions. [2024-06-14 12:47:41,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 536 transitions, 8160 flow [2024-06-14 12:47:44,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 536 transitions, 8010 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 12:47:44,081 INFO L231 Difference]: Finished difference. Result has 386 places, 526 transitions, 7006 flow [2024-06-14 12:47:44,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6802, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7006, PETRI_PLACES=386, PETRI_TRANSITIONS=526} [2024-06-14 12:47:44,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-14 12:47:44,082 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 526 transitions, 7006 flow [2024-06-14 12:47:44,082 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 12:47:44,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:44,083 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 12:47:44,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:47:44,083 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:44,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:44,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2068930599, now seen corresponding path program 3 times [2024-06-14 12:47:44,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:44,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326698781] [2024-06-14 12:47:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:44,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:44,949 INFO 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 12:47:44,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:44,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326698781] [2024-06-14 12:47:44,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326698781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:44,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:44,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:44,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739088201] [2024-06-14 12:47:44,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:44,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:44,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:44,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:44,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:45,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:47:45,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 526 transitions, 7006 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 12:47:45,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:45,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:47:45,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:46,684 INFO L124 PetriNetUnfolderBase]: 4705/7218 cut-off events. [2024-06-14 12:47:46,685 INFO L125 PetriNetUnfolderBase]: For 651760/651768 co-relation queries the response was YES. [2024-06-14 12:47:46,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59018 conditions, 7218 events. 4705/7218 cut-off events. For 651760/651768 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 42105 event pairs, 904 based on Foata normal form. 9/7226 useless extension candidates. Maximal degree in co-relation 58834. Up to 7108 conditions per place. [2024-06-14 12:47:46,797 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 481 selfloop transitions, 56 changer transitions 0/540 dead transitions. [2024-06-14 12:47:46,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 540 transitions, 8238 flow [2024-06-14 12:47:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-14 12:47:46,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 12:47:46,799 INFO L175 Difference]: Start difference. First operand has 386 places, 526 transitions, 7006 flow. Second operand 7 states and 105 transitions. [2024-06-14 12:47:46,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 540 transitions, 8238 flow [2024-06-14 12:47:49,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 540 transitions, 8072 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 12:47:49,068 INFO L231 Difference]: Finished difference. Result has 387 places, 529 transitions, 7082 flow [2024-06-14 12:47:49,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6840, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7082, PETRI_PLACES=387, PETRI_TRANSITIONS=529} [2024-06-14 12:47:49,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-14 12:47:49,069 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 529 transitions, 7082 flow [2024-06-14 12:47:49,069 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 12:47:49,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:49,075 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 12:47:49,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:47:49,075 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:49,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:49,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1362065372, now seen corresponding path program 10 times [2024-06-14 12:47:49,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:49,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565533865] [2024-06-14 12:47:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:49,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:49,784 INFO 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 12:47:49,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:49,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565533865] [2024-06-14 12:47:49,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565533865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:49,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:49,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:49,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184250140] [2024-06-14 12:47:49,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:49,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:49,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:49,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:49,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:47:49,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 529 transitions, 7082 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 12:47:49,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:49,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:47:49,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:51,517 INFO L124 PetriNetUnfolderBase]: 4725/7252 cut-off events. [2024-06-14 12:47:51,518 INFO L125 PetriNetUnfolderBase]: For 666089/666095 co-relation queries the response was YES. [2024-06-14 12:47:51,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59431 conditions, 7252 events. 4725/7252 cut-off events. For 666089/666095 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 42314 event pairs, 917 based on Foata normal form. 10/7261 useless extension candidates. Maximal degree in co-relation 59247. Up to 6853 conditions per place. [2024-06-14 12:47:51,632 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 455 selfloop transitions, 92 changer transitions 0/550 dead transitions. [2024-06-14 12:47:51,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 550 transitions, 8546 flow [2024-06-14 12:47:51,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:51,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:47:51,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-14 12:47:51,633 INFO L175 Difference]: Start difference. First operand has 387 places, 529 transitions, 7082 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:47:51,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 550 transitions, 8546 flow [2024-06-14 12:47:54,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 550 transitions, 8340 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 12:47:54,836 INFO L231 Difference]: Finished difference. Result has 389 places, 532 transitions, 7179 flow [2024-06-14 12:47:54,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6878, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7179, PETRI_PLACES=389, PETRI_TRANSITIONS=532} [2024-06-14 12:47:54,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-14 12:47:54,836 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 532 transitions, 7179 flow [2024-06-14 12:47:54,837 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 12:47:54,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:54,837 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 12:47:54,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:47:54,837 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 12:47:54,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:54,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1362302708, now seen corresponding path program 10 times [2024-06-14 12:47:54,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:54,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677676508] [2024-06-14 12:47:54,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:54,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:55,673 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 12:47:55,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:55,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677676508] [2024-06-14 12:47:55,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677676508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:55,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:55,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:55,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528512237] [2024-06-14 12:47:55,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:55,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:55,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:55,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:55,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:55,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:47:55,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 532 transitions, 7179 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 12:47:55,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:55,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:47:55,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:57,642 INFO L124 PetriNetUnfolderBase]: 4735/7260 cut-off events. [2024-06-14 12:47:57,642 INFO L125 PetriNetUnfolderBase]: For 658441/658449 co-relation queries the response was YES. [2024-06-14 12:47:57,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59705 conditions, 7260 events. 4735/7260 cut-off events. For 658441/658449 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 42370 event pairs, 899 based on Foata normal form. 10/7269 useless extension candidates. Maximal degree in co-relation 59521. Up to 7139 conditions per place. [2024-06-14 12:47:57,745 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 499 selfloop transitions, 47 changer transitions 0/549 dead transitions. [2024-06-14 12:47:57,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 549 transitions, 8589 flow [2024-06-14 12:47:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 12:47:57,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-14 12:47:57,746 INFO L175 Difference]: Start difference. First operand has 389 places, 532 transitions, 7179 flow. Second operand 8 states and 118 transitions. [2024-06-14 12:47:57,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 549 transitions, 8589 flow [2024-06-14 12:48:01,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 549 transitions, 8213 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:01,134 INFO L231 Difference]: Finished difference. Result has 390 places, 535 transitions, 6989 flow [2024-06-14 12:48:01,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6803, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6989, PETRI_PLACES=390, PETRI_TRANSITIONS=535} [2024-06-14 12:48:01,135 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-14 12:48:01,135 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 535 transitions, 6989 flow [2024-06-14 12:48:01,135 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 12:48:01,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:01,136 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 12:48:01,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:48:01,136 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 12:48:01,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:01,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1184933852, now seen corresponding path program 11 times [2024-06-14 12:48:01,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:01,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396641348] [2024-06-14 12:48:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:01,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:01,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:01,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396641348] [2024-06-14 12:48:01,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396641348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:01,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:01,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:01,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409416227] [2024-06-14 12:48:01,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:01,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:01,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:01,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:01,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:01,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:48:01,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 535 transitions, 6989 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 12:48:01,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:01,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:48:01,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:03,854 INFO L124 PetriNetUnfolderBase]: 4755/7294 cut-off events. [2024-06-14 12:48:03,854 INFO L125 PetriNetUnfolderBase]: For 677955/677961 co-relation queries the response was YES. [2024-06-14 12:48:03,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59468 conditions, 7294 events. 4755/7294 cut-off events. For 677955/677961 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 42556 event pairs, 915 based on Foata normal form. 10/7303 useless extension candidates. Maximal degree in co-relation 59284. Up to 7024 conditions per place. [2024-06-14 12:48:03,964 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 486 selfloop transitions, 68 changer transitions 0/557 dead transitions. [2024-06-14 12:48:03,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 557 transitions, 8463 flow [2024-06-14 12:48:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:48:03,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 12:48:03,965 INFO L175 Difference]: Start difference. First operand has 390 places, 535 transitions, 6989 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:48:03,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 557 transitions, 8463 flow [2024-06-14 12:48:07,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 557 transitions, 8162 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-14 12:48:07,029 INFO L231 Difference]: Finished difference. Result has 390 places, 538 transitions, 6929 flow [2024-06-14 12:48:07,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6688, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6929, PETRI_PLACES=390, PETRI_TRANSITIONS=538} [2024-06-14 12:48:07,030 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-14 12:48:07,030 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 538 transitions, 6929 flow [2024-06-14 12:48:07,030 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 12:48:07,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:07,030 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 12:48:07,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:48:07,031 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 12:48:07,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:07,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1634852882, now seen corresponding path program 11 times [2024-06-14 12:48:07,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:07,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667833621] [2024-06-14 12:48:07,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:07,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:07,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:07,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667833621] [2024-06-14 12:48:07,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667833621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:07,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:07,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:07,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146661638] [2024-06-14 12:48:07,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:07,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:07,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:07,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:07,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:48:07,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 538 transitions, 6929 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 12:48:07,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:07,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:48:07,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:09,705 INFO L124 PetriNetUnfolderBase]: 4765/7302 cut-off events. [2024-06-14 12:48:09,705 INFO L125 PetriNetUnfolderBase]: For 682217/682225 co-relation queries the response was YES. [2024-06-14 12:48:09,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59396 conditions, 7302 events. 4765/7302 cut-off events. For 682217/682225 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 42538 event pairs, 918 based on Foata normal form. 10/7311 useless extension candidates. Maximal degree in co-relation 59213. Up to 7234 conditions per place. [2024-06-14 12:48:09,812 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 519 selfloop transitions, 31 changer transitions 0/553 dead transitions. [2024-06-14 12:48:09,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 553 transitions, 8147 flow [2024-06-14 12:48:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:09,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:09,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-14 12:48:09,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3475609756097561 [2024-06-14 12:48:09,814 INFO L175 Difference]: Start difference. First operand has 390 places, 538 transitions, 6929 flow. Second operand 8 states and 114 transitions. [2024-06-14 12:48:09,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 553 transitions, 8147 flow [2024-06-14 12:48:13,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 553 transitions, 7804 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:13,008 INFO L231 Difference]: Finished difference. Result has 391 places, 541 transitions, 6732 flow [2024-06-14 12:48:13,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6586, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6732, PETRI_PLACES=391, PETRI_TRANSITIONS=541} [2024-06-14 12:48:13,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-14 12:48:13,008 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 541 transitions, 6732 flow [2024-06-14 12:48:13,009 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 12:48:13,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:13,009 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 12:48:13,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:48:13,009 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 12:48:13,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:13,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1362065558, now seen corresponding path program 12 times [2024-06-14 12:48:13,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:13,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32124015] [2024-06-14 12:48:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:13,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:14,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:14,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32124015] [2024-06-14 12:48:14,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32124015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:14,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:14,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:14,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661336388] [2024-06-14 12:48:14,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:14,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:14,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:14,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:14,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:14,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:48:14,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 541 transitions, 6732 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 12:48:14,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:14,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:48:14,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:15,828 INFO L124 PetriNetUnfolderBase]: 4759/7294 cut-off events. [2024-06-14 12:48:15,829 INFO L125 PetriNetUnfolderBase]: For 684671/684679 co-relation queries the response was YES. [2024-06-14 12:48:15,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58508 conditions, 7294 events. 4759/7294 cut-off events. For 684671/684679 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 42522 event pairs, 911 based on Foata normal form. 10/7303 useless extension candidates. Maximal degree in co-relation 58325. Up to 7204 conditions per place. [2024-06-14 12:48:15,944 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 512 selfloop transitions, 39 changer transitions 0/554 dead transitions. [2024-06-14 12:48:15,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 554 transitions, 7890 flow [2024-06-14 12:48:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-14 12:48:15,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35365853658536583 [2024-06-14 12:48:15,945 INFO L175 Difference]: Start difference. First operand has 391 places, 541 transitions, 6732 flow. Second operand 8 states and 116 transitions. [2024-06-14 12:48:15,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 554 transitions, 7890 flow [2024-06-14 12:48:19,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 554 transitions, 7728 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:19,390 INFO L231 Difference]: Finished difference. Result has 393 places, 541 transitions, 6654 flow [2024-06-14 12:48:19,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6570, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6654, PETRI_PLACES=393, PETRI_TRANSITIONS=541} [2024-06-14 12:48:19,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-14 12:48:19,391 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 541 transitions, 6654 flow [2024-06-14 12:48:19,391 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 12:48:19,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:19,391 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 12:48:19,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:48:19,392 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 12:48:19,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:19,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1184813882, now seen corresponding path program 12 times [2024-06-14 12:48:19,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:19,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7440760] [2024-06-14 12:48:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:20,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:20,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7440760] [2024-06-14 12:48:20,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7440760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:20,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:20,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:20,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564673774] [2024-06-14 12:48:20,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:20,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:20,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:20,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:20,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:48:20,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 541 transitions, 6654 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 12:48:20,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:20,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:48:20,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:21,866 INFO L124 PetriNetUnfolderBase]: 4776/7324 cut-off events. [2024-06-14 12:48:21,867 INFO L125 PetriNetUnfolderBase]: For 703947/703953 co-relation queries the response was YES. [2024-06-14 12:48:21,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58685 conditions, 7324 events. 4776/7324 cut-off events. For 703947/703953 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 42701 event pairs, 933 based on Foata normal form. 10/7333 useless extension candidates. Maximal degree in co-relation 58501. Up to 7090 conditions per place. [2024-06-14 12:48:21,979 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 496 selfloop transitions, 65 changer transitions 0/564 dead transitions. [2024-06-14 12:48:21,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 564 transitions, 7958 flow [2024-06-14 12:48:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:21,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:48:21,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:48:21,981 INFO L175 Difference]: Start difference. First operand has 393 places, 541 transitions, 6654 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:48:21,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 564 transitions, 7958 flow [2024-06-14 12:48:24,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 564 transitions, 7846 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:24,529 INFO L231 Difference]: Finished difference. Result has 395 places, 548 transitions, 6802 flow [2024-06-14 12:48:24,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6542, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6802, PETRI_PLACES=395, PETRI_TRANSITIONS=548} [2024-06-14 12:48:24,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-14 12:48:24,530 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 548 transitions, 6802 flow [2024-06-14 12:48:24,530 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 12:48:24,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:24,530 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 12:48:24,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:48:24,530 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 12:48:24,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:24,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1184810906, now seen corresponding path program 3 times [2024-06-14 12:48:24,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:24,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193101771] [2024-06-14 12:48:24,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:24,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:25,536 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 12:48:25,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:25,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193101771] [2024-06-14 12:48:25,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193101771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:25,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:25,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:25,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871267738] [2024-06-14 12:48:25,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:25,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:25,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:25,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:25,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:25,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:48:25,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 548 transitions, 6802 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:48:25,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:25,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:48:25,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:27,541 INFO L124 PetriNetUnfolderBase]: 4820/7392 cut-off events. [2024-06-14 12:48:27,542 INFO L125 PetriNetUnfolderBase]: For 755365/755371 co-relation queries the response was YES. [2024-06-14 12:48:27,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60243 conditions, 7392 events. 4820/7392 cut-off events. For 755365/755371 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 43176 event pairs, 937 based on Foata normal form. 18/7409 useless extension candidates. Maximal degree in co-relation 60057. Up to 7120 conditions per place. [2024-06-14 12:48:27,661 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 505 selfloop transitions, 61 changer transitions 0/569 dead transitions. [2024-06-14 12:48:27,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 569 transitions, 8118 flow [2024-06-14 12:48:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:27,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:48:27,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 12:48:27,662 INFO L175 Difference]: Start difference. First operand has 395 places, 548 transitions, 6802 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:48:27,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 569 transitions, 8118 flow [2024-06-14 12:48:30,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 569 transitions, 7928 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 12:48:30,803 INFO L231 Difference]: Finished difference. Result has 399 places, 549 transitions, 6772 flow [2024-06-14 12:48:30,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6612, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6772, PETRI_PLACES=399, PETRI_TRANSITIONS=549} [2024-06-14 12:48:30,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-14 12:48:30,804 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 549 transitions, 6772 flow [2024-06-14 12:48:30,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:48:30,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:30,804 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 12:48:30,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:48:30,804 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 12:48:30,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:30,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1185210620, now seen corresponding path program 3 times [2024-06-14 12:48:30,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:30,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446379187] [2024-06-14 12:48:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:30,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:31,627 INFO 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 12:48:31,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:31,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446379187] [2024-06-14 12:48:31,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446379187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:31,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:31,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:31,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477101038] [2024-06-14 12:48:31,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:31,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:31,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:31,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:31,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:31,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:48:31,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 549 transitions, 6772 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 12:48:31,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:31,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:48:31,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:33,525 INFO L124 PetriNetUnfolderBase]: 4848/7436 cut-off events. [2024-06-14 12:48:33,525 INFO L125 PetriNetUnfolderBase]: For 754034/754040 co-relation queries the response was YES. [2024-06-14 12:48:33,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60654 conditions, 7436 events. 4848/7436 cut-off events. For 754034/754040 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43519 event pairs, 935 based on Foata normal form. 14/7449 useless extension candidates. Maximal degree in co-relation 60467. Up to 7126 conditions per place. [2024-06-14 12:48:33,649 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 509 selfloop transitions, 62 changer transitions 0/574 dead transitions. [2024-06-14 12:48:33,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 574 transitions, 8138 flow [2024-06-14 12:48:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:48:33,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-14 12:48:33,651 INFO L175 Difference]: Start difference. First operand has 399 places, 549 transitions, 6772 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:48:33,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 574 transitions, 8138 flow [2024-06-14 12:48:36,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 574 transitions, 8002 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:36,962 INFO L231 Difference]: Finished difference. Result has 401 places, 550 transitions, 6798 flow [2024-06-14 12:48:36,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6636, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6798, PETRI_PLACES=401, PETRI_TRANSITIONS=550} [2024-06-14 12:48:36,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-14 12:48:36,962 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 550 transitions, 6798 flow [2024-06-14 12:48:36,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 12:48:36,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:36,963 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 12:48:36,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:48:36,963 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 12:48:36,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:36,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1628039420, now seen corresponding path program 4 times [2024-06-14 12:48:36,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:36,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966729879] [2024-06-14 12:48:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:36,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:37,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:37,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966729879] [2024-06-14 12:48:37,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966729879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:37,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:37,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:37,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080365863] [2024-06-14 12:48:37,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:37,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:37,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:37,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:37,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:37,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:48:37,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 550 transitions, 6798 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 12:48:37,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:37,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:48:37,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:39,703 INFO L124 PetriNetUnfolderBase]: 4850/7442 cut-off events. [2024-06-14 12:48:39,704 INFO L125 PetriNetUnfolderBase]: For 749621/749627 co-relation queries the response was YES. [2024-06-14 12:48:39,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60341 conditions, 7442 events. 4850/7442 cut-off events. For 749621/749627 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43514 event pairs, 919 based on Foata normal form. 14/7455 useless extension candidates. Maximal degree in co-relation 60153. Up to 6834 conditions per place. [2024-06-14 12:48:39,822 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 501 selfloop transitions, 70 changer transitions 0/574 dead transitions. [2024-06-14 12:48:39,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 574 transitions, 8148 flow [2024-06-14 12:48:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:39,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:48:39,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-14 12:48:39,823 INFO L175 Difference]: Start difference. First operand has 401 places, 550 transitions, 6798 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:48:39,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 574 transitions, 8148 flow [2024-06-14 12:48:42,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 574 transitions, 8002 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:42,972 INFO L231 Difference]: Finished difference. Result has 403 places, 551 transitions, 6832 flow [2024-06-14 12:48:42,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6652, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6832, PETRI_PLACES=403, PETRI_TRANSITIONS=551} [2024-06-14 12:48:42,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-14 12:48:42,973 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 551 transitions, 6832 flow [2024-06-14 12:48:42,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 12:48:42,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:42,973 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 12:48:42,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:48:42,973 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 12:48:42,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:42,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1660208732, now seen corresponding path program 4 times [2024-06-14 12:48:42,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:42,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935526331] [2024-06-14 12:48:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:42,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:43,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:43,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935526331] [2024-06-14 12:48:43,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935526331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:43,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:43,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:48:43,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626889422] [2024-06-14 12:48:43,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:43,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:48:43,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:43,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:48:43,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:48:43,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:48:43,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 551 transitions, 6832 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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 12:48:43,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:43,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:48:43,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:45,543 INFO L124 PetriNetUnfolderBase]: 4693/7262 cut-off events. [2024-06-14 12:48:45,543 INFO L125 PetriNetUnfolderBase]: For 725504/725554 co-relation queries the response was YES. [2024-06-14 12:48:45,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58359 conditions, 7262 events. 4693/7262 cut-off events. For 725504/725554 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 43016 event pairs, 783 based on Foata normal form. 17/7245 useless extension candidates. Maximal degree in co-relation 58170. Up to 6519 conditions per place. [2024-06-14 12:48:45,862 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 455 selfloop transitions, 64 changer transitions 0/575 dead transitions. [2024-06-14 12:48:45,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 575 transitions, 8066 flow [2024-06-14 12:48:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:48:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:48:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:48:45,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-14 12:48:45,863 INFO L175 Difference]: Start difference. First operand has 403 places, 551 transitions, 6832 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:48:45,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 575 transitions, 8066 flow [2024-06-14 12:48:48,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 575 transitions, 7902 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:49,002 INFO L231 Difference]: Finished difference. Result has 404 places, 551 transitions, 6802 flow [2024-06-14 12:48:49,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6668, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6802, PETRI_PLACES=404, PETRI_TRANSITIONS=551} [2024-06-14 12:48:49,003 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-14 12:48:49,003 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 551 transitions, 6802 flow [2024-06-14 12:48:49,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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 12:48:49,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:49,003 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 12:48:49,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:48:49,003 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 12:48:49,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:49,004 INFO L85 PathProgramCache]: Analyzing trace with hash 642731856, now seen corresponding path program 1 times [2024-06-14 12:48:49,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:49,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852323849] [2024-06-14 12:48:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:49,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:50,576 INFO 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 12:48:50,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:50,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852323849] [2024-06-14 12:48:50,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852323849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:50,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:50,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:50,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733988082] [2024-06-14 12:48:50,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:50,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:50,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:50,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:50,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:50,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:48:50,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 551 transitions, 6802 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:48:50,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:50,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:48:50,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:52,902 INFO L124 PetriNetUnfolderBase]: 4895/7498 cut-off events. [2024-06-14 12:48:52,902 INFO L125 PetriNetUnfolderBase]: For 742312/742320 co-relation queries the response was YES. [2024-06-14 12:48:52,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60716 conditions, 7498 events. 4895/7498 cut-off events. For 742312/742320 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 43899 event pairs, 926 based on Foata normal form. 12/7509 useless extension candidates. Maximal degree in co-relation 60526. Up to 7208 conditions per place. [2024-06-14 12:48:53,020 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 505 selfloop transitions, 82 changer transitions 0/590 dead transitions. [2024-06-14 12:48:53,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 590 transitions, 8546 flow [2024-06-14 12:48:53,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:48:53,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:48:53,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-14 12:48:53,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-14 12:48:53,022 INFO L175 Difference]: Start difference. First operand has 404 places, 551 transitions, 6802 flow. Second operand 10 states and 156 transitions. [2024-06-14 12:48:53,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 590 transitions, 8546 flow [2024-06-14 12:48:56,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 590 transitions, 8356 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:56,098 INFO L231 Difference]: Finished difference. Result has 408 places, 562 transitions, 7088 flow [2024-06-14 12:48:56,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6614, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7088, PETRI_PLACES=408, PETRI_TRANSITIONS=562} [2024-06-14 12:48:56,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-14 12:48:56,099 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 562 transitions, 7088 flow [2024-06-14 12:48:56,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:48:56,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:56,099 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 12:48:56,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:48:56,099 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 12:48:56,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1413163248, now seen corresponding path program 2 times [2024-06-14 12:48:56,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:56,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23771508] [2024-06-14 12:48:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:56,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:57,415 INFO 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 12:48:57,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:57,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23771508] [2024-06-14 12:48:57,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23771508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:57,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:57,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:57,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449902172] [2024-06-14 12:48:57,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:57,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:57,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:57,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:57,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:57,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:48:57,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 562 transitions, 7088 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:48:57,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:57,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:48:57,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:59,481 INFO L124 PetriNetUnfolderBase]: 4883/7482 cut-off events. [2024-06-14 12:48:59,481 INFO L125 PetriNetUnfolderBase]: For 725628/725636 co-relation queries the response was YES. [2024-06-14 12:48:59,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60309 conditions, 7482 events. 4883/7482 cut-off events. For 725628/725636 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 43793 event pairs, 934 based on Foata normal form. 12/7493 useless extension candidates. Maximal degree in co-relation 60119. Up to 7252 conditions per place. [2024-06-14 12:48:59,607 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 510 selfloop transitions, 72 changer transitions 0/585 dead transitions. [2024-06-14 12:48:59,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 585 transitions, 8367 flow [2024-06-14 12:48:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:48:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:48:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 12:48:59,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-14 12:48:59,608 INFO L175 Difference]: Start difference. First operand has 408 places, 562 transitions, 7088 flow. Second operand 9 states and 138 transitions. [2024-06-14 12:48:59,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 585 transitions, 8367 flow [2024-06-14 12:49:02,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 585 transitions, 8028 flow, removed 125 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:02,933 INFO L231 Difference]: Finished difference. Result has 411 places, 563 transitions, 6937 flow [2024-06-14 12:49:02,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6777, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6937, PETRI_PLACES=411, PETRI_TRANSITIONS=563} [2024-06-14 12:49:02,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-14 12:49:02,934 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 563 transitions, 6937 flow [2024-06-14 12:49:02,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:49:02,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:02,934 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 12:49:02,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:49:02,934 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 12:49:02,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:02,935 INFO L85 PathProgramCache]: Analyzing trace with hash 642885678, now seen corresponding path program 1 times [2024-06-14 12:49:02,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:02,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842328777] [2024-06-14 12:49:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:02,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:04,108 INFO 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 12:49:04,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:04,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842328777] [2024-06-14 12:49:04,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842328777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:04,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:04,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:49:04,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800438671] [2024-06-14 12:49:04,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:04,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:49:04,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:04,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:49:04,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:49:04,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:49:04,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 563 transitions, 6937 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 12:49:04,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:04,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:49:04,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:06,150 INFO L124 PetriNetUnfolderBase]: 4891/7501 cut-off events. [2024-06-14 12:49:06,150 INFO L125 PetriNetUnfolderBase]: For 730056/730056 co-relation queries the response was YES. [2024-06-14 12:49:06,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60248 conditions, 7501 events. 4891/7501 cut-off events. For 730056/730056 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 44026 event pairs, 1139 based on Foata normal form. 2/7502 useless extension candidates. Maximal degree in co-relation 60056. Up to 7415 conditions per place. [2024-06-14 12:49:06,318 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 552 selfloop transitions, 30 changer transitions 0/585 dead transitions. [2024-06-14 12:49:06,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 585 transitions, 8247 flow [2024-06-14 12:49:06,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:06,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 12:49:06,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-14 12:49:06,319 INFO L175 Difference]: Start difference. First operand has 411 places, 563 transitions, 6937 flow. Second operand 8 states and 122 transitions. [2024-06-14 12:49:06,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 585 transitions, 8247 flow [2024-06-14 12:49:10,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 585 transitions, 8104 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:49:10,661 INFO L231 Difference]: Finished difference. Result has 412 places, 565 transitions, 6925 flow [2024-06-14 12:49:10,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6794, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6925, PETRI_PLACES=412, PETRI_TRANSITIONS=565} [2024-06-14 12:49:10,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-14 12:49:10,662 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 565 transitions, 6925 flow [2024-06-14 12:49:10,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 12:49:10,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:10,663 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 12:49:10,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:49:10,663 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 12:49:10,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:10,664 INFO L85 PathProgramCache]: Analyzing trace with hash -504907390, now seen corresponding path program 3 times [2024-06-14 12:49:10,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:10,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262731180] [2024-06-14 12:49:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:10,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:11,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:11,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262731180] [2024-06-14 12:49:11,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262731180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:11,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:11,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:11,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332666310] [2024-06-14 12:49:11,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:11,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:11,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:11,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:11,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:12,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:49:12,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 565 transitions, 6925 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:49:12,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:12,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:49:12,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:13,757 INFO L124 PetriNetUnfolderBase]: 4893/7504 cut-off events. [2024-06-14 12:49:13,757 INFO L125 PetriNetUnfolderBase]: For 739229/739229 co-relation queries the response was YES. [2024-06-14 12:49:13,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60305 conditions, 7504 events. 4893/7504 cut-off events. For 739229/739229 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 44039 event pairs, 1132 based on Foata normal form. 2/7505 useless extension candidates. Maximal degree in co-relation 60112. Up to 7338 conditions per place. [2024-06-14 12:49:13,876 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 538 selfloop transitions, 53 changer transitions 0/594 dead transitions. [2024-06-14 12:49:13,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 594 transitions, 8341 flow [2024-06-14 12:49:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:49:13,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:49:13,877 INFO L175 Difference]: Start difference. First operand has 412 places, 565 transitions, 6925 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:49:13,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 594 transitions, 8341 flow [2024-06-14 12:49:17,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 594 transitions, 8226 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:17,043 INFO L231 Difference]: Finished difference. Result has 416 places, 574 transitions, 7120 flow [2024-06-14 12:49:17,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6810, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7120, PETRI_PLACES=416, PETRI_TRANSITIONS=574} [2024-06-14 12:49:17,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-14 12:49:17,043 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 574 transitions, 7120 flow [2024-06-14 12:49:17,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:49:17,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:17,044 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 12:49:17,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:49:17,044 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 12:49:17,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:17,044 INFO L85 PathProgramCache]: Analyzing trace with hash 786978018, now seen corresponding path program 2 times [2024-06-14 12:49:17,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:17,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740425695] [2024-06-14 12:49:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:17,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:18,209 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 12:49:18,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:18,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740425695] [2024-06-14 12:49:18,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740425695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:18,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:18,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:18,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139236043] [2024-06-14 12:49:18,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:18,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:18,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:18,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:18,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:18,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:49:18,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 574 transitions, 7120 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:49:18,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:18,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:49:18,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:20,205 INFO L124 PetriNetUnfolderBase]: 4901/7516 cut-off events. [2024-06-14 12:49:20,205 INFO L125 PetriNetUnfolderBase]: For 755043/755043 co-relation queries the response was YES. [2024-06-14 12:49:20,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61134 conditions, 7516 events. 4901/7516 cut-off events. For 755043/755043 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 44145 event pairs, 1140 based on Foata normal form. 2/7517 useless extension candidates. Maximal degree in co-relation 60938. Up to 7453 conditions per place. [2024-06-14 12:49:20,338 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 568 selfloop transitions, 22 changer transitions 0/593 dead transitions. [2024-06-14 12:49:20,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 593 transitions, 8442 flow [2024-06-14 12:49:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 12:49:20,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-14 12:49:20,339 INFO L175 Difference]: Start difference. First operand has 416 places, 574 transitions, 7120 flow. Second operand 8 states and 118 transitions. [2024-06-14 12:49:20,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 593 transitions, 8442 flow [2024-06-14 12:49:24,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 593 transitions, 8286 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 12:49:24,240 INFO L231 Difference]: Finished difference. Result has 419 places, 576 transitions, 7085 flow [2024-06-14 12:49:24,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6964, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7085, PETRI_PLACES=419, PETRI_TRANSITIONS=576} [2024-06-14 12:49:24,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-14 12:49:24,240 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 576 transitions, 7085 flow [2024-06-14 12:49:24,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:49:24,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:24,241 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 12:49:24,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:49:24,241 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 12:49:24,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:24,241 INFO L85 PathProgramCache]: Analyzing trace with hash 786985458, now seen corresponding path program 3 times [2024-06-14 12:49:24,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:24,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80201923] [2024-06-14 12:49:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:24,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:25,538 INFO 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 12:49:25,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:25,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80201923] [2024-06-14 12:49:25,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80201923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:25,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:25,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:25,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064206465] [2024-06-14 12:49:25,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:25,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:25,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:25,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:25,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:25,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:49:25,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 576 transitions, 7085 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:49:25,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:25,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:49:25,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:27,362 INFO L124 PetriNetUnfolderBase]: 4909/7528 cut-off events. [2024-06-14 12:49:27,362 INFO L125 PetriNetUnfolderBase]: For 756276/756276 co-relation queries the response was YES. [2024-06-14 12:49:27,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61194 conditions, 7528 events. 4909/7528 cut-off events. For 756276/756276 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 44203 event pairs, 1140 based on Foata normal form. 2/7529 useless extension candidates. Maximal degree in co-relation 60998. Up to 7465 conditions per place. [2024-06-14 12:49:27,483 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 571 selfloop transitions, 21 changer transitions 0/595 dead transitions. [2024-06-14 12:49:27,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 595 transitions, 8405 flow [2024-06-14 12:49:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-14 12:49:27,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567073170731707 [2024-06-14 12:49:27,497 INFO L175 Difference]: Start difference. First operand has 419 places, 576 transitions, 7085 flow. Second operand 8 states and 117 transitions. [2024-06-14 12:49:27,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 595 transitions, 8405 flow [2024-06-14 12:49:31,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 595 transitions, 8300 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:31,055 INFO L231 Difference]: Finished difference. Result has 421 places, 578 transitions, 7103 flow [2024-06-14 12:49:31,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6980, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7103, PETRI_PLACES=421, PETRI_TRANSITIONS=578} [2024-06-14 12:49:31,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-14 12:49:31,056 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 578 transitions, 7103 flow [2024-06-14 12:49:31,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:49:31,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:31,056 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 12:49:31,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:49:31,057 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 12:49:31,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:31,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1499185936, now seen corresponding path program 4 times [2024-06-14 12:49:31,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:31,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133292759] [2024-06-14 12:49:31,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:31,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:32,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:32,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133292759] [2024-06-14 12:49:32,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133292759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:32,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:32,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:32,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32638953] [2024-06-14 12:49:32,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:32,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:32,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:32,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:32,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:32,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:49:32,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 578 transitions, 7103 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:49:32,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:32,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:49:32,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:34,286 INFO L124 PetriNetUnfolderBase]: 4917/7540 cut-off events. [2024-06-14 12:49:34,286 INFO L125 PetriNetUnfolderBase]: For 771210/771210 co-relation queries the response was YES. [2024-06-14 12:49:34,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61501 conditions, 7540 events. 4917/7540 cut-off events. For 771210/771210 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 44280 event pairs, 1159 based on Foata normal form. 2/7541 useless extension candidates. Maximal degree in co-relation 61304. Up to 7487 conditions per place. [2024-06-14 12:49:34,397 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 573 selfloop transitions, 17 changer transitions 0/593 dead transitions. [2024-06-14 12:49:34,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 593 transitions, 8391 flow [2024-06-14 12:49:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-14 12:49:34,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3384146341463415 [2024-06-14 12:49:34,399 INFO L175 Difference]: Start difference. First operand has 421 places, 578 transitions, 7103 flow. Second operand 8 states and 111 transitions. [2024-06-14 12:49:34,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 593 transitions, 8391 flow [2024-06-14 12:49:38,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 593 transitions, 8284 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:38,084 INFO L231 Difference]: Finished difference. Result has 423 places, 580 transitions, 7115 flow [2024-06-14 12:49:38,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6996, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7115, PETRI_PLACES=423, PETRI_TRANSITIONS=580} [2024-06-14 12:49:38,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-14 12:49:38,086 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 580 transitions, 7115 flow [2024-06-14 12:49:38,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:49:38,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:38,091 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 12:49:38,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:49:38,091 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 12:49:38,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:38,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1812438242, now seen corresponding path program 5 times [2024-06-14 12:49:38,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:38,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728691085] [2024-06-14 12:49:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:38,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:39,312 INFO 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 12:49:39,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:39,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728691085] [2024-06-14 12:49:39,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728691085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:39,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:39,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:39,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940817336] [2024-06-14 12:49:39,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:39,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:39,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:39,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:39,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:39,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:49:39,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 580 transitions, 7115 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:49:39,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:39,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:49:39,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:41,339 INFO L124 PetriNetUnfolderBase]: 4925/7552 cut-off events. [2024-06-14 12:49:41,340 INFO L125 PetriNetUnfolderBase]: For 786605/786605 co-relation queries the response was YES. [2024-06-14 12:49:41,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61794 conditions, 7552 events. 4925/7552 cut-off events. For 786605/786605 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 44414 event pairs, 1161 based on Foata normal form. 2/7553 useless extension candidates. Maximal degree in co-relation 61596. Up to 7504 conditions per place. [2024-06-14 12:49:41,466 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 575 selfloop transitions, 17 changer transitions 0/595 dead transitions. [2024-06-14 12:49:41,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 595 transitions, 8431 flow [2024-06-14 12:49:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-14 12:49:41,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-14 12:49:41,467 INFO L175 Difference]: Start difference. First operand has 423 places, 580 transitions, 7115 flow. Second operand 8 states and 112 transitions. [2024-06-14 12:49:41,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 595 transitions, 8431 flow [2024-06-14 12:49:45,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 595 transitions, 8328 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:45,822 INFO L231 Difference]: Finished difference. Result has 425 places, 582 transitions, 7135 flow [2024-06-14 12:49:45,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7012, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7135, PETRI_PLACES=425, PETRI_TRANSITIONS=582} [2024-06-14 12:49:45,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-14 12:49:45,823 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 582 transitions, 7135 flow [2024-06-14 12:49:45,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:49:45,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:45,823 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 12:49:45,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:49:45,823 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 12:49:45,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:45,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1619019691, now seen corresponding path program 1 times [2024-06-14 12:49:45,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:45,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199601398] [2024-06-14 12:49:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:45,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:46,996 INFO 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 12:49:46,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:46,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199601398] [2024-06-14 12:49:46,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199601398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:46,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:46,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:46,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160584953] [2024-06-14 12:49:46,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:46,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:46,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:46,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:46,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:47,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:49:47,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 582 transitions, 7135 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:49:47,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:47,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:49:47,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:48,944 INFO L124 PetriNetUnfolderBase]: 4919/7544 cut-off events. [2024-06-14 12:49:48,944 INFO L125 PetriNetUnfolderBase]: For 790328/790328 co-relation queries the response was YES. [2024-06-14 12:49:49,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61598 conditions, 7544 events. 4919/7544 cut-off events. For 790328/790328 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 44360 event pairs, 1158 based on Foata normal form. 2/7545 useless extension candidates. Maximal degree in co-relation 61399. Up to 7471 conditions per place. [2024-06-14 12:49:49,074 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 566 selfloop transitions, 31 changer transitions 0/600 dead transitions. [2024-06-14 12:49:49,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 600 transitions, 8530 flow [2024-06-14 12:49:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:49,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-14 12:49:49,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35060975609756095 [2024-06-14 12:49:49,081 INFO L175 Difference]: Start difference. First operand has 425 places, 582 transitions, 7135 flow. Second operand 8 states and 115 transitions. [2024-06-14 12:49:49,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 600 transitions, 8530 flow [2024-06-14 12:49:52,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 600 transitions, 8423 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:52,834 INFO L231 Difference]: Finished difference. Result has 427 places, 585 transitions, 7214 flow [2024-06-14 12:49:52,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7028, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7214, PETRI_PLACES=427, PETRI_TRANSITIONS=585} [2024-06-14 12:49:52,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-14 12:49:52,834 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 585 transitions, 7214 flow [2024-06-14 12:49:52,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:49:52,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:52,835 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 12:49:52,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:49:52,835 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 12:49:52,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:52,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1619019908, now seen corresponding path program 6 times [2024-06-14 12:49:52,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:52,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513089721] [2024-06-14 12:49:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:52,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:53,971 INFO 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 12:49:53,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:53,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513089721] [2024-06-14 12:49:53,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513089721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:53,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:53,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:53,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911162820] [2024-06-14 12:49:53,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:53,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:53,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:53,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:53,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:54,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:49:54,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 585 transitions, 7214 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:49:54,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:54,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:49:54,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:56,007 INFO L124 PetriNetUnfolderBase]: 4927/7556 cut-off events. [2024-06-14 12:49:56,008 INFO L125 PetriNetUnfolderBase]: For 807444/807444 co-relation queries the response was YES. [2024-06-14 12:49:56,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62255 conditions, 7556 events. 4927/7556 cut-off events. For 807444/807444 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 44445 event pairs, 1166 based on Foata normal form. 2/7557 useless extension candidates. Maximal degree in co-relation 62055. Up to 7493 conditions per place. [2024-06-14 12:49:56,155 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 570 selfloop transitions, 27 changer transitions 0/600 dead transitions. [2024-06-14 12:49:56,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 600 transitions, 8546 flow [2024-06-14 12:49:56,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-14 12:49:56,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445121951219512 [2024-06-14 12:49:56,157 INFO L175 Difference]: Start difference. First operand has 427 places, 585 transitions, 7214 flow. Second operand 8 states and 113 transitions. [2024-06-14 12:49:56,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 600 transitions, 8546 flow [2024-06-14 12:50:00,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 600 transitions, 8408 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:00,525 INFO L231 Difference]: Finished difference. Result has 429 places, 587 transitions, 7228 flow [2024-06-14 12:50:00,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7076, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7228, PETRI_PLACES=429, PETRI_TRANSITIONS=587} [2024-06-14 12:50:00,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-14 12:50:00,526 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 587 transitions, 7228 flow [2024-06-14 12:50:00,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:00,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:00,526 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 12:50:00,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:50:00,527 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 12:50:00,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:00,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1362526838, now seen corresponding path program 7 times [2024-06-14 12:50:00,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:00,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444793810] [2024-06-14 12:50:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:00,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:01,707 INFO 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 12:50:01,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:01,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444793810] [2024-06-14 12:50:01,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444793810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:01,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:01,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:01,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220333775] [2024-06-14 12:50:01,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:01,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:01,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:01,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:50:01,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 587 transitions, 7228 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:01,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:01,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:50:01,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:03,537 INFO L124 PetriNetUnfolderBase]: 4935/7568 cut-off events. [2024-06-14 12:50:03,538 INFO L125 PetriNetUnfolderBase]: For 823249/823249 co-relation queries the response was YES. [2024-06-14 12:50:03,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62558 conditions, 7568 events. 4935/7568 cut-off events. For 823249/823249 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 44504 event pairs, 1170 based on Foata normal form. 2/7569 useless extension candidates. Maximal degree in co-relation 62357. Up to 7520 conditions per place. [2024-06-14 12:50:03,664 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 583 selfloop transitions, 16 changer transitions 0/602 dead transitions. [2024-06-14 12:50:03,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 602 transitions, 8558 flow [2024-06-14 12:50:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:50:03,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:50:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-14 12:50:03,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3384146341463415 [2024-06-14 12:50:03,665 INFO L175 Difference]: Start difference. First operand has 429 places, 587 transitions, 7228 flow. Second operand 8 states and 111 transitions. [2024-06-14 12:50:03,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 602 transitions, 8558 flow [2024-06-14 12:50:07,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 602 transitions, 8422 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:07,702 INFO L231 Difference]: Finished difference. Result has 431 places, 589 transitions, 7223 flow [2024-06-14 12:50:07,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7096, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7223, PETRI_PLACES=431, PETRI_TRANSITIONS=589} [2024-06-14 12:50:07,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-14 12:50:07,703 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 589 transitions, 7223 flow [2024-06-14 12:50:07,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:07,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:07,703 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 12:50:07,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:50:07,704 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 12:50:07,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2068946192, now seen corresponding path program 8 times [2024-06-14 12:50:07,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:07,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478011834] [2024-06-14 12:50:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:07,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:08,759 INFO 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 12:50:08,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:08,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478011834] [2024-06-14 12:50:08,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478011834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:08,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:08,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:08,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472578572] [2024-06-14 12:50:08,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:08,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:08,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:08,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:08,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:08,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:50:08,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 589 transitions, 7223 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:08,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:08,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:50:08,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:10,638 INFO L124 PetriNetUnfolderBase]: 4930/7561 cut-off events. [2024-06-14 12:50:10,639 INFO L125 PetriNetUnfolderBase]: For 810447/810447 co-relation queries the response was YES. [2024-06-14 12:50:10,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62073 conditions, 7561 events. 4930/7561 cut-off events. For 810447/810447 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 44483 event pairs, 1171 based on Foata normal form. 2/7562 useless extension candidates. Maximal degree in co-relation 61871. Up to 7493 conditions per place. [2024-06-14 12:50:10,780 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 576 selfloop transitions, 25 changer transitions 0/604 dead transitions. [2024-06-14 12:50:10,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 604 transitions, 8557 flow [2024-06-14 12:50:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:50:10,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:50:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-14 12:50:10,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-14 12:50:10,782 INFO L175 Difference]: Start difference. First operand has 431 places, 589 transitions, 7223 flow. Second operand 8 states and 112 transitions. [2024-06-14 12:50:10,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 604 transitions, 8557 flow [2024-06-14 12:50:14,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 604 transitions, 8446 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:14,619 INFO L231 Difference]: Finished difference. Result has 433 places, 591 transitions, 7264 flow [2024-06-14 12:50:14,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7112, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7264, PETRI_PLACES=433, PETRI_TRANSITIONS=591} [2024-06-14 12:50:14,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-14 12:50:14,620 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 591 transitions, 7264 flow [2024-06-14 12:50:14,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:14,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:14,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:14,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:50:14,620 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 12:50:14,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:14,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1813476907, now seen corresponding path program 1 times [2024-06-14 12:50:14,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:14,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740707104] [2024-06-14 12:50:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:14,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:15,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:15,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740707104] [2024-06-14 12:50:15,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740707104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:15,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:15,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:15,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449759538] [2024-06-14 12:50:15,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:15,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:15,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:15,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:15,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:15,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:50:15,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 591 transitions, 7264 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:15,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:15,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:50:15,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:17,721 INFO L124 PetriNetUnfolderBase]: 4942/7571 cut-off events. [2024-06-14 12:50:17,721 INFO L125 PetriNetUnfolderBase]: For 818332/818340 co-relation queries the response was YES. [2024-06-14 12:50:17,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62253 conditions, 7571 events. 4942/7571 cut-off events. For 818332/818340 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 44380 event pairs, 896 based on Foata normal form. 10/7580 useless extension candidates. Maximal degree in co-relation 62050. Up to 7247 conditions per place. [2024-06-14 12:50:17,858 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 529 selfloop transitions, 98 changer transitions 0/630 dead transitions. [2024-06-14 12:50:17,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 630 transitions, 9068 flow [2024-06-14 12:50:17,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:17,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:50:17,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:50:17,859 INFO L175 Difference]: Start difference. First operand has 433 places, 591 transitions, 7264 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:50:17,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 630 transitions, 9068 flow [2024-06-14 12:50:21,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 630 transitions, 8880 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:21,333 INFO L231 Difference]: Finished difference. Result has 438 places, 605 transitions, 7590 flow [2024-06-14 12:50:21,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7078, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7590, PETRI_PLACES=438, PETRI_TRANSITIONS=605} [2024-06-14 12:50:21,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-14 12:50:21,334 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 605 transitions, 7590 flow [2024-06-14 12:50:21,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:21,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:21,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:21,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:50:21,334 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 12:50:21,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:21,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2013516937, now seen corresponding path program 2 times [2024-06-14 12:50:21,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:21,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641067208] [2024-06-14 12:50:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:21,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:22,288 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 12:50:22,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:22,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641067208] [2024-06-14 12:50:22,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641067208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:22,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:22,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:22,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188018167] [2024-06-14 12:50:22,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:22,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:22,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:22,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:22,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:22,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:50:22,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 605 transitions, 7590 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:22,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:22,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:50:22,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:24,347 INFO L124 PetriNetUnfolderBase]: 4952/7585 cut-off events. [2024-06-14 12:50:24,347 INFO L125 PetriNetUnfolderBase]: For 818612/818620 co-relation queries the response was YES. [2024-06-14 12:50:24,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62840 conditions, 7585 events. 4952/7585 cut-off events. For 818612/818620 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 44462 event pairs, 927 based on Foata normal form. 10/7594 useless extension candidates. Maximal degree in co-relation 62634. Up to 7374 conditions per place. [2024-06-14 12:50:24,476 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 547 selfloop transitions, 78 changer transitions 0/628 dead transitions. [2024-06-14 12:50:24,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 628 transitions, 9034 flow [2024-06-14 12:50:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 12:50:24,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-14 12:50:24,478 INFO L175 Difference]: Start difference. First operand has 438 places, 605 transitions, 7590 flow. Second operand 9 states and 138 transitions. [2024-06-14 12:50:24,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 628 transitions, 9034 flow [2024-06-14 12:50:29,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 628 transitions, 8769 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 12:50:29,651 INFO L231 Difference]: Finished difference. Result has 440 places, 609 transitions, 7619 flow [2024-06-14 12:50:29,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7353, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7619, PETRI_PLACES=440, PETRI_TRANSITIONS=609} [2024-06-14 12:50:29,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-14 12:50:29,651 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 609 transitions, 7619 flow [2024-06-14 12:50:29,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:29,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:29,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:29,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:50:29,652 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 12:50:29,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:29,653 INFO L85 PathProgramCache]: Analyzing trace with hash -757665058, now seen corresponding path program 1 times [2024-06-14 12:50:29,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:29,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858479084] [2024-06-14 12:50:29,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:29,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:30,668 INFO 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 12:50:30,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:30,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858479084] [2024-06-14 12:50:30,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858479084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:30,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:30,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:30,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652323070] [2024-06-14 12:50:30,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:30,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:30,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:30,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:30,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:30,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:50:30,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 609 transitions, 7619 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:30,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:30,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:50:30,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:33,042 INFO L124 PetriNetUnfolderBase]: 5004/7660 cut-off events. [2024-06-14 12:50:33,042 INFO L125 PetriNetUnfolderBase]: For 855410/855424 co-relation queries the response was YES. [2024-06-14 12:50:33,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64020 conditions, 7660 events. 5004/7660 cut-off events. For 855410/855424 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 44957 event pairs, 891 based on Foata normal form. 18/7677 useless extension candidates. Maximal degree in co-relation 63814. Up to 7268 conditions per place. [2024-06-14 12:50:33,166 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 546 selfloop transitions, 98 changer transitions 0/647 dead transitions. [2024-06-14 12:50:33,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 647 transitions, 9491 flow [2024-06-14 12:50:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:50:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:50:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-14 12:50:33,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:50:33,170 INFO L175 Difference]: Start difference. First operand has 440 places, 609 transitions, 7619 flow. Second operand 10 states and 160 transitions. [2024-06-14 12:50:33,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 647 transitions, 9491 flow [2024-06-14 12:50:38,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 647 transitions, 9278 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 12:50:38,141 INFO L231 Difference]: Finished difference. Result has 443 places, 615 transitions, 7841 flow [2024-06-14 12:50:38,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7408, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7841, PETRI_PLACES=443, PETRI_TRANSITIONS=615} [2024-06-14 12:50:38,148 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-14 12:50:38,148 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 615 transitions, 7841 flow [2024-06-14 12:50:38,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:38,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:38,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:38,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:50:38,150 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 12:50:38,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:38,151 INFO L85 PathProgramCache]: Analyzing trace with hash -757515328, now seen corresponding path program 2 times [2024-06-14 12:50:38,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:38,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255192397] [2024-06-14 12:50:38,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:38,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:39,066 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 12:50:39,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:39,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255192397] [2024-06-14 12:50:39,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255192397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:39,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:39,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:39,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626946360] [2024-06-14 12:50:39,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:39,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:39,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:39,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:39,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:39,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:50:39,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 615 transitions, 7841 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:39,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:39,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:50:39,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:41,288 INFO L124 PetriNetUnfolderBase]: 5024/7688 cut-off events. [2024-06-14 12:50:41,289 INFO L125 PetriNetUnfolderBase]: For 863308/863322 co-relation queries the response was YES. [2024-06-14 12:50:41,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64860 conditions, 7688 events. 5024/7688 cut-off events. For 863308/863322 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 45102 event pairs, 889 based on Foata normal form. 18/7705 useless extension candidates. Maximal degree in co-relation 64654. Up to 7386 conditions per place. [2024-06-14 12:50:41,410 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 552 selfloop transitions, 91 changer transitions 0/646 dead transitions. [2024-06-14 12:50:41,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 646 transitions, 9383 flow [2024-06-14 12:50:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:50:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:50:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-14 12:50:41,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 12:50:41,411 INFO L175 Difference]: Start difference. First operand has 443 places, 615 transitions, 7841 flow. Second operand 10 states and 155 transitions. [2024-06-14 12:50:41,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 646 transitions, 9383 flow [2024-06-14 12:50:45,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 646 transitions, 9067 flow, removed 101 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:45,610 INFO L231 Difference]: Finished difference. Result has 447 places, 618 transitions, 7837 flow [2024-06-14 12:50:45,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7573, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7837, PETRI_PLACES=447, PETRI_TRANSITIONS=618} [2024-06-14 12:50:45,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-14 12:50:45,611 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 618 transitions, 7837 flow [2024-06-14 12:50:45,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:45,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:45,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:45,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:50:45,611 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 12:50:45,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash -550861888, now seen corresponding path program 3 times [2024-06-14 12:50:45,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:45,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019418030] [2024-06-14 12:50:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:45,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:46,557 INFO 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 12:50:46,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:46,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019418030] [2024-06-14 12:50:46,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019418030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:46,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:46,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:46,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927641390] [2024-06-14 12:50:46,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:46,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:46,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:46,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:46,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:46,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:50:46,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 618 transitions, 7837 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:46,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:46,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:50:46,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:48,732 INFO L124 PetriNetUnfolderBase]: 5044/7716 cut-off events. [2024-06-14 12:50:48,732 INFO L125 PetriNetUnfolderBase]: For 872750/872764 co-relation queries the response was YES. [2024-06-14 12:50:48,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64910 conditions, 7716 events. 5044/7716 cut-off events. For 872750/872764 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 45293 event pairs, 961 based on Foata normal form. 18/7733 useless extension candidates. Maximal degree in co-relation 64702. Up to 7490 conditions per place. [2024-06-14 12:50:48,869 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 562 selfloop transitions, 79 changer transitions 0/644 dead transitions. [2024-06-14 12:50:48,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 644 transitions, 9301 flow [2024-06-14 12:50:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:50:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:50:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-14 12:50:48,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36341463414634145 [2024-06-14 12:50:48,871 INFO L175 Difference]: Start difference. First operand has 447 places, 618 transitions, 7837 flow. Second operand 10 states and 149 transitions. [2024-06-14 12:50:48,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 644 transitions, 9301 flow [2024-06-14 12:50:54,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 644 transitions, 9065 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-14 12:50:54,078 INFO L231 Difference]: Finished difference. Result has 449 places, 621 transitions, 7847 flow [2024-06-14 12:50:54,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7601, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7847, PETRI_PLACES=449, PETRI_TRANSITIONS=621} [2024-06-14 12:50:54,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-14 12:50:54,079 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 621 transitions, 7847 flow [2024-06-14 12:50:54,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:54,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:54,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:54,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:50:54,080 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 12:50:54,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:54,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1820007449, now seen corresponding path program 1 times [2024-06-14 12:50:54,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:54,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341909952] [2024-06-14 12:50:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:54,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:54,937 INFO 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 12:50:54,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:54,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341909952] [2024-06-14 12:50:54,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341909952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:54,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:54,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:54,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669963010] [2024-06-14 12:50:54,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:54,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:54,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:54,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:54,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:54,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:50:54,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 621 transitions, 7847 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:50:54,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:54,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:50:54,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:57,111 INFO L124 PetriNetUnfolderBase]: 5054/7730 cut-off events. [2024-06-14 12:50:57,111 INFO L125 PetriNetUnfolderBase]: For 876755/876769 co-relation queries the response was YES. [2024-06-14 12:50:57,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65075 conditions, 7730 events. 5054/7730 cut-off events. For 876755/876769 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 45396 event pairs, 950 based on Foata normal form. 16/7745 useless extension candidates. Maximal degree in co-relation 64866. Up to 7516 conditions per place. [2024-06-14 12:50:57,252 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 563 selfloop transitions, 87 changer transitions 0/653 dead transitions. [2024-06-14 12:50:57,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 653 transitions, 9466 flow [2024-06-14 12:50:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-14 12:50:57,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685636856368564 [2024-06-14 12:50:57,253 INFO L175 Difference]: Start difference. First operand has 449 places, 621 transitions, 7847 flow. Second operand 9 states and 136 transitions. [2024-06-14 12:50:57,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 653 transitions, 9466 flow [2024-06-14 12:51:01,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 653 transitions, 9232 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-14 12:51:01,439 INFO L231 Difference]: Finished difference. Result has 452 places, 634 transitions, 8078 flow [2024-06-14 12:51:01,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7629, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8078, PETRI_PLACES=452, PETRI_TRANSITIONS=634} [2024-06-14 12:51:01,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-14 12:51:01,451 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 634 transitions, 8078 flow [2024-06-14 12:51:01,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:51:01,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:01,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:01,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:51:01,458 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 12:51:01,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:01,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1687200876, now seen corresponding path program 4 times [2024-06-14 12:51:01,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:01,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590293679] [2024-06-14 12:51:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:01,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:02,557 INFO 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 12:51:02,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:02,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590293679] [2024-06-14 12:51:02,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590293679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:02,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:02,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:02,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032514076] [2024-06-14 12:51:02,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:02,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:02,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:02,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:02,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:02,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:02,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 634 transitions, 8078 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:51:02,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:02,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:02,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:04,871 INFO L124 PetriNetUnfolderBase]: 5192/7925 cut-off events. [2024-06-14 12:51:04,871 INFO L125 PetriNetUnfolderBase]: For 990546/990552 co-relation queries the response was YES. [2024-06-14 12:51:04,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69836 conditions, 7925 events. 5192/7925 cut-off events. For 990546/990552 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 46541 event pairs, 846 based on Foata normal form. 10/7934 useless extension candidates. Maximal degree in co-relation 69624. Up to 6963 conditions per place. [2024-06-14 12:51:05,023 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 494 selfloop transitions, 184 changer transitions 0/681 dead transitions. [2024-06-14 12:51:05,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 681 transitions, 10780 flow [2024-06-14 12:51:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:05,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:05,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:51:05,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 12:51:05,025 INFO L175 Difference]: Start difference. First operand has 452 places, 634 transitions, 8078 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:51:05,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 681 transitions, 10780 flow [2024-06-14 12:51:09,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 681 transitions, 10552 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:10,001 INFO L231 Difference]: Finished difference. Result has 458 places, 650 transitions, 8895 flow [2024-06-14 12:51:10,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7850, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8895, PETRI_PLACES=458, PETRI_TRANSITIONS=650} [2024-06-14 12:51:10,002 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-14 12:51:10,002 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 650 transitions, 8895 flow [2024-06-14 12:51:10,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:51:10,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:10,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:10,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:51:10,003 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 12:51:10,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:10,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1222503464, now seen corresponding path program 5 times [2024-06-14 12:51:10,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:10,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273727151] [2024-06-14 12:51:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:10,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:11,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:11,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273727151] [2024-06-14 12:51:11,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273727151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:11,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:11,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:11,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556372425] [2024-06-14 12:51:11,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:11,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:11,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:11,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:11,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:11,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 650 transitions, 8895 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:51:11,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:11,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:11,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:13,343 INFO L124 PetriNetUnfolderBase]: 5244/7997 cut-off events. [2024-06-14 12:51:13,343 INFO L125 PetriNetUnfolderBase]: For 1047194/1047200 co-relation queries the response was YES. [2024-06-14 12:51:13,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72768 conditions, 7997 events. 5244/7997 cut-off events. For 1047194/1047200 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 46997 event pairs, 860 based on Foata normal form. 10/8006 useless extension candidates. Maximal degree in co-relation 72553. Up to 7003 conditions per place. [2024-06-14 12:51:13,487 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 488 selfloop transitions, 193 changer transitions 0/684 dead transitions. [2024-06-14 12:51:13,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 684 transitions, 11320 flow [2024-06-14 12:51:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:51:13,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-14 12:51:13,488 INFO L175 Difference]: Start difference. First operand has 458 places, 650 transitions, 8895 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:51:13,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 684 transitions, 11320 flow [2024-06-14 12:51:19,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 684 transitions, 10903 flow, removed 170 selfloop flow, removed 3 redundant places. [2024-06-14 12:51:19,303 INFO L231 Difference]: Finished difference. Result has 464 places, 656 transitions, 9121 flow [2024-06-14 12:51:19,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8578, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9121, PETRI_PLACES=464, PETRI_TRANSITIONS=656} [2024-06-14 12:51:19,312 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-14 12:51:19,312 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 656 transitions, 9121 flow [2024-06-14 12:51:19,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:51:19,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:19,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:19,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:51:19,313 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 12:51:19,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:19,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1223848582, now seen corresponding path program 6 times [2024-06-14 12:51:19,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:19,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912061593] [2024-06-14 12:51:19,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:19,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:20,351 INFO 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 12:51:20,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:20,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912061593] [2024-06-14 12:51:20,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912061593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:20,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:20,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:20,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468535278] [2024-06-14 12:51:20,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:20,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:20,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:20,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:20,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:20,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:20,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 656 transitions, 9121 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:51:20,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:20,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:20,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:22,915 INFO L124 PetriNetUnfolderBase]: 5248/7997 cut-off events. [2024-06-14 12:51:22,915 INFO L125 PetriNetUnfolderBase]: For 1030743/1030751 co-relation queries the response was YES. [2024-06-14 12:51:23,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71874 conditions, 7997 events. 5248/7997 cut-off events. For 1030743/1030751 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 47051 event pairs, 921 based on Foata normal form. 12/8008 useless extension candidates. Maximal degree in co-relation 71657. Up to 7702 conditions per place. [2024-06-14 12:51:23,060 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 602 selfloop transitions, 81 changer transitions 0/686 dead transitions. [2024-06-14 12:51:23,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 686 transitions, 10931 flow [2024-06-14 12:51:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:51:23,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:51:23,061 INFO L175 Difference]: Start difference. First operand has 464 places, 656 transitions, 9121 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:51:23,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 686 transitions, 10931 flow [2024-06-14 12:51:28,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 686 transitions, 10559 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:28,964 INFO L231 Difference]: Finished difference. Result has 469 places, 659 transitions, 9026 flow [2024-06-14 12:51:28,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8755, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9026, PETRI_PLACES=469, PETRI_TRANSITIONS=659} [2024-06-14 12:51:28,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-14 12:51:28,965 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 659 transitions, 9026 flow [2024-06-14 12:51:28,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:51:28,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:28,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:28,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:51:28,965 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 12:51:28,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:28,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1681509989, now seen corresponding path program 1 times [2024-06-14 12:51:28,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:28,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110653669] [2024-06-14 12:51:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:28,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:29,983 INFO 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 12:51:29,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:29,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110653669] [2024-06-14 12:51:29,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110653669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:29,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:29,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:29,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909061354] [2024-06-14 12:51:29,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:29,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:29,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:29,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:29,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:30,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:30,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 659 transitions, 9026 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:51:30,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:30,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:30,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:32,492 INFO L124 PetriNetUnfolderBase]: 5341/8127 cut-off events. [2024-06-14 12:51:32,493 INFO L125 PetriNetUnfolderBase]: For 1071367/1071375 co-relation queries the response was YES. [2024-06-14 12:51:32,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73284 conditions, 8127 events. 5341/8127 cut-off events. For 1071367/1071375 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 47707 event pairs, 963 based on Foata normal form. 12/8138 useless extension candidates. Maximal degree in co-relation 73065. Up to 7734 conditions per place. [2024-06-14 12:51:32,654 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 581 selfloop transitions, 117 changer transitions 0/701 dead transitions. [2024-06-14 12:51:32,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 701 transitions, 11130 flow [2024-06-14 12:51:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:51:32,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-14 12:51:32,655 INFO L175 Difference]: Start difference. First operand has 469 places, 659 transitions, 9026 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:51:32,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 701 transitions, 11130 flow [2024-06-14 12:51:38,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 701 transitions, 10971 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:51:38,447 INFO L231 Difference]: Finished difference. Result has 473 places, 676 transitions, 9543 flow [2024-06-14 12:51:38,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8867, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9543, PETRI_PLACES=473, PETRI_TRANSITIONS=676} [2024-06-14 12:51:38,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-14 12:51:38,448 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 676 transitions, 9543 flow [2024-06-14 12:51:38,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:51:38,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:38,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:38,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:51:38,448 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 12:51:38,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:38,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1228044404, now seen corresponding path program 7 times [2024-06-14 12:51:38,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:38,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845268173] [2024-06-14 12:51:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:38,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:39,521 INFO 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 12:51:39,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:39,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845268173] [2024-06-14 12:51:39,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845268173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:39,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:39,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:39,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699344322] [2024-06-14 12:51:39,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:39,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:39,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:39,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:39,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:39,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:39,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 676 transitions, 9543 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:51:39,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:39,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:39,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:41,949 INFO L124 PetriNetUnfolderBase]: 5361/8155 cut-off events. [2024-06-14 12:51:41,949 INFO L125 PetriNetUnfolderBase]: For 1097819/1097827 co-relation queries the response was YES. [2024-06-14 12:51:42,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74553 conditions, 8155 events. 5361/8155 cut-off events. For 1097819/1097827 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 47919 event pairs, 939 based on Foata normal form. 12/8166 useless extension candidates. Maximal degree in co-relation 74331. Up to 7848 conditions per place. [2024-06-14 12:51:42,114 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 617 selfloop transitions, 84 changer transitions 0/704 dead transitions. [2024-06-14 12:51:42,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 704 transitions, 11389 flow [2024-06-14 12:51:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:42,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:42,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:51:42,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:51:42,116 INFO L175 Difference]: Start difference. First operand has 473 places, 676 transitions, 9543 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:51:42,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 704 transitions, 11389 flow [2024-06-14 12:51:47,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 704 transitions, 11221 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-14 12:51:47,192 INFO L231 Difference]: Finished difference. Result has 478 places, 679 transitions, 9627 flow [2024-06-14 12:51:47,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9375, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9627, PETRI_PLACES=478, PETRI_TRANSITIONS=679} [2024-06-14 12:51:47,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-14 12:51:47,193 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 679 transitions, 9627 flow [2024-06-14 12:51:47,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:51:47,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:47,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:47,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:51:47,194 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 12:51:47,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:47,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1232693195, now seen corresponding path program 1 times [2024-06-14 12:51:47,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:47,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608774231] [2024-06-14 12:51:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:47,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:48,376 INFO 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 12:51:48,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:48,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608774231] [2024-06-14 12:51:48,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608774231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:48,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:48,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:48,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942197662] [2024-06-14 12:51:48,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:48,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:48,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:48,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:48,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:48,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:48,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 679 transitions, 9627 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:51:48,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:48,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:48,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:50,798 INFO L124 PetriNetUnfolderBase]: 5369/8167 cut-off events. [2024-06-14 12:51:50,798 INFO L125 PetriNetUnfolderBase]: For 1100921/1100929 co-relation queries the response was YES. [2024-06-14 12:51:50,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74869 conditions, 8167 events. 5369/8167 cut-off events. For 1100921/1100929 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 47976 event pairs, 978 based on Foata normal form. 10/8176 useless extension candidates. Maximal degree in co-relation 74645. Up to 8042 conditions per place. [2024-06-14 12:51:50,979 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 644 selfloop transitions, 50 changer transitions 0/697 dead transitions. [2024-06-14 12:51:50,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 697 transitions, 11153 flow [2024-06-14 12:51:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:51:50,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-14 12:51:50,981 INFO L175 Difference]: Start difference. First operand has 478 places, 679 transitions, 9627 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:51:50,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 697 transitions, 11153 flow [2024-06-14 12:51:57,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 697 transitions, 10967 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 12:51:57,782 INFO L231 Difference]: Finished difference. Result has 480 places, 681 transitions, 9625 flow [2024-06-14 12:51:57,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9441, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9625, PETRI_PLACES=480, PETRI_TRANSITIONS=681} [2024-06-14 12:51:57,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-14 12:51:57,783 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 681 transitions, 9625 flow [2024-06-14 12:51:57,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:51:57,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:57,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:57,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:51:57,784 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 12:51:57,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:57,784 INFO L85 PathProgramCache]: Analyzing trace with hash 375123236, now seen corresponding path program 8 times [2024-06-14 12:51:57,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:57,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737506348] [2024-06-14 12:51:57,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:57,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:58,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:58,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737506348] [2024-06-14 12:51:58,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737506348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:58,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:58,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:58,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37944364] [2024-06-14 12:51:58,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:58,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:58,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:58,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:58,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:58,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:58,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 681 transitions, 9625 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:51:58,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:58,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:58,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:01,463 INFO L124 PetriNetUnfolderBase]: 5389/8201 cut-off events. [2024-06-14 12:52:01,464 INFO L125 PetriNetUnfolderBase]: For 1132256/1132262 co-relation queries the response was YES. [2024-06-14 12:52:01,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75151 conditions, 8201 events. 5389/8201 cut-off events. For 1132256/1132262 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 48214 event pairs, 864 based on Foata normal form. 10/8210 useless extension candidates. Maximal degree in co-relation 74926. Up to 7674 conditions per place. [2024-06-14 12:52:01,607 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 560 selfloop transitions, 144 changer transitions 0/707 dead transitions. [2024-06-14 12:52:01,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 707 transitions, 11481 flow [2024-06-14 12:52:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:52:01,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-14 12:52:01,609 INFO L175 Difference]: Start difference. First operand has 480 places, 681 transitions, 9625 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:52:01,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 707 transitions, 11481 flow [2024-06-14 12:52:07,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 707 transitions, 11321 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:52:07,740 INFO L231 Difference]: Finished difference. Result has 483 places, 684 transitions, 9841 flow [2024-06-14 12:52:07,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9465, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9841, PETRI_PLACES=483, PETRI_TRANSITIONS=684} [2024-06-14 12:52:07,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-14 12:52:07,741 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 684 transitions, 9841 flow [2024-06-14 12:52:07,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:52:07,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:07,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:07,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:52:07,742 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 12:52:07,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:07,742 INFO L85 PathProgramCache]: Analyzing trace with hash 375129033, now seen corresponding path program 2 times [2024-06-14 12:52:07,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:07,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946149491] [2024-06-14 12:52:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:07,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:08,769 INFO 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 12:52:08,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:08,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946149491] [2024-06-14 12:52:08,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946149491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:08,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:08,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:08,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71054318] [2024-06-14 12:52:08,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:08,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:08,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:08,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:08,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:08,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:08,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 684 transitions, 9841 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:52:08,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:08,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:08,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:11,116 INFO L124 PetriNetUnfolderBase]: 5399/8209 cut-off events. [2024-06-14 12:52:11,117 INFO L125 PetriNetUnfolderBase]: For 1138184/1138192 co-relation queries the response was YES. [2024-06-14 12:52:11,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75763 conditions, 8209 events. 5399/8209 cut-off events. For 1138184/1138192 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 48224 event pairs, 962 based on Foata normal form. 10/8218 useless extension candidates. Maximal degree in co-relation 75537. Up to 8064 conditions per place. [2024-06-14 12:52:11,271 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 645 selfloop transitions, 58 changer transitions 0/706 dead transitions. [2024-06-14 12:52:11,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 706 transitions, 11456 flow [2024-06-14 12:52:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:11,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-14 12:52:11,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 12:52:11,272 INFO L175 Difference]: Start difference. First operand has 483 places, 684 transitions, 9841 flow. Second operand 9 states and 135 transitions. [2024-06-14 12:52:11,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 706 transitions, 11456 flow [2024-06-14 12:52:17,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 706 transitions, 11114 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:17,141 INFO L231 Difference]: Finished difference. Result has 485 places, 688 transitions, 9748 flow [2024-06-14 12:52:17,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9499, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9748, PETRI_PLACES=485, PETRI_TRANSITIONS=688} [2024-06-14 12:52:17,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-14 12:52:17,142 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 688 transitions, 9748 flow [2024-06-14 12:52:17,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:52:17,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:17,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:17,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:52:17,143 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 12:52:17,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:17,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2131729392, now seen corresponding path program 9 times [2024-06-14 12:52:17,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:17,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413314286] [2024-06-14 12:52:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:17,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:18,032 INFO 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 12:52:18,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:18,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413314286] [2024-06-14 12:52:18,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413314286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:18,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:18,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:18,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159611684] [2024-06-14 12:52:18,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:18,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:18,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:18,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:18,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:18,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:18,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 688 transitions, 9748 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:52:18,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:18,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:18,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:20,450 INFO L124 PetriNetUnfolderBase]: 5419/8237 cut-off events. [2024-06-14 12:52:20,450 INFO L125 PetriNetUnfolderBase]: For 1168045/1168053 co-relation queries the response was YES. [2024-06-14 12:52:20,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75863 conditions, 8237 events. 5419/8237 cut-off events. For 1168045/1168053 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 48415 event pairs, 971 based on Foata normal form. 12/8248 useless extension candidates. Maximal degree in co-relation 75636. Up to 8092 conditions per place. [2024-06-14 12:52:20,599 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 652 selfloop transitions, 55 changer transitions 0/710 dead transitions. [2024-06-14 12:52:20,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 710 transitions, 11349 flow [2024-06-14 12:52:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-14 12:52:20,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 12:52:20,601 INFO L175 Difference]: Start difference. First operand has 485 places, 688 transitions, 9748 flow. Second operand 9 states and 135 transitions. [2024-06-14 12:52:20,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 710 transitions, 11349 flow [2024-06-14 12:52:27,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 710 transitions, 11149 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:27,528 INFO L231 Difference]: Finished difference. Result has 487 places, 691 transitions, 9751 flow [2024-06-14 12:52:27,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9548, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9751, PETRI_PLACES=487, PETRI_TRANSITIONS=691} [2024-06-14 12:52:27,528 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-14 12:52:27,528 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 691 transitions, 9751 flow [2024-06-14 12:52:27,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:52:27,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:27,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:27,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:52:27,529 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 12:52:27,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:27,530 INFO L85 PathProgramCache]: Analyzing trace with hash -333048153, now seen corresponding path program 1 times [2024-06-14 12:52:27,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:27,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482457592] [2024-06-14 12:52:27,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:27,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:28,634 INFO 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 12:52:28,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:28,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482457592] [2024-06-14 12:52:28,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482457592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:28,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:28,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:28,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64328065] [2024-06-14 12:52:28,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:28,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:28,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:28,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:28,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:28,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:28,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 691 transitions, 9751 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:52:28,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:28,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:28,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:31,380 INFO L124 PetriNetUnfolderBase]: 5416/8233 cut-off events. [2024-06-14 12:52:31,380 INFO L125 PetriNetUnfolderBase]: For 1161834/1161842 co-relation queries the response was YES. [2024-06-14 12:52:31,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75725 conditions, 8233 events. 5416/8233 cut-off events. For 1161834/1161842 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 48401 event pairs, 1024 based on Foata normal form. 9/8241 useless extension candidates. Maximal degree in co-relation 75497. Up to 8129 conditions per place. [2024-06-14 12:52:31,527 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 648 selfloop transitions, 53 changer transitions 0/704 dead transitions. [2024-06-14 12:52:31,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 704 transitions, 11287 flow [2024-06-14 12:52:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:52:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:52:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-14 12:52:31,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693379790940767 [2024-06-14 12:52:31,529 INFO L175 Difference]: Start difference. First operand has 487 places, 691 transitions, 9751 flow. Second operand 7 states and 106 transitions. [2024-06-14 12:52:31,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 704 transitions, 11287 flow [2024-06-14 12:52:38,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 704 transitions, 11121 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:38,676 INFO L231 Difference]: Finished difference. Result has 487 places, 693 transitions, 9795 flow [2024-06-14 12:52:38,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9585, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9795, PETRI_PLACES=487, PETRI_TRANSITIONS=693} [2024-06-14 12:52:38,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-14 12:52:38,677 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 693 transitions, 9795 flow [2024-06-14 12:52:38,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:52:38,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:38,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:38,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:52:38,677 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 12:52:38,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash -341322115, now seen corresponding path program 2 times [2024-06-14 12:52:38,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:38,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743669555] [2024-06-14 12:52:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:39,561 INFO 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 12:52:39,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:39,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743669555] [2024-06-14 12:52:39,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743669555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:39,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:39,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:52:39,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867199003] [2024-06-14 12:52:39,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:39,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:52:39,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:39,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:52:39,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:52:39,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:39,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 693 transitions, 9795 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 12:52:39,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:39,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:39,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:41,836 INFO L124 PetriNetUnfolderBase]: 5424/8245 cut-off events. [2024-06-14 12:52:41,836 INFO L125 PetriNetUnfolderBase]: For 1186072/1186080 co-relation queries the response was YES. [2024-06-14 12:52:41,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75898 conditions, 8245 events. 5424/8245 cut-off events. For 1186072/1186080 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 48468 event pairs, 1012 based on Foata normal form. 10/8254 useless extension candidates. Maximal degree in co-relation 75669. Up to 8168 conditions per place. [2024-06-14 12:52:41,992 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 671 selfloop transitions, 32 changer transitions 0/706 dead transitions. [2024-06-14 12:52:41,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 706 transitions, 11317 flow [2024-06-14 12:52:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:52:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:52:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-14 12:52:41,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-14 12:52:41,994 INFO L175 Difference]: Start difference. First operand has 487 places, 693 transitions, 9795 flow. Second operand 7 states and 104 transitions. [2024-06-14 12:52:41,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 706 transitions, 11317 flow [2024-06-14 12:52:49,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 706 transitions, 11043 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:49,234 INFO L231 Difference]: Finished difference. Result has 487 places, 695 transitions, 9673 flow [2024-06-14 12:52:49,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9521, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9673, PETRI_PLACES=487, PETRI_TRANSITIONS=695} [2024-06-14 12:52:49,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-14 12:52:49,234 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 695 transitions, 9673 flow [2024-06-14 12:52:49,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 12:52:49,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:49,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:49,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:52:49,235 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 12:52:49,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:49,236 INFO L85 PathProgramCache]: Analyzing trace with hash -332751235, now seen corresponding path program 3 times [2024-06-14 12:52:49,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:49,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763350568] [2024-06-14 12:52:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:49,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:50,190 INFO 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 12:52:50,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:50,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763350568] [2024-06-14 12:52:50,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763350568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:50,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:50,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:50,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757490210] [2024-06-14 12:52:50,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:50,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:50,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:50,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:50,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:50,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:50,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 695 transitions, 9673 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:52:50,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:50,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:50,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:52,695 INFO L124 PetriNetUnfolderBase]: 5432/8257 cut-off events. [2024-06-14 12:52:52,696 INFO L125 PetriNetUnfolderBase]: For 1190038/1190046 co-relation queries the response was YES. [2024-06-14 12:52:52,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75814 conditions, 8257 events. 5432/8257 cut-off events. For 1190038/1190046 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 48524 event pairs, 1007 based on Foata normal form. 10/8266 useless extension candidates. Maximal degree in co-relation 75586. Up to 8167 conditions per place. [2024-06-14 12:52:52,846 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 668 selfloop transitions, 37 changer transitions 0/708 dead transitions. [2024-06-14 12:52:52,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 708 transitions, 11191 flow [2024-06-14 12:52:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:52:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:52:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-14 12:52:52,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-14 12:52:52,860 INFO L175 Difference]: Start difference. First operand has 487 places, 695 transitions, 9673 flow. Second operand 7 states and 104 transitions. [2024-06-14 12:52:52,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 708 transitions, 11191 flow [2024-06-14 12:52:58,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 708 transitions, 11063 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 12:52:58,504 INFO L231 Difference]: Finished difference. Result has 489 places, 697 transitions, 9711 flow [2024-06-14 12:52:58,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9545, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9711, PETRI_PLACES=489, PETRI_TRANSITIONS=697} [2024-06-14 12:52:58,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-14 12:52:58,505 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 697 transitions, 9711 flow [2024-06-14 12:52:58,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:52:58,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:58,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:58,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:52:58,506 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 12:52:58,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:58,506 INFO L85 PathProgramCache]: Analyzing trace with hash -345144291, now seen corresponding path program 3 times [2024-06-14 12:52:58,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:58,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605594414] [2024-06-14 12:52:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:58,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:59,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:59,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605594414] [2024-06-14 12:52:59,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605594414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:59,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:59,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:59,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194198995] [2024-06-14 12:52:59,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:59,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:59,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:59,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:59,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 697 transitions, 9711 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:52:59,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:59,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:59,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:01,665 INFO L124 PetriNetUnfolderBase]: 5426/8255 cut-off events. [2024-06-14 12:53:01,666 INFO L125 PetriNetUnfolderBase]: For 1194439/1194445 co-relation queries the response was YES. [2024-06-14 12:53:01,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75633 conditions, 8255 events. 5426/8255 cut-off events. For 1194439/1194445 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 48555 event pairs, 1055 based on Foata normal form. 8/8262 useless extension candidates. Maximal degree in co-relation 75404. Up to 8030 conditions per place. [2024-06-14 12:53:01,819 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 625 selfloop transitions, 80 changer transitions 0/708 dead transitions. [2024-06-14 12:53:01,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 708 transitions, 11171 flow [2024-06-14 12:53:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:53:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:53:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 12:53:01,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-14 12:53:01,820 INFO L175 Difference]: Start difference. First operand has 489 places, 697 transitions, 9711 flow. Second operand 7 states and 110 transitions. [2024-06-14 12:53:01,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 708 transitions, 11171 flow [2024-06-14 12:53:08,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 708 transitions, 10975 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-14 12:53:08,928 INFO L231 Difference]: Finished difference. Result has 491 places, 697 transitions, 9687 flow [2024-06-14 12:53:08,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9515, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9687, PETRI_PLACES=491, PETRI_TRANSITIONS=697} [2024-06-14 12:53:08,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-14 12:53:08,929 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 697 transitions, 9687 flow [2024-06-14 12:53:08,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:53:08,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:08,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:08,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:53:08,929 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 12:53:08,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:08,930 INFO L85 PathProgramCache]: Analyzing trace with hash -341329059, now seen corresponding path program 3 times [2024-06-14 12:53:08,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:08,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161704499] [2024-06-14 12:53:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:08,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:09,914 INFO 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 12:53:09,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:09,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161704499] [2024-06-14 12:53:09,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161704499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:09,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:09,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:09,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472415994] [2024-06-14 12:53:09,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:09,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:09,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:09,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:53:09,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 697 transitions, 9687 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:53:09,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:09,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:53:09,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:12,460 INFO L124 PetriNetUnfolderBase]: 5420/8241 cut-off events. [2024-06-14 12:53:12,460 INFO L125 PetriNetUnfolderBase]: For 1195594/1195602 co-relation queries the response was YES. [2024-06-14 12:53:12,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75337 conditions, 8241 events. 5420/8241 cut-off events. For 1195594/1195602 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 48498 event pairs, 1023 based on Foata normal form. 10/8250 useless extension candidates. Maximal degree in co-relation 75107. Up to 8144 conditions per place. [2024-06-14 12:53:12,607 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 670 selfloop transitions, 40 changer transitions 0/713 dead transitions. [2024-06-14 12:53:12,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 713 transitions, 11289 flow [2024-06-14 12:53:12,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 12:53:12,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-14 12:53:12,608 INFO L175 Difference]: Start difference. First operand has 491 places, 697 transitions, 9687 flow. Second operand 8 states and 118 transitions. [2024-06-14 12:53:12,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 713 transitions, 11289 flow [2024-06-14 12:53:18,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 713 transitions, 11086 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:53:18,594 INFO L231 Difference]: Finished difference. Result has 492 places, 700 transitions, 9694 flow [2024-06-14 12:53:18,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9484, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9694, PETRI_PLACES=492, PETRI_TRANSITIONS=700} [2024-06-14 12:53:18,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-14 12:53:18,594 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 700 transitions, 9694 flow [2024-06-14 12:53:18,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:53:18,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:18,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:18,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:53:18,595 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 12:53:18,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:18,595 INFO L85 PathProgramCache]: Analyzing trace with hash -950991918, now seen corresponding path program 10 times [2024-06-14 12:53:18,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:18,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980186969] [2024-06-14 12:53:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:18,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:19,475 INFO 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 12:53:19,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:19,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980186969] [2024-06-14 12:53:19,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980186969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:19,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:19,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:19,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815643305] [2024-06-14 12:53:19,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:19,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:19,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:19,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:19,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:19,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:53:19,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 700 transitions, 9694 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:53:19,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:19,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:53:19,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:21,829 INFO L124 PetriNetUnfolderBase]: 5408/8225 cut-off events. [2024-06-14 12:53:21,829 INFO L125 PetriNetUnfolderBase]: For 1181813/1181821 co-relation queries the response was YES. [2024-06-14 12:53:21,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74645 conditions, 8225 events. 5408/8225 cut-off events. For 1181813/1181821 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 48373 event pairs, 1019 based on Foata normal form. 12/8236 useless extension candidates. Maximal degree in co-relation 74415. Up to 8128 conditions per place. [2024-06-14 12:53:21,991 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 674 selfloop transitions, 37 changer transitions 0/714 dead transitions. [2024-06-14 12:53:21,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 714 transitions, 11196 flow [2024-06-14 12:53:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:21,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 12:53:21,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-14 12:53:21,992 INFO L175 Difference]: Start difference. First operand has 492 places, 700 transitions, 9694 flow. Second operand 8 states and 118 transitions. [2024-06-14 12:53:21,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 714 transitions, 11196 flow [2024-06-14 12:53:28,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 714 transitions, 10970 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-14 12:53:28,252 INFO L231 Difference]: Finished difference. Result has 494 places, 700 transitions, 9548 flow [2024-06-14 12:53:28,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9468, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9548, PETRI_PLACES=494, PETRI_TRANSITIONS=700} [2024-06-14 12:53:28,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-14 12:53:28,253 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 700 transitions, 9548 flow [2024-06-14 12:53:28,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:53:28,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:28,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:28,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:53:28,253 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 12:53:28,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:28,254 INFO L85 PathProgramCache]: Analyzing trace with hash -341334856, now seen corresponding path program 11 times [2024-06-14 12:53:28,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:28,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279928041] [2024-06-14 12:53:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:28,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:29,126 INFO 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 12:53:29,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:29,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279928041] [2024-06-14 12:53:29,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279928041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:29,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:29,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:29,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090369123] [2024-06-14 12:53:29,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:29,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:29,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:29,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:53:29,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 700 transitions, 9548 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:53:29,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:29,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:53:29,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:31,462 INFO L124 PetriNetUnfolderBase]: 5396/8215 cut-off events. [2024-06-14 12:53:31,462 INFO L125 PetriNetUnfolderBase]: For 1169030/1169036 co-relation queries the response was YES. [2024-06-14 12:53:31,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73871 conditions, 8215 events. 5396/8215 cut-off events. For 1169030/1169036 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 48376 event pairs, 1026 based on Foata normal form. 10/8224 useless extension candidates. Maximal degree in co-relation 73640. Up to 7879 conditions per place. [2024-06-14 12:53:31,619 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 610 selfloop transitions, 104 changer transitions 0/717 dead transitions. [2024-06-14 12:53:31,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 717 transitions, 11324 flow [2024-06-14 12:53:31,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:31,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:53:31,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 12:53:31,621 INFO L175 Difference]: Start difference. First operand has 494 places, 700 transitions, 9548 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:53:31,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 717 transitions, 11324 flow [2024-06-14 12:53:38,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 717 transitions, 11190 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:53:38,911 INFO L231 Difference]: Finished difference. Result has 496 places, 700 transitions, 9628 flow [2024-06-14 12:53:38,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9414, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9628, PETRI_PLACES=496, PETRI_TRANSITIONS=700} [2024-06-14 12:53:38,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-14 12:53:38,912 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 700 transitions, 9628 flow [2024-06-14 12:53:38,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:53:38,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:38,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:38,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:53:38,912 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 12:53:38,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:38,913 INFO L85 PathProgramCache]: Analyzing trace with hash -344786799, now seen corresponding path program 2 times [2024-06-14 12:53:38,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:38,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793552316] [2024-06-14 12:53:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:38,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:39,795 INFO 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 12:53:39,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:39,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793552316] [2024-06-14 12:53:39,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793552316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:39,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:39,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:39,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268237980] [2024-06-14 12:53:39,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:39,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:39,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:39,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:39,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:39,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:53:39,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 700 transitions, 9628 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:53:39,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:39,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:53:39,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:42,299 INFO L124 PetriNetUnfolderBase]: 5398/8218 cut-off events. [2024-06-14 12:53:42,299 INFO L125 PetriNetUnfolderBase]: For 1164373/1164379 co-relation queries the response was YES. [2024-06-14 12:53:42,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74012 conditions, 8218 events. 5398/8218 cut-off events. For 1164373/1164379 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 48363 event pairs, 1054 based on Foata normal form. 8/8225 useless extension candidates. Maximal degree in co-relation 73780. Up to 7997 conditions per place. [2024-06-14 12:53:42,451 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 631 selfloop transitions, 80 changer transitions 0/714 dead transitions. [2024-06-14 12:53:42,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 714 transitions, 11216 flow [2024-06-14 12:53:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:53:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:53:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 12:53:42,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-14 12:53:42,452 INFO L175 Difference]: Start difference. First operand has 496 places, 700 transitions, 9628 flow. Second operand 7 states and 109 transitions. [2024-06-14 12:53:42,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 714 transitions, 11216 flow [2024-06-14 12:53:49,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 714 transitions, 10996 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:53:49,149 INFO L231 Difference]: Finished difference. Result has 497 places, 703 transitions, 9702 flow [2024-06-14 12:53:49,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9414, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9702, PETRI_PLACES=497, PETRI_TRANSITIONS=703} [2024-06-14 12:53:49,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-14 12:53:49,150 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 703 transitions, 9702 flow [2024-06-14 12:53:49,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:53:49,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:49,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:49,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:53:49,151 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 12:53:49,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:49,151 INFO L85 PathProgramCache]: Analyzing trace with hash -954716568, now seen corresponding path program 12 times [2024-06-14 12:53:49,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:49,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946296490] [2024-06-14 12:53:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:49,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:50,064 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 12:53:50,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:50,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946296490] [2024-06-14 12:53:50,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946296490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:50,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:50,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:50,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516426007] [2024-06-14 12:53:50,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:50,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:50,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:50,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:50,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:50,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:53:50,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 703 transitions, 9702 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:53:50,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:50,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:53:50,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:52,403 INFO L124 PetriNetUnfolderBase]: 5386/8202 cut-off events. [2024-06-14 12:53:52,404 INFO L125 PetriNetUnfolderBase]: For 1164724/1164730 co-relation queries the response was YES. [2024-06-14 12:53:52,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73407 conditions, 8202 events. 5386/8202 cut-off events. For 1164724/1164730 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 48297 event pairs, 1048 based on Foata normal form. 10/8211 useless extension candidates. Maximal degree in co-relation 73174. Up to 7969 conditions per place. [2024-06-14 12:53:52,564 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 634 selfloop transitions, 80 changer transitions 0/717 dead transitions. [2024-06-14 12:53:52,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 717 transitions, 11208 flow [2024-06-14 12:53:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 12:53:52,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-14 12:53:52,565 INFO L175 Difference]: Start difference. First operand has 497 places, 703 transitions, 9702 flow. Second operand 8 states and 122 transitions. [2024-06-14 12:53:52,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 717 transitions, 11208 flow [2024-06-14 12:53:59,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 717 transitions, 10926 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-14 12:53:59,872 INFO L231 Difference]: Finished difference. Result has 500 places, 703 transitions, 9586 flow [2024-06-14 12:53:59,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9420, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9586, PETRI_PLACES=500, PETRI_TRANSITIONS=703} [2024-06-14 12:53:59,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-14 12:53:59,872 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 703 transitions, 9586 flow [2024-06-14 12:53:59,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:53:59,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:59,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:59,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:53:59,873 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 12:53:59,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:59,873 INFO L85 PathProgramCache]: Analyzing trace with hash -942710547, now seen corresponding path program 4 times [2024-06-14 12:53:59,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:59,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251660584] [2024-06-14 12:53:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:59,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:00,820 INFO 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 12:54:00,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:00,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251660584] [2024-06-14 12:54:00,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251660584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:00,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:00,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:00,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076926111] [2024-06-14 12:54:00,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:00,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:00,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:00,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:00,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:00,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:54:00,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 703 transitions, 9586 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:54:00,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:00,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:54:00,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:03,235 INFO L124 PetriNetUnfolderBase]: 5394/8208 cut-off events. [2024-06-14 12:54:03,235 INFO L125 PetriNetUnfolderBase]: For 1165976/1165984 co-relation queries the response was YES. [2024-06-14 12:54:03,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73478 conditions, 8208 events. 5394/8208 cut-off events. For 1165976/1165984 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 48325 event pairs, 1019 based on Foata normal form. 10/8217 useless extension candidates. Maximal degree in co-relation 73244. Up to 8102 conditions per place. [2024-06-14 12:54:03,388 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 664 selfloop transitions, 49 changer transitions 0/716 dead transitions. [2024-06-14 12:54:03,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 716 transitions, 11136 flow [2024-06-14 12:54:03,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:54:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:54:03,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-14 12:54:03,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 12:54:03,389 INFO L175 Difference]: Start difference. First operand has 500 places, 703 transitions, 9586 flow. Second operand 7 states and 105 transitions. [2024-06-14 12:54:03,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 716 transitions, 11136 flow [2024-06-14 12:54:09,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 716 transitions, 10944 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:54:09,249 INFO L231 Difference]: Finished difference. Result has 500 places, 705 transitions, 9594 flow [2024-06-14 12:54:09,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9394, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9594, PETRI_PLACES=500, PETRI_TRANSITIONS=705} [2024-06-14 12:54:09,250 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-14 12:54:09,250 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 705 transitions, 9594 flow [2024-06-14 12:54:09,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:54:09,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:09,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:54:09,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:54:09,251 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 12:54:09,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:09,251 INFO L85 PathProgramCache]: Analyzing trace with hash -858396757, now seen corresponding path program 4 times [2024-06-14 12:54:09,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:09,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129696715] [2024-06-14 12:54:09,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:09,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:10,417 INFO 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 12:54:10,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:10,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129696715] [2024-06-14 12:54:10,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129696715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:10,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:10,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:10,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38967481] [2024-06-14 12:54:10,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:10,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:10,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:10,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:10,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:10,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:54:10,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 705 transitions, 9594 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:54:10,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:10,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:54:10,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:13,098 INFO L124 PetriNetUnfolderBase]: 5404/8222 cut-off events. [2024-06-14 12:54:13,099 INFO L125 PetriNetUnfolderBase]: For 1185268/1185276 co-relation queries the response was YES. [2024-06-14 12:54:13,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73821 conditions, 8222 events. 5404/8222 cut-off events. For 1185268/1185276 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 48403 event pairs, 1033 based on Foata normal form. 10/8231 useless extension candidates. Maximal degree in co-relation 73586. Up to 8000 conditions per place. [2024-06-14 12:54:13,239 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 654 selfloop transitions, 73 changer transitions 0/730 dead transitions. [2024-06-14 12:54:13,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 730 transitions, 11262 flow [2024-06-14 12:54:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:54:13,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:54:13,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 12:54:13,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-14 12:54:13,240 INFO L175 Difference]: Start difference. First operand has 500 places, 705 transitions, 9594 flow. Second operand 9 states and 137 transitions. [2024-06-14 12:54:13,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 730 transitions, 11262 flow [2024-06-14 12:54:18,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 730 transitions, 11094 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 12:54:18,753 INFO L231 Difference]: Finished difference. Result has 504 places, 708 transitions, 9712 flow [2024-06-14 12:54:18,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9428, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9712, PETRI_PLACES=504, PETRI_TRANSITIONS=708} [2024-06-14 12:54:18,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-14 12:54:18,753 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 708 transitions, 9712 flow [2024-06-14 12:54:18,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:54:18,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:18,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:54:18,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:54:18,754 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 12:54:18,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:18,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1929954380, now seen corresponding path program 13 times [2024-06-14 12:54:18,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:18,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297066565] [2024-06-14 12:54:18,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:18,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:19,877 INFO 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 12:54:19,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:19,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297066565] [2024-06-14 12:54:19,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297066565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:19,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:19,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:19,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143121652] [2024-06-14 12:54:19,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:19,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:19,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:19,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:19,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:20,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:54:20,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 708 transitions, 9712 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:54:20,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:20,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:54:20,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:23,250 INFO L124 PetriNetUnfolderBase]: 5683/8612 cut-off events. [2024-06-14 12:54:23,250 INFO L125 PetriNetUnfolderBase]: For 1418712/1418720 co-relation queries the response was YES. [2024-06-14 12:54:23,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80489 conditions, 8612 events. 5683/8612 cut-off events. For 1418712/1418720 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 50790 event pairs, 1010 based on Foata normal form. 20/8631 useless extension candidates. Maximal degree in co-relation 80253. Up to 7616 conditions per place. [2024-06-14 12:54:23,402 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 618 selfloop transitions, 152 changer transitions 0/773 dead transitions. [2024-06-14 12:54:23,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 773 transitions, 12603 flow [2024-06-14 12:54:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:54:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:54:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-14 12:54:23,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-14 12:54:23,403 INFO L175 Difference]: Start difference. First operand has 504 places, 708 transitions, 9712 flow. Second operand 11 states and 184 transitions. [2024-06-14 12:54:23,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 773 transitions, 12603 flow [2024-06-14 12:54:30,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 773 transitions, 12341 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-14 12:54:30,291 INFO L231 Difference]: Finished difference. Result has 510 places, 737 transitions, 10496 flow [2024-06-14 12:54:30,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9450, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10496, PETRI_PLACES=510, PETRI_TRANSITIONS=737} [2024-06-14 12:54:30,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-14 12:54:30,292 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 737 transitions, 10496 flow [2024-06-14 12:54:30,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:54:30,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:30,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:54:30,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:54:30,292 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 12:54:30,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:30,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1929626090, now seen corresponding path program 14 times [2024-06-14 12:54:30,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:30,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499838646] [2024-06-14 12:54:30,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:30,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:31,397 INFO 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 12:54:31,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:31,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499838646] [2024-06-14 12:54:31,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499838646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:31,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:31,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:31,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473489449] [2024-06-14 12:54:31,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:31,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:31,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:31,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:31,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:54:31,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 737 transitions, 10496 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:54:31,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:31,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:54:31,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:34,360 INFO L124 PetriNetUnfolderBase]: 5655/8576 cut-off events. [2024-06-14 12:54:34,361 INFO L125 PetriNetUnfolderBase]: For 1358997/1359005 co-relation queries the response was YES. [2024-06-14 12:54:34,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80010 conditions, 8576 events. 5655/8576 cut-off events. For 1358997/1359005 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 50614 event pairs, 1015 based on Foata normal form. 20/8595 useless extension candidates. Maximal degree in co-relation 79771. Up to 7604 conditions per place. [2024-06-14 12:54:34,507 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 616 selfloop transitions, 145 changer transitions 0/764 dead transitions. [2024-06-14 12:54:34,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 764 transitions, 12406 flow [2024-06-14 12:54:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:54:34,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:54:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:54:34,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-14 12:54:34,509 INFO L175 Difference]: Start difference. First operand has 510 places, 737 transitions, 10496 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:54:34,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 764 transitions, 12406 flow [2024-06-14 12:54:42,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 764 transitions, 11920 flow, removed 214 selfloop flow, removed 5 redundant places. [2024-06-14 12:54:42,061 INFO L231 Difference]: Finished difference. Result has 514 places, 737 transitions, 10312 flow [2024-06-14 12:54:42,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10010, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10312, PETRI_PLACES=514, PETRI_TRANSITIONS=737} [2024-06-14 12:54:42,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-14 12:54:42,062 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 737 transitions, 10312 flow [2024-06-14 12:54:42,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:54:42,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:42,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:54:42,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:54:42,062 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 12:54:42,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:42,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1631980046, now seen corresponding path program 15 times [2024-06-14 12:54:42,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:42,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540062705] [2024-06-14 12:54:42,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:42,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:43,125 INFO 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 12:54:43,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:43,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540062705] [2024-06-14 12:54:43,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540062705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:43,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:43,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:43,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143482942] [2024-06-14 12:54:43,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:43,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:43,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:43,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:43,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:43,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:54:43,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 737 transitions, 10312 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:54:43,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:43,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:54:43,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:46,316 INFO L124 PetriNetUnfolderBase]: 5707/8654 cut-off events. [2024-06-14 12:54:46,317 INFO L125 PetriNetUnfolderBase]: For 1335190/1335196 co-relation queries the response was YES. [2024-06-14 12:54:46,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80266 conditions, 8654 events. 5707/8654 cut-off events. For 1335190/1335196 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 51093 event pairs, 997 based on Foata normal form. 10/8663 useless extension candidates. Maximal degree in co-relation 80027. Up to 8301 conditions per place. [2024-06-14 12:54:46,587 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 706 selfloop transitions, 69 changer transitions 0/778 dead transitions. [2024-06-14 12:54:46,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 778 transitions, 12558 flow [2024-06-14 12:54:46,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:54:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:54:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-14 12:54:46,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37915742793791574 [2024-06-14 12:54:46,588 INFO L175 Difference]: Start difference. First operand has 514 places, 737 transitions, 10312 flow. Second operand 11 states and 171 transitions. [2024-06-14 12:54:46,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 778 transitions, 12558 flow [2024-06-14 12:54:54,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 778 transitions, 12268 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:54:54,614 INFO L231 Difference]: Finished difference. Result has 517 places, 743 transitions, 10424 flow [2024-06-14 12:54:54,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10022, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10424, PETRI_PLACES=517, PETRI_TRANSITIONS=743} [2024-06-14 12:54:54,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 475 predicate places. [2024-06-14 12:54:54,615 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 743 transitions, 10424 flow [2024-06-14 12:54:54,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:54:54,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:54,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:54:54,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:54:54,615 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 12:54:54,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:54,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1626300536, now seen corresponding path program 16 times [2024-06-14 12:54:54,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:54,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051555916] [2024-06-14 12:54:54,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:54,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:55,642 INFO 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 12:54:55,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:55,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051555916] [2024-06-14 12:54:55,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051555916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:55,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:55,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:55,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250153294] [2024-06-14 12:54:55,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:55,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:55,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:55,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:55,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:55,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:54:55,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 743 transitions, 10424 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:54:55,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:55,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:54:55,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:58,631 INFO L124 PetriNetUnfolderBase]: 5759/8720 cut-off events. [2024-06-14 12:54:58,632 INFO L125 PetriNetUnfolderBase]: For 1398964/1398972 co-relation queries the response was YES. [2024-06-14 12:54:58,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82034 conditions, 8720 events. 5759/8720 cut-off events. For 1398964/1398972 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 51444 event pairs, 1093 based on Foata normal form. 12/8731 useless extension candidates. Maximal degree in co-relation 81794. Up to 8548 conditions per place. [2024-06-14 12:54:58,793 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 728 selfloop transitions, 49 changer transitions 0/780 dead transitions. [2024-06-14 12:54:58,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 780 transitions, 12650 flow [2024-06-14 12:54:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:54:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:54:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-14 12:54:58,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 12:54:58,794 INFO L175 Difference]: Start difference. First operand has 517 places, 743 transitions, 10424 flow. Second operand 10 states and 155 transitions. [2024-06-14 12:54:58,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 780 transitions, 12650 flow [2024-06-14 12:55:08,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 780 transitions, 12374 flow, removed 93 selfloop flow, removed 8 redundant places. [2024-06-14 12:55:08,177 INFO L231 Difference]: Finished difference. Result has 519 places, 749 transitions, 10522 flow [2024-06-14 12:55:08,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10148, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10522, PETRI_PLACES=519, PETRI_TRANSITIONS=749} [2024-06-14 12:55:08,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 477 predicate places. [2024-06-14 12:55:08,178 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 749 transitions, 10522 flow [2024-06-14 12:55:08,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:55:08,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:08,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:08,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 12:55:08,178 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:08,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:08,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1631830316, now seen corresponding path program 17 times [2024-06-14 12:55:08,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:08,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496340664] [2024-06-14 12:55:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:08,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:09,232 INFO 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 12:55:09,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:09,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496340664] [2024-06-14 12:55:09,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496340664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:09,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:09,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:55:09,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012858620] [2024-06-14 12:55:09,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:09,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:55:09,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:09,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:55:09,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:55:09,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:55:09,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 749 transitions, 10522 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:55:09,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:09,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:55:09,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:12,509 INFO L124 PetriNetUnfolderBase]: 5779/8754 cut-off events. [2024-06-14 12:55:12,509 INFO L125 PetriNetUnfolderBase]: For 1419551/1419557 co-relation queries the response was YES. [2024-06-14 12:55:12,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82337 conditions, 8754 events. 5779/8754 cut-off events. For 1419551/1419557 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 51676 event pairs, 1015 based on Foata normal form. 10/8763 useless extension candidates. Maximal degree in co-relation 82096. Up to 8456 conditions per place. [2024-06-14 12:55:12,826 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 717 selfloop transitions, 63 changer transitions 0/783 dead transitions. [2024-06-14 12:55:12,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 783 transitions, 12332 flow [2024-06-14 12:55:12,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:55:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:55:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-14 12:55:12,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36807095343680707 [2024-06-14 12:55:12,827 INFO L175 Difference]: Start difference. First operand has 519 places, 749 transitions, 10522 flow. Second operand 11 states and 166 transitions. [2024-06-14 12:55:12,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 783 transitions, 12332 flow [2024-06-14 12:55:20,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 783 transitions, 12099 flow, removed 92 selfloop flow, removed 6 redundant places. [2024-06-14 12:55:20,091 INFO L231 Difference]: Finished difference. Result has 524 places, 752 transitions, 10499 flow [2024-06-14 12:55:20,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10289, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10499, PETRI_PLACES=524, PETRI_TRANSITIONS=752} [2024-06-14 12:55:20,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 482 predicate places. [2024-06-14 12:55:20,092 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 752 transitions, 10499 flow [2024-06-14 12:55:20,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:55:20,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:20,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:20,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 12:55:20,093 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:20,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:20,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1626289376, now seen corresponding path program 18 times [2024-06-14 12:55:20,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:20,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786517573] [2024-06-14 12:55:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:20,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:21,093 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 12:55:21,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:21,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786517573] [2024-06-14 12:55:21,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786517573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:21,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:21,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:55:21,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594770435] [2024-06-14 12:55:21,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:21,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:55:21,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:21,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:55:21,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:55:21,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:55:21,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 752 transitions, 10499 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:55:21,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:21,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:55:21,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:24,057 INFO L124 PetriNetUnfolderBase]: 5799/8776 cut-off events. [2024-06-14 12:55:24,057 INFO L125 PetriNetUnfolderBase]: For 1434795/1434803 co-relation queries the response was YES. [2024-06-14 12:55:24,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82464 conditions, 8776 events. 5799/8776 cut-off events. For 1434795/1434803 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 51796 event pairs, 1100 based on Foata normal form. 12/8787 useless extension candidates. Maximal degree in co-relation 82221. Up to 8592 conditions per place. [2024-06-14 12:55:24,205 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 730 selfloop transitions, 51 changer transitions 0/784 dead transitions. [2024-06-14 12:55:24,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 784 transitions, 12555 flow [2024-06-14 12:55:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:55:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:55:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-14 12:55:24,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-14 12:55:24,206 INFO L175 Difference]: Start difference. First operand has 524 places, 752 transitions, 10499 flow. Second operand 10 states and 154 transitions. [2024-06-14 12:55:24,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 784 transitions, 12555 flow [2024-06-14 12:55:32,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 784 transitions, 12373 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-14 12:55:32,157 INFO L231 Difference]: Finished difference. Result has 525 places, 755 transitions, 10505 flow [2024-06-14 12:55:32,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10317, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10505, PETRI_PLACES=525, PETRI_TRANSITIONS=755} [2024-06-14 12:55:32,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-14 12:55:32,158 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 755 transitions, 10505 flow [2024-06-14 12:55:32,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:55:32,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:32,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:32,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 12:55:32,158 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:32,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:32,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1929625873, now seen corresponding path program 5 times [2024-06-14 12:55:32,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:32,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403831786] [2024-06-14 12:55:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:32,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:33,238 INFO 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 12:55:33,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:33,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403831786] [2024-06-14 12:55:33,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403831786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:33,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:33,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:55:33,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37221410] [2024-06-14 12:55:33,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:33,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:55:33,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:33,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:55:33,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:55:33,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:55:33,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 755 transitions, 10505 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:55:33,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:33,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:55:33,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:36,241 INFO L124 PetriNetUnfolderBase]: 5819/8804 cut-off events. [2024-06-14 12:55:36,242 INFO L125 PetriNetUnfolderBase]: For 1452755/1452763 co-relation queries the response was YES. [2024-06-14 12:55:36,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82917 conditions, 8804 events. 5819/8804 cut-off events. For 1452755/1452763 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 52027 event pairs, 1117 based on Foata normal form. 12/8815 useless extension candidates. Maximal degree in co-relation 82673. Up to 8510 conditions per place. [2024-06-14 12:55:36,408 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 695 selfloop transitions, 86 changer transitions 0/784 dead transitions. [2024-06-14 12:55:36,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 784 transitions, 12641 flow [2024-06-14 12:55:36,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:55:36,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:55:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 12:55:36,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-14 12:55:36,409 INFO L175 Difference]: Start difference. First operand has 525 places, 755 transitions, 10505 flow. Second operand 9 states and 143 transitions. [2024-06-14 12:55:36,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 784 transitions, 12641 flow [2024-06-14 12:55:42,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 784 transitions, 12487 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 12:55:42,908 INFO L231 Difference]: Finished difference. Result has 528 places, 760 transitions, 10749 flow [2024-06-14 12:55:42,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10351, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10749, PETRI_PLACES=528, PETRI_TRANSITIONS=760} [2024-06-14 12:55:42,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-14 12:55:42,909 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 760 transitions, 10749 flow [2024-06-14 12:55:42,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:55:42,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:42,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:42,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 12:55:42,910 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:42,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:42,910 INFO L85 PathProgramCache]: Analyzing trace with hash -404626931, now seen corresponding path program 6 times [2024-06-14 12:55:42,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:42,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101419240] [2024-06-14 12:55:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:42,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:43,917 INFO 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 12:55:43,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:43,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101419240] [2024-06-14 12:55:43,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101419240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:43,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:43,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:55:43,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117622956] [2024-06-14 12:55:43,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:43,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:55:43,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:43,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:55:43,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:55:44,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:55:44,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 760 transitions, 10749 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:55:44,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:44,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:55:44,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:47,085 INFO L124 PetriNetUnfolderBase]: 5871/8876 cut-off events. [2024-06-14 12:55:47,086 INFO L125 PetriNetUnfolderBase]: For 1518086/1518094 co-relation queries the response was YES. [2024-06-14 12:55:47,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85343 conditions, 8876 events. 5871/8876 cut-off events. For 1518086/1518094 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 52385 event pairs, 1121 based on Foata normal form. 12/8887 useless extension candidates. Maximal degree in co-relation 85097. Up to 8688 conditions per place. [2024-06-14 12:55:47,278 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 734 selfloop transitions, 58 changer transitions 0/795 dead transitions. [2024-06-14 12:55:47,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 795 transitions, 13071 flow [2024-06-14 12:55:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:55:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:55:47,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-14 12:55:47,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-14 12:55:47,281 INFO L175 Difference]: Start difference. First operand has 528 places, 760 transitions, 10749 flow. Second operand 10 states and 154 transitions. [2024-06-14 12:55:47,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 795 transitions, 13071 flow [2024-06-14 12:55:56,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 795 transitions, 12833 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 12:55:56,489 INFO L231 Difference]: Finished difference. Result has 533 places, 766 transitions, 10919 flow [2024-06-14 12:55:56,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10511, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10919, PETRI_PLACES=533, PETRI_TRANSITIONS=766} [2024-06-14 12:55:56,490 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-14 12:55:56,490 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 766 transitions, 10919 flow [2024-06-14 12:55:56,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:55:56,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:56,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:56,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 12:55:56,491 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:56,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:56,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1545574003, now seen corresponding path program 7 times [2024-06-14 12:55:56,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:56,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992643825] [2024-06-14 12:55:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:56,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:57,538 INFO 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 12:55:57,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:57,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992643825] [2024-06-14 12:55:57,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992643825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:57,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:57,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:55:57,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129060865] [2024-06-14 12:55:57,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:57,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:55:57,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:57,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:55:57,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:55:57,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:55:57,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 766 transitions, 10919 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 12:55:57,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:57,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:55:57,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:00,653 INFO L124 PetriNetUnfolderBase]: 5905/8923 cut-off events. [2024-06-14 12:56:00,653 INFO L125 PetriNetUnfolderBase]: For 1561111/1561119 co-relation queries the response was YES. [2024-06-14 12:56:00,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86801 conditions, 8923 events. 5905/8923 cut-off events. For 1561111/1561119 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 52739 event pairs, 998 based on Foata normal form. 10/8932 useless extension candidates. Maximal degree in co-relation 86555. Up to 8384 conditions per place. [2024-06-14 12:56:00,821 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 652 selfloop transitions, 152 changer transitions 0/807 dead transitions. [2024-06-14 12:56:00,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 807 transitions, 13897 flow [2024-06-14 12:56:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:56:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:56:00,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:56:00,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:56:00,823 INFO L175 Difference]: Start difference. First operand has 533 places, 766 transitions, 10919 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:56:00,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 807 transitions, 13897 flow