./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 bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/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-bcb38a6-m [2024-06-03 19:59:58,825 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:59:58,888 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:59:58,894 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:59:58,894 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:59:58,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:59:58,917 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:59:58,917 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:59:58,918 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:59:58,921 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:59:58,921 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:59:58,921 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:59:58,922 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:59:58,923 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:59:58,923 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:59:58,923 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:59:58,923 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:59:58,923 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:59:58,924 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:59:58,924 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:59:58,924 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:59:58,924 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:59:58,924 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:59:58,924 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:59:58,925 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:59:58,925 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:59:58,925 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:59:58,925 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:59:58,925 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:59:58,925 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:59:58,926 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:59:58,926 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:59:58,926 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:59:58,927 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:59:58,927 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:59:58,927 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:59:58,927 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:59:58,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:59:58,927 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:59:58,927 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:59:58,927 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:59:58,928 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:59:58,928 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:59:58,928 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:59:59,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:59:59,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:59:59,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:59:59,131 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:59:59,131 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:59:59,132 INFO L431 ainManager$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 [2024-06-03 20:00:00,178 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:00:00,397 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:00:00,398 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:00:00,410 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edfb00169/77fc77e8f1fe457ba5d501d7d7dcd371/FLAG5da16f223 [2024-06-03 20:00:00,421 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edfb00169/77fc77e8f1fe457ba5d501d7d7dcd371 [2024-06-03 20:00:00,425 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:00:00,426 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:00:00,426 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-03 20:00:00,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:00:00,536 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:00:00,537 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:00:00,537 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:00:00,541 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:00:00,541 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:00:00" (1/2) ... [2024-06-03 20:00:00,542 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@544aa658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:00:00, skipping insertion in model container [2024-06-03 20:00:00,542 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:00:00" (1/2) ... [2024-06-03 20:00:00,543 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b31eea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:00:00, skipping insertion in model container [2024-06-03 20:00:00,544 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:00:00" (2/2) ... [2024-06-03 20:00:00,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@544aa658 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:00, skipping insertion in model container [2024-06-03 20:00:00,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:00:00" (2/2) ... [2024-06-03 20:00:00,544 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:00:00,612 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:00:00,614 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$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) [2024-06-03 20:00:00,614 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((! multithreaded || y$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))) [2024-06-03 20:00:00,614 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))) [2024-06-03 20:00:00,614 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:00:00,614 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-03 20:00:00,648 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:00:00,902 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:00:00,909 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:00:01,048 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:00:01,101 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:00:01,101 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:01 WrapperNode [2024-06-03 20:00:01,101 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:00:01,102 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:00:01,102 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:00:01,102 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:00:01,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:01" (1/1) ... [2024-06-03 20:00:01,120 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:01" (1/1) ... [2024-06-03 20:00:01,177 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 166 [2024-06-03 20:00:01,177 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:00:01,178 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:00:01,178 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:00:01,178 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:00:01,186 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:01" (1/1) ... [2024-06-03 20:00:01,186 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:01" (1/1) ... [2024-06-03 20:00:01,191 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:01" (1/1) ... [2024-06-03 20:00:01,231 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]. [2024-06-03 20:00:01,231 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:01" (1/1) ... [2024-06-03 20:00:01,232 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:01" (1/1) ... [2024-06-03 20:00:01,239 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:01" (1/1) ... [2024-06-03 20:00:01,240 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:01" (1/1) ... [2024-06-03 20:00:01,241 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:01" (1/1) ... [2024-06-03 20:00:01,243 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:01" (1/1) ... [2024-06-03 20:00:01,245 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:00:01,246 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:00:01,246 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:00:01,246 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:00:01,247 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:01" (1/1) ... [2024-06-03 20:00:01,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:00:01,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:00:01,290 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) [2024-06-03 20:00:01,308 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 [2024-06-03 20:00:01,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:00:01,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:00:01,323 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:00:01,323 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:00:01,323 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:00:01,323 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:00:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:00:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:00:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:00:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:00:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:00:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:00:01,325 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:00:01,466 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:00:01,468 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:00:01,787 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:00:01,788 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:00:01,947 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:00:01,948 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:00:01,948 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:00:01 BoogieIcfgContainer [2024-06-03 20:00:01,948 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:00:01,950 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:00:01,950 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:00:01,953 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:00:01,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:00:00" (1/4) ... [2024-06-03 20:00:01,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e9aedc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:00:01, skipping insertion in model container [2024-06-03 20:00:01,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:00:00" (2/4) ... [2024-06-03 20:00:01,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e9aedc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:00:01, skipping insertion in model container [2024-06-03 20:00:01,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:00:01" (3/4) ... [2024-06-03 20:00:01,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e9aedc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:00:01, skipping insertion in model container [2024-06-03 20:00:01,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:00:01" (4/4) ... [2024-06-03 20:00:01,956 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:00:01,968 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:00:01,968 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:00:01,968 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:00:02,006 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:00:02,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:00:02,060 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-03 20:00:02,061 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:00:02,062 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. [2024-06-03 20:00:02,062 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:00:02,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-03 20:00:02,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:00:02,075 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;@26712fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:00:02,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:00:02,078 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:00:02,078 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:00:02,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:00:02,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:02,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:00:02,079 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)] === [2024-06-03 20:00:02,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:02,082 INFO L85 PathProgramCache]: Analyzing trace with hash -379355684, now seen corresponding path program 1 times [2024-06-03 20:00:02,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:02,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314573925] [2024-06-03 20:00:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:02,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:03,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:03,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314573925] [2024-06-03 20:00:03,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314573925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:03,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:03,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:00:03,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479880459] [2024-06-03 20:00:03,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:03,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:00:03,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:03,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:00:03,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:00:03,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:00:03,313 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) [2024-06-03 20:00:03,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:03,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:00:03,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:03,640 INFO L124 PetriNetUnfolderBase]: 1152/1771 cut-off events. [2024-06-03 20:00:03,641 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-03 20:00:03,645 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. [2024-06-03 20:00:03,652 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 33 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-03 20:00:03,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 173 flow [2024-06-03 20:00:03,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:00:03,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:00:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-03 20:00:03,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-03 20:00:03,662 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 70 transitions. [2024-06-03 20:00:03,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 173 flow [2024-06-03 20:00:03,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:00:03,665 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-03 20:00:03,667 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} [2024-06-03 20:00:03,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-03 20:00:03,669 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-03 20:00:03,669 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) [2024-06-03 20:00:03,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:03,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:03,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:00:03,670 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)] === [2024-06-03 20:00:03,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:03,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1325232245, now seen corresponding path program 1 times [2024-06-03 20:00:03,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:03,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835048654] [2024-06-03 20:00:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:03,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:04,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:04,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835048654] [2024-06-03 20:00:04,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835048654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:04,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:04,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:00:04,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152366778] [2024-06-03 20:00:04,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:04,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:00:04,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:04,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:00:04,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:00:04,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:00:04,404 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) [2024-06-03 20:00:04,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:04,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:00:04,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:04,669 INFO L124 PetriNetUnfolderBase]: 1389/2125 cut-off events. [2024-06-03 20:00:04,670 INFO L125 PetriNetUnfolderBase]: For 400/404 co-relation queries the response was YES. [2024-06-03 20:00:04,672 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. [2024-06-03 20:00:04,679 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 43 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-03 20:00:04,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 250 flow [2024-06-03 20:00:04,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:00:04,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:00:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-03 20:00:04,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-03 20:00:04,681 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 89 transitions. [2024-06-03 20:00:04,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 250 flow [2024-06-03 20:00:04,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:00:04,682 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-03 20:00:04,682 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} [2024-06-03 20:00:04,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-03 20:00:04,683 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-03 20:00:04,683 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) [2024-06-03 20:00:04,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:04,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:04,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:00:04,684 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)] === [2024-06-03 20:00:04,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:04,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2025860968, now seen corresponding path program 1 times [2024-06-03 20:00:04,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:04,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213391721] [2024-06-03 20:00:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:04,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:05,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:05,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213391721] [2024-06-03 20:00:05,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213391721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:05,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:05,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:00:05,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53354319] [2024-06-03 20:00:05,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:05,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:00:05,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:05,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:00:05,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:00:05,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:00:05,768 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) [2024-06-03 20:00:05,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:05,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:00:05,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:06,188 INFO L124 PetriNetUnfolderBase]: 1380/2108 cut-off events. [2024-06-03 20:00:06,188 INFO L125 PetriNetUnfolderBase]: For 1134/1142 co-relation queries the response was YES. [2024-06-03 20:00:06,190 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. [2024-06-03 20:00:06,198 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2024-06-03 20:00:06,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 306 flow [2024-06-03 20:00:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:00:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:00:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-03 20:00:06,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-03 20:00:06,203 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 104 transitions. [2024-06-03 20:00:06,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 306 flow [2024-06-03 20:00:06,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 292 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 20:00:06,206 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 157 flow [2024-06-03 20:00:06,206 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} [2024-06-03 20:00:06,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-03 20:00:06,207 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 157 flow [2024-06-03 20:00:06,207 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) [2024-06-03 20:00:06,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:06,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:06,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:00:06,208 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)] === [2024-06-03 20:00:06,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:06,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1529658022, now seen corresponding path program 1 times [2024-06-03 20:00:06,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:06,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271761643] [2024-06-03 20:00:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:06,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:06,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:06,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271761643] [2024-06-03 20:00:06,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271761643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:06,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:06,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:00:06,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287513159] [2024-06-03 20:00:06,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:06,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:00:06,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:06,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:00:06,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:00:06,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:00:06,955 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) [2024-06-03 20:00:06,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:06,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:00:06,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:07,230 INFO L124 PetriNetUnfolderBase]: 1126/1735 cut-off events. [2024-06-03 20:00:07,231 INFO L125 PetriNetUnfolderBase]: For 1662/1662 co-relation queries the response was YES. [2024-06-03 20:00:07,233 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. [2024-06-03 20:00:07,239 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-03 20:00:07,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 295 flow [2024-06-03 20:00:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:00:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:00:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-03 20:00:07,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:00:07,241 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 157 flow. Second operand 5 states and 90 transitions. [2024-06-03 20:00:07,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 295 flow [2024-06-03 20:00:07,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 272 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 20:00:07,245 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 178 flow [2024-06-03 20:00:07,245 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} [2024-06-03 20:00:07,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-03 20:00:07,247 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 178 flow [2024-06-03 20:00:07,247 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) [2024-06-03 20:00:07,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:07,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:07,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:00:07,247 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)] === [2024-06-03 20:00:07,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:07,248 INFO L85 PathProgramCache]: Analyzing trace with hash 182802704, now seen corresponding path program 1 times [2024-06-03 20:00:07,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:07,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820893908] [2024-06-03 20:00:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:07,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:08,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:08,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820893908] [2024-06-03 20:00:08,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820893908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:08,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:08,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:00:08,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203666871] [2024-06-03 20:00:08,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:08,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:00:08,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:08,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:00:08,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:00:08,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:00:08,364 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) [2024-06-03 20:00:08,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:08,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:00:08,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:08,659 INFO L124 PetriNetUnfolderBase]: 1116/1717 cut-off events. [2024-06-03 20:00:08,659 INFO L125 PetriNetUnfolderBase]: For 2620/2620 co-relation queries the response was YES. [2024-06-03 20:00:08,662 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. [2024-06-03 20:00:08,668 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 45 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2024-06-03 20:00:08,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 348 flow [2024-06-03 20:00:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:00:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:00:08,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-03 20:00:08,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-03 20:00:08,670 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 178 flow. Second operand 6 states and 107 transitions. [2024-06-03 20:00:08,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 348 flow [2024-06-03 20:00:08,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 328 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 20:00:08,675 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 212 flow [2024-06-03 20:00:08,676 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} [2024-06-03 20:00:08,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-03 20:00:08,678 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 212 flow [2024-06-03 20:00:08,678 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) [2024-06-03 20:00:08,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:08,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:08,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:00:08,682 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)] === [2024-06-03 20:00:08,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:08,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1461393469, now seen corresponding path program 1 times [2024-06-03 20:00:08,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:08,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622885523] [2024-06-03 20:00:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:08,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:09,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:09,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622885523] [2024-06-03 20:00:09,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622885523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:09,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:09,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:00:09,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011048035] [2024-06-03 20:00:09,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:09,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:00:09,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:09,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:00:09,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:00:09,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:09,439 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) [2024-06-03 20:00:09,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:09,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:09,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:09,854 INFO L124 PetriNetUnfolderBase]: 1372/2099 cut-off events. [2024-06-03 20:00:09,854 INFO L125 PetriNetUnfolderBase]: For 4211/4223 co-relation queries the response was YES. [2024-06-03 20:00:09,872 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. [2024-06-03 20:00:09,880 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2024-06-03 20:00:09,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 426 flow [2024-06-03 20:00:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:00:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:00:09,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-03 20:00:09,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-03 20:00:09,893 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 212 flow. Second operand 6 states and 107 transitions. [2024-06-03 20:00:09,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 426 flow [2024-06-03 20:00:09,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 71 transitions, 396 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 20:00:09,897 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 260 flow [2024-06-03 20:00:09,897 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} [2024-06-03 20:00:09,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-03 20:00:09,898 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 260 flow [2024-06-03 20:00:09,898 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) [2024-06-03 20:00:09,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:09,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:09,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:00:09,898 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)] === [2024-06-03 20:00:09,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:09,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1453229929, now seen corresponding path program 2 times [2024-06-03 20:00:09,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:09,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774601768] [2024-06-03 20:00:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:09,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:10,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:10,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774601768] [2024-06-03 20:00:10,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774601768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:10,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:10,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:00:10,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399352384] [2024-06-03 20:00:10,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:10,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:00:10,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:10,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:00:10,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:00:10,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:10,738 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) [2024-06-03 20:00:10,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:10,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:10,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:11,048 INFO L124 PetriNetUnfolderBase]: 1378/2114 cut-off events. [2024-06-03 20:00:11,048 INFO L125 PetriNetUnfolderBase]: For 5943/5953 co-relation queries the response was YES. [2024-06-03 20:00:11,052 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. [2024-06-03 20:00:11,059 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2024-06-03 20:00:11,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 78 transitions, 538 flow [2024-06-03 20:00:11,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:00:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:00:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-03 20:00:11,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-03 20:00:11,061 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 260 flow. Second operand 6 states and 110 transitions. [2024-06-03 20:00:11,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 78 transitions, 538 flow [2024-06-03 20:00:11,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 512 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-03 20:00:11,065 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 342 flow [2024-06-03 20:00:11,065 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} [2024-06-03 20:00:11,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-03 20:00:11,066 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 342 flow [2024-06-03 20:00:11,066 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) [2024-06-03 20:00:11,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:11,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:11,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:00:11,066 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)] === [2024-06-03 20:00:11,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:11,067 INFO L85 PathProgramCache]: Analyzing trace with hash 253339214, now seen corresponding path program 1 times [2024-06-03 20:00:11,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:11,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083892524] [2024-06-03 20:00:11,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:11,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:11,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:11,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083892524] [2024-06-03 20:00:11,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083892524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:11,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:11,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:00:11,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367129915] [2024-06-03 20:00:11,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:11,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:00:11,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:11,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:00:11,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:00:11,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:11,707 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) [2024-06-03 20:00:11,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:11,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:11,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:12,115 INFO L124 PetriNetUnfolderBase]: 1613/2418 cut-off events. [2024-06-03 20:00:12,115 INFO L125 PetriNetUnfolderBase]: For 8648/8648 co-relation queries the response was YES. [2024-06-03 20:00:12,118 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. [2024-06-03 20:00:12,126 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 61 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-06-03 20:00:12,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 532 flow [2024-06-03 20:00:12,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:00:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:00:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-06-03 20:00:12,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853658536585366 [2024-06-03 20:00:12,128 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 342 flow. Second operand 5 states and 79 transitions. [2024-06-03 20:00:12,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 532 flow [2024-06-03 20:00:12,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 500 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-03 20:00:12,133 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 376 flow [2024-06-03 20:00:12,134 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} [2024-06-03 20:00:12,134 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-03 20:00:12,134 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 376 flow [2024-06-03 20:00:12,135 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) [2024-06-03 20:00:12,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:12,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:12,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:00:12,135 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)] === [2024-06-03 20:00:12,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:12,135 INFO L85 PathProgramCache]: Analyzing trace with hash -457820444, now seen corresponding path program 1 times [2024-06-03 20:00:12,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:12,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636588906] [2024-06-03 20:00:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:12,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:13,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:13,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636588906] [2024-06-03 20:00:13,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636588906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:13,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:13,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:00:13,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250706058] [2024-06-03 20:00:13,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:13,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:00:13,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:13,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:00:13,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:00:13,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:13,202 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) [2024-06-03 20:00:13,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:13,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:13,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:13,595 INFO L124 PetriNetUnfolderBase]: 1367/2094 cut-off events. [2024-06-03 20:00:13,596 INFO L125 PetriNetUnfolderBase]: For 8407/8417 co-relation queries the response was YES. [2024-06-03 20:00:13,599 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. [2024-06-03 20:00:13,606 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 60 selfloop transitions, 18 changer transitions 0/82 dead transitions. [2024-06-03 20:00:13,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 582 flow [2024-06-03 20:00:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:00:13,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:00:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-03 20:00:13,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-03 20:00:13,608 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 376 flow. Second operand 6 states and 107 transitions. [2024-06-03 20:00:13,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 582 flow [2024-06-03 20:00:13,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 564 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-03 20:00:13,614 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 406 flow [2024-06-03 20:00:13,614 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} [2024-06-03 20:00:13,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-03 20:00:13,615 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 406 flow [2024-06-03 20:00:13,615 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) [2024-06-03 20:00:13,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:13,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:13,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:00:13,616 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)] === [2024-06-03 20:00:13,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:13,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1941443425, now seen corresponding path program 1 times [2024-06-03 20:00:13,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:13,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020176669] [2024-06-03 20:00:13,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:13,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:14,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:14,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020176669] [2024-06-03 20:00:14,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020176669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:14,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:14,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:00:14,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585944811] [2024-06-03 20:00:14,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:14,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:00:14,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:14,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:00:14,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:00:14,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:14,615 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) [2024-06-03 20:00:14,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:14,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:14,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:15,040 INFO L124 PetriNetUnfolderBase]: 1389/2130 cut-off events. [2024-06-03 20:00:15,040 INFO L125 PetriNetUnfolderBase]: For 10290/10304 co-relation queries the response was YES. [2024-06-03 20:00:15,045 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. [2024-06-03 20:00:15,051 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 67 selfloop transitions, 19 changer transitions 0/90 dead transitions. [2024-06-03 20:00:15,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 668 flow [2024-06-03 20:00:15,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:00:15,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:00:15,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:00:15,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:00:15,052 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 406 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:00:15,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 668 flow [2024-06-03 20:00:15,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 90 transitions, 623 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:00:15,059 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 439 flow [2024-06-03 20:00:15,059 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} [2024-06-03 20:00:15,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-03 20:00:15,060 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 439 flow [2024-06-03 20:00:15,060 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) [2024-06-03 20:00:15,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:15,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:15,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:00:15,060 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)] === [2024-06-03 20:00:15,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:15,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1945168075, now seen corresponding path program 2 times [2024-06-03 20:00:15,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:15,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276290112] [2024-06-03 20:00:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:15,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:15,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:15,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276290112] [2024-06-03 20:00:15,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276290112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:15,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:15,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:00:15,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766659325] [2024-06-03 20:00:15,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:15,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:00:15,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:15,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:00:15,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:00:16,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:16,084 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) [2024-06-03 20:00:16,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:16,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:16,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:16,528 INFO L124 PetriNetUnfolderBase]: 1465/2244 cut-off events. [2024-06-03 20:00:16,528 INFO L125 PetriNetUnfolderBase]: For 13129/13139 co-relation queries the response was YES. [2024-06-03 20:00:16,533 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. [2024-06-03 20:00:16,565 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 75 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-06-03 20:00:16,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 807 flow [2024-06-03 20:00:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:00:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:00:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 20:00:16,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:00:16,568 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 439 flow. Second operand 7 states and 126 transitions. [2024-06-03 20:00:16,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 807 flow [2024-06-03 20:00:16,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 99 transitions, 753 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:00:16,577 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 510 flow [2024-06-03 20:00:16,577 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} [2024-06-03 20:00:16,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-03 20:00:16,578 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 510 flow [2024-06-03 20:00:16,578 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) [2024-06-03 20:00:16,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:16,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:16,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:00:16,578 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)] === [2024-06-03 20:00:16,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:16,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1945162495, now seen corresponding path program 3 times [2024-06-03 20:00:16,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:16,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343008821] [2024-06-03 20:00:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:16,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:17,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:17,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343008821] [2024-06-03 20:00:17,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343008821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:17,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:17,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:00:17,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70395062] [2024-06-03 20:00:17,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:17,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:00:17,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:17,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:00:17,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:00:17,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:17,785 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) [2024-06-03 20:00:17,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:17,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:17,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:18,170 INFO L124 PetriNetUnfolderBase]: 1471/2260 cut-off events. [2024-06-03 20:00:18,171 INFO L125 PetriNetUnfolderBase]: For 15989/15999 co-relation queries the response was YES. [2024-06-03 20:00:18,175 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. [2024-06-03 20:00:18,183 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 69 selfloop transitions, 26 changer transitions 0/99 dead transitions. [2024-06-03 20:00:18,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 802 flow [2024-06-03 20:00:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:00:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:00:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:00:18,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-03 20:00:18,185 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 510 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:00:18,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 802 flow [2024-06-03 20:00:18,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 757 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 20:00:18,200 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 569 flow [2024-06-03 20:00:18,201 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} [2024-06-03 20:00:18,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-03 20:00:18,202 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 569 flow [2024-06-03 20:00:18,202 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) [2024-06-03 20:00:18,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:18,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:18,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:00:18,203 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)] === [2024-06-03 20:00:18,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:18,203 INFO L85 PathProgramCache]: Analyzing trace with hash -142441614, now seen corresponding path program 1 times [2024-06-03 20:00:18,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:18,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092397889] [2024-06-03 20:00:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:18,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:19,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:19,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092397889] [2024-06-03 20:00:19,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092397889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:19,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:19,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:00:19,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158339220] [2024-06-03 20:00:19,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:19,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:00:19,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:19,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:00:19,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:00:19,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:19,704 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) [2024-06-03 20:00:19,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:19,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:19,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:20,206 INFO L124 PetriNetUnfolderBase]: 1636/2494 cut-off events. [2024-06-03 20:00:20,207 INFO L125 PetriNetUnfolderBase]: For 21176/21176 co-relation queries the response was YES. [2024-06-03 20:00:20,213 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. [2024-06-03 20:00:20,225 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 84 selfloop transitions, 23 changer transitions 0/113 dead transitions. [2024-06-03 20:00:20,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 113 transitions, 929 flow [2024-06-03 20:00:20,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:00:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:00:20,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-03 20:00:20,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-03 20:00:20,227 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 569 flow. Second operand 10 states and 155 transitions. [2024-06-03 20:00:20,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 113 transitions, 929 flow [2024-06-03 20:00:20,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 113 transitions, 849 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:00:20,243 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 641 flow [2024-06-03 20:00:20,243 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} [2024-06-03 20:00:20,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-03 20:00:20,244 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 641 flow [2024-06-03 20:00:20,244 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) [2024-06-03 20:00:20,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:20,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:20,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:00:20,244 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)] === [2024-06-03 20:00:20,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:20,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1307591742, now seen corresponding path program 1 times [2024-06-03 20:00:20,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:20,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474144561] [2024-06-03 20:00:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:20,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:21,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:21,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474144561] [2024-06-03 20:00:21,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474144561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:21,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:21,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:00:21,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703222913] [2024-06-03 20:00:21,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:21,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:00:21,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:21,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:00:21,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:00:21,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:21,275 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) [2024-06-03 20:00:21,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:21,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:21,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:21,790 INFO L124 PetriNetUnfolderBase]: 1640/2506 cut-off events. [2024-06-03 20:00:21,790 INFO L125 PetriNetUnfolderBase]: For 23367/23371 co-relation queries the response was YES. [2024-06-03 20:00:21,796 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. [2024-06-03 20:00:21,804 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 89 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2024-06-03 20:00:21,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 111 transitions, 945 flow [2024-06-03 20:00:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:00:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:00:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 20:00:21,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-03 20:00:21,805 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 641 flow. Second operand 7 states and 121 transitions. [2024-06-03 20:00:21,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 111 transitions, 945 flow [2024-06-03 20:00:21,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 876 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:00:21,819 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 649 flow [2024-06-03 20:00:21,819 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} [2024-06-03 20:00:21,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-03 20:00:21,821 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 649 flow [2024-06-03 20:00:21,821 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) [2024-06-03 20:00:21,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:21,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:21,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:00:21,822 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)] === [2024-06-03 20:00:21,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:21,822 INFO L85 PathProgramCache]: Analyzing trace with hash 52403424, now seen corresponding path program 1 times [2024-06-03 20:00:21,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:21,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237523077] [2024-06-03 20:00:21,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:21,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:22,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:22,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237523077] [2024-06-03 20:00:22,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237523077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:22,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:22,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:00:22,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34109889] [2024-06-03 20:00:22,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:22,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:00:22,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:00:22,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:00:23,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:23,094 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) [2024-06-03 20:00:23,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:23,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:23,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:23,557 INFO L124 PetriNetUnfolderBase]: 1635/2504 cut-off events. [2024-06-03 20:00:23,557 INFO L125 PetriNetUnfolderBase]: For 25727/25731 co-relation queries the response was YES. [2024-06-03 20:00:23,562 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. [2024-06-03 20:00:23,569 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 84 selfloop transitions, 25 changer transitions 0/114 dead transitions. [2024-06-03 20:00:23,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 981 flow [2024-06-03 20:00:23,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:00:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:00:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:00:23,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:00:23,571 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 649 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:00:23,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 981 flow [2024-06-03 20:00:23,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 114 transitions, 922 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 20:00:23,584 INFO L231 Difference]: Finished difference. Result has 88 places, 91 transitions, 708 flow [2024-06-03 20:00:23,584 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} [2024-06-03 20:00:23,585 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-03 20:00:23,585 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 708 flow [2024-06-03 20:00:23,585 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) [2024-06-03 20:00:23,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:23,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:23,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:00:23,585 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)] === [2024-06-03 20:00:23,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:23,586 INFO L85 PathProgramCache]: Analyzing trace with hash -694156812, now seen corresponding path program 2 times [2024-06-03 20:00:23,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:23,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848184136] [2024-06-03 20:00:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:23,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:24,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:24,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848184136] [2024-06-03 20:00:24,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848184136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:24,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:24,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:00:24,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626725907] [2024-06-03 20:00:24,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:24,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:00:24,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:24,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:00:24,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:00:24,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:24,752 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) [2024-06-03 20:00:24,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:24,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:24,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:25,243 INFO L124 PetriNetUnfolderBase]: 1652/2531 cut-off events. [2024-06-03 20:00:25,243 INFO L125 PetriNetUnfolderBase]: For 30463/30467 co-relation queries the response was YES. [2024-06-03 20:00:25,249 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. [2024-06-03 20:00:25,257 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 90 selfloop transitions, 21 changer transitions 0/116 dead transitions. [2024-06-03 20:00:25,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 116 transitions, 1030 flow [2024-06-03 20:00:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:00:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:00:25,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 20:00:25,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-03 20:00:25,259 INFO L175 Difference]: Start difference. First operand has 88 places, 91 transitions, 708 flow. Second operand 7 states and 122 transitions. [2024-06-03 20:00:25,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 116 transitions, 1030 flow [2024-06-03 20:00:25,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 116 transitions, 950 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 20:00:25,276 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 720 flow [2024-06-03 20:00:25,276 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} [2024-06-03 20:00:25,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-03 20:00:25,277 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 720 flow [2024-06-03 20:00:25,277 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) [2024-06-03 20:00:25,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:25,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:25,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:00:25,278 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)] === [2024-06-03 20:00:25,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:25,278 INFO L85 PathProgramCache]: Analyzing trace with hash -689572842, now seen corresponding path program 3 times [2024-06-03 20:00:25,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:25,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141494958] [2024-06-03 20:00:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:25,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:26,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:26,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141494958] [2024-06-03 20:00:26,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141494958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:26,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:26,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:00:26,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478996287] [2024-06-03 20:00:26,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:26,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:00:26,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:26,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:00:26,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:00:26,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:26,323 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) [2024-06-03 20:00:26,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:26,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:26,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:26,787 INFO L124 PetriNetUnfolderBase]: 1644/2521 cut-off events. [2024-06-03 20:00:26,787 INFO L125 PetriNetUnfolderBase]: For 33832/33836 co-relation queries the response was YES. [2024-06-03 20:00:26,792 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. [2024-06-03 20:00:26,798 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 88 selfloop transitions, 25 changer transitions 0/118 dead transitions. [2024-06-03 20:00:26,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 118 transitions, 1052 flow [2024-06-03 20:00:26,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:00:26,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:00:26,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:00:26,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:00:26,821 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 720 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:00:26,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 118 transitions, 1052 flow [2024-06-03 20:00:26,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 118 transitions, 980 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 20:00:26,836 INFO L231 Difference]: Finished difference. Result has 92 places, 95 transitions, 751 flow [2024-06-03 20:00:26,836 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} [2024-06-03 20:00:26,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-03 20:00:26,836 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 95 transitions, 751 flow [2024-06-03 20:00:26,836 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) [2024-06-03 20:00:26,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:26,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:26,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:00:26,837 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)] === [2024-06-03 20:00:26,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:26,837 INFO L85 PathProgramCache]: Analyzing trace with hash -15812017, now seen corresponding path program 1 times [2024-06-03 20:00:26,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:26,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184354383] [2024-06-03 20:00:26,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:26,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:27,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:27,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184354383] [2024-06-03 20:00:27,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184354383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:27,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:27,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:00:27,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341476691] [2024-06-03 20:00:27,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:27,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:00:27,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:27,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:00:27,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:00:27,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:27,475 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) [2024-06-03 20:00:27,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:27,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:27,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:28,001 INFO L124 PetriNetUnfolderBase]: 1772/2655 cut-off events. [2024-06-03 20:00:28,001 INFO L125 PetriNetUnfolderBase]: For 37942/37946 co-relation queries the response was YES. [2024-06-03 20:00:28,007 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. [2024-06-03 20:00:28,014 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 89 selfloop transitions, 14 changer transitions 0/106 dead transitions. [2024-06-03 20:00:28,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 106 transitions, 1001 flow [2024-06-03 20:00:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:00:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:00:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-03 20:00:28,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-03 20:00:28,015 INFO L175 Difference]: Start difference. First operand has 92 places, 95 transitions, 751 flow. Second operand 5 states and 81 transitions. [2024-06-03 20:00:28,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 106 transitions, 1001 flow [2024-06-03 20:00:28,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 106 transitions, 916 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 20:00:28,033 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 734 flow [2024-06-03 20:00:28,033 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} [2024-06-03 20:00:28,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-03 20:00:28,033 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 734 flow [2024-06-03 20:00:28,033 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) [2024-06-03 20:00:28,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:28,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:28,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:00:28,034 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)] === [2024-06-03 20:00:28,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1354133587, now seen corresponding path program 2 times [2024-06-03 20:00:28,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:28,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211226378] [2024-06-03 20:00:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:28,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:28,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:28,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211226378] [2024-06-03 20:00:28,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211226378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:28,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:28,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:00:28,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557030487] [2024-06-03 20:00:28,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:28,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:00:28,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:28,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:00:28,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:00:28,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:28,636 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) [2024-06-03 20:00:28,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:28,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:28,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:29,191 INFO L124 PetriNetUnfolderBase]: 1766/2647 cut-off events. [2024-06-03 20:00:29,191 INFO L125 PetriNetUnfolderBase]: For 39764/39768 co-relation queries the response was YES. [2024-06-03 20:00:29,199 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. [2024-06-03 20:00:29,208 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 91 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2024-06-03 20:00:29,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 111 transitions, 1004 flow [2024-06-03 20:00:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:00:29,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:00:29,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-03 20:00:29,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-03 20:00:29,210 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 734 flow. Second operand 6 states and 93 transitions. [2024-06-03 20:00:29,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 111 transitions, 1004 flow [2024-06-03 20:00:29,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 111 transitions, 960 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 20:00:29,231 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 766 flow [2024-06-03 20:00:29,232 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} [2024-06-03 20:00:29,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-03 20:00:29,232 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 766 flow [2024-06-03 20:00:29,232 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) [2024-06-03 20:00:29,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:29,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:29,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:00:29,233 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)] === [2024-06-03 20:00:29,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:29,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1770827481, now seen corresponding path program 1 times [2024-06-03 20:00:29,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:29,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882504552] [2024-06-03 20:00:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:29,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:29,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:29,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882504552] [2024-06-03 20:00:29,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882504552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:29,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:29,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:00:29,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559512824] [2024-06-03 20:00:29,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:29,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:00:29,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:29,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:00:29,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:00:29,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:29,952 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) [2024-06-03 20:00:29,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:29,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:29,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:30,341 INFO L124 PetriNetUnfolderBase]: 1784/2670 cut-off events. [2024-06-03 20:00:30,342 INFO L125 PetriNetUnfolderBase]: For 39473/39473 co-relation queries the response was YES. [2024-06-03 20:00:30,348 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. [2024-06-03 20:00:30,354 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 109 selfloop transitions, 15 changer transitions 0/127 dead transitions. [2024-06-03 20:00:30,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 127 transitions, 1173 flow [2024-06-03 20:00:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:00:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:00:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-03 20:00:30,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-03 20:00:30,356 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 766 flow. Second operand 6 states and 97 transitions. [2024-06-03 20:00:30,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 127 transitions, 1173 flow [2024-06-03 20:00:30,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 127 transitions, 1120 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:00:30,373 INFO L231 Difference]: Finished difference. Result has 99 places, 112 transitions, 862 flow [2024-06-03 20:00:30,374 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} [2024-06-03 20:00:30,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-03 20:00:30,374 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 112 transitions, 862 flow [2024-06-03 20:00:30,374 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) [2024-06-03 20:00:30,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:30,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:30,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:00:30,374 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)] === [2024-06-03 20:00:30,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:30,375 INFO L85 PathProgramCache]: Analyzing trace with hash -380855665, now seen corresponding path program 2 times [2024-06-03 20:00:30,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:30,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96743713] [2024-06-03 20:00:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:30,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:31,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:31,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96743713] [2024-06-03 20:00:31,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96743713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:31,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:31,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:00:31,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305806615] [2024-06-03 20:00:31,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:31,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:00:31,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:31,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:00:31,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:00:31,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:31,062 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) [2024-06-03 20:00:31,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:31,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:31,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:31,456 INFO L124 PetriNetUnfolderBase]: 1778/2662 cut-off events. [2024-06-03 20:00:31,456 INFO L125 PetriNetUnfolderBase]: For 42884/42884 co-relation queries the response was YES. [2024-06-03 20:00:31,463 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. [2024-06-03 20:00:31,470 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 109 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2024-06-03 20:00:31,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 123 transitions, 1138 flow [2024-06-03 20:00:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:00:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:00:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-03 20:00:31,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 20:00:31,472 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 862 flow. Second operand 6 states and 90 transitions. [2024-06-03 20:00:31,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 123 transitions, 1138 flow [2024-06-03 20:00:31,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 123 transitions, 1102 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-03 20:00:31,498 INFO L231 Difference]: Finished difference. Result has 104 places, 113 transitions, 863 flow [2024-06-03 20:00:31,498 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} [2024-06-03 20:00:31,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-03 20:00:31,499 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 113 transitions, 863 flow [2024-06-03 20:00:31,499 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) [2024-06-03 20:00:31,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:31,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:31,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:00:31,500 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)] === [2024-06-03 20:00:31,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:31,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1354118707, now seen corresponding path program 1 times [2024-06-03 20:00:31,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:31,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708343267] [2024-06-03 20:00:31,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:31,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:32,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:32,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708343267] [2024-06-03 20:00:32,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708343267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:32,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:32,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:00:32,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590230027] [2024-06-03 20:00:32,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:32,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:00:32,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:32,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:00:32,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:00:32,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:32,286 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) [2024-06-03 20:00:32,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:32,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:32,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:32,744 INFO L124 PetriNetUnfolderBase]: 1773/2655 cut-off events. [2024-06-03 20:00:32,745 INFO L125 PetriNetUnfolderBase]: For 45729/45729 co-relation queries the response was YES. [2024-06-03 20:00:32,752 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. [2024-06-03 20:00:32,758 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 110 selfloop transitions, 12 changer transitions 0/125 dead transitions. [2024-06-03 20:00:32,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 125 transitions, 1152 flow [2024-06-03 20:00:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:00:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:00:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-03 20:00:32,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 20:00:32,760 INFO L175 Difference]: Start difference. First operand has 104 places, 113 transitions, 863 flow. Second operand 6 states and 90 transitions. [2024-06-03 20:00:32,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 125 transitions, 1152 flow [2024-06-03 20:00:32,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 125 transitions, 1128 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 20:00:32,783 INFO L231 Difference]: Finished difference. Result has 106 places, 115 transitions, 890 flow [2024-06-03 20:00:32,784 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} [2024-06-03 20:00:32,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-03 20:00:32,784 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 115 transitions, 890 flow [2024-06-03 20:00:32,784 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) [2024-06-03 20:00:32,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:32,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:32,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:00:32,785 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)] === [2024-06-03 20:00:32,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:32,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1880637630, now seen corresponding path program 1 times [2024-06-03 20:00:32,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:32,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895025730] [2024-06-03 20:00:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:32,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:34,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:34,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895025730] [2024-06-03 20:00:34,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895025730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:34,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:34,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:00:34,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000157607] [2024-06-03 20:00:34,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:34,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:00:34,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:34,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:00:34,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:00:34,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:34,161 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) [2024-06-03 20:00:34,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:34,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:34,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:34,701 INFO L124 PetriNetUnfolderBase]: 1697/2596 cut-off events. [2024-06-03 20:00:34,701 INFO L125 PetriNetUnfolderBase]: For 51080/51084 co-relation queries the response was YES. [2024-06-03 20:00:34,709 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. [2024-06-03 20:00:34,717 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 19 changer transitions 0/145 dead transitions. [2024-06-03 20:00:34,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 145 transitions, 1286 flow [2024-06-03 20:00:34,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:00:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:00:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 20:00:34,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:00:34,718 INFO L175 Difference]: Start difference. First operand has 106 places, 115 transitions, 890 flow. Second operand 8 states and 136 transitions. [2024-06-03 20:00:34,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 145 transitions, 1286 flow [2024-06-03 20:00:34,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 145 transitions, 1251 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 20:00:34,748 INFO L231 Difference]: Finished difference. Result has 110 places, 117 transitions, 948 flow [2024-06-03 20:00:34,748 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} [2024-06-03 20:00:34,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-03 20:00:34,749 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 117 transitions, 948 flow [2024-06-03 20:00:34,749 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) [2024-06-03 20:00:34,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:34,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:34,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:00:34,749 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)] === [2024-06-03 20:00:34,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:34,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1707623618, now seen corresponding path program 2 times [2024-06-03 20:00:34,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:34,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129890070] [2024-06-03 20:00:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:34,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:35,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:35,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129890070] [2024-06-03 20:00:35,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129890070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:35,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:35,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:00:35,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598464613] [2024-06-03 20:00:35,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:35,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:00:35,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:35,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:00:35,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:00:36,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:36,016 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) [2024-06-03 20:00:36,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:36,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:36,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:36,499 INFO L124 PetriNetUnfolderBase]: 1689/2599 cut-off events. [2024-06-03 20:00:36,499 INFO L125 PetriNetUnfolderBase]: For 54259/54263 co-relation queries the response was YES. [2024-06-03 20:00:36,507 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. [2024-06-03 20:00:36,515 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 115 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-03 20:00:36,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 147 transitions, 1356 flow [2024-06-03 20:00:36,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:00:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:00:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:00:36,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-03 20:00:36,516 INFO L175 Difference]: Start difference. First operand has 110 places, 117 transitions, 948 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:00:36,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 147 transitions, 1356 flow [2024-06-03 20:00:36,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 147 transitions, 1281 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 20:00:36,571 INFO L231 Difference]: Finished difference. Result has 112 places, 119 transitions, 987 flow [2024-06-03 20:00:36,571 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} [2024-06-03 20:00:36,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-03 20:00:36,572 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 119 transitions, 987 flow [2024-06-03 20:00:36,572 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) [2024-06-03 20:00:36,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:36,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:36,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:00:36,573 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)] === [2024-06-03 20:00:36,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:36,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1624503008, now seen corresponding path program 3 times [2024-06-03 20:00:36,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:36,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145691954] [2024-06-03 20:00:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:36,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:37,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:37,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145691954] [2024-06-03 20:00:37,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145691954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:37,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:37,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:00:37,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103717313] [2024-06-03 20:00:37,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:37,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:00:37,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:37,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:00:37,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:00:37,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:37,866 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) [2024-06-03 20:00:37,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:37,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:37,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:38,433 INFO L124 PetriNetUnfolderBase]: 1717/2651 cut-off events. [2024-06-03 20:00:38,433 INFO L125 PetriNetUnfolderBase]: For 62055/62059 co-relation queries the response was YES. [2024-06-03 20:00:38,442 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. [2024-06-03 20:00:38,449 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 23 changer transitions 0/149 dead transitions. [2024-06-03 20:00:38,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 149 transitions, 1401 flow [2024-06-03 20:00:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:00:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:00:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 20:00:38,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-03 20:00:38,451 INFO L175 Difference]: Start difference. First operand has 112 places, 119 transitions, 987 flow. Second operand 8 states and 137 transitions. [2024-06-03 20:00:38,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 149 transitions, 1401 flow [2024-06-03 20:00:38,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 149 transitions, 1307 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 20:00:38,484 INFO L231 Difference]: Finished difference. Result has 114 places, 121 transitions, 1002 flow [2024-06-03 20:00:38,484 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} [2024-06-03 20:00:38,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-03 20:00:38,485 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 121 transitions, 1002 flow [2024-06-03 20:00:38,485 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) [2024-06-03 20:00:38,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:38,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:38,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:00:38,486 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)] === [2024-06-03 20:00:38,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:38,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1711348640, now seen corresponding path program 1 times [2024-06-03 20:00:38,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:38,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653492508] [2024-06-03 20:00:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:38,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:40,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:40,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653492508] [2024-06-03 20:00:40,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653492508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:40,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:40,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:00:40,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090049663] [2024-06-03 20:00:40,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:40,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:00:40,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:00:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:00:40,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:40,261 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) [2024-06-03 20:00:40,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:40,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:40,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:40,853 INFO L124 PetriNetUnfolderBase]: 1897/2852 cut-off events. [2024-06-03 20:00:40,853 INFO L125 PetriNetUnfolderBase]: For 67672/67680 co-relation queries the response was YES. [2024-06-03 20:00:40,863 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. [2024-06-03 20:00:40,871 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 132 selfloop transitions, 26 changer transitions 0/161 dead transitions. [2024-06-03 20:00:40,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 161 transitions, 1492 flow [2024-06-03 20:00:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:00:40,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:00:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:00:40,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:00:40,873 INFO L175 Difference]: Start difference. First operand has 114 places, 121 transitions, 1002 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:00:40,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 161 transitions, 1492 flow [2024-06-03 20:00:40,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 161 transitions, 1401 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:00:40,918 INFO L231 Difference]: Finished difference. Result has 118 places, 127 transitions, 1061 flow [2024-06-03 20:00:40,918 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} [2024-06-03 20:00:40,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-03 20:00:40,919 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 127 transitions, 1061 flow [2024-06-03 20:00:40,919 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) [2024-06-03 20:00:40,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:40,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:40,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:00:40,919 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)] === [2024-06-03 20:00:40,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:40,920 INFO L85 PathProgramCache]: Analyzing trace with hash 995971804, now seen corresponding path program 2 times [2024-06-03 20:00:40,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:40,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244142786] [2024-06-03 20:00:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:40,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:42,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:42,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244142786] [2024-06-03 20:00:42,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244142786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:42,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:42,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:00:42,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864609270] [2024-06-03 20:00:42,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:42,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:00:42,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:42,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:00:42,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:00:42,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:42,322 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) [2024-06-03 20:00:42,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:42,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:42,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:42,902 INFO L124 PetriNetUnfolderBase]: 1941/2915 cut-off events. [2024-06-03 20:00:42,902 INFO L125 PetriNetUnfolderBase]: For 71945/71949 co-relation queries the response was YES. [2024-06-03 20:00:42,911 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. [2024-06-03 20:00:42,918 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 132 selfloop transitions, 35 changer transitions 0/170 dead transitions. [2024-06-03 20:00:42,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 170 transitions, 1652 flow [2024-06-03 20:00:42,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:00:42,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:00:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 20:00:42,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-03 20:00:42,923 INFO L175 Difference]: Start difference. First operand has 118 places, 127 transitions, 1061 flow. Second operand 9 states and 152 transitions. [2024-06-03 20:00:42,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 170 transitions, 1652 flow [2024-06-03 20:00:42,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 170 transitions, 1550 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 20:00:42,963 INFO L231 Difference]: Finished difference. Result has 123 places, 136 transitions, 1119 flow [2024-06-03 20:00:42,963 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} [2024-06-03 20:00:42,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-03 20:00:42,964 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 136 transitions, 1119 flow [2024-06-03 20:00:42,964 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) [2024-06-03 20:00:42,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:42,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:42,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:00:42,964 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)] === [2024-06-03 20:00:42,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:42,965 INFO L85 PathProgramCache]: Analyzing trace with hash 103595288, now seen corresponding path program 3 times [2024-06-03 20:00:42,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:42,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336029332] [2024-06-03 20:00:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:42,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:44,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:44,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336029332] [2024-06-03 20:00:44,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336029332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:44,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:44,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:00:44,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452155457] [2024-06-03 20:00:44,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:44,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:00:44,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:44,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:00:44,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:00:44,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:44,314 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) [2024-06-03 20:00:44,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:44,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:44,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:44,827 INFO L124 PetriNetUnfolderBase]: 1931/2901 cut-off events. [2024-06-03 20:00:44,828 INFO L125 PetriNetUnfolderBase]: For 75923/75927 co-relation queries the response was YES. [2024-06-03 20:00:44,838 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. [2024-06-03 20:00:44,847 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 128 selfloop transitions, 36 changer transitions 0/167 dead transitions. [2024-06-03 20:00:44,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 167 transitions, 1537 flow [2024-06-03 20:00:44,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:00:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:00:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:00:44,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-03 20:00:44,854 INFO L175 Difference]: Start difference. First operand has 123 places, 136 transitions, 1119 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:00:44,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 167 transitions, 1537 flow [2024-06-03 20:00:44,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 167 transitions, 1452 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 20:00:44,903 INFO L231 Difference]: Finished difference. Result has 128 places, 136 transitions, 1114 flow [2024-06-03 20:00:44,904 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} [2024-06-03 20:00:44,904 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-03 20:00:44,904 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 136 transitions, 1114 flow [2024-06-03 20:00:44,904 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) [2024-06-03 20:00:44,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:44,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:44,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:00:44,905 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)] === [2024-06-03 20:00:44,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:44,905 INFO L85 PathProgramCache]: Analyzing trace with hash 98082806, now seen corresponding path program 4 times [2024-06-03 20:00:44,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:44,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701358937] [2024-06-03 20:00:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:44,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:46,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:46,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701358937] [2024-06-03 20:00:46,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701358937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:46,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:46,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:00:46,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081424972] [2024-06-03 20:00:46,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:46,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:00:46,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:46,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:00:46,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:00:46,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:46,309 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) [2024-06-03 20:00:46,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:46,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:46,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:46,820 INFO L124 PetriNetUnfolderBase]: 1803/2780 cut-off events. [2024-06-03 20:00:46,821 INFO L125 PetriNetUnfolderBase]: For 82287/82296 co-relation queries the response was YES. [2024-06-03 20:00:46,831 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. [2024-06-03 20:00:46,840 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 128 selfloop transitions, 30 changer transitions 0/165 dead transitions. [2024-06-03 20:00:46,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 165 transitions, 1562 flow [2024-06-03 20:00:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:00:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:00:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:00:46,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-03 20:00:46,841 INFO L175 Difference]: Start difference. First operand has 128 places, 136 transitions, 1114 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:00:46,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 165 transitions, 1562 flow [2024-06-03 20:00:46,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 165 transitions, 1434 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-03 20:00:46,887 INFO L231 Difference]: Finished difference. Result has 126 places, 138 transitions, 1115 flow [2024-06-03 20:00:46,887 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} [2024-06-03 20:00:46,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-03 20:00:46,888 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 138 transitions, 1115 flow [2024-06-03 20:00:46,888 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) [2024-06-03 20:00:46,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:46,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:46,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:00:46,888 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)] === [2024-06-03 20:00:46,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:46,889 INFO L85 PathProgramCache]: Analyzing trace with hash 103589336, now seen corresponding path program 5 times [2024-06-03 20:00:46,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:46,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327058405] [2024-06-03 20:00:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:46,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:48,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:48,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327058405] [2024-06-03 20:00:48,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327058405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:48,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:48,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:00:48,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520508724] [2024-06-03 20:00:48,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:48,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:00:48,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:48,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:00:48,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:00:48,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:48,331 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) [2024-06-03 20:00:48,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:48,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:48,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:48,986 INFO L124 PetriNetUnfolderBase]: 1891/2932 cut-off events. [2024-06-03 20:00:48,987 INFO L125 PetriNetUnfolderBase]: For 91618/91627 co-relation queries the response was YES. [2024-06-03 20:00:48,996 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. [2024-06-03 20:00:49,004 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 126 selfloop transitions, 37 changer transitions 0/170 dead transitions. [2024-06-03 20:00:49,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 170 transitions, 1603 flow [2024-06-03 20:00:49,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:00:49,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:00:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 20:00:49,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-03 20:00:49,006 INFO L175 Difference]: Start difference. First operand has 126 places, 138 transitions, 1115 flow. Second operand 8 states and 143 transitions. [2024-06-03 20:00:49,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 170 transitions, 1603 flow [2024-06-03 20:00:49,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 170 transitions, 1496 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 20:00:49,055 INFO L231 Difference]: Finished difference. Result has 128 places, 140 transitions, 1154 flow [2024-06-03 20:00:49,055 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} [2024-06-03 20:00:49,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-03 20:00:49,056 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 140 transitions, 1154 flow [2024-06-03 20:00:49,056 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) [2024-06-03 20:00:49,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:49,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:49,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:00:49,057 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)] === [2024-06-03 20:00:49,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:49,057 INFO L85 PathProgramCache]: Analyzing trace with hash 98079086, now seen corresponding path program 6 times [2024-06-03 20:00:49,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:49,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620138404] [2024-06-03 20:00:49,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:49,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:50,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:50,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620138404] [2024-06-03 20:00:50,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620138404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:50,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:50,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:00:50,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456644020] [2024-06-03 20:00:50,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:50,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:00:50,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:50,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:00:50,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:00:50,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:50,454 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) [2024-06-03 20:00:50,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:50,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:50,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:51,062 INFO L124 PetriNetUnfolderBase]: 1883/2922 cut-off events. [2024-06-03 20:00:51,063 INFO L125 PetriNetUnfolderBase]: For 89282/89291 co-relation queries the response was YES. [2024-06-03 20:00:51,074 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. [2024-06-03 20:00:51,084 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 133 selfloop transitions, 29 changer transitions 0/169 dead transitions. [2024-06-03 20:00:51,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 169 transitions, 1612 flow [2024-06-03 20:00:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:00:51,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:00:51,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:00:51,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-03 20:00:51,086 INFO L175 Difference]: Start difference. First operand has 128 places, 140 transitions, 1154 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:00:51,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 169 transitions, 1612 flow [2024-06-03 20:00:51,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 169 transitions, 1510 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:00:51,149 INFO L231 Difference]: Finished difference. Result has 130 places, 142 transitions, 1183 flow [2024-06-03 20:00:51,149 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} [2024-06-03 20:00:51,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-03 20:00:51,150 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 142 transitions, 1183 flow [2024-06-03 20:00:51,150 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) [2024-06-03 20:00:51,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:51,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:51,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:00:51,151 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)] === [2024-06-03 20:00:51,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:51,151 INFO L85 PathProgramCache]: Analyzing trace with hash 98232908, now seen corresponding path program 4 times [2024-06-03 20:00:51,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:51,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370439636] [2024-06-03 20:00:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:51,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:52,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:52,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370439636] [2024-06-03 20:00:52,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370439636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:52,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:52,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:00:52,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653013633] [2024-06-03 20:00:52,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:52,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:00:52,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:52,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:00:52,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:00:52,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:52,218 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) [2024-06-03 20:00:52,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:52,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:52,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:52,802 INFO L124 PetriNetUnfolderBase]: 2064/3121 cut-off events. [2024-06-03 20:00:52,802 INFO L125 PetriNetUnfolderBase]: For 90718/90722 co-relation queries the response was YES. [2024-06-03 20:00:52,814 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. [2024-06-03 20:00:52,823 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 143 selfloop transitions, 34 changer transitions 0/180 dead transitions. [2024-06-03 20:00:52,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 180 transitions, 1711 flow [2024-06-03 20:00:52,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:00:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:00:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 20:00:52,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-03 20:00:52,825 INFO L175 Difference]: Start difference. First operand has 130 places, 142 transitions, 1183 flow. Second operand 9 states and 148 transitions. [2024-06-03 20:00:52,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 180 transitions, 1711 flow [2024-06-03 20:00:52,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 180 transitions, 1598 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 20:00:52,889 INFO L231 Difference]: Finished difference. Result has 134 places, 148 transitions, 1242 flow [2024-06-03 20:00:52,889 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} [2024-06-03 20:00:52,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-03 20:00:52,890 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 148 transitions, 1242 flow [2024-06-03 20:00:52,890 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) [2024-06-03 20:00:52,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:52,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:52,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:00:52,890 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)] === [2024-06-03 20:00:52,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:52,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1524860945, now seen corresponding path program 1 times [2024-06-03 20:00:52,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:52,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115772958] [2024-06-03 20:00:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:52,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:53,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:53,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115772958] [2024-06-03 20:00:53,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115772958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:53,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:53,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:00:53,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425815737] [2024-06-03 20:00:53,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:53,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:00:53,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:53,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:00:53,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:00:53,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:53,579 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) [2024-06-03 20:00:53,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:53,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:53,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:54,361 INFO L124 PetriNetUnfolderBase]: 2116/3191 cut-off events. [2024-06-03 20:00:54,361 INFO L125 PetriNetUnfolderBase]: For 97568/97572 co-relation queries the response was YES. [2024-06-03 20:00:54,372 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. [2024-06-03 20:00:54,381 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 146 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2024-06-03 20:00:54,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 176 transitions, 1792 flow [2024-06-03 20:00:54,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:00:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:00:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 20:00:54,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-03 20:00:54,382 INFO L175 Difference]: Start difference. First operand has 134 places, 148 transitions, 1242 flow. Second operand 8 states and 126 transitions. [2024-06-03 20:00:54,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 176 transitions, 1792 flow [2024-06-03 20:00:54,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 176 transitions, 1664 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 20:00:54,451 INFO L231 Difference]: Finished difference. Result has 136 places, 154 transitions, 1261 flow [2024-06-03 20:00:54,451 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} [2024-06-03 20:00:54,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-03 20:00:54,452 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 154 transitions, 1261 flow [2024-06-03 20:00:54,452 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) [2024-06-03 20:00:54,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:54,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:54,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:00:54,452 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)] === [2024-06-03 20:00:54,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:54,453 INFO L85 PathProgramCache]: Analyzing trace with hash -459785095, now seen corresponding path program 2 times [2024-06-03 20:00:54,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:54,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353744558] [2024-06-03 20:00:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:54,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:55,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:55,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353744558] [2024-06-03 20:00:55,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353744558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:55,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:55,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:00:55,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106614469] [2024-06-03 20:00:55,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:55,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:00:55,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:55,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:00:55,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:00:55,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:55,050 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) [2024-06-03 20:00:55,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:55,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:55,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:55,672 INFO L124 PetriNetUnfolderBase]: 2104/3177 cut-off events. [2024-06-03 20:00:55,672 INFO L125 PetriNetUnfolderBase]: For 101345/101349 co-relation queries the response was YES. [2024-06-03 20:00:55,685 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. [2024-06-03 20:00:55,695 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 139 selfloop transitions, 25 changer transitions 0/167 dead transitions. [2024-06-03 20:00:55,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 167 transitions, 1629 flow [2024-06-03 20:00:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:00:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:00:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-03 20:00:55,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:00:55,696 INFO L175 Difference]: Start difference. First operand has 136 places, 154 transitions, 1261 flow. Second operand 6 states and 98 transitions. [2024-06-03 20:00:55,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 167 transitions, 1629 flow [2024-06-03 20:00:55,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 167 transitions, 1535 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 20:00:55,769 INFO L231 Difference]: Finished difference. Result has 138 places, 154 transitions, 1223 flow [2024-06-03 20:00:55,769 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} [2024-06-03 20:00:55,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-03 20:00:55,769 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 154 transitions, 1223 flow [2024-06-03 20:00:55,769 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) [2024-06-03 20:00:55,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:55,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:55,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:00:55,770 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)] === [2024-06-03 20:00:55,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:55,770 INFO L85 PathProgramCache]: Analyzing trace with hash 971532375, now seen corresponding path program 3 times [2024-06-03 20:00:55,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:55,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328085231] [2024-06-03 20:00:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:55,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:56,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:56,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328085231] [2024-06-03 20:00:56,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328085231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:56,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:56,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:00:56,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443024647] [2024-06-03 20:00:56,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:56,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:00:56,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:56,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:00:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:00:56,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:56,482 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) [2024-06-03 20:00:56,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:56,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:56,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:57,122 INFO L124 PetriNetUnfolderBase]: 2092/3161 cut-off events. [2024-06-03 20:00:57,122 INFO L125 PetriNetUnfolderBase]: For 104067/104071 co-relation queries the response was YES. [2024-06-03 20:00:57,136 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. [2024-06-03 20:00:57,146 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 139 selfloop transitions, 30 changer transitions 0/172 dead transitions. [2024-06-03 20:00:57,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 172 transitions, 1653 flow [2024-06-03 20:00:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:00:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:00:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-03 20:00:57,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-03 20:00:57,147 INFO L175 Difference]: Start difference. First operand has 138 places, 154 transitions, 1223 flow. Second operand 7 states and 110 transitions. [2024-06-03 20:00:57,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 172 transitions, 1653 flow [2024-06-03 20:00:57,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 172 transitions, 1603 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 20:00:57,216 INFO L231 Difference]: Finished difference. Result has 140 places, 157 transitions, 1291 flow [2024-06-03 20:00:57,216 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} [2024-06-03 20:00:57,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-03 20:00:57,217 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 157 transitions, 1291 flow [2024-06-03 20:00:57,217 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) [2024-06-03 20:00:57,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:57,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:57,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:00:57,217 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)] === [2024-06-03 20:00:57,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:57,218 INFO L85 PathProgramCache]: Analyzing trace with hash -939071869, now seen corresponding path program 1 times [2024-06-03 20:00:57,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:57,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101505477] [2024-06-03 20:00:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:57,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:58,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:58,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101505477] [2024-06-03 20:00:58,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101505477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:58,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:58,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:00:58,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201416473] [2024-06-03 20:00:58,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:58,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:00:58,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:58,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:00:58,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:00:58,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:58,187 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) [2024-06-03 20:00:58,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:58,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:58,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:58,686 INFO L124 PetriNetUnfolderBase]: 2110/3182 cut-off events. [2024-06-03 20:00:58,686 INFO L125 PetriNetUnfolderBase]: For 108576/108576 co-relation queries the response was YES. [2024-06-03 20:00:58,700 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. [2024-06-03 20:00:58,710 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 23 changer transitions 0/185 dead transitions. [2024-06-03 20:00:58,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 185 transitions, 1848 flow [2024-06-03 20:00:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:00:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:00:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-03 20:00:58,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-03 20:00:58,712 INFO L175 Difference]: Start difference. First operand has 140 places, 157 transitions, 1291 flow. Second operand 7 states and 113 transitions. [2024-06-03 20:00:58,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 185 transitions, 1848 flow [2024-06-03 20:00:58,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 185 transitions, 1752 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 20:00:58,789 INFO L231 Difference]: Finished difference. Result has 143 places, 165 transitions, 1335 flow [2024-06-03 20:00:58,789 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} [2024-06-03 20:00:58,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-03 20:00:58,790 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 165 transitions, 1335 flow [2024-06-03 20:00:58,790 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) [2024-06-03 20:00:58,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:58,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:58,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:00:58,790 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)] === [2024-06-03 20:00:58,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:58,791 INFO L85 PathProgramCache]: Analyzing trace with hash 765063633, now seen corresponding path program 2 times [2024-06-03 20:00:58,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:58,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898048821] [2024-06-03 20:00:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:58,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:59,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:59,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898048821] [2024-06-03 20:00:59,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898048821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:59,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:59,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:00:59,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382839826] [2024-06-03 20:00:59,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:59,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:00:59,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:59,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:00:59,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:00:59,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:59,668 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) [2024-06-03 20:00:59,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:59,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:59,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:00,165 INFO L124 PetriNetUnfolderBase]: 2120/3196 cut-off events. [2024-06-03 20:01:00,165 INFO L125 PetriNetUnfolderBase]: For 114793/114793 co-relation queries the response was YES. [2024-06-03 20:01:00,179 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. [2024-06-03 20:01:00,189 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 162 selfloop transitions, 19 changer transitions 0/184 dead transitions. [2024-06-03 20:01:00,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 184 transitions, 1781 flow [2024-06-03 20:01:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:01:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:01:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-03 20:01:00,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-03 20:01:00,191 INFO L175 Difference]: Start difference. First operand has 143 places, 165 transitions, 1335 flow. Second operand 7 states and 108 transitions. [2024-06-03 20:01:00,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 184 transitions, 1781 flow [2024-06-03 20:01:00,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 184 transitions, 1717 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-03 20:01:00,270 INFO L231 Difference]: Finished difference. Result has 147 places, 168 transitions, 1358 flow [2024-06-03 20:01:00,270 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} [2024-06-03 20:01:00,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-03 20:01:00,270 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 168 transitions, 1358 flow [2024-06-03 20:01:00,271 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) [2024-06-03 20:01:00,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:00,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:00,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:01:00,271 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)] === [2024-06-03 20:01:00,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:00,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1102507781, now seen corresponding path program 3 times [2024-06-03 20:01:00,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:00,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778308156] [2024-06-03 20:01:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:00,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:01,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:01,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778308156] [2024-06-03 20:01:01,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778308156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:01,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:01,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:01:01,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206154587] [2024-06-03 20:01:01,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:01,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:01:01,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:01,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:01:01,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:01:01,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:01,137 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) [2024-06-03 20:01:01,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:01,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:01,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:01,620 INFO L124 PetriNetUnfolderBase]: 2114/3188 cut-off events. [2024-06-03 20:01:01,620 INFO L125 PetriNetUnfolderBase]: For 119044/119044 co-relation queries the response was YES. [2024-06-03 20:01:01,634 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. [2024-06-03 20:01:01,644 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 14 changer transitions 0/181 dead transitions. [2024-06-03 20:01:01,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 181 transitions, 1758 flow [2024-06-03 20:01:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:01:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:01:01,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-03 20:01:01,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554006968641115 [2024-06-03 20:01:01,647 INFO L175 Difference]: Start difference. First operand has 147 places, 168 transitions, 1358 flow. Second operand 7 states and 102 transitions. [2024-06-03 20:01:01,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 181 transitions, 1758 flow [2024-06-03 20:01:01,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 181 transitions, 1704 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:01:01,726 INFO L231 Difference]: Finished difference. Result has 149 places, 169 transitions, 1349 flow [2024-06-03 20:01:01,726 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} [2024-06-03 20:01:01,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-03 20:01:01,727 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 169 transitions, 1349 flow [2024-06-03 20:01:01,727 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) [2024-06-03 20:01:01,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:01,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:01,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:01:01,728 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)] === [2024-06-03 20:01:01,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:01,728 INFO L85 PathProgramCache]: Analyzing trace with hash 971984200, now seen corresponding path program 1 times [2024-06-03 20:01:01,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:01,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527642827] [2024-06-03 20:01:01,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:01,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:02,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:02,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527642827] [2024-06-03 20:01:02,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527642827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:02,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:02,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:01:02,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484764412] [2024-06-03 20:01:02,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:02,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:01:02,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:02,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:01:02,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:01:02,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:02,508 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) [2024-06-03 20:01:02,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:02,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:02,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:03,021 INFO L124 PetriNetUnfolderBase]: 2111/3184 cut-off events. [2024-06-03 20:01:03,021 INFO L125 PetriNetUnfolderBase]: For 123462/123462 co-relation queries the response was YES. [2024-06-03 20:01:03,035 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. [2024-06-03 20:01:03,045 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 163 selfloop transitions, 16 changer transitions 0/182 dead transitions. [2024-06-03 20:01:03,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 182 transitions, 1776 flow [2024-06-03 20:01:03,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:01:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:01:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-06-03 20:01:03,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699186991869919 [2024-06-03 20:01:03,047 INFO L175 Difference]: Start difference. First operand has 149 places, 169 transitions, 1349 flow. Second operand 6 states and 91 transitions. [2024-06-03 20:01:03,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 182 transitions, 1776 flow [2024-06-03 20:01:03,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 182 transitions, 1744 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:01:03,136 INFO L231 Difference]: Finished difference. Result has 150 places, 172 transitions, 1405 flow [2024-06-03 20:01:03,136 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} [2024-06-03 20:01:03,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-03 20:01:03,138 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 172 transitions, 1405 flow [2024-06-03 20:01:03,139 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) [2024-06-03 20:01:03,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:03,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:03,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:01:03,139 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)] === [2024-06-03 20:01:03,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:03,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1887988959, now seen corresponding path program 1 times [2024-06-03 20:01:03,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:03,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432592240] [2024-06-03 20:01:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:03,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:04,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:04,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432592240] [2024-06-03 20:01:04,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432592240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:04,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:04,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:01:04,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522927079] [2024-06-03 20:01:04,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:04,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:01:04,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:04,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:01:04,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:01:04,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:04,684 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) [2024-06-03 20:01:04,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:04,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:04,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:05,501 INFO L124 PetriNetUnfolderBase]: 2279/3434 cut-off events. [2024-06-03 20:01:05,501 INFO L125 PetriNetUnfolderBase]: For 130714/130718 co-relation queries the response was YES. [2024-06-03 20:01:05,517 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. [2024-06-03 20:01:05,529 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 195 selfloop transitions, 47 changer transitions 0/245 dead transitions. [2024-06-03 20:01:05,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 245 transitions, 2328 flow [2024-06-03 20:01:05,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:01:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:01:05,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-03 20:01:05,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835920177383592 [2024-06-03 20:01:05,533 INFO L175 Difference]: Start difference. First operand has 150 places, 172 transitions, 1405 flow. Second operand 11 states and 173 transitions. [2024-06-03 20:01:05,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 245 transitions, 2328 flow [2024-06-03 20:01:05,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 245 transitions, 2278 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:01:05,643 INFO L231 Difference]: Finished difference. Result has 163 places, 207 transitions, 1884 flow [2024-06-03 20:01:05,643 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} [2024-06-03 20:01:05,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-03 20:01:05,652 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 207 transitions, 1884 flow [2024-06-03 20:01:05,652 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) [2024-06-03 20:01:05,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:05,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:05,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:01:05,653 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)] === [2024-06-03 20:01:05,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:05,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1396730181, now seen corresponding path program 2 times [2024-06-03 20:01:05,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:05,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294273982] [2024-06-03 20:01:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:05,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:07,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:07,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294273982] [2024-06-03 20:01:07,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294273982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:07,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:07,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:01:07,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447013202] [2024-06-03 20:01:07,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:07,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:01:07,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:07,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:01:07,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:01:07,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:07,413 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) [2024-06-03 20:01:07,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:07,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:07,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:08,107 INFO L124 PetriNetUnfolderBase]: 2274/3427 cut-off events. [2024-06-03 20:01:08,108 INFO L125 PetriNetUnfolderBase]: For 138701/138709 co-relation queries the response was YES. [2024-06-03 20:01:08,124 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. [2024-06-03 20:01:08,135 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 172 selfloop transitions, 70 changer transitions 0/245 dead transitions. [2024-06-03 20:01:08,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 245 transitions, 2570 flow [2024-06-03 20:01:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:01:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:01:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:01:08,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:01:08,136 INFO L175 Difference]: Start difference. First operand has 163 places, 207 transitions, 1884 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:01:08,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 245 transitions, 2570 flow [2024-06-03 20:01:08,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 245 transitions, 2490 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-06-03 20:01:08,254 INFO L231 Difference]: Finished difference. Result has 172 places, 213 transitions, 2102 flow [2024-06-03 20:01:08,254 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} [2024-06-03 20:01:08,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-03 20:01:08,255 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 213 transitions, 2102 flow [2024-06-03 20:01:08,255 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) [2024-06-03 20:01:08,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:08,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:08,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:01:08,256 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)] === [2024-06-03 20:01:08,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:08,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1512201089, now seen corresponding path program 1 times [2024-06-03 20:01:08,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:08,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256526511] [2024-06-03 20:01:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:08,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:09,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:09,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256526511] [2024-06-03 20:01:09,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256526511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:09,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:09,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:01:09,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587044670] [2024-06-03 20:01:09,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:09,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:01:09,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:09,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:01:09,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:01:09,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:09,852 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) [2024-06-03 20:01:09,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:09,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:09,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:10,698 INFO L124 PetriNetUnfolderBase]: 2349/3554 cut-off events. [2024-06-03 20:01:10,699 INFO L125 PetriNetUnfolderBase]: For 162116/162128 co-relation queries the response was YES. [2024-06-03 20:01:10,717 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. [2024-06-03 20:01:10,730 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 205 selfloop transitions, 48 changer transitions 0/256 dead transitions. [2024-06-03 20:01:10,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 256 transitions, 2812 flow [2024-06-03 20:01:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:01:10,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:01:10,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-03 20:01:10,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 20:01:10,731 INFO L175 Difference]: Start difference. First operand has 172 places, 213 transitions, 2102 flow. Second operand 10 states and 164 transitions. [2024-06-03 20:01:10,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 256 transitions, 2812 flow [2024-06-03 20:01:10,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 256 transitions, 2604 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-03 20:01:10,894 INFO L231 Difference]: Finished difference. Result has 176 places, 214 transitions, 2055 flow [2024-06-03 20:01:10,894 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} [2024-06-03 20:01:10,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-03 20:01:10,895 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 214 transitions, 2055 flow [2024-06-03 20:01:10,895 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) [2024-06-03 20:01:10,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:10,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:10,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:01:10,896 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)] === [2024-06-03 20:01:10,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:10,896 INFO L85 PathProgramCache]: Analyzing trace with hash 814532250, now seen corresponding path program 1 times [2024-06-03 20:01:10,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:10,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743916014] [2024-06-03 20:01:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:10,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:11,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:11,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743916014] [2024-06-03 20:01:11,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743916014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:11,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:11,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:01:11,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905796500] [2024-06-03 20:01:11,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:11,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:01:11,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:11,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:01:11,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:01:11,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:11,613 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) [2024-06-03 20:01:11,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:11,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:11,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:12,290 INFO L124 PetriNetUnfolderBase]: 2386/3604 cut-off events. [2024-06-03 20:01:12,290 INFO L125 PetriNetUnfolderBase]: For 151473/151481 co-relation queries the response was YES. [2024-06-03 20:01:12,309 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. [2024-06-03 20:01:12,321 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 35 changer transitions 0/241 dead transitions. [2024-06-03 20:01:12,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 241 transitions, 2788 flow [2024-06-03 20:01:12,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:01:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:01:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-03 20:01:12,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-03 20:01:12,322 INFO L175 Difference]: Start difference. First operand has 176 places, 214 transitions, 2055 flow. Second operand 7 states and 111 transitions. [2024-06-03 20:01:12,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 241 transitions, 2788 flow [2024-06-03 20:01:12,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 241 transitions, 2671 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 20:01:12,469 INFO L231 Difference]: Finished difference. Result has 177 places, 226 transitions, 2201 flow [2024-06-03 20:01:12,469 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} [2024-06-03 20:01:12,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-03 20:01:12,470 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 226 transitions, 2201 flow [2024-06-03 20:01:12,470 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) [2024-06-03 20:01:12,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:12,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:12,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:01:12,470 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)] === [2024-06-03 20:01:12,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:12,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1368431446, now seen corresponding path program 2 times [2024-06-03 20:01:12,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:12,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152462092] [2024-06-03 20:01:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:12,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:13,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:13,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152462092] [2024-06-03 20:01:13,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152462092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:13,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:13,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:01:13,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956311252] [2024-06-03 20:01:13,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:13,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:01:13,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:13,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:01:13,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:01:13,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:13,103 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) [2024-06-03 20:01:13,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:13,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:13,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:13,779 INFO L124 PetriNetUnfolderBase]: 2380/3596 cut-off events. [2024-06-03 20:01:13,779 INFO L125 PetriNetUnfolderBase]: For 154553/154561 co-relation queries the response was YES. [2024-06-03 20:01:13,797 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. [2024-06-03 20:01:13,808 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 209 selfloop transitions, 23 changer transitions 0/235 dead transitions. [2024-06-03 20:01:13,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 235 transitions, 2691 flow [2024-06-03 20:01:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:01:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:01:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-03 20:01:13,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-03 20:01:13,810 INFO L175 Difference]: Start difference. First operand has 177 places, 226 transitions, 2201 flow. Second operand 6 states and 93 transitions. [2024-06-03 20:01:13,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 235 transitions, 2691 flow [2024-06-03 20:01:13,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 235 transitions, 2607 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-03 20:01:13,950 INFO L231 Difference]: Finished difference. Result has 180 places, 226 transitions, 2173 flow [2024-06-03 20:01:13,950 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} [2024-06-03 20:01:13,951 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-03 20:01:13,951 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 226 transitions, 2173 flow [2024-06-03 20:01:13,951 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) [2024-06-03 20:01:13,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:13,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:13,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:01:13,952 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)] === [2024-06-03 20:01:13,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:13,952 INFO L85 PathProgramCache]: Analyzing trace with hash 637865763, now seen corresponding path program 2 times [2024-06-03 20:01:13,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:13,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776877275] [2024-06-03 20:01:13,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:13,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:15,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:15,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776877275] [2024-06-03 20:01:15,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776877275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:15,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:15,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:01:15,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174355466] [2024-06-03 20:01:15,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:15,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:01:15,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:15,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:01:15,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:01:15,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:15,468 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) [2024-06-03 20:01:15,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:15,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:15,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:16,259 INFO L124 PetriNetUnfolderBase]: 2455/3725 cut-off events. [2024-06-03 20:01:16,259 INFO L125 PetriNetUnfolderBase]: For 169774/169778 co-relation queries the response was YES. [2024-06-03 20:01:16,278 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. [2024-06-03 20:01:16,290 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 212 selfloop transitions, 52 changer transitions 0/267 dead transitions. [2024-06-03 20:01:16,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 267 transitions, 2891 flow [2024-06-03 20:01:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:01:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:01:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-03 20:01:16,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-03 20:01:16,293 INFO L175 Difference]: Start difference. First operand has 180 places, 226 transitions, 2173 flow. Second operand 10 states and 165 transitions. [2024-06-03 20:01:16,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 267 transitions, 2891 flow [2024-06-03 20:01:16,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 267 transitions, 2847 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 20:01:16,415 INFO L231 Difference]: Finished difference. Result has 186 places, 227 transitions, 2292 flow [2024-06-03 20:01:16,415 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} [2024-06-03 20:01:16,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-03 20:01:16,416 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 227 transitions, 2292 flow [2024-06-03 20:01:16,416 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) [2024-06-03 20:01:16,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:16,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:16,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:01:16,416 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)] === [2024-06-03 20:01:16,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:16,417 INFO L85 PathProgramCache]: Analyzing trace with hash 810594663, now seen corresponding path program 3 times [2024-06-03 20:01:16,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:16,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256878700] [2024-06-03 20:01:16,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:16,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:17,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:17,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256878700] [2024-06-03 20:01:17,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256878700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:17,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:17,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:01:17,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253178653] [2024-06-03 20:01:17,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:17,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:01:17,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:17,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:01:17,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:01:17,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:17,429 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) [2024-06-03 20:01:17,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:17,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:17,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:18,161 INFO L124 PetriNetUnfolderBase]: 2616/3988 cut-off events. [2024-06-03 20:01:18,161 INFO L125 PetriNetUnfolderBase]: For 194481/194489 co-relation queries the response was YES. [2024-06-03 20:01:18,183 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. [2024-06-03 20:01:18,196 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 45 changer transitions 0/272 dead transitions. [2024-06-03 20:01:18,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 272 transitions, 3278 flow [2024-06-03 20:01:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:01:18,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:01:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 20:01:18,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-03 20:01:18,198 INFO L175 Difference]: Start difference. First operand has 186 places, 227 transitions, 2292 flow. Second operand 9 states and 157 transitions. [2024-06-03 20:01:18,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 272 transitions, 3278 flow [2024-06-03 20:01:18,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 272 transitions, 3149 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 20:01:18,375 INFO L231 Difference]: Finished difference. Result has 188 places, 230 transitions, 2399 flow [2024-06-03 20:01:18,376 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} [2024-06-03 20:01:18,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-03 20:01:18,376 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 230 transitions, 2399 flow [2024-06-03 20:01:18,376 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) [2024-06-03 20:01:18,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:18,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:18,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:01:18,377 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)] === [2024-06-03 20:01:18,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:18,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1077256457, now seen corresponding path program 4 times [2024-06-03 20:01:18,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:18,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112360035] [2024-06-03 20:01:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:18,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:19,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:19,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112360035] [2024-06-03 20:01:19,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112360035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:19,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:19,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:01:19,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447989864] [2024-06-03 20:01:19,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:19,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:01:19,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:19,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:01:19,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:01:19,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:19,962 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) [2024-06-03 20:01:19,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:19,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:19,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:20,914 INFO L124 PetriNetUnfolderBase]: 2836/4331 cut-off events. [2024-06-03 20:01:20,914 INFO L125 PetriNetUnfolderBase]: For 209315/209315 co-relation queries the response was YES. [2024-06-03 20:01:20,940 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. [2024-06-03 20:01:20,955 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 264 selfloop transitions, 41 changer transitions 0/308 dead transitions. [2024-06-03 20:01:20,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 308 transitions, 3508 flow [2024-06-03 20:01:20,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:01:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:01:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-03 20:01:20,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-03 20:01:20,957 INFO L175 Difference]: Start difference. First operand has 188 places, 230 transitions, 2399 flow. Second operand 12 states and 194 transitions. [2024-06-03 20:01:20,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 308 transitions, 3508 flow [2024-06-03 20:01:21,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 308 transitions, 3403 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:01:21,206 INFO L231 Difference]: Finished difference. Result has 201 places, 258 transitions, 2800 flow [2024-06-03 20:01:21,206 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} [2024-06-03 20:01:21,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-03 20:01:21,207 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 258 transitions, 2800 flow [2024-06-03 20:01:21,207 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) [2024-06-03 20:01:21,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:21,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:21,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:01:21,207 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)] === [2024-06-03 20:01:21,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash -416729275, now seen corresponding path program 5 times [2024-06-03 20:01:21,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:21,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920042728] [2024-06-03 20:01:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:21,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:22,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:22,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920042728] [2024-06-03 20:01:22,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920042728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:22,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:22,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:01:22,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130139046] [2024-06-03 20:01:22,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:22,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:01:22,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:22,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:01:22,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:01:22,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:22,910 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) [2024-06-03 20:01:22,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:22,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:22,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:23,994 INFO L124 PetriNetUnfolderBase]: 2928/4479 cut-off events. [2024-06-03 20:01:23,995 INFO L125 PetriNetUnfolderBase]: For 222377/222385 co-relation queries the response was YES. [2024-06-03 20:01:24,023 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. [2024-06-03 20:01:24,040 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 233 selfloop transitions, 67 changer transitions 0/303 dead transitions. [2024-06-03 20:01:24,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 303 transitions, 3675 flow [2024-06-03 20:01:24,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:01:24,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:01:24,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-03 20:01:24,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-03 20:01:24,041 INFO L175 Difference]: Start difference. First operand has 201 places, 258 transitions, 2800 flow. Second operand 10 states and 166 transitions. [2024-06-03 20:01:24,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 303 transitions, 3675 flow [2024-06-03 20:01:24,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 303 transitions, 3597 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 20:01:24,339 INFO L231 Difference]: Finished difference. Result has 208 places, 263 transitions, 3003 flow [2024-06-03 20:01:24,339 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} [2024-06-03 20:01:24,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-03 20:01:24,340 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 263 transitions, 3003 flow [2024-06-03 20:01:24,340 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) [2024-06-03 20:01:24,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:24,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:24,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:01:24,340 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)] === [2024-06-03 20:01:24,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:24,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1159818571, now seen corresponding path program 6 times [2024-06-03 20:01:24,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:24,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203195163] [2024-06-03 20:01:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:24,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:25,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:25,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203195163] [2024-06-03 20:01:25,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203195163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:25,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:25,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:01:25,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455330095] [2024-06-03 20:01:25,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:25,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:01:25,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:25,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:01:25,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:01:25,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:25,584 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) [2024-06-03 20:01:25,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:25,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:25,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:26,552 INFO L124 PetriNetUnfolderBase]: 3262/4979 cut-off events. [2024-06-03 20:01:26,553 INFO L125 PetriNetUnfolderBase]: For 237009/237013 co-relation queries the response was YES. [2024-06-03 20:01:26,584 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. [2024-06-03 20:01:26,602 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 288 selfloop transitions, 65 changer transitions 0/356 dead transitions. [2024-06-03 20:01:26,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 356 transitions, 4516 flow [2024-06-03 20:01:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:01:26,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:01:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-03 20:01:26,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-03 20:01:26,604 INFO L175 Difference]: Start difference. First operand has 208 places, 263 transitions, 3003 flow. Second operand 12 states and 190 transitions. [2024-06-03 20:01:26,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 356 transitions, 4516 flow [2024-06-03 20:01:26,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 356 transitions, 4290 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 20:01:26,962 INFO L231 Difference]: Finished difference. Result has 218 places, 308 transitions, 3666 flow [2024-06-03 20:01:26,962 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} [2024-06-03 20:01:26,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-03 20:01:26,963 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 308 transitions, 3666 flow [2024-06-03 20:01:26,963 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) [2024-06-03 20:01:26,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:26,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:26,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:01:26,963 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)] === [2024-06-03 20:01:26,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:26,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1873596500, now seen corresponding path program 1 times [2024-06-03 20:01:26,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:26,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418494443] [2024-06-03 20:01:26,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:26,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:27,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:27,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418494443] [2024-06-03 20:01:27,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418494443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:27,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:27,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:01:27,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599237191] [2024-06-03 20:01:27,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:27,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:01:27,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:27,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:01:27,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:01:27,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:27,883 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) [2024-06-03 20:01:27,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:27,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:27,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:28,817 INFO L124 PetriNetUnfolderBase]: 3270/4993 cut-off events. [2024-06-03 20:01:28,818 INFO L125 PetriNetUnfolderBase]: For 221208/221216 co-relation queries the response was YES. [2024-06-03 20:01:28,851 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. [2024-06-03 20:01:28,869 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 288 selfloop transitions, 28 changer transitions 0/319 dead transitions. [2024-06-03 20:01:28,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 319 transitions, 4356 flow [2024-06-03 20:01:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:01:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:01:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-03 20:01:28,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-03 20:01:28,871 INFO L175 Difference]: Start difference. First operand has 218 places, 308 transitions, 3666 flow. Second operand 6 states and 93 transitions. [2024-06-03 20:01:28,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 319 transitions, 4356 flow [2024-06-03 20:01:29,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 319 transitions, 4214 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-03 20:01:29,342 INFO L231 Difference]: Finished difference. Result has 216 places, 310 transitions, 3626 flow [2024-06-03 20:01:29,342 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} [2024-06-03 20:01:29,346 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-03 20:01:29,346 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 310 transitions, 3626 flow [2024-06-03 20:01:29,347 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) [2024-06-03 20:01:29,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:29,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:29,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:01:29,348 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)] === [2024-06-03 20:01:29,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:29,349 INFO L85 PathProgramCache]: Analyzing trace with hash 945797496, now seen corresponding path program 3 times [2024-06-03 20:01:29,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:29,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183235152] [2024-06-03 20:01:29,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:29,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:30,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:30,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183235152] [2024-06-03 20:01:30,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183235152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:30,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:30,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:01:30,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339983271] [2024-06-03 20:01:30,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:30,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:01:30,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:01:30,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:01:30,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:30,172 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) [2024-06-03 20:01:30,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:30,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:30,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:31,111 INFO L124 PetriNetUnfolderBase]: 3280/5007 cut-off events. [2024-06-03 20:01:31,111 INFO L125 PetriNetUnfolderBase]: For 224173/224181 co-relation queries the response was YES. [2024-06-03 20:01:31,140 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. [2024-06-03 20:01:31,156 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 294 selfloop transitions, 32 changer transitions 0/329 dead transitions. [2024-06-03 20:01:31,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 329 transitions, 4384 flow [2024-06-03 20:01:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:01:31,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:01:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-03 20:01:31,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-03 20:01:31,158 INFO L175 Difference]: Start difference. First operand has 216 places, 310 transitions, 3626 flow. Second operand 7 states and 109 transitions. [2024-06-03 20:01:31,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 329 transitions, 4384 flow [2024-06-03 20:01:31,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 329 transitions, 4306 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 20:01:31,510 INFO L231 Difference]: Finished difference. Result has 219 places, 313 transitions, 3680 flow [2024-06-03 20:01:31,510 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} [2024-06-03 20:01:31,511 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-03 20:01:31,511 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 313 transitions, 3680 flow [2024-06-03 20:01:31,511 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) [2024-06-03 20:01:31,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:31,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:31,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:01:31,512 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)] === [2024-06-03 20:01:31,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:31,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2052838260, now seen corresponding path program 4 times [2024-06-03 20:01:31,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:31,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440742775] [2024-06-03 20:01:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:31,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:32,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:32,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440742775] [2024-06-03 20:01:32,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440742775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:32,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:32,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:01:32,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672500925] [2024-06-03 20:01:32,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:32,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:01:32,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:32,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:01:32,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:01:32,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:32,218 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) [2024-06-03 20:01:32,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:32,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:32,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:33,118 INFO L124 PetriNetUnfolderBase]: 3298/5032 cut-off events. [2024-06-03 20:01:33,118 INFO L125 PetriNetUnfolderBase]: For 232801/232809 co-relation queries the response was YES. [2024-06-03 20:01:33,150 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. [2024-06-03 20:01:33,168 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 283 selfloop transitions, 52 changer transitions 0/338 dead transitions. [2024-06-03 20:01:33,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 338 transitions, 4636 flow [2024-06-03 20:01:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:01:33,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:01:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-03 20:01:33,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:01:33,169 INFO L175 Difference]: Start difference. First operand has 219 places, 313 transitions, 3680 flow. Second operand 7 states and 112 transitions. [2024-06-03 20:01:33,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 338 transitions, 4636 flow [2024-06-03 20:01:33,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 338 transitions, 4496 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 20:01:33,516 INFO L231 Difference]: Finished difference. Result has 222 places, 322 transitions, 3819 flow [2024-06-03 20:01:33,517 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} [2024-06-03 20:01:33,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-03 20:01:33,517 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 322 transitions, 3819 flow [2024-06-03 20:01:33,517 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) [2024-06-03 20:01:33,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:33,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:33,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:01:33,518 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)] === [2024-06-03 20:01:33,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:33,518 INFO L85 PathProgramCache]: Analyzing trace with hash 286728039, now seen corresponding path program 7 times [2024-06-03 20:01:33,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:33,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176601228] [2024-06-03 20:01:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:33,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:35,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:35,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176601228] [2024-06-03 20:01:35,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176601228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:35,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:35,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:01:35,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724194230] [2024-06-03 20:01:35,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:35,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:01:35,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:35,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:01:35,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:01:35,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:35,140 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) [2024-06-03 20:01:35,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:35,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:35,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:36,388 INFO L124 PetriNetUnfolderBase]: 3500/5344 cut-off events. [2024-06-03 20:01:36,388 INFO L125 PetriNetUnfolderBase]: For 263970/263978 co-relation queries the response was YES. [2024-06-03 20:01:36,426 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. [2024-06-03 20:01:36,447 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 291 selfloop transitions, 93 changer transitions 0/387 dead transitions. [2024-06-03 20:01:36,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 387 transitions, 5061 flow [2024-06-03 20:01:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:01:36,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:01:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-03 20:01:36,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.401330376940133 [2024-06-03 20:01:36,449 INFO L175 Difference]: Start difference. First operand has 222 places, 322 transitions, 3819 flow. Second operand 11 states and 181 transitions. [2024-06-03 20:01:36,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 387 transitions, 5061 flow [2024-06-03 20:01:36,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 387 transitions, 4975 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-03 20:01:36,871 INFO L231 Difference]: Finished difference. Result has 234 places, 343 transitions, 4319 flow [2024-06-03 20:01:36,872 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} [2024-06-03 20:01:36,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-03 20:01:36,872 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 343 transitions, 4319 flow [2024-06-03 20:01:36,872 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) [2024-06-03 20:01:36,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:36,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:36,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:01:36,873 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)] === [2024-06-03 20:01:36,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:36,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1836093783, now seen corresponding path program 8 times [2024-06-03 20:01:36,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:36,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699807326] [2024-06-03 20:01:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:36,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:38,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:38,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699807326] [2024-06-03 20:01:38,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699807326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:38,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:38,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:01:38,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791071799] [2024-06-03 20:01:38,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:38,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:01:38,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:38,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:01:38,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:01:38,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:38,328 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) [2024-06-03 20:01:38,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:38,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:38,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:39,623 INFO L124 PetriNetUnfolderBase]: 3614/5528 cut-off events. [2024-06-03 20:01:39,624 INFO L125 PetriNetUnfolderBase]: For 274430/274438 co-relation queries the response was YES. [2024-06-03 20:01:39,656 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. [2024-06-03 20:01:39,675 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 343 selfloop transitions, 49 changer transitions 0/395 dead transitions. [2024-06-03 20:01:39,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 395 transitions, 5440 flow [2024-06-03 20:01:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:01:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:01:39,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-03 20:01:39,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924611973392461 [2024-06-03 20:01:39,677 INFO L175 Difference]: Start difference. First operand has 234 places, 343 transitions, 4319 flow. Second operand 11 states and 177 transitions. [2024-06-03 20:01:39,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 395 transitions, 5440 flow [2024-06-03 20:01:40,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 395 transitions, 5225 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-03 20:01:40,105 INFO L231 Difference]: Finished difference. Result has 243 places, 352 transitions, 4408 flow [2024-06-03 20:01:40,105 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} [2024-06-03 20:01:40,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-03 20:01:40,106 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 352 transitions, 4408 flow [2024-06-03 20:01:40,106 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) [2024-06-03 20:01:40,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:40,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:40,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:01:40,106 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)] === [2024-06-03 20:01:40,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:40,107 INFO L85 PathProgramCache]: Analyzing trace with hash -925893752, now seen corresponding path program 5 times [2024-06-03 20:01:40,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:40,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337815651] [2024-06-03 20:01:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:40,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:40,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:40,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337815651] [2024-06-03 20:01:40,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337815651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:40,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:40,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:01:40,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964915852] [2024-06-03 20:01:40,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:40,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:01:40,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:40,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:01:40,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:01:40,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:40,786 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) [2024-06-03 20:01:40,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:40,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:40,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:41,895 INFO L124 PetriNetUnfolderBase]: 3624/5542 cut-off events. [2024-06-03 20:01:41,895 INFO L125 PetriNetUnfolderBase]: For 265473/265481 co-relation queries the response was YES. [2024-06-03 20:01:41,929 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. [2024-06-03 20:01:41,947 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 330 selfloop transitions, 34 changer transitions 0/367 dead transitions. [2024-06-03 20:01:41,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 367 transitions, 5340 flow [2024-06-03 20:01:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:01:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:01:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-03 20:01:41,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693379790940767 [2024-06-03 20:01:41,949 INFO L175 Difference]: Start difference. First operand has 243 places, 352 transitions, 4408 flow. Second operand 7 states and 106 transitions. [2024-06-03 20:01:41,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 367 transitions, 5340 flow [2024-06-03 20:01:42,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 367 transitions, 5150 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-03 20:01:42,311 INFO L231 Difference]: Finished difference. Result has 244 places, 355 transitions, 4358 flow [2024-06-03 20:01:42,311 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} [2024-06-03 20:01:42,312 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-03 20:01:42,312 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 355 transitions, 4358 flow [2024-06-03 20:01:42,312 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) [2024-06-03 20:01:42,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:42,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:42,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:01:42,312 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)] === [2024-06-03 20:01:42,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash 52737164, now seen corresponding path program 6 times [2024-06-03 20:01:42,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:42,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203408627] [2024-06-03 20:01:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:42,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:42,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:42,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203408627] [2024-06-03 20:01:42,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203408627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:42,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:42,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:01:42,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797935108] [2024-06-03 20:01:42,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:42,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:01:42,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:42,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:01:42,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:01:42,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:42,991 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) [2024-06-03 20:01:42,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:42,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:42,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:44,052 INFO L124 PetriNetUnfolderBase]: 3618/5534 cut-off events. [2024-06-03 20:01:44,052 INFO L125 PetriNetUnfolderBase]: For 264111/264119 co-relation queries the response was YES. [2024-06-03 20:01:44,087 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. [2024-06-03 20:01:44,105 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 336 selfloop transitions, 26 changer transitions 0/365 dead transitions. [2024-06-03 20:01:44,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 365 transitions, 5114 flow [2024-06-03 20:01:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:01:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:01:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-03 20:01:44,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588850174216028 [2024-06-03 20:01:44,107 INFO L175 Difference]: Start difference. First operand has 244 places, 355 transitions, 4358 flow. Second operand 7 states and 103 transitions. [2024-06-03 20:01:44,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 365 transitions, 5114 flow [2024-06-03 20:01:44,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 365 transitions, 4933 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-03 20:01:44,464 INFO L231 Difference]: Finished difference. Result has 246 places, 355 transitions, 4235 flow [2024-06-03 20:01:44,464 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} [2024-06-03 20:01:44,465 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-03 20:01:44,465 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 355 transitions, 4235 flow [2024-06-03 20:01:44,465 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) [2024-06-03 20:01:44,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:44,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:44,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:01:44,466 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)] === [2024-06-03 20:01:44,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:44,466 INFO L85 PathProgramCache]: Analyzing trace with hash -931598744, now seen corresponding path program 2 times [2024-06-03 20:01:44,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:44,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124345245] [2024-06-03 20:01:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:44,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:45,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:45,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124345245] [2024-06-03 20:01:45,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124345245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:45,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:45,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:01:45,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128562367] [2024-06-03 20:01:45,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:45,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:01:45,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:45,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:01:45,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:01:45,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:45,358 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) [2024-06-03 20:01:45,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:45,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:45,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:46,463 INFO L124 PetriNetUnfolderBase]: 3626/5546 cut-off events. [2024-06-03 20:01:46,463 INFO L125 PetriNetUnfolderBase]: For 271304/271312 co-relation queries the response was YES. [2024-06-03 20:01:46,501 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. [2024-06-03 20:01:46,520 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 333 selfloop transitions, 31 changer transitions 0/367 dead transitions. [2024-06-03 20:01:46,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 367 transitions, 5029 flow [2024-06-03 20:01:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:01:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:01:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-03 20:01:46,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-03 20:01:46,522 INFO L175 Difference]: Start difference. First operand has 246 places, 355 transitions, 4235 flow. Second operand 7 states and 104 transitions. [2024-06-03 20:01:46,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 367 transitions, 5029 flow [2024-06-03 20:01:47,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 367 transitions, 4912 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 20:01:47,025 INFO L231 Difference]: Finished difference. Result has 246 places, 357 transitions, 4229 flow [2024-06-03 20:01:47,026 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} [2024-06-03 20:01:47,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-03 20:01:47,026 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 357 transitions, 4229 flow [2024-06-03 20:01:47,026 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) [2024-06-03 20:01:47,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:47,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:47,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:01:47,027 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)] === [2024-06-03 20:01:47,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:47,027 INFO L85 PathProgramCache]: Analyzing trace with hash 67030892, now seen corresponding path program 3 times [2024-06-03 20:01:47,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:47,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279748955] [2024-06-03 20:01:47,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:47,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:47,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:47,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279748955] [2024-06-03 20:01:47,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279748955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:47,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:47,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:01:47,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278686443] [2024-06-03 20:01:47,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:47,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:01:47,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:47,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:01:47,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:01:47,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:47,921 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) [2024-06-03 20:01:47,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:47,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:47,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:49,077 INFO L124 PetriNetUnfolderBase]: 3621/5539 cut-off events. [2024-06-03 20:01:49,077 INFO L125 PetriNetUnfolderBase]: For 277776/277784 co-relation queries the response was YES. [2024-06-03 20:01:49,119 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. [2024-06-03 20:01:49,142 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 332 selfloop transitions, 35 changer transitions 0/370 dead transitions. [2024-06-03 20:01:49,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 370 transitions, 5035 flow [2024-06-03 20:01:49,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:01:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:01:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-03 20:01:49,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-03 20:01:49,144 INFO L175 Difference]: Start difference. First operand has 246 places, 357 transitions, 4229 flow. Second operand 7 states and 104 transitions. [2024-06-03 20:01:49,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 370 transitions, 5035 flow [2024-06-03 20:01:49,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 370 transitions, 4940 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 20:01:49,737 INFO L231 Difference]: Finished difference. Result has 248 places, 359 transitions, 4257 flow [2024-06-03 20:01:49,737 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} [2024-06-03 20:01:49,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-03 20:01:49,737 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 359 transitions, 4257 flow [2024-06-03 20:01:49,738 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) [2024-06-03 20:01:49,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:49,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:49,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:01:49,738 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)] === [2024-06-03 20:01:49,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:49,738 INFO L85 PathProgramCache]: Analyzing trace with hash 804099543, now seen corresponding path program 9 times [2024-06-03 20:01:49,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:49,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011849590] [2024-06-03 20:01:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:49,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:50,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:50,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011849590] [2024-06-03 20:01:50,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011849590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:50,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:50,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:01:50,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781747987] [2024-06-03 20:01:50,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:50,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:01:50,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:50,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:01:50,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:01:50,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:50,928 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) [2024-06-03 20:01:50,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:50,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:50,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:52,066 INFO L124 PetriNetUnfolderBase]: 3646/5586 cut-off events. [2024-06-03 20:01:52,067 INFO L125 PetriNetUnfolderBase]: For 299281/299289 co-relation queries the response was YES. [2024-06-03 20:01:52,106 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. [2024-06-03 20:01:52,125 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 261 selfloop transitions, 138 changer transitions 0/402 dead transitions. [2024-06-03 20:01:52,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 402 transitions, 5327 flow [2024-06-03 20:01:52,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:01:52,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:01:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-03 20:01:52,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-03 20:01:52,127 INFO L175 Difference]: Start difference. First operand has 248 places, 359 transitions, 4257 flow. Second operand 10 states and 168 transitions. [2024-06-03 20:01:52,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 402 transitions, 5327 flow [2024-06-03 20:01:52,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 402 transitions, 5220 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 20:01:52,772 INFO L231 Difference]: Finished difference. Result has 253 places, 361 transitions, 4549 flow [2024-06-03 20:01:52,772 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} [2024-06-03 20:01:52,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-03 20:01:52,772 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 361 transitions, 4549 flow [2024-06-03 20:01:52,773 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) [2024-06-03 20:01:52,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:52,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:52,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:01:52,773 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)] === [2024-06-03 20:01:52,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:52,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2057476604, now seen corresponding path program 1 times [2024-06-03 20:01:52,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:52,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460812710] [2024-06-03 20:01:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:52,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:53,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:53,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460812710] [2024-06-03 20:01:53,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460812710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:53,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:53,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:01:53,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366764172] [2024-06-03 20:01:53,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:53,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:01:53,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:53,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:01:53,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:01:53,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:53,993 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) [2024-06-03 20:01:53,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:53,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:53,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:55,106 INFO L124 PetriNetUnfolderBase]: 3666/5614 cut-off events. [2024-06-03 20:01:55,106 INFO L125 PetriNetUnfolderBase]: For 299130/299138 co-relation queries the response was YES. [2024-06-03 20:01:55,147 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. [2024-06-03 20:01:55,167 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 60 changer transitions 0/385 dead transitions. [2024-06-03 20:01:55,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 385 transitions, 5457 flow [2024-06-03 20:01:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:01:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:01:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 20:01:55,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-03 20:01:55,169 INFO L175 Difference]: Start difference. First operand has 253 places, 361 transitions, 4549 flow. Second operand 8 states and 126 transitions. [2024-06-03 20:01:55,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 385 transitions, 5457 flow [2024-06-03 20:01:55,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 385 transitions, 5166 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-03 20:01:55,791 INFO L231 Difference]: Finished difference. Result has 253 places, 365 transitions, 4478 flow [2024-06-03 20:01:55,792 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} [2024-06-03 20:01:55,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-03 20:01:55,792 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 365 transitions, 4478 flow [2024-06-03 20:01:55,792 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) [2024-06-03 20:01:55,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:55,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:55,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:01:55,793 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)] === [2024-06-03 20:01:55,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:55,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2057471954, now seen corresponding path program 2 times [2024-06-03 20:01:55,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:55,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91791295] [2024-06-03 20:01:55,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:55,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:56,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:56,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91791295] [2024-06-03 20:01:56,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91791295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:56,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:56,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:01:56,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432297670] [2024-06-03 20:01:56,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:56,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:01:56,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:56,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:01:56,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:01:56,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:56,896 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) [2024-06-03 20:01:56,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:56,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:56,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:57,971 INFO L124 PetriNetUnfolderBase]: 3684/5644 cut-off events. [2024-06-03 20:01:57,972 INFO L125 PetriNetUnfolderBase]: For 290859/290859 co-relation queries the response was YES. [2024-06-03 20:01:58,015 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. [2024-06-03 20:01:58,036 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 355 selfloop transitions, 37 changer transitions 0/395 dead transitions. [2024-06-03 20:01:58,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 395 transitions, 5633 flow [2024-06-03 20:01:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:01:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:01:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 20:01:58,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-03 20:01:58,037 INFO L175 Difference]: Start difference. First operand has 253 places, 365 transitions, 4478 flow. Second operand 8 states and 127 transitions. [2024-06-03 20:01:58,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 395 transitions, 5633 flow [2024-06-03 20:01:58,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 395 transitions, 5409 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-03 20:01:58,589 INFO L231 Difference]: Finished difference. Result has 257 places, 374 transitions, 4554 flow [2024-06-03 20:01:58,590 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} [2024-06-03 20:01:58,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-03 20:01:58,590 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 374 transitions, 4554 flow [2024-06-03 20:01:58,590 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) [2024-06-03 20:01:58,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:58,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:58,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:01:58,591 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)] === [2024-06-03 20:01:58,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash 560995808, now seen corresponding path program 1 times [2024-06-03 20:01:58,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:58,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414503415] [2024-06-03 20:01:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:58,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:59,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:59,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414503415] [2024-06-03 20:01:59,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414503415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:59,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:59,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:01:59,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640217787] [2024-06-03 20:01:59,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:59,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:01:59,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:01:59,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:01:59,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:59,590 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) [2024-06-03 20:01:59,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:59,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:59,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:00,683 INFO L124 PetriNetUnfolderBase]: 3692/5656 cut-off events. [2024-06-03 20:02:00,683 INFO L125 PetriNetUnfolderBase]: For 301197/301197 co-relation queries the response was YES. [2024-06-03 20:02:00,726 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. [2024-06-03 20:02:00,746 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 369 selfloop transitions, 19 changer transitions 0/391 dead transitions. [2024-06-03 20:02:00,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 391 transitions, 5422 flow [2024-06-03 20:02:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-03 20:02:00,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-03 20:02:00,748 INFO L175 Difference]: Start difference. First operand has 257 places, 374 transitions, 4554 flow. Second operand 7 states and 107 transitions. [2024-06-03 20:02:00,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 391 transitions, 5422 flow [2024-06-03 20:02:01,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 391 transitions, 5327 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-03 20:02:01,373 INFO L231 Difference]: Finished difference. Result has 261 places, 376 transitions, 4546 flow [2024-06-03 20:02:01,374 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} [2024-06-03 20:02:01,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-03 20:02:01,374 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 376 transitions, 4546 flow [2024-06-03 20:02:01,374 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) [2024-06-03 20:02:01,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:01,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:01,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:02:01,375 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)] === [2024-06-03 20:02:01,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:01,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2052830324, now seen corresponding path program 3 times [2024-06-03 20:02:01,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:01,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967442903] [2024-06-03 20:02:01,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:01,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:02,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:02,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967442903] [2024-06-03 20:02:02,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967442903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:02,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:02,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:02,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249379730] [2024-06-03 20:02:02,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:02,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:02,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:02,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:02,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:02,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:02,370 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) [2024-06-03 20:02:02,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:02,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:02,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:03,478 INFO L124 PetriNetUnfolderBase]: 3712/5684 cut-off events. [2024-06-03 20:02:03,479 INFO L125 PetriNetUnfolderBase]: For 312928/312928 co-relation queries the response was YES. [2024-06-03 20:02:03,523 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. [2024-06-03 20:02:03,543 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 371 selfloop transitions, 25 changer transitions 0/399 dead transitions. [2024-06-03 20:02:03,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 399 transitions, 5523 flow [2024-06-03 20:02:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:02:03,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:02:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-03 20:02:03,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-03 20:02:03,546 INFO L175 Difference]: Start difference. First operand has 261 places, 376 transitions, 4546 flow. Second operand 8 states and 121 transitions. [2024-06-03 20:02:03,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 399 transitions, 5523 flow [2024-06-03 20:02:04,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 399 transitions, 5452 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 20:02:04,127 INFO L231 Difference]: Finished difference. Result has 264 places, 381 transitions, 4633 flow [2024-06-03 20:02:04,143 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} [2024-06-03 20:02:04,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-03 20:02:04,144 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 381 transitions, 4633 flow [2024-06-03 20:02:04,144 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) [2024-06-03 20:02:04,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:04,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:04,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:02:04,145 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)] === [2024-06-03 20:02:04,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:04,145 INFO L85 PathProgramCache]: Analyzing trace with hash -921470514, now seen corresponding path program 2 times [2024-06-03 20:02:04,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:04,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140108028] [2024-06-03 20:02:04,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:04,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:04,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:04,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140108028] [2024-06-03 20:02:04,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140108028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:04,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:04,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:04,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377767785] [2024-06-03 20:02:04,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:04,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:04,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:04,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:04,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:05,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:05,075 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) [2024-06-03 20:02:05,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:05,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:05,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:06,185 INFO L124 PetriNetUnfolderBase]: 3720/5696 cut-off events. [2024-06-03 20:02:06,186 INFO L125 PetriNetUnfolderBase]: For 320291/320291 co-relation queries the response was YES. [2024-06-03 20:02:06,227 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. [2024-06-03 20:02:06,246 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 376 selfloop transitions, 15 changer transitions 0/394 dead transitions. [2024-06-03 20:02:06,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 394 transitions, 5489 flow [2024-06-03 20:02:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-03 20:02:06,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519163763066202 [2024-06-03 20:02:06,248 INFO L175 Difference]: Start difference. First operand has 264 places, 381 transitions, 4633 flow. Second operand 7 states and 101 transitions. [2024-06-03 20:02:06,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 394 transitions, 5489 flow [2024-06-03 20:02:06,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 394 transitions, 5383 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 20:02:06,908 INFO L231 Difference]: Finished difference. Result has 265 places, 383 transitions, 4612 flow [2024-06-03 20:02:06,908 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} [2024-06-03 20:02:06,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-03 20:02:06,909 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 383 transitions, 4612 flow [2024-06-03 20:02:06,909 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) [2024-06-03 20:02:06,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:06,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:06,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:02:06,909 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)] === [2024-06-03 20:02:06,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:06,910 INFO L85 PathProgramCache]: Analyzing trace with hash 58465964, now seen corresponding path program 3 times [2024-06-03 20:02:06,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:06,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878922464] [2024-06-03 20:02:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:06,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:07,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:07,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878922464] [2024-06-03 20:02:07,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878922464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:07,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:07,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:02:07,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733883281] [2024-06-03 20:02:07,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:07,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:02:07,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:07,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:02:07,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:02:07,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:07,819 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) [2024-06-03 20:02:07,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:07,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:07,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:08,936 INFO L124 PetriNetUnfolderBase]: 3728/5708 cut-off events. [2024-06-03 20:02:08,936 INFO L125 PetriNetUnfolderBase]: For 330632/330632 co-relation queries the response was YES. [2024-06-03 20:02:08,977 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. [2024-06-03 20:02:08,996 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 379 selfloop transitions, 14 changer transitions 0/396 dead transitions. [2024-06-03 20:02:08,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 396 transitions, 5482 flow [2024-06-03 20:02:08,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-03 20:02:08,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519163763066202 [2024-06-03 20:02:08,998 INFO L175 Difference]: Start difference. First operand has 265 places, 383 transitions, 4612 flow. Second operand 7 states and 101 transitions. [2024-06-03 20:02:08,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 396 transitions, 5482 flow [2024-06-03 20:02:09,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 396 transitions, 5413 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 20:02:09,591 INFO L231 Difference]: Finished difference. Result has 267 places, 385 transitions, 4630 flow [2024-06-03 20:02:09,592 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} [2024-06-03 20:02:09,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-03 20:02:09,592 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 385 transitions, 4630 flow [2024-06-03 20:02:09,592 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) [2024-06-03 20:02:09,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:09,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:09,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:02:09,593 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)] === [2024-06-03 20:02:09,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:09,593 INFO L85 PathProgramCache]: Analyzing trace with hash -925885816, now seen corresponding path program 4 times [2024-06-03 20:02:09,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:09,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264336242] [2024-06-03 20:02:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:09,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:10,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:10,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264336242] [2024-06-03 20:02:10,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264336242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:10,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:10,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:10,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708756779] [2024-06-03 20:02:10,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:10,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:10,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:10,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:10,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:10,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:10,606 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) [2024-06-03 20:02:10,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:10,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:10,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:11,740 INFO L124 PetriNetUnfolderBase]: 3732/5714 cut-off events. [2024-06-03 20:02:11,740 INFO L125 PetriNetUnfolderBase]: For 340071/340071 co-relation queries the response was YES. [2024-06-03 20:02:11,787 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. [2024-06-03 20:02:11,806 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 379 selfloop transitions, 20 changer transitions 0/402 dead transitions. [2024-06-03 20:02:11,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 402 transitions, 5571 flow [2024-06-03 20:02:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:02:11,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:02:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-03 20:02:11,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35060975609756095 [2024-06-03 20:02:11,807 INFO L175 Difference]: Start difference. First operand has 267 places, 385 transitions, 4630 flow. Second operand 8 states and 115 transitions. [2024-06-03 20:02:11,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 402 transitions, 5571 flow [2024-06-03 20:02:12,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 402 transitions, 5438 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-03 20:02:12,485 INFO L231 Difference]: Finished difference. Result has 270 places, 388 transitions, 4637 flow [2024-06-03 20:02:12,485 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} [2024-06-03 20:02:12,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-03 20:02:12,485 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 388 transitions, 4637 flow [2024-06-03 20:02:12,486 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) [2024-06-03 20:02:12,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:12,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:12,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:02:12,486 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)] === [2024-06-03 20:02:12,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:12,486 INFO L85 PathProgramCache]: Analyzing trace with hash 66739926, now seen corresponding path program 1 times [2024-06-03 20:02:12,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:12,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493844421] [2024-06-03 20:02:12,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:12,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:13,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:13,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493844421] [2024-06-03 20:02:13,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493844421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:13,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:13,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:13,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400427882] [2024-06-03 20:02:13,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:13,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:13,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:13,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:13,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:13,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:13,607 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) [2024-06-03 20:02:13,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:13,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:13,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:14,717 INFO L124 PetriNetUnfolderBase]: 3729/5710 cut-off events. [2024-06-03 20:02:14,717 INFO L125 PetriNetUnfolderBase]: For 343281/343281 co-relation queries the response was YES. [2024-06-03 20:02:14,761 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. [2024-06-03 20:02:14,781 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 376 selfloop transitions, 23 changer transitions 0/402 dead transitions. [2024-06-03 20:02:14,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 402 transitions, 5541 flow [2024-06-03 20:02:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-03 20:02:14,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588850174216028 [2024-06-03 20:02:14,798 INFO L175 Difference]: Start difference. First operand has 270 places, 388 transitions, 4637 flow. Second operand 7 states and 103 transitions. [2024-06-03 20:02:14,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 402 transitions, 5541 flow [2024-06-03 20:02:15,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 402 transitions, 5437 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-03 20:02:15,418 INFO L231 Difference]: Finished difference. Result has 271 places, 391 transitions, 4661 flow [2024-06-03 20:02:15,418 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} [2024-06-03 20:02:15,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-03 20:02:15,419 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 391 transitions, 4661 flow [2024-06-03 20:02:15,419 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) [2024-06-03 20:02:15,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:15,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:15,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:02:15,419 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)] === [2024-06-03 20:02:15,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:15,420 INFO L85 PathProgramCache]: Analyzing trace with hash 66740174, now seen corresponding path program 4 times [2024-06-03 20:02:15,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:15,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707114476] [2024-06-03 20:02:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:15,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:16,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:16,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707114476] [2024-06-03 20:02:16,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707114476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:16,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:16,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:16,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632684659] [2024-06-03 20:02:16,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:16,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:16,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:16,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:16,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:16,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:16,360 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) [2024-06-03 20:02:16,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:16,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:16,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:17,523 INFO L124 PetriNetUnfolderBase]: 3724/5703 cut-off events. [2024-06-03 20:02:17,524 INFO L125 PetriNetUnfolderBase]: For 350436/350436 co-relation queries the response was YES. [2024-06-03 20:02:17,568 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. [2024-06-03 20:02:17,587 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 380 selfloop transitions, 21 changer transitions 0/404 dead transitions. [2024-06-03 20:02:17,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 404 transitions, 5555 flow [2024-06-03 20:02:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:17,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-03 20:02:17,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554006968641115 [2024-06-03 20:02:17,589 INFO L175 Difference]: Start difference. First operand has 271 places, 391 transitions, 4661 flow. Second operand 7 states and 102 transitions. [2024-06-03 20:02:17,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 404 transitions, 5555 flow [2024-06-03 20:02:18,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 404 transitions, 5461 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 20:02:18,220 INFO L231 Difference]: Finished difference. Result has 272 places, 393 transitions, 4679 flow [2024-06-03 20:02:18,221 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} [2024-06-03 20:02:18,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-03 20:02:18,221 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 393 transitions, 4679 flow [2024-06-03 20:02:18,221 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) [2024-06-03 20:02:18,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:18,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:18,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:02:18,222 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)] === [2024-06-03 20:02:18,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:18,222 INFO L85 PathProgramCache]: Analyzing trace with hash 888492865, now seen corresponding path program 1 times [2024-06-03 20:02:18,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:18,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981209119] [2024-06-03 20:02:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:18,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:19,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:19,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981209119] [2024-06-03 20:02:19,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981209119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:19,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:19,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:02:19,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625198905] [2024-06-03 20:02:19,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:19,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:02:19,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:19,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:02:19,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:02:19,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:19,919 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) [2024-06-03 20:02:19,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:19,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:19,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:21,300 INFO L124 PetriNetUnfolderBase]: 3765/5769 cut-off events. [2024-06-03 20:02:21,301 INFO L125 PetriNetUnfolderBase]: For 366147/366155 co-relation queries the response was YES. [2024-06-03 20:02:21,351 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. [2024-06-03 20:02:21,374 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 398 selfloop transitions, 34 changer transitions 0/435 dead transitions. [2024-06-03 20:02:21,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 435 transitions, 5737 flow [2024-06-03 20:02:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:02:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:02:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-03 20:02:21,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853658536585366 [2024-06-03 20:02:21,376 INFO L175 Difference]: Start difference. First operand has 272 places, 393 transitions, 4679 flow. Second operand 10 states and 158 transitions. [2024-06-03 20:02:21,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 435 transitions, 5737 flow [2024-06-03 20:02:22,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 435 transitions, 5645 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 20:02:22,019 INFO L231 Difference]: Finished difference. Result has 278 places, 396 transitions, 4738 flow [2024-06-03 20:02:22,019 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} [2024-06-03 20:02:22,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-03 20:02:22,020 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 396 transitions, 4738 flow [2024-06-03 20:02:22,020 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) [2024-06-03 20:02:22,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:22,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:22,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:02:22,020 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)] === [2024-06-03 20:02:22,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:22,021 INFO L85 PathProgramCache]: Analyzing trace with hash -291200205, now seen corresponding path program 2 times [2024-06-03 20:02:22,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:22,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325724045] [2024-06-03 20:02:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:22,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:24,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:24,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325724045] [2024-06-03 20:02:24,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325724045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:24,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:24,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:02:24,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722651192] [2024-06-03 20:02:24,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:24,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:02:24,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:24,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:02:24,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:02:24,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:24,458 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) [2024-06-03 20:02:24,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:24,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:24,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:25,914 INFO L124 PetriNetUnfolderBase]: 3806/5840 cut-off events. [2024-06-03 20:02:25,915 INFO L125 PetriNetUnfolderBase]: For 367987/367995 co-relation queries the response was YES. [2024-06-03 20:02:25,961 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. [2024-06-03 20:02:25,982 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 391 selfloop transitions, 44 changer transitions 0/438 dead transitions. [2024-06-03 20:02:25,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 438 transitions, 5808 flow [2024-06-03 20:02:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:02:25,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:02:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-03 20:02:25,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878048780487805 [2024-06-03 20:02:25,984 INFO L175 Difference]: Start difference. First operand has 278 places, 396 transitions, 4738 flow. Second operand 10 states and 159 transitions. [2024-06-03 20:02:25,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 438 transitions, 5808 flow [2024-06-03 20:02:26,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 438 transitions, 5692 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 20:02:26,595 INFO L231 Difference]: Finished difference. Result has 282 places, 399 transitions, 4797 flow [2024-06-03 20:02:26,595 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} [2024-06-03 20:02:26,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-03 20:02:26,596 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 399 transitions, 4797 flow [2024-06-03 20:02:26,596 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) [2024-06-03 20:02:26,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:26,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:26,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:02:26,596 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)] === [2024-06-03 20:02:26,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:26,597 INFO L85 PathProgramCache]: Analyzing trace with hash -287625285, now seen corresponding path program 3 times [2024-06-03 20:02:26,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:26,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33042848] [2024-06-03 20:02:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:26,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:28,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:28,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33042848] [2024-06-03 20:02:28,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33042848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:28,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:28,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:02:28,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390979876] [2024-06-03 20:02:28,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:28,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:02:28,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:28,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:02:28,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:02:28,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:28,425 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) [2024-06-03 20:02:28,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:28,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:28,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:29,838 INFO L124 PetriNetUnfolderBase]: 3864/5938 cut-off events. [2024-06-03 20:02:29,838 INFO L125 PetriNetUnfolderBase]: For 384997/385005 co-relation queries the response was YES. [2024-06-03 20:02:29,890 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. [2024-06-03 20:02:29,913 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 376 selfloop transitions, 63 changer transitions 0/442 dead transitions. [2024-06-03 20:02:29,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 442 transitions, 5885 flow [2024-06-03 20:02:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:02:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:02:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-03 20:02:29,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-03 20:02:29,915 INFO L175 Difference]: Start difference. First operand has 282 places, 399 transitions, 4797 flow. Second operand 10 states and 162 transitions. [2024-06-03 20:02:29,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 442 transitions, 5885 flow [2024-06-03 20:02:30,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 442 transitions, 5745 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-03 20:02:30,661 INFO L231 Difference]: Finished difference. Result has 286 places, 403 transitions, 4886 flow [2024-06-03 20:02:30,661 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} [2024-06-03 20:02:30,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-03 20:02:30,662 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 403 transitions, 4886 flow [2024-06-03 20:02:30,662 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) [2024-06-03 20:02:30,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:30,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:30,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:02:30,662 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)] === [2024-06-03 20:02:30,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:30,663 INFO L85 PathProgramCache]: Analyzing trace with hash -287475338, now seen corresponding path program 1 times [2024-06-03 20:02:30,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:30,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680305461] [2024-06-03 20:02:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:30,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:32,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:32,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680305461] [2024-06-03 20:02:32,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680305461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:32,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:32,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:02:32,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616907984] [2024-06-03 20:02:32,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:32,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:02:32,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:32,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:02:32,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:02:32,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:32,392 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) [2024-06-03 20:02:32,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:32,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:32,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:33,749 INFO L124 PetriNetUnfolderBase]: 3897/5997 cut-off events. [2024-06-03 20:02:33,749 INFO L125 PetriNetUnfolderBase]: For 399288/399296 co-relation queries the response was YES. [2024-06-03 20:02:33,804 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. [2024-06-03 20:02:33,829 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 367 selfloop transitions, 75 changer transitions 0/445 dead transitions. [2024-06-03 20:02:33,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 445 transitions, 5990 flow [2024-06-03 20:02:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:02:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:02:33,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-03 20:02:33,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 20:02:33,831 INFO L175 Difference]: Start difference. First operand has 286 places, 403 transitions, 4886 flow. Second operand 10 states and 164 transitions. [2024-06-03 20:02:33,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 445 transitions, 5990 flow [2024-06-03 20:02:34,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 445 transitions, 5808 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-03 20:02:34,627 INFO L231 Difference]: Finished difference. Result has 289 places, 404 transitions, 4930 flow [2024-06-03 20:02:34,628 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} [2024-06-03 20:02:34,628 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-03 20:02:34,628 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 404 transitions, 4930 flow [2024-06-03 20:02:34,628 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) [2024-06-03 20:02:34,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:34,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:34,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:02:34,629 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)] === [2024-06-03 20:02:34,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:34,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1197847869, now seen corresponding path program 4 times [2024-06-03 20:02:34,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:34,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800899526] [2024-06-03 20:02:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:34,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:36,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:36,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800899526] [2024-06-03 20:02:36,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800899526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:36,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:36,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:02:36,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994799335] [2024-06-03 20:02:36,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:36,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:02:36,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:36,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:02:36,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:02:36,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:36,546 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) [2024-06-03 20:02:36,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:36,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:36,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:38,077 INFO L124 PetriNetUnfolderBase]: 3938/6068 cut-off events. [2024-06-03 20:02:38,077 INFO L125 PetriNetUnfolderBase]: For 403530/403538 co-relation queries the response was YES. [2024-06-03 20:02:38,125 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. [2024-06-03 20:02:38,146 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 378 selfloop transitions, 64 changer transitions 0/445 dead transitions. [2024-06-03 20:02:38,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 445 transitions, 6011 flow [2024-06-03 20:02:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:02:38,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:02:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-03 20:02:38,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926829268292683 [2024-06-03 20:02:38,148 INFO L175 Difference]: Start difference. First operand has 289 places, 404 transitions, 4930 flow. Second operand 10 states and 161 transitions. [2024-06-03 20:02:38,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 445 transitions, 6011 flow [2024-06-03 20:02:38,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 445 transitions, 5835 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-03 20:02:38,766 INFO L231 Difference]: Finished difference. Result has 292 places, 406 transitions, 4965 flow [2024-06-03 20:02:38,766 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} [2024-06-03 20:02:38,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-03 20:02:38,767 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 406 transitions, 4965 flow [2024-06-03 20:02:38,767 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) [2024-06-03 20:02:38,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:38,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:38,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:02:38,767 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)] === [2024-06-03 20:02:38,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:38,768 INFO L85 PathProgramCache]: Analyzing trace with hash -617316982, now seen corresponding path program 1 times [2024-06-03 20:02:38,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:38,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506296746] [2024-06-03 20:02:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:38,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:39,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:39,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506296746] [2024-06-03 20:02:39,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506296746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:39,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:39,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:39,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357855512] [2024-06-03 20:02:39,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:39,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:39,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:39,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:39,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:39,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:39,602 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) [2024-06-03 20:02:39,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:39,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:39,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:41,023 INFO L124 PetriNetUnfolderBase]: 3995/6150 cut-off events. [2024-06-03 20:02:41,023 INFO L125 PetriNetUnfolderBase]: For 414775/414787 co-relation queries the response was YES. [2024-06-03 20:02:41,073 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. [2024-06-03 20:02:41,094 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 382 selfloop transitions, 59 changer transitions 0/444 dead transitions. [2024-06-03 20:02:41,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 444 transitions, 6266 flow [2024-06-03 20:02:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:02:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:02:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 20:02:41,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:02:41,095 INFO L175 Difference]: Start difference. First operand has 292 places, 406 transitions, 4965 flow. Second operand 9 states and 144 transitions. [2024-06-03 20:02:41,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 444 transitions, 6266 flow [2024-06-03 20:02:41,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 444 transitions, 6096 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 20:02:41,853 INFO L231 Difference]: Finished difference. Result has 295 places, 417 transitions, 5130 flow [2024-06-03 20:02:41,853 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} [2024-06-03 20:02:41,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-03 20:02:41,853 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 417 transitions, 5130 flow [2024-06-03 20:02:41,854 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) [2024-06-03 20:02:41,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:41,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:41,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:02:41,854 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)] === [2024-06-03 20:02:41,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:41,854 INFO L85 PathProgramCache]: Analyzing trace with hash -305888812, now seen corresponding path program 2 times [2024-06-03 20:02:41,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:41,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926036916] [2024-06-03 20:02:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:41,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:42,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:42,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926036916] [2024-06-03 20:02:42,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926036916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:42,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:42,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503992599] [2024-06-03 20:02:42,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:42,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:42,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:42,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:42,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:42,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:42,648 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) [2024-06-03 20:02:42,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:42,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:42,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:44,065 INFO L124 PetriNetUnfolderBase]: 4015/6178 cut-off events. [2024-06-03 20:02:44,065 INFO L125 PetriNetUnfolderBase]: For 426645/426657 co-relation queries the response was YES. [2024-06-03 20:02:44,114 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. [2024-06-03 20:02:44,135 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 388 selfloop transitions, 52 changer transitions 0/443 dead transitions. [2024-06-03 20:02:44,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 443 transitions, 6200 flow [2024-06-03 20:02:44,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:02:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:02:44,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-03 20:02:44,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-03 20:02:44,137 INFO L175 Difference]: Start difference. First operand has 295 places, 417 transitions, 5130 flow. Second operand 9 states and 137 transitions. [2024-06-03 20:02:44,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 443 transitions, 6200 flow [2024-06-03 20:02:45,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 443 transitions, 6040 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-03 20:02:45,012 INFO L231 Difference]: Finished difference. Result has 301 places, 422 transitions, 5192 flow [2024-06-03 20:02:45,012 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} [2024-06-03 20:02:45,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-03 20:02:45,013 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 422 transitions, 5192 flow [2024-06-03 20:02:45,013 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) [2024-06-03 20:02:45,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:45,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:45,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:02:45,013 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)] === [2024-06-03 20:02:45,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:45,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1716810270, now seen corresponding path program 1 times [2024-06-03 20:02:45,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:45,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954154199] [2024-06-03 20:02:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:45,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:46,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:46,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954154199] [2024-06-03 20:02:46,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954154199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:46,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:46,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:46,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721449562] [2024-06-03 20:02:46,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:46,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:46,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:46,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:46,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:46,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:46,182 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) [2024-06-03 20:02:46,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:46,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:46,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:47,536 INFO L124 PetriNetUnfolderBase]: 4041/6211 cut-off events. [2024-06-03 20:02:47,536 INFO L125 PetriNetUnfolderBase]: For 435740/435748 co-relation queries the response was YES. [2024-06-03 20:02:47,590 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. [2024-06-03 20:02:47,614 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 65 changer transitions 0/449 dead transitions. [2024-06-03 20:02:47,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 449 transitions, 6457 flow [2024-06-03 20:02:47,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:02:47,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:02:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:02:47,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:02:47,616 INFO L175 Difference]: Start difference. First operand has 301 places, 422 transitions, 5192 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:02:47,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 449 transitions, 6457 flow [2024-06-03 20:02:48,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 449 transitions, 6299 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 20:02:48,522 INFO L231 Difference]: Finished difference. Result has 304 places, 429 transitions, 5374 flow [2024-06-03 20:02:48,523 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} [2024-06-03 20:02:48,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-03 20:02:48,523 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 429 transitions, 5374 flow [2024-06-03 20:02:48,523 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) [2024-06-03 20:02:48,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:48,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:48,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:02:48,524 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:48,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:48,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1987037686, now seen corresponding path program 3 times [2024-06-03 20:02:48,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:48,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096995232] [2024-06-03 20:02:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:48,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:49,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:49,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096995232] [2024-06-03 20:02:49,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096995232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:49,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:49,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:49,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189258486] [2024-06-03 20:02:49,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:49,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:49,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:49,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:49,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:49,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:49,373 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) [2024-06-03 20:02:49,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:49,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:49,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:50,759 INFO L124 PetriNetUnfolderBase]: 4147/6365 cut-off events. [2024-06-03 20:02:50,760 INFO L125 PetriNetUnfolderBase]: For 476416/476420 co-relation queries the response was YES. [2024-06-03 20:02:50,818 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. [2024-06-03 20:02:50,844 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 91 changer transitions 0/468 dead transitions. [2024-06-03 20:02:50,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 468 transitions, 7004 flow [2024-06-03 20:02:50,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:02:50,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:02:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 20:02:50,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:02:50,846 INFO L175 Difference]: Start difference. First operand has 304 places, 429 transitions, 5374 flow. Second operand 8 states and 136 transitions. [2024-06-03 20:02:50,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 468 transitions, 7004 flow [2024-06-03 20:02:52,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 468 transitions, 6848 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-03 20:02:52,036 INFO L231 Difference]: Finished difference. Result has 308 places, 442 transitions, 5814 flow [2024-06-03 20:02:52,036 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} [2024-06-03 20:02:52,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-03 20:02:52,037 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 442 transitions, 5814 flow [2024-06-03 20:02:52,037 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) [2024-06-03 20:02:52,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:52,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:52,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:02:52,037 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)] === [2024-06-03 20:02:52,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:52,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1987026526, now seen corresponding path program 4 times [2024-06-03 20:02:52,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:52,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300132174] [2024-06-03 20:02:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:52,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:52,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:52,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300132174] [2024-06-03 20:02:52,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300132174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:52,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:52,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:52,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317517804] [2024-06-03 20:02:52,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:52,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:52,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:52,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:52,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:52,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:52,853 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) [2024-06-03 20:02:52,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:52,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:52,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:54,282 INFO L124 PetriNetUnfolderBase]: 4183/6415 cut-off events. [2024-06-03 20:02:54,283 INFO L125 PetriNetUnfolderBase]: For 488921/488925 co-relation queries the response was YES. [2024-06-03 20:02:54,342 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. [2024-06-03 20:02:54,367 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 368 selfloop transitions, 100 changer transitions 0/471 dead transitions. [2024-06-03 20:02:54,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 471 transitions, 7320 flow [2024-06-03 20:02:54,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:02:54,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:02:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 20:02:54,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-03 20:02:54,369 INFO L175 Difference]: Start difference. First operand has 308 places, 442 transitions, 5814 flow. Second operand 8 states and 134 transitions. [2024-06-03 20:02:54,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 471 transitions, 7320 flow [2024-06-03 20:02:55,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 471 transitions, 7123 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-03 20:02:55,450 INFO L231 Difference]: Finished difference. Result has 313 places, 448 transitions, 6021 flow [2024-06-03 20:02:55,451 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} [2024-06-03 20:02:55,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-03 20:02:55,451 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 448 transitions, 6021 flow [2024-06-03 20:02:55,451 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) [2024-06-03 20:02:55,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:55,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:55,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:02:55,452 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)] === [2024-06-03 20:02:55,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:55,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1987026340, now seen corresponding path program 2 times [2024-06-03 20:02:55,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:55,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465502109] [2024-06-03 20:02:55,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:55,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:56,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:56,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465502109] [2024-06-03 20:02:56,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465502109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:56,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:56,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:56,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232780939] [2024-06-03 20:02:56,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:56,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:56,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:56,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:56,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:56,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:56,513 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) [2024-06-03 20:02:56,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:56,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:56,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:57,895 INFO L124 PetriNetUnfolderBase]: 4193/6423 cut-off events. [2024-06-03 20:02:57,896 INFO L125 PetriNetUnfolderBase]: For 489389/489397 co-relation queries the response was YES. [2024-06-03 20:02:57,961 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. [2024-06-03 20:02:57,989 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 414 selfloop transitions, 50 changer transitions 0/467 dead transitions. [2024-06-03 20:02:57,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 467 transitions, 7080 flow [2024-06-03 20:02:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:02:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:02:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 20:02:57,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 20:02:57,990 INFO L175 Difference]: Start difference. First operand has 313 places, 448 transitions, 6021 flow. Second operand 8 states and 123 transitions. [2024-06-03 20:02:57,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 467 transitions, 7080 flow [2024-06-03 20:02:59,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 467 transitions, 6904 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-03 20:02:59,011 INFO L231 Difference]: Finished difference. Result has 317 places, 451 transitions, 6026 flow [2024-06-03 20:02:59,012 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} [2024-06-03 20:02:59,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-03 20:02:59,012 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 451 transitions, 6026 flow [2024-06-03 20:02:59,012 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) [2024-06-03 20:02:59,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:59,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:59,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:02:59,013 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)] === [2024-06-03 20:02:59,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:59,013 INFO L85 PathProgramCache]: Analyzing trace with hash 384972475, now seen corresponding path program 1 times [2024-06-03 20:02:59,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:59,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101510813] [2024-06-03 20:02:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:59,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:59,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:59,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101510813] [2024-06-03 20:02:59,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101510813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:59,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:59,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:59,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282585482] [2024-06-03 20:02:59,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:59,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:59,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:59,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:59,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:59,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:59,900 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) [2024-06-03 20:02:59,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:59,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:59,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:01,231 INFO L124 PetriNetUnfolderBase]: 4190/6419 cut-off events. [2024-06-03 20:03:01,231 INFO L125 PetriNetUnfolderBase]: For 496653/496661 co-relation queries the response was YES. [2024-06-03 20:03:01,294 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. [2024-06-03 20:03:01,323 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 423 selfloop transitions, 36 changer transitions 0/462 dead transitions. [2024-06-03 20:03:01,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 462 transitions, 7046 flow [2024-06-03 20:03:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:03:01,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:03:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-03 20:03:01,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-03 20:03:01,324 INFO L175 Difference]: Start difference. First operand has 317 places, 451 transitions, 6026 flow. Second operand 6 states and 94 transitions. [2024-06-03 20:03:01,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 462 transitions, 7046 flow [2024-06-03 20:03:02,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 462 transitions, 6904 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-03 20:03:02,429 INFO L231 Difference]: Finished difference. Result has 316 places, 453 transitions, 6048 flow [2024-06-03 20:03:02,429 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} [2024-06-03 20:03:02,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-03 20:03:02,430 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 453 transitions, 6048 flow [2024-06-03 20:03:02,430 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) [2024-06-03 20:03:02,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:02,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:02,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:03:02,430 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)] === [2024-06-03 20:03:02,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:02,431 INFO L85 PathProgramCache]: Analyzing trace with hash -478072420, now seen corresponding path program 5 times [2024-06-03 20:03:02,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:02,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775664580] [2024-06-03 20:03:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:02,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:03,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:03,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775664580] [2024-06-03 20:03:03,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775664580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:03,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:03,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:03,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099410616] [2024-06-03 20:03:03,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:03,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:03,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:03,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:03,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:03,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:03,186 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) [2024-06-03 20:03:03,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:03,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:03,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:04,603 INFO L124 PetriNetUnfolderBase]: 4178/6409 cut-off events. [2024-06-03 20:03:04,604 INFO L125 PetriNetUnfolderBase]: For 493950/493954 co-relation queries the response was YES. [2024-06-03 20:03:04,665 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. [2024-06-03 20:03:04,690 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 404 selfloop transitions, 62 changer transitions 0/469 dead transitions. [2024-06-03 20:03:04,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 469 transitions, 7192 flow [2024-06-03 20:03:04,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:03:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:03:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-03 20:03:04,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-03 20:03:04,692 INFO L175 Difference]: Start difference. First operand has 316 places, 453 transitions, 6048 flow. Second operand 7 states and 114 transitions. [2024-06-03 20:03:04,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 469 transitions, 7192 flow [2024-06-03 20:03:05,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 469 transitions, 7008 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-03 20:03:05,813 INFO L231 Difference]: Finished difference. Result has 318 places, 453 transitions, 5997 flow [2024-06-03 20:03:05,813 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} [2024-06-03 20:03:05,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-03 20:03:05,814 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 453 transitions, 5997 flow [2024-06-03 20:03:05,814 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) [2024-06-03 20:03:05,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:05,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:05,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:03:05,814 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)] === [2024-06-03 20:03:05,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:05,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1711096350, now seen corresponding path program 3 times [2024-06-03 20:03:05,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:05,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068463442] [2024-06-03 20:03:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:05,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:06,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:06,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068463442] [2024-06-03 20:03:06,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068463442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:06,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:06,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:06,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643922407] [2024-06-03 20:03:06,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:06,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:06,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:06,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:06,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:06,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:06,847 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) [2024-06-03 20:03:06,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:06,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:06,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:08,244 INFO L124 PetriNetUnfolderBase]: 4172/6395 cut-off events. [2024-06-03 20:03:08,244 INFO L125 PetriNetUnfolderBase]: For 483744/483752 co-relation queries the response was YES. [2024-06-03 20:03:08,305 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. [2024-06-03 20:03:08,330 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 32 changer transitions 0/464 dead transitions. [2024-06-03 20:03:08,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 464 transitions, 6963 flow [2024-06-03 20:03:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:03:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:03:08,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-03 20:03:08,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693379790940767 [2024-06-03 20:03:08,332 INFO L175 Difference]: Start difference. First operand has 318 places, 453 transitions, 5997 flow. Second operand 7 states and 106 transitions. [2024-06-03 20:03:08,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 464 transitions, 6963 flow [2024-06-03 20:03:09,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 464 transitions, 6823 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 20:03:09,416 INFO L231 Difference]: Finished difference. Result has 321 places, 453 transitions, 5931 flow [2024-06-03 20:03:09,417 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} [2024-06-03 20:03:09,417 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-03 20:03:09,417 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 453 transitions, 5931 flow [2024-06-03 20:03:09,417 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) [2024-06-03 20:03:09,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:09,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:09,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:03:09,418 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)] === [2024-06-03 20:03:09,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:09,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1780493056, now seen corresponding path program 6 times [2024-06-03 20:03:09,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:09,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245982802] [2024-06-03 20:03:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:09,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:10,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:10,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245982802] [2024-06-03 20:03:10,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245982802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:10,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:10,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:10,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232005064] [2024-06-03 20:03:10,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:10,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:10,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:10,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:10,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:10,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:10,216 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) [2024-06-03 20:03:10,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:10,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:10,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:11,626 INFO L124 PetriNetUnfolderBase]: 4160/6385 cut-off events. [2024-06-03 20:03:11,627 INFO L125 PetriNetUnfolderBase]: For 490944/490948 co-relation queries the response was YES. [2024-06-03 20:03:11,687 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. [2024-06-03 20:03:11,712 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 418 selfloop transitions, 45 changer transitions 0/466 dead transitions. [2024-06-03 20:03:11,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 466 transitions, 6913 flow [2024-06-03 20:03:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:03:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:03:11,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-03 20:03:11,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-03 20:03:11,714 INFO L175 Difference]: Start difference. First operand has 321 places, 453 transitions, 5931 flow. Second operand 7 states and 110 transitions. [2024-06-03 20:03:11,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 466 transitions, 6913 flow [2024-06-03 20:03:12,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 466 transitions, 6797 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 20:03:12,851 INFO L231 Difference]: Finished difference. Result has 323 places, 453 transitions, 5911 flow [2024-06-03 20:03:12,851 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} [2024-06-03 20:03:12,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-03 20:03:12,852 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 453 transitions, 5911 flow [2024-06-03 20:03:12,852 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) [2024-06-03 20:03:12,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:12,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:12,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:03:12,852 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)] === [2024-06-03 20:03:12,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:12,853 INFO L85 PathProgramCache]: Analyzing trace with hash -115029353, now seen corresponding path program 5 times [2024-06-03 20:03:12,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:12,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651316654] [2024-06-03 20:03:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:12,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:14,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:14,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651316654] [2024-06-03 20:03:14,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651316654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:14,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:14,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:03:14,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515929785] [2024-06-03 20:03:14,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:14,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:03:14,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:14,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:03:14,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:03:14,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:14,889 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) [2024-06-03 20:03:14,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:14,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:14,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:16,545 INFO L124 PetriNetUnfolderBase]: 4201/6450 cut-off events. [2024-06-03 20:03:16,545 INFO L125 PetriNetUnfolderBase]: For 515455/515463 co-relation queries the response was YES. [2024-06-03 20:03:16,604 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. [2024-06-03 20:03:16,629 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 110 changer transitions 0/493 dead transitions. [2024-06-03 20:03:16,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 493 transitions, 7131 flow [2024-06-03 20:03:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:03:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:03:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-03 20:03:16,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:03:16,631 INFO L175 Difference]: Start difference. First operand has 323 places, 453 transitions, 5911 flow. Second operand 10 states and 160 transitions. [2024-06-03 20:03:16,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 493 transitions, 7131 flow [2024-06-03 20:03:17,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 493 transitions, 7019 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:03:17,474 INFO L231 Difference]: Finished difference. Result has 328 places, 457 transitions, 6177 flow [2024-06-03 20:03:17,475 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} [2024-06-03 20:03:17,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-03 20:03:17,475 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 457 transitions, 6177 flow [2024-06-03 20:03:17,475 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) [2024-06-03 20:03:17,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:17,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:17,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:03:17,477 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)] === [2024-06-03 20:03:17,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:17,479 INFO L85 PathProgramCache]: Analyzing trace with hash 84416587, now seen corresponding path program 6 times [2024-06-03 20:03:17,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:17,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125645059] [2024-06-03 20:03:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:17,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:19,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:19,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125645059] [2024-06-03 20:03:19,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125645059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:19,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:19,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:03:19,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36426093] [2024-06-03 20:03:19,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:19,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:03:19,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:19,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:03:19,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:03:19,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:19,332 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) [2024-06-03 20:03:19,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:19,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:19,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:20,871 INFO L124 PetriNetUnfolderBase]: 4181/6418 cut-off events. [2024-06-03 20:03:20,871 INFO L125 PetriNetUnfolderBase]: For 512277/512285 co-relation queries the response was YES. [2024-06-03 20:03:20,933 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. [2024-06-03 20:03:20,958 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 365 selfloop transitions, 131 changer transitions 0/499 dead transitions. [2024-06-03 20:03:20,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 499 transitions, 7379 flow [2024-06-03 20:03:20,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:03:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:03:20,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-03 20:03:20,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-03 20:03:20,960 INFO L175 Difference]: Start difference. First operand has 328 places, 457 transitions, 6177 flow. Second operand 10 states and 168 transitions. [2024-06-03 20:03:20,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 499 transitions, 7379 flow [2024-06-03 20:03:22,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 499 transitions, 6985 flow, removed 128 selfloop flow, removed 5 redundant places. [2024-06-03 20:03:22,080 INFO L231 Difference]: Finished difference. Result has 333 places, 457 transitions, 6052 flow [2024-06-03 20:03:22,081 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} [2024-06-03 20:03:22,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-03 20:03:22,081 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 457 transitions, 6052 flow [2024-06-03 20:03:22,081 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) [2024-06-03 20:03:22,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:22,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:22,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:03:22,082 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)] === [2024-06-03 20:03:22,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:22,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1569707325, now seen corresponding path program 7 times [2024-06-03 20:03:22,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:22,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822816451] [2024-06-03 20:03:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:22,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:23,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:23,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822816451] [2024-06-03 20:03:23,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822816451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:23,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:23,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:03:23,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619477549] [2024-06-03 20:03:23,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:23,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:03:23,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:23,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:03:23,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:03:23,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:23,866 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) [2024-06-03 20:03:23,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:23,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:23,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:25,500 INFO L124 PetriNetUnfolderBase]: 4239/6522 cut-off events. [2024-06-03 20:03:25,500 INFO L125 PetriNetUnfolderBase]: For 521148/521152 co-relation queries the response was YES. [2024-06-03 20:03:25,554 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. [2024-06-03 20:03:25,576 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 433 selfloop transitions, 62 changer transitions 0/498 dead transitions. [2024-06-03 20:03:25,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 498 transitions, 7252 flow [2024-06-03 20:03:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:03:25,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:03:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-03 20:03:25,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-03 20:03:25,578 INFO L175 Difference]: Start difference. First operand has 333 places, 457 transitions, 6052 flow. Second operand 10 states and 162 transitions. [2024-06-03 20:03:25,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 498 transitions, 7252 flow [2024-06-03 20:03:26,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 498 transitions, 6881 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-03 20:03:26,543 INFO L231 Difference]: Finished difference. Result has 335 places, 460 transitions, 5894 flow [2024-06-03 20:03:26,544 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} [2024-06-03 20:03:26,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-03 20:03:26,544 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 460 transitions, 5894 flow [2024-06-03 20:03:26,544 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) [2024-06-03 20:03:26,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:26,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:26,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:03:26,545 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)] === [2024-06-03 20:03:26,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:26,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1569563175, now seen corresponding path program 8 times [2024-06-03 20:03:26,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:26,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809272083] [2024-06-03 20:03:26,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:26,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:28,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:28,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809272083] [2024-06-03 20:03:28,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809272083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:28,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:28,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:03:28,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169166268] [2024-06-03 20:03:28,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:28,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:03:28,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:28,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:03:28,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:03:28,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:28,173 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) [2024-06-03 20:03:28,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:28,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:28,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:29,784 INFO L124 PetriNetUnfolderBase]: 4280/6593 cut-off events. [2024-06-03 20:03:29,784 INFO L125 PetriNetUnfolderBase]: For 498549/498553 co-relation queries the response was YES. [2024-06-03 20:03:29,849 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. [2024-06-03 20:03:29,875 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 433 selfloop transitions, 65 changer transitions 0/501 dead transitions. [2024-06-03 20:03:29,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 501 transitions, 7116 flow [2024-06-03 20:03:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:03:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:03:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-03 20:03:29,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975609756097561 [2024-06-03 20:03:29,877 INFO L175 Difference]: Start difference. First operand has 335 places, 460 transitions, 5894 flow. Second operand 10 states and 163 transitions. [2024-06-03 20:03:29,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 501 transitions, 7116 flow [2024-06-03 20:03:30,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 501 transitions, 6945 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 20:03:30,909 INFO L231 Difference]: Finished difference. Result has 339 places, 463 transitions, 5963 flow [2024-06-03 20:03:30,909 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} [2024-06-03 20:03:30,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-03 20:03:30,909 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 463 transitions, 5963 flow [2024-06-03 20:03:30,910 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) [2024-06-03 20:03:30,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:30,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:30,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:03:30,910 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)] === [2024-06-03 20:03:30,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:30,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1115412307, now seen corresponding path program 9 times [2024-06-03 20:03:30,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:30,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102772319] [2024-06-03 20:03:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:30,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:32,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:32,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102772319] [2024-06-03 20:03:32,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102772319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:32,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:32,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:03:32,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351644916] [2024-06-03 20:03:32,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:32,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:03:32,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:32,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:03:32,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:03:32,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:32,708 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) [2024-06-03 20:03:32,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:32,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:32,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:34,373 INFO L124 PetriNetUnfolderBase]: 4260/6561 cut-off events. [2024-06-03 20:03:34,373 INFO L125 PetriNetUnfolderBase]: For 487393/487397 co-relation queries the response was YES. [2024-06-03 20:03:34,429 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. [2024-06-03 20:03:34,452 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 439 selfloop transitions, 60 changer transitions 0/502 dead transitions. [2024-06-03 20:03:34,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 502 transitions, 7037 flow [2024-06-03 20:03:34,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:03:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:03:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-03 20:03:34,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878048780487805 [2024-06-03 20:03:34,453 INFO L175 Difference]: Start difference. First operand has 339 places, 463 transitions, 5963 flow. Second operand 10 states and 159 transitions. [2024-06-03 20:03:34,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 502 transitions, 7037 flow [2024-06-03 20:03:35,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 502 transitions, 6833 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-03 20:03:35,617 INFO L231 Difference]: Finished difference. Result has 342 places, 464 transitions, 5836 flow [2024-06-03 20:03:35,617 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} [2024-06-03 20:03:35,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-03 20:03:35,618 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 464 transitions, 5836 flow [2024-06-03 20:03:35,618 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) [2024-06-03 20:03:35,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:35,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:35,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:03:35,618 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)] === [2024-06-03 20:03:35,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:35,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1773895484, now seen corresponding path program 1 times [2024-06-03 20:03:35,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:35,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337749238] [2024-06-03 20:03:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:35,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:36,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:36,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337749238] [2024-06-03 20:03:36,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337749238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:36,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:36,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:03:36,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771807020] [2024-06-03 20:03:36,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:36,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:03:36,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:36,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:03:36,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:03:36,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:36,713 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) [2024-06-03 20:03:36,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:36,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:36,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:38,515 INFO L124 PetriNetUnfolderBase]: 4433/6816 cut-off events. [2024-06-03 20:03:38,515 INFO L125 PetriNetUnfolderBase]: For 528753/528755 co-relation queries the response was YES. [2024-06-03 20:03:38,581 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. [2024-06-03 20:03:38,607 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 477 selfloop transitions, 45 changer transitions 0/525 dead transitions. [2024-06-03 20:03:38,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 525 transitions, 7499 flow [2024-06-03 20:03:38,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:03:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:03:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-03 20:03:38,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376940133037694 [2024-06-03 20:03:38,609 INFO L175 Difference]: Start difference. First operand has 342 places, 464 transitions, 5836 flow. Second operand 11 states and 170 transitions. [2024-06-03 20:03:38,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 525 transitions, 7499 flow [2024-06-03 20:03:39,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 525 transitions, 7227 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-03 20:03:39,975 INFO L231 Difference]: Finished difference. Result has 348 places, 482 transitions, 5941 flow [2024-06-03 20:03:39,975 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} [2024-06-03 20:03:39,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-03 20:03:39,976 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 482 transitions, 5941 flow [2024-06-03 20:03:39,976 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) [2024-06-03 20:03:39,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:39,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:39,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:03:39,976 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)] === [2024-06-03 20:03:39,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:39,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1859829526, now seen corresponding path program 2 times [2024-06-03 20:03:39,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:39,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354789532] [2024-06-03 20:03:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:39,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:40,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:40,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354789532] [2024-06-03 20:03:40,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354789532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:40,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:40,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:03:40,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60741756] [2024-06-03 20:03:40,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:40,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:03:40,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:40,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:03:40,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:03:41,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:41,061 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) [2024-06-03 20:03:41,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:41,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:41,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:42,919 INFO L124 PetriNetUnfolderBase]: 4521/6950 cut-off events. [2024-06-03 20:03:42,919 INFO L125 PetriNetUnfolderBase]: For 582766/582774 co-relation queries the response was YES. [2024-06-03 20:03:42,990 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. [2024-06-03 20:03:43,017 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 447 selfloop transitions, 60 changer transitions 0/510 dead transitions. [2024-06-03 20:03:43,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 510 transitions, 7164 flow [2024-06-03 20:03:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:03:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:03:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-03 20:03:43,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-03 20:03:43,027 INFO L175 Difference]: Start difference. First operand has 348 places, 482 transitions, 5941 flow. Second operand 9 states and 139 transitions. [2024-06-03 20:03:43,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 510 transitions, 7164 flow [2024-06-03 20:03:44,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 510 transitions, 7110 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:03:44,421 INFO L231 Difference]: Finished difference. Result has 352 places, 484 transitions, 6072 flow [2024-06-03 20:03:44,421 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} [2024-06-03 20:03:44,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-03 20:03:44,421 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 484 transitions, 6072 flow [2024-06-03 20:03:44,422 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) [2024-06-03 20:03:44,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:44,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:44,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:03:44,422 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)] === [2024-06-03 20:03:44,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:44,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1780096318, now seen corresponding path program 1 times [2024-06-03 20:03:44,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:44,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636226918] [2024-06-03 20:03:44,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:44,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:45,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:45,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636226918] [2024-06-03 20:03:45,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636226918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:45,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:45,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:45,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255510880] [2024-06-03 20:03:45,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:45,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:45,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:45,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:45,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:45,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:45,327 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) [2024-06-03 20:03:45,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:45,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:45,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:46,948 INFO L124 PetriNetUnfolderBase]: 4621/7108 cut-off events. [2024-06-03 20:03:46,949 INFO L125 PetriNetUnfolderBase]: For 590211/590217 co-relation queries the response was YES. [2024-06-03 20:03:47,023 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. [2024-06-03 20:03:47,054 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 446 selfloop transitions, 59 changer transitions 0/508 dead transitions. [2024-06-03 20:03:47,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 508 transitions, 7446 flow [2024-06-03 20:03:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:03:47,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:03:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-03 20:03:47,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-03 20:03:47,055 INFO L175 Difference]: Start difference. First operand has 352 places, 484 transitions, 6072 flow. Second operand 7 states and 115 transitions. [2024-06-03 20:03:47,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 508 transitions, 7446 flow [2024-06-03 20:03:48,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 508 transitions, 7308 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:03:48,520 INFO L231 Difference]: Finished difference. Result has 352 places, 486 transitions, 6114 flow [2024-06-03 20:03:48,521 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} [2024-06-03 20:03:48,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-03 20:03:48,521 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 486 transitions, 6114 flow [2024-06-03 20:03:48,521 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) [2024-06-03 20:03:48,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:48,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:48,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:03:48,522 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)] === [2024-06-03 20:03:48,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:48,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1780109338, now seen corresponding path program 2 times [2024-06-03 20:03:48,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:48,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666509638] [2024-06-03 20:03:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:48,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:49,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:49,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666509638] [2024-06-03 20:03:49,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666509638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:49,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:49,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:49,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191112533] [2024-06-03 20:03:49,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:49,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:49,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:49,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:49,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:49,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:49,458 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) [2024-06-03 20:03:49,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:49,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:49,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:51,039 INFO L124 PetriNetUnfolderBase]: 4565/7028 cut-off events. [2024-06-03 20:03:51,039 INFO L125 PetriNetUnfolderBase]: For 579916/579922 co-relation queries the response was YES. [2024-06-03 20:03:51,112 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. [2024-06-03 20:03:51,140 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 446 selfloop transitions, 56 changer transitions 0/505 dead transitions. [2024-06-03 20:03:51,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 505 transitions, 7254 flow [2024-06-03 20:03:51,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:03:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:03:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-03 20:03:51,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:03:51,141 INFO L175 Difference]: Start difference. First operand has 352 places, 486 transitions, 6114 flow. Second operand 7 states and 112 transitions. [2024-06-03 20:03:51,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 505 transitions, 7254 flow [2024-06-03 20:03:52,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 505 transitions, 7155 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 20:03:52,706 INFO L231 Difference]: Finished difference. Result has 356 places, 486 transitions, 6137 flow [2024-06-03 20:03:52,706 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} [2024-06-03 20:03:52,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-03 20:03:52,707 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 486 transitions, 6137 flow [2024-06-03 20:03:52,707 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) [2024-06-03 20:03:52,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:52,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:52,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:03:52,707 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)] === [2024-06-03 20:03:52,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:52,708 INFO L85 PathProgramCache]: Analyzing trace with hash 402410742, now seen corresponding path program 7 times [2024-06-03 20:03:52,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:52,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420485995] [2024-06-03 20:03:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:52,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:53,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:53,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420485995] [2024-06-03 20:03:53,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420485995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:53,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:53,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:53,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028182105] [2024-06-03 20:03:53,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:53,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:53,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:53,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:53,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:53,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:53,559 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) [2024-06-03 20:03:53,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:53,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:53,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:55,242 INFO L124 PetriNetUnfolderBase]: 4617/7100 cut-off events. [2024-06-03 20:03:55,242 INFO L125 PetriNetUnfolderBase]: For 547483/547489 co-relation queries the response was YES. [2024-06-03 20:03:55,318 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. [2024-06-03 20:03:55,347 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 458 selfloop transitions, 60 changer transitions 0/521 dead transitions. [2024-06-03 20:03:55,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 521 transitions, 7623 flow [2024-06-03 20:03:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:03:55,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:03:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-03 20:03:55,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-03 20:03:55,348 INFO L175 Difference]: Start difference. First operand has 356 places, 486 transitions, 6137 flow. Second operand 10 states and 154 transitions. [2024-06-03 20:03:55,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 521 transitions, 7623 flow [2024-06-03 20:03:56,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 521 transitions, 7490 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:03:56,994 INFO L231 Difference]: Finished difference. Result has 360 places, 492 transitions, 6316 flow [2024-06-03 20:03:56,994 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} [2024-06-03 20:03:56,995 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-03 20:03:56,995 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 492 transitions, 6316 flow [2024-06-03 20:03:56,995 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) [2024-06-03 20:03:56,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:56,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:56,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:03:56,996 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)] === [2024-06-03 20:03:56,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:56,996 INFO L85 PathProgramCache]: Analyzing trace with hash -745197628, now seen corresponding path program 4 times [2024-06-03 20:03:56,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:56,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341734607] [2024-06-03 20:03:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:56,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:58,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:58,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341734607] [2024-06-03 20:03:58,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341734607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:58,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:58,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:58,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160009277] [2024-06-03 20:03:58,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:58,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:58,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:58,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:58,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:58,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:58,106 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) [2024-06-03 20:03:58,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:58,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:58,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:59,727 INFO L124 PetriNetUnfolderBase]: 4643/7130 cut-off events. [2024-06-03 20:03:59,727 INFO L125 PetriNetUnfolderBase]: For 565060/565068 co-relation queries the response was YES. [2024-06-03 20:03:59,801 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. [2024-06-03 20:03:59,828 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 479 selfloop transitions, 41 changer transitions 0/523 dead transitions. [2024-06-03 20:03:59,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 523 transitions, 7799 flow [2024-06-03 20:03:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:03:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:03:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-03 20:03:59,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-03 20:03:59,829 INFO L175 Difference]: Start difference. First operand has 360 places, 492 transitions, 6316 flow. Second operand 9 states and 137 transitions. [2024-06-03 20:03:59,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 523 transitions, 7799 flow [2024-06-03 20:04:01,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 523 transitions, 7566 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:01,499 INFO L231 Difference]: Finished difference. Result has 364 places, 499 transitions, 6384 flow [2024-06-03 20:04:01,500 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} [2024-06-03 20:04:01,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-03 20:04:01,500 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 499 transitions, 6384 flow [2024-06-03 20:04:01,500 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) [2024-06-03 20:04:01,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:01,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:01,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:04:01,501 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)] === [2024-06-03 20:04:01,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:01,501 INFO L85 PathProgramCache]: Analyzing trace with hash 197653186, now seen corresponding path program 8 times [2024-06-03 20:04:01,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:01,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989619532] [2024-06-03 20:04:01,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:01,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:02,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:02,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989619532] [2024-06-03 20:04:02,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989619532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:02,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:02,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:02,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212534522] [2024-06-03 20:04:02,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:02,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:02,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:02,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:02,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:02,318 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) [2024-06-03 20:04:02,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:02,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:02,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:03,974 INFO L124 PetriNetUnfolderBase]: 4631/7120 cut-off events. [2024-06-03 20:04:03,974 INFO L125 PetriNetUnfolderBase]: For 571445/571451 co-relation queries the response was YES. [2024-06-03 20:04:04,053 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. [2024-06-03 20:04:04,081 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 459 selfloop transitions, 59 changer transitions 0/521 dead transitions. [2024-06-03 20:04:04,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 521 transitions, 7510 flow [2024-06-03 20:04:04,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:04,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 20:04:04,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-03 20:04:04,082 INFO L175 Difference]: Start difference. First operand has 364 places, 499 transitions, 6384 flow. Second operand 8 states and 129 transitions. [2024-06-03 20:04:04,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 521 transitions, 7510 flow [2024-06-03 20:04:05,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 521 transitions, 7279 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-03 20:04:05,664 INFO L231 Difference]: Finished difference. Result has 367 places, 499 transitions, 6277 flow [2024-06-03 20:04:05,664 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} [2024-06-03 20:04:05,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-03 20:04:05,665 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 499 transitions, 6277 flow [2024-06-03 20:04:05,665 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) [2024-06-03 20:04:05,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:05,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:05,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:04:05,665 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)] === [2024-06-03 20:04:05,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:05,666 INFO L85 PathProgramCache]: Analyzing trace with hash -745047898, now seen corresponding path program 5 times [2024-06-03 20:04:05,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:05,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477067522] [2024-06-03 20:04:05,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:05,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:06,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:06,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477067522] [2024-06-03 20:04:06,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477067522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:06,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:06,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:06,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879198013] [2024-06-03 20:04:06,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:06,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:06,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:06,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:06,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:06,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:06,714 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) [2024-06-03 20:04:06,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:06,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:06,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:08,351 INFO L124 PetriNetUnfolderBase]: 4625/7106 cut-off events. [2024-06-03 20:04:08,351 INFO L125 PetriNetUnfolderBase]: For 568327/568335 co-relation queries the response was YES. [2024-06-03 20:04:08,433 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. [2024-06-03 20:04:08,462 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 479 selfloop transitions, 35 changer transitions 0/517 dead transitions. [2024-06-03 20:04:08,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 517 transitions, 7371 flow [2024-06-03 20:04:08,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-03 20:04:08,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 20:04:08,464 INFO L175 Difference]: Start difference. First operand has 367 places, 499 transitions, 6277 flow. Second operand 8 states and 120 transitions. [2024-06-03 20:04:08,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 517 transitions, 7371 flow [2024-06-03 20:04:10,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 517 transitions, 7213 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 20:04:10,139 INFO L231 Difference]: Finished difference. Result has 368 places, 499 transitions, 6195 flow [2024-06-03 20:04:10,139 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} [2024-06-03 20:04:10,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-03 20:04:10,140 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 499 transitions, 6195 flow [2024-06-03 20:04:10,140 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) [2024-06-03 20:04:10,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:10,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:10,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:04:10,140 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)] === [2024-06-03 20:04:10,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:10,141 INFO L85 PathProgramCache]: Analyzing trace with hash -517296478, now seen corresponding path program 6 times [2024-06-03 20:04:10,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:10,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177608549] [2024-06-03 20:04:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:10,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:11,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:11,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177608549] [2024-06-03 20:04:11,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177608549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:11,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:11,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:11,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486007445] [2024-06-03 20:04:11,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:11,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:11,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:11,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:11,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:11,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:11,308 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) [2024-06-03 20:04:11,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:11,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:11,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:12,920 INFO L124 PetriNetUnfolderBase]: 4645/7134 cut-off events. [2024-06-03 20:04:12,921 INFO L125 PetriNetUnfolderBase]: For 580894/580902 co-relation queries the response was YES. [2024-06-03 20:04:13,003 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. [2024-06-03 20:04:13,032 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 460 selfloop transitions, 62 changer transitions 0/525 dead transitions. [2024-06-03 20:04:13,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 525 transitions, 7419 flow [2024-06-03 20:04:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:13,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 20:04:13,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-03 20:04:13,034 INFO L175 Difference]: Start difference. First operand has 368 places, 499 transitions, 6195 flow. Second operand 8 states and 126 transitions. [2024-06-03 20:04:13,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 525 transitions, 7419 flow [2024-06-03 20:04:14,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 525 transitions, 7349 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:14,768 INFO L231 Difference]: Finished difference. Result has 370 places, 505 transitions, 6385 flow [2024-06-03 20:04:14,768 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} [2024-06-03 20:04:14,768 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-03 20:04:14,768 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 505 transitions, 6385 flow [2024-06-03 20:04:14,769 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) [2024-06-03 20:04:14,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:14,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:14,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:04:14,769 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)] === [2024-06-03 20:04:14,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:14,769 INFO L85 PathProgramCache]: Analyzing trace with hash 409203648, now seen corresponding path program 7 times [2024-06-03 20:04:14,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:14,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779530013] [2024-06-03 20:04:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:14,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:15,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:15,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779530013] [2024-06-03 20:04:15,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779530013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:15,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:15,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:15,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161105555] [2024-06-03 20:04:15,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:15,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:15,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:15,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:15,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:15,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:15,992 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) [2024-06-03 20:04:15,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:15,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:15,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:17,586 INFO L124 PetriNetUnfolderBase]: 4663/7159 cut-off events. [2024-06-03 20:04:17,586 INFO L125 PetriNetUnfolderBase]: For 599314/599322 co-relation queries the response was YES. [2024-06-03 20:04:17,665 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. [2024-06-03 20:04:17,694 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 432 selfloop transitions, 97 changer transitions 0/532 dead transitions. [2024-06-03 20:04:17,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 532 transitions, 7903 flow [2024-06-03 20:04:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:04:17,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:04:17,696 INFO L175 Difference]: Start difference. First operand has 370 places, 505 transitions, 6385 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:04:17,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 532 transitions, 7903 flow [2024-06-03 20:04:19,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 532 transitions, 7723 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-03 20:04:19,423 INFO L231 Difference]: Finished difference. Result has 373 places, 511 transitions, 6619 flow [2024-06-03 20:04:19,423 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} [2024-06-03 20:04:19,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-03 20:04:19,424 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 511 transitions, 6619 flow [2024-06-03 20:04:19,424 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) [2024-06-03 20:04:19,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:19,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:19,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:04:19,425 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)] === [2024-06-03 20:04:19,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:19,425 INFO L85 PathProgramCache]: Analyzing trace with hash 786761328, now seen corresponding path program 8 times [2024-06-03 20:04:19,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:19,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970578330] [2024-06-03 20:04:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:19,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:20,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:20,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970578330] [2024-06-03 20:04:20,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970578330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:20,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:20,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:20,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533649723] [2024-06-03 20:04:20,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:20,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:20,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:20,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:20,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:20,454 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) [2024-06-03 20:04:20,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:20,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:20,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:22,056 INFO L124 PetriNetUnfolderBase]: 4689/7195 cut-off events. [2024-06-03 20:04:22,056 INFO L125 PetriNetUnfolderBase]: For 623787/623795 co-relation queries the response was YES. [2024-06-03 20:04:22,136 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. [2024-06-03 20:04:22,165 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 461 selfloop transitions, 71 changer transitions 0/535 dead transitions. [2024-06-03 20:04:22,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 535 transitions, 8147 flow [2024-06-03 20:04:22,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:22,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-03 20:04:22,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-03 20:04:22,167 INFO L175 Difference]: Start difference. First operand has 373 places, 511 transitions, 6619 flow. Second operand 8 states and 124 transitions. [2024-06-03 20:04:22,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 535 transitions, 8147 flow [2024-06-03 20:04:23,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 535 transitions, 7889 flow, removed 99 selfloop flow, removed 3 redundant places. [2024-06-03 20:04:23,874 INFO L231 Difference]: Finished difference. Result has 378 places, 517 transitions, 6735 flow [2024-06-03 20:04:23,874 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} [2024-06-03 20:04:23,874 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-03 20:04:23,875 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 517 transitions, 6735 flow [2024-06-03 20:04:23,875 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) [2024-06-03 20:04:23,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:23,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:23,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:04:23,875 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)] === [2024-06-03 20:04:23,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1407902982, now seen corresponding path program 9 times [2024-06-03 20:04:23,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:23,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110210751] [2024-06-03 20:04:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:23,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:24,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:24,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110210751] [2024-06-03 20:04:24,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110210751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:24,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:24,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:24,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784578546] [2024-06-03 20:04:24,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:24,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:24,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:24,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:24,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:24,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:24,635 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) [2024-06-03 20:04:24,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:24,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:24,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:26,247 INFO L124 PetriNetUnfolderBase]: 4709/7229 cut-off events. [2024-06-03 20:04:26,247 INFO L125 PetriNetUnfolderBase]: For 640042/640048 co-relation queries the response was YES. [2024-06-03 20:04:26,332 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. [2024-06-03 20:04:26,362 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 413 selfloop transitions, 132 changer transitions 0/548 dead transitions. [2024-06-03 20:04:26,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 548 transitions, 8509 flow [2024-06-03 20:04:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:26,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 20:04:26,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-03 20:04:26,364 INFO L175 Difference]: Start difference. First operand has 378 places, 517 transitions, 6735 flow. Second operand 8 states and 132 transitions. [2024-06-03 20:04:26,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 548 transitions, 8509 flow [2024-06-03 20:04:28,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 548 transitions, 8369 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-03 20:04:28,533 INFO L231 Difference]: Finished difference. Result has 382 places, 523 transitions, 7071 flow [2024-06-03 20:04:28,533 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} [2024-06-03 20:04:28,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-03 20:04:28,534 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 523 transitions, 7071 flow [2024-06-03 20:04:28,534 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) [2024-06-03 20:04:28,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:28,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:28,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:04:28,534 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)] === [2024-06-03 20:04:28,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:28,535 INFO L85 PathProgramCache]: Analyzing trace with hash -361262938, now seen corresponding path program 9 times [2024-06-03 20:04:28,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:28,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544343061] [2024-06-03 20:04:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:28,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:29,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:29,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544343061] [2024-06-03 20:04:29,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544343061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:29,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:29,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:29,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336296456] [2024-06-03 20:04:29,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:29,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:29,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:29,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:29,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:29,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:29,514 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) [2024-06-03 20:04:29,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:29,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:29,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:31,145 INFO L124 PetriNetUnfolderBase]: 4703/7215 cut-off events. [2024-06-03 20:04:31,145 INFO L125 PetriNetUnfolderBase]: For 642955/642963 co-relation queries the response was YES. [2024-06-03 20:04:31,229 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. [2024-06-03 20:04:31,259 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 477 selfloop transitions, 60 changer transitions 0/540 dead transitions. [2024-06-03 20:04:31,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 540 transitions, 8221 flow [2024-06-03 20:04:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-03 20:04:31,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-03 20:04:31,262 INFO L175 Difference]: Start difference. First operand has 382 places, 523 transitions, 7071 flow. Second operand 8 states and 122 transitions. [2024-06-03 20:04:31,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 540 transitions, 8221 flow [2024-06-03 20:04:33,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 540 transitions, 7976 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-03 20:04:33,360 INFO L231 Difference]: Finished difference. Result has 386 places, 523 transitions, 6952 flow [2024-06-03 20:04:33,361 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} [2024-06-03 20:04:33,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-03 20:04:33,361 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 523 transitions, 6952 flow [2024-06-03 20:04:33,361 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) [2024-06-03 20:04:33,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:33,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:33,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:04:33,362 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)] === [2024-06-03 20:04:33,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:33,362 INFO L85 PathProgramCache]: Analyzing trace with hash -771767293, now seen corresponding path program 2 times [2024-06-03 20:04:33,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:33,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368585992] [2024-06-03 20:04:33,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:33,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:34,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:34,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368585992] [2024-06-03 20:04:34,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368585992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:34,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:34,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:34,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738207530] [2024-06-03 20:04:34,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:34,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:34,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:34,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:34,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:34,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:34,171 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) [2024-06-03 20:04:34,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:34,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:34,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:36,100 INFO L124 PetriNetUnfolderBase]: 4708/7222 cut-off events. [2024-06-03 20:04:36,100 INFO L125 PetriNetUnfolderBase]: For 640451/640459 co-relation queries the response was YES. [2024-06-03 20:04:36,171 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. [2024-06-03 20:04:36,195 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 493 selfloop transitions, 40 changer transitions 0/536 dead transitions. [2024-06-03 20:04:36,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 536 transitions, 8160 flow [2024-06-03 20:04:36,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:04:36,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:04:36,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-03 20:04:36,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-03 20:04:36,197 INFO L175 Difference]: Start difference. First operand has 386 places, 523 transitions, 6952 flow. Second operand 7 states and 104 transitions. [2024-06-03 20:04:36,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 536 transitions, 8160 flow [2024-06-03 20:04:38,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 536 transitions, 8010 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 20:04:38,142 INFO L231 Difference]: Finished difference. Result has 386 places, 526 transitions, 7006 flow [2024-06-03 20:04:38,143 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} [2024-06-03 20:04:38,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-03 20:04:38,143 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 526 transitions, 7006 flow [2024-06-03 20:04:38,144 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) [2024-06-03 20:04:38,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:38,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:38,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:04:38,144 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)] === [2024-06-03 20:04:38,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:38,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2068930599, now seen corresponding path program 3 times [2024-06-03 20:04:38,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:38,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957691686] [2024-06-03 20:04:38,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:38,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:38,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:38,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957691686] [2024-06-03 20:04:38,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957691686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:38,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:38,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:38,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712058822] [2024-06-03 20:04:38,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:38,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:38,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:38,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:38,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:39,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:39,056 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) [2024-06-03 20:04:39,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:39,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:39,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:40,778 INFO L124 PetriNetUnfolderBase]: 4705/7218 cut-off events. [2024-06-03 20:04:40,778 INFO L125 PetriNetUnfolderBase]: For 651760/651768 co-relation queries the response was YES. [2024-06-03 20:04:40,853 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. [2024-06-03 20:04:40,878 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 481 selfloop transitions, 56 changer transitions 0/540 dead transitions. [2024-06-03 20:04:40,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 540 transitions, 8238 flow [2024-06-03 20:04:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:04:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:04:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-03 20:04:40,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 20:04:40,879 INFO L175 Difference]: Start difference. First operand has 386 places, 526 transitions, 7006 flow. Second operand 7 states and 105 transitions. [2024-06-03 20:04:40,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 540 transitions, 8238 flow [2024-06-03 20:04:42,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 540 transitions, 8072 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:42,567 INFO L231 Difference]: Finished difference. Result has 387 places, 529 transitions, 7082 flow [2024-06-03 20:04:42,568 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} [2024-06-03 20:04:42,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-03 20:04:42,568 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 529 transitions, 7082 flow [2024-06-03 20:04:42,568 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) [2024-06-03 20:04:42,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:42,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:42,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:04:42,569 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)] === [2024-06-03 20:04:42,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:42,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1362065372, now seen corresponding path program 10 times [2024-06-03 20:04:42,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:42,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257791878] [2024-06-03 20:04:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:42,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:43,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:43,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257791878] [2024-06-03 20:04:43,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257791878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:43,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:43,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:43,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816392643] [2024-06-03 20:04:43,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:43,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:43,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:43,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:43,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:43,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:43,378 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) [2024-06-03 20:04:43,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:43,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:43,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:45,100 INFO L124 PetriNetUnfolderBase]: 4725/7252 cut-off events. [2024-06-03 20:04:45,101 INFO L125 PetriNetUnfolderBase]: For 666089/666095 co-relation queries the response was YES. [2024-06-03 20:04:45,180 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. [2024-06-03 20:04:45,208 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 455 selfloop transitions, 92 changer transitions 0/550 dead transitions. [2024-06-03 20:04:45,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 550 transitions, 8546 flow [2024-06-03 20:04:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-03 20:04:45,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-03 20:04:45,209 INFO L175 Difference]: Start difference. First operand has 387 places, 529 transitions, 7082 flow. Second operand 8 states and 125 transitions. [2024-06-03 20:04:45,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 550 transitions, 8546 flow [2024-06-03 20:04:47,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 550 transitions, 8340 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:47,335 INFO L231 Difference]: Finished difference. Result has 389 places, 532 transitions, 7179 flow [2024-06-03 20:04:47,336 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} [2024-06-03 20:04:47,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-03 20:04:47,336 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 532 transitions, 7179 flow [2024-06-03 20:04:47,336 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) [2024-06-03 20:04:47,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:47,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:47,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:04:47,337 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)] === [2024-06-03 20:04:47,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:47,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1362302708, now seen corresponding path program 10 times [2024-06-03 20:04:47,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:47,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617889674] [2024-06-03 20:04:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:47,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:48,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:48,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617889674] [2024-06-03 20:04:48,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617889674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:48,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:48,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:48,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867282397] [2024-06-03 20:04:48,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:48,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:48,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:48,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:48,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:48,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:48,231 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) [2024-06-03 20:04:48,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:48,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:48,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:50,069 INFO L124 PetriNetUnfolderBase]: 4735/7260 cut-off events. [2024-06-03 20:04:50,069 INFO L125 PetriNetUnfolderBase]: For 658441/658449 co-relation queries the response was YES. [2024-06-03 20:04:50,151 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. [2024-06-03 20:04:50,180 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 499 selfloop transitions, 47 changer transitions 0/549 dead transitions. [2024-06-03 20:04:50,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 549 transitions, 8589 flow [2024-06-03 20:04:50,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:50,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-03 20:04:50,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-03 20:04:50,181 INFO L175 Difference]: Start difference. First operand has 389 places, 532 transitions, 7179 flow. Second operand 8 states and 118 transitions. [2024-06-03 20:04:50,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 549 transitions, 8589 flow [2024-06-03 20:04:52,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 549 transitions, 8213 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-03 20:04:52,485 INFO L231 Difference]: Finished difference. Result has 390 places, 535 transitions, 6989 flow [2024-06-03 20:04:52,485 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} [2024-06-03 20:04:52,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-03 20:04:52,486 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 535 transitions, 6989 flow [2024-06-03 20:04:52,486 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) [2024-06-03 20:04:52,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:52,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:52,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:04:52,486 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)] === [2024-06-03 20:04:52,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:52,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1184933852, now seen corresponding path program 11 times [2024-06-03 20:04:52,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:52,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113323531] [2024-06-03 20:04:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:52,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:53,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:53,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113323531] [2024-06-03 20:04:53,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113323531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:53,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:53,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:53,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436600957] [2024-06-03 20:04:53,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:53,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:53,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:53,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:53,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:53,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:53,200 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) [2024-06-03 20:04:53,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:53,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:53,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:54,997 INFO L124 PetriNetUnfolderBase]: 4755/7294 cut-off events. [2024-06-03 20:04:54,997 INFO L125 PetriNetUnfolderBase]: For 677955/677961 co-relation queries the response was YES. [2024-06-03 20:04:55,077 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. [2024-06-03 20:04:55,104 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 486 selfloop transitions, 68 changer transitions 0/557 dead transitions. [2024-06-03 20:04:55,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 557 transitions, 8463 flow [2024-06-03 20:04:55,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 20:04:55,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-03 20:04:55,105 INFO L175 Difference]: Start difference. First operand has 390 places, 535 transitions, 6989 flow. Second operand 8 states and 126 transitions. [2024-06-03 20:04:55,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 557 transitions, 8463 flow [2024-06-03 20:04:57,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 557 transitions, 8162 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-03 20:04:57,316 INFO L231 Difference]: Finished difference. Result has 390 places, 538 transitions, 6929 flow [2024-06-03 20:04:57,317 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} [2024-06-03 20:04:57,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-03 20:04:57,317 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 538 transitions, 6929 flow [2024-06-03 20:04:57,317 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) [2024-06-03 20:04:57,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:57,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:57,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:04:57,318 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)] === [2024-06-03 20:04:57,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:57,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1634852882, now seen corresponding path program 11 times [2024-06-03 20:04:57,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:57,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690351417] [2024-06-03 20:04:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:57,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:58,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:58,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690351417] [2024-06-03 20:04:58,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690351417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:58,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:58,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:58,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097420674] [2024-06-03 20:04:58,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:58,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:58,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:58,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:58,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:58,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:58,294 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) [2024-06-03 20:04:58,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:58,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:58,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:00,021 INFO L124 PetriNetUnfolderBase]: 4765/7302 cut-off events. [2024-06-03 20:05:00,021 INFO L125 PetriNetUnfolderBase]: For 682217/682225 co-relation queries the response was YES. [2024-06-03 20:05:00,099 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. [2024-06-03 20:05:00,126 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 519 selfloop transitions, 31 changer transitions 0/553 dead transitions. [2024-06-03 20:05:00,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 553 transitions, 8147 flow [2024-06-03 20:05:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-03 20:05:00,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3475609756097561 [2024-06-03 20:05:00,127 INFO L175 Difference]: Start difference. First operand has 390 places, 538 transitions, 6929 flow. Second operand 8 states and 114 transitions. [2024-06-03 20:05:00,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 553 transitions, 8147 flow [2024-06-03 20:05:02,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 553 transitions, 7804 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-03 20:05:02,241 INFO L231 Difference]: Finished difference. Result has 391 places, 541 transitions, 6732 flow [2024-06-03 20:05:02,241 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} [2024-06-03 20:05:02,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-03 20:05:02,242 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 541 transitions, 6732 flow [2024-06-03 20:05:02,242 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) [2024-06-03 20:05:02,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:02,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:02,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:05:02,242 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)] === [2024-06-03 20:05:02,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:02,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1362065558, now seen corresponding path program 12 times [2024-06-03 20:05:02,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:02,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859867876] [2024-06-03 20:05:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:02,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:03,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:03,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859867876] [2024-06-03 20:05:03,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859867876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:03,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:03,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:05:03,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792661632] [2024-06-03 20:05:03,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:03,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:05:03,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:03,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:05:03,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:05:03,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:03,350 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) [2024-06-03 20:05:03,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:03,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:03,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:05,011 INFO L124 PetriNetUnfolderBase]: 4759/7294 cut-off events. [2024-06-03 20:05:05,011 INFO L125 PetriNetUnfolderBase]: For 684671/684679 co-relation queries the response was YES. [2024-06-03 20:05:05,088 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. [2024-06-03 20:05:05,114 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 512 selfloop transitions, 39 changer transitions 0/554 dead transitions. [2024-06-03 20:05:05,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 554 transitions, 7890 flow [2024-06-03 20:05:05,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:05,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-03 20:05:05,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35365853658536583 [2024-06-03 20:05:05,115 INFO L175 Difference]: Start difference. First operand has 391 places, 541 transitions, 6732 flow. Second operand 8 states and 116 transitions. [2024-06-03 20:05:05,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 554 transitions, 7890 flow [2024-06-03 20:05:07,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 554 transitions, 7728 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-03 20:05:07,373 INFO L231 Difference]: Finished difference. Result has 393 places, 541 transitions, 6654 flow [2024-06-03 20:05:07,373 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} [2024-06-03 20:05:07,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-03 20:05:07,374 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 541 transitions, 6654 flow [2024-06-03 20:05:07,374 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) [2024-06-03 20:05:07,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:07,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:07,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:05:07,374 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)] === [2024-06-03 20:05:07,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:07,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1184813882, now seen corresponding path program 12 times [2024-06-03 20:05:07,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:07,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250386253] [2024-06-03 20:05:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:07,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:08,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:08,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250386253] [2024-06-03 20:05:08,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250386253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:08,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:08,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:05:08,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918607665] [2024-06-03 20:05:08,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:08,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:05:08,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:08,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:05:08,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:05:08,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:08,150 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) [2024-06-03 20:05:08,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:08,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:08,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:09,954 INFO L124 PetriNetUnfolderBase]: 4776/7324 cut-off events. [2024-06-03 20:05:09,954 INFO L125 PetriNetUnfolderBase]: For 703947/703953 co-relation queries the response was YES. [2024-06-03 20:05:10,031 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. [2024-06-03 20:05:10,057 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 496 selfloop transitions, 65 changer transitions 0/564 dead transitions. [2024-06-03 20:05:10,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 564 transitions, 7958 flow [2024-06-03 20:05:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 20:05:10,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 20:05:10,058 INFO L175 Difference]: Start difference. First operand has 393 places, 541 transitions, 6654 flow. Second operand 8 states and 123 transitions. [2024-06-03 20:05:10,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 564 transitions, 7958 flow [2024-06-03 20:05:11,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 564 transitions, 7846 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 20:05:11,901 INFO L231 Difference]: Finished difference. Result has 395 places, 548 transitions, 6802 flow [2024-06-03 20:05:11,901 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} [2024-06-03 20:05:11,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-03 20:05:11,902 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 548 transitions, 6802 flow [2024-06-03 20:05:11,902 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) [2024-06-03 20:05:11,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:11,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:11,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:05:11,902 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)] === [2024-06-03 20:05:11,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:11,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1184810906, now seen corresponding path program 3 times [2024-06-03 20:05:11,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:11,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705363092] [2024-06-03 20:05:11,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:11,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:12,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:12,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705363092] [2024-06-03 20:05:12,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705363092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:12,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:12,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:12,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539271738] [2024-06-03 20:05:12,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:12,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:12,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:12,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:12,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:12,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:12,933 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) [2024-06-03 20:05:12,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:12,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:12,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:14,853 INFO L124 PetriNetUnfolderBase]: 4820/7392 cut-off events. [2024-06-03 20:05:14,853 INFO L125 PetriNetUnfolderBase]: For 755365/755371 co-relation queries the response was YES. [2024-06-03 20:05:14,930 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. [2024-06-03 20:05:14,954 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 505 selfloop transitions, 61 changer transitions 0/569 dead transitions. [2024-06-03 20:05:14,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 569 transitions, 8118 flow [2024-06-03 20:05:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-03 20:05:14,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-03 20:05:14,956 INFO L175 Difference]: Start difference. First operand has 395 places, 548 transitions, 6802 flow. Second operand 8 states and 124 transitions. [2024-06-03 20:05:14,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 569 transitions, 8118 flow [2024-06-03 20:05:17,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 569 transitions, 7928 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-03 20:05:17,059 INFO L231 Difference]: Finished difference. Result has 399 places, 549 transitions, 6772 flow [2024-06-03 20:05:17,059 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} [2024-06-03 20:05:17,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-03 20:05:17,060 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 549 transitions, 6772 flow [2024-06-03 20:05:17,060 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) [2024-06-03 20:05:17,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:17,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:17,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:05:17,060 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)] === [2024-06-03 20:05:17,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:17,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1185210620, now seen corresponding path program 3 times [2024-06-03 20:05:17,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:17,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485153796] [2024-06-03 20:05:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:17,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:17,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:17,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485153796] [2024-06-03 20:05:17,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485153796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:17,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:17,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:05:17,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361262266] [2024-06-03 20:05:17,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:17,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:05:17,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:17,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:05:17,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:05:17,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:17,936 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) [2024-06-03 20:05:17,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:17,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:17,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:19,790 INFO L124 PetriNetUnfolderBase]: 4848/7436 cut-off events. [2024-06-03 20:05:19,791 INFO L125 PetriNetUnfolderBase]: For 754034/754040 co-relation queries the response was YES. [2024-06-03 20:05:19,869 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. [2024-06-03 20:05:19,896 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 509 selfloop transitions, 62 changer transitions 0/574 dead transitions. [2024-06-03 20:05:19,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 574 transitions, 8138 flow [2024-06-03 20:05:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 20:05:19,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-03 20:05:19,898 INFO L175 Difference]: Start difference. First operand has 399 places, 549 transitions, 6772 flow. Second operand 8 states and 127 transitions. [2024-06-03 20:05:19,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 574 transitions, 8138 flow [2024-06-03 20:05:22,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 574 transitions, 8002 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:05:22,159 INFO L231 Difference]: Finished difference. Result has 401 places, 550 transitions, 6798 flow [2024-06-03 20:05:22,159 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} [2024-06-03 20:05:22,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-03 20:05:22,160 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 550 transitions, 6798 flow [2024-06-03 20:05:22,160 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) [2024-06-03 20:05:22,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:22,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:22,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:05:22,160 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)] === [2024-06-03 20:05:22,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:22,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1628039420, now seen corresponding path program 4 times [2024-06-03 20:05:22,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:22,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838518448] [2024-06-03 20:05:22,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:22,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:23,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:23,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838518448] [2024-06-03 20:05:23,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838518448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:23,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:23,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:05:23,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566626186] [2024-06-03 20:05:23,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:23,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:05:23,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:23,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:05:23,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:05:23,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:23,121 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) [2024-06-03 20:05:23,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:23,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:23,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:25,068 INFO L124 PetriNetUnfolderBase]: 4850/7442 cut-off events. [2024-06-03 20:05:25,068 INFO L125 PetriNetUnfolderBase]: For 749621/749627 co-relation queries the response was YES. [2024-06-03 20:05:25,146 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. [2024-06-03 20:05:25,172 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 501 selfloop transitions, 70 changer transitions 0/574 dead transitions. [2024-06-03 20:05:25,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 574 transitions, 8148 flow [2024-06-03 20:05:25,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-03 20:05:25,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-03 20:05:25,173 INFO L175 Difference]: Start difference. First operand has 401 places, 550 transitions, 6798 flow. Second operand 8 states and 125 transitions. [2024-06-03 20:05:25,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 574 transitions, 8148 flow [2024-06-03 20:05:27,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 574 transitions, 8002 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 20:05:27,284 INFO L231 Difference]: Finished difference. Result has 403 places, 551 transitions, 6832 flow [2024-06-03 20:05:27,284 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} [2024-06-03 20:05:27,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-03 20:05:27,285 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 551 transitions, 6832 flow [2024-06-03 20:05:27,285 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) [2024-06-03 20:05:27,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:27,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:27,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:05:27,285 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)] === [2024-06-03 20:05:27,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:27,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1660208732, now seen corresponding path program 4 times [2024-06-03 20:05:27,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:27,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938309429] [2024-06-03 20:05:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:27,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:27,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:27,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938309429] [2024-06-03 20:05:27,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938309429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:27,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:27,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:05:27,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350137640] [2024-06-03 20:05:27,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:27,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:05:27,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:27,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:05:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:05:27,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:05:27,994 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) [2024-06-03 20:05:27,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:27,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:05:27,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:29,978 INFO L124 PetriNetUnfolderBase]: 4693/7262 cut-off events. [2024-06-03 20:05:29,978 INFO L125 PetriNetUnfolderBase]: For 725504/725554 co-relation queries the response was YES. [2024-06-03 20:05:30,051 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. [2024-06-03 20:05:30,076 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 455 selfloop transitions, 64 changer transitions 0/575 dead transitions. [2024-06-03 20:05:30,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 575 transitions, 8066 flow [2024-06-03 20:05:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:05:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:05:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 20:05:30,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-03 20:05:30,077 INFO L175 Difference]: Start difference. First operand has 403 places, 551 transitions, 6832 flow. Second operand 7 states and 121 transitions. [2024-06-03 20:05:30,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 575 transitions, 8066 flow [2024-06-03 20:05:32,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 575 transitions, 7902 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:05:32,171 INFO L231 Difference]: Finished difference. Result has 404 places, 551 transitions, 6802 flow [2024-06-03 20:05:32,172 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} [2024-06-03 20:05:32,172 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-03 20:05:32,172 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 551 transitions, 6802 flow [2024-06-03 20:05:32,172 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) [2024-06-03 20:05:32,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:32,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:32,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:05:32,173 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)] === [2024-06-03 20:05:32,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:32,173 INFO L85 PathProgramCache]: Analyzing trace with hash 642731856, now seen corresponding path program 1 times [2024-06-03 20:05:32,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:32,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323441740] [2024-06-03 20:05:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:32,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:33,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:33,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323441740] [2024-06-03 20:05:33,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323441740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:33,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:33,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:33,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933288882] [2024-06-03 20:05:33,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:33,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:33,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:33,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:33,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:33,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:33,833 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) [2024-06-03 20:05:33,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:33,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:33,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:35,772 INFO L124 PetriNetUnfolderBase]: 4895/7498 cut-off events. [2024-06-03 20:05:35,772 INFO L125 PetriNetUnfolderBase]: For 742312/742320 co-relation queries the response was YES. [2024-06-03 20:05:35,856 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. [2024-06-03 20:05:35,884 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 505 selfloop transitions, 82 changer transitions 0/590 dead transitions. [2024-06-03 20:05:35,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 590 transitions, 8546 flow [2024-06-03 20:05:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:05:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:05:35,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-03 20:05:35,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-03 20:05:35,885 INFO L175 Difference]: Start difference. First operand has 404 places, 551 transitions, 6802 flow. Second operand 10 states and 156 transitions. [2024-06-03 20:05:35,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 590 transitions, 8546 flow [2024-06-03 20:05:38,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 590 transitions, 8356 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:05:38,137 INFO L231 Difference]: Finished difference. Result has 408 places, 562 transitions, 7088 flow [2024-06-03 20:05:38,138 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} [2024-06-03 20:05:38,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-03 20:05:38,138 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 562 transitions, 7088 flow [2024-06-03 20:05:38,138 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) [2024-06-03 20:05:38,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:38,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:38,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:05:38,139 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)] === [2024-06-03 20:05:38,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:38,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1413163248, now seen corresponding path program 2 times [2024-06-03 20:05:38,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:38,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273643028] [2024-06-03 20:05:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:38,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:39,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:39,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273643028] [2024-06-03 20:05:39,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273643028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:39,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:39,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:39,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904750653] [2024-06-03 20:05:39,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:39,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:39,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:39,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:39,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:39,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:39,357 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) [2024-06-03 20:05:39,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:39,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:39,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:41,270 INFO L124 PetriNetUnfolderBase]: 4883/7482 cut-off events. [2024-06-03 20:05:41,270 INFO L125 PetriNetUnfolderBase]: For 725628/725636 co-relation queries the response was YES. [2024-06-03 20:05:41,357 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. [2024-06-03 20:05:41,386 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 510 selfloop transitions, 72 changer transitions 0/585 dead transitions. [2024-06-03 20:05:41,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 585 transitions, 8367 flow [2024-06-03 20:05:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:05:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:05:41,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-03 20:05:41,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-03 20:05:41,388 INFO L175 Difference]: Start difference. First operand has 408 places, 562 transitions, 7088 flow. Second operand 9 states and 138 transitions. [2024-06-03 20:05:41,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 585 transitions, 8367 flow [2024-06-03 20:05:43,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 585 transitions, 8028 flow, removed 125 selfloop flow, removed 6 redundant places. [2024-06-03 20:05:43,803 INFO L231 Difference]: Finished difference. Result has 411 places, 563 transitions, 6937 flow [2024-06-03 20:05:43,804 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} [2024-06-03 20:05:43,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-03 20:05:43,804 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 563 transitions, 6937 flow [2024-06-03 20:05:43,804 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) [2024-06-03 20:05:43,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:43,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:43,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:05:43,805 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)] === [2024-06-03 20:05:43,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:43,805 INFO L85 PathProgramCache]: Analyzing trace with hash 642885678, now seen corresponding path program 1 times [2024-06-03 20:05:43,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:43,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494734832] [2024-06-03 20:05:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:43,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:44,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:44,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494734832] [2024-06-03 20:05:44,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494734832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:44,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:44,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:05:44,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551811070] [2024-06-03 20:05:44,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:44,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:05:44,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:44,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:05:44,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:05:45,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:45,010 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) [2024-06-03 20:05:45,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:45,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:45,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:46,762 INFO L124 PetriNetUnfolderBase]: 4891/7501 cut-off events. [2024-06-03 20:05:46,762 INFO L125 PetriNetUnfolderBase]: For 730056/730056 co-relation queries the response was YES. [2024-06-03 20:05:46,854 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. [2024-06-03 20:05:46,885 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 552 selfloop transitions, 30 changer transitions 0/585 dead transitions. [2024-06-03 20:05:46,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 585 transitions, 8247 flow [2024-06-03 20:05:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-03 20:05:46,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-03 20:05:46,886 INFO L175 Difference]: Start difference. First operand has 411 places, 563 transitions, 6937 flow. Second operand 8 states and 122 transitions. [2024-06-03 20:05:46,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 585 transitions, 8247 flow [2024-06-03 20:05:49,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 585 transitions, 8104 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 20:05:49,632 INFO L231 Difference]: Finished difference. Result has 412 places, 565 transitions, 6925 flow [2024-06-03 20:05:49,632 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} [2024-06-03 20:05:49,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-03 20:05:49,633 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 565 transitions, 6925 flow [2024-06-03 20:05:49,633 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) [2024-06-03 20:05:49,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:49,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:49,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:05:49,633 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)] === [2024-06-03 20:05:49,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:49,633 INFO L85 PathProgramCache]: Analyzing trace with hash -504907390, now seen corresponding path program 3 times [2024-06-03 20:05:49,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:49,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803260435] [2024-06-03 20:05:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:49,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:50,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:50,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803260435] [2024-06-03 20:05:50,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803260435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:50,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:50,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:50,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862659258] [2024-06-03 20:05:50,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:50,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:50,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:50,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:50,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:50,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:50,899 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) [2024-06-03 20:05:50,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:50,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:50,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:52,680 INFO L124 PetriNetUnfolderBase]: 4893/7504 cut-off events. [2024-06-03 20:05:52,680 INFO L125 PetriNetUnfolderBase]: For 739229/739229 co-relation queries the response was YES. [2024-06-03 20:05:52,772 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. [2024-06-03 20:05:52,802 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 538 selfloop transitions, 53 changer transitions 0/594 dead transitions. [2024-06-03 20:05:52,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 594 transitions, 8341 flow [2024-06-03 20:05:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:52,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:05:52,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:05:52,803 INFO L175 Difference]: Start difference. First operand has 412 places, 565 transitions, 6925 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:05:52,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 594 transitions, 8341 flow [2024-06-03 20:05:55,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 594 transitions, 8226 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 20:05:55,137 INFO L231 Difference]: Finished difference. Result has 416 places, 574 transitions, 7120 flow [2024-06-03 20:05:55,138 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} [2024-06-03 20:05:55,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-03 20:05:55,138 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 574 transitions, 7120 flow [2024-06-03 20:05:55,138 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) [2024-06-03 20:05:55,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:55,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:55,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:05:55,139 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)] === [2024-06-03 20:05:55,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:55,139 INFO L85 PathProgramCache]: Analyzing trace with hash 786978018, now seen corresponding path program 2 times [2024-06-03 20:05:55,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:55,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738476595] [2024-06-03 20:05:55,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:55,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:56,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:56,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738476595] [2024-06-03 20:05:56,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738476595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:56,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:56,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:56,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528948333] [2024-06-03 20:05:56,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:56,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:56,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:56,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:56,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:56,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:56,412 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) [2024-06-03 20:05:56,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:56,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:56,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:58,165 INFO L124 PetriNetUnfolderBase]: 4901/7516 cut-off events. [2024-06-03 20:05:58,166 INFO L125 PetriNetUnfolderBase]: For 755043/755043 co-relation queries the response was YES. [2024-06-03 20:05:58,259 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. [2024-06-03 20:05:58,291 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 568 selfloop transitions, 22 changer transitions 0/593 dead transitions. [2024-06-03 20:05:58,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 593 transitions, 8442 flow [2024-06-03 20:05:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:58,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-03 20:05:58,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-03 20:05:58,292 INFO L175 Difference]: Start difference. First operand has 416 places, 574 transitions, 7120 flow. Second operand 8 states and 118 transitions. [2024-06-03 20:05:58,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 593 transitions, 8442 flow [2024-06-03 20:06:00,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 593 transitions, 8286 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-03 20:06:00,933 INFO L231 Difference]: Finished difference. Result has 419 places, 576 transitions, 7085 flow [2024-06-03 20:06:00,934 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} [2024-06-03 20:06:00,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-03 20:06:00,934 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 576 transitions, 7085 flow [2024-06-03 20:06:00,934 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) [2024-06-03 20:06:00,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:00,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:00,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:06:00,935 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)] === [2024-06-03 20:06:00,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:00,935 INFO L85 PathProgramCache]: Analyzing trace with hash 786985458, now seen corresponding path program 3 times [2024-06-03 20:06:00,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:00,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317524549] [2024-06-03 20:06:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:00,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:02,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:02,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317524549] [2024-06-03 20:06:02,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317524549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:02,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:02,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:02,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451981809] [2024-06-03 20:06:02,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:02,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:02,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:02,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:02,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:02,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:02,334 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) [2024-06-03 20:06:02,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:02,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:02,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:04,120 INFO L124 PetriNetUnfolderBase]: 4909/7528 cut-off events. [2024-06-03 20:06:04,121 INFO L125 PetriNetUnfolderBase]: For 756276/756276 co-relation queries the response was YES. [2024-06-03 20:06:04,210 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. [2024-06-03 20:06:04,241 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 571 selfloop transitions, 21 changer transitions 0/595 dead transitions. [2024-06-03 20:06:04,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 595 transitions, 8405 flow [2024-06-03 20:06:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-03 20:06:04,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567073170731707 [2024-06-03 20:06:04,242 INFO L175 Difference]: Start difference. First operand has 419 places, 576 transitions, 7085 flow. Second operand 8 states and 117 transitions. [2024-06-03 20:06:04,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 595 transitions, 8405 flow [2024-06-03 20:06:06,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 595 transitions, 8300 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:06,748 INFO L231 Difference]: Finished difference. Result has 421 places, 578 transitions, 7103 flow [2024-06-03 20:06:06,749 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} [2024-06-03 20:06:06,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-03 20:06:06,749 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 578 transitions, 7103 flow [2024-06-03 20:06:06,749 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) [2024-06-03 20:06:06,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:06,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:06,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:06:06,750 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)] === [2024-06-03 20:06:06,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:06,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1499185936, now seen corresponding path program 4 times [2024-06-03 20:06:06,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:06,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620058089] [2024-06-03 20:06:06,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:06,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:07,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:07,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620058089] [2024-06-03 20:06:07,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620058089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:07,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:07,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:07,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446648303] [2024-06-03 20:06:07,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:07,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:07,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:07,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:07,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:08,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:08,010 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) [2024-06-03 20:06:08,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:08,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:08,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:09,806 INFO L124 PetriNetUnfolderBase]: 4917/7540 cut-off events. [2024-06-03 20:06:09,807 INFO L125 PetriNetUnfolderBase]: For 771210/771210 co-relation queries the response was YES. [2024-06-03 20:06:09,899 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. [2024-06-03 20:06:09,930 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 573 selfloop transitions, 17 changer transitions 0/593 dead transitions. [2024-06-03 20:06:09,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 593 transitions, 8391 flow [2024-06-03 20:06:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-03 20:06:09,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3384146341463415 [2024-06-03 20:06:09,931 INFO L175 Difference]: Start difference. First operand has 421 places, 578 transitions, 7103 flow. Second operand 8 states and 111 transitions. [2024-06-03 20:06:09,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 593 transitions, 8391 flow [2024-06-03 20:06:12,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 593 transitions, 8284 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:12,864 INFO L231 Difference]: Finished difference. Result has 423 places, 580 transitions, 7115 flow [2024-06-03 20:06:12,864 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} [2024-06-03 20:06:12,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-03 20:06:12,865 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 580 transitions, 7115 flow [2024-06-03 20:06:12,865 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) [2024-06-03 20:06:12,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:12,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:12,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:06:12,865 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)] === [2024-06-03 20:06:12,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1812438242, now seen corresponding path program 5 times [2024-06-03 20:06:12,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:12,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788602162] [2024-06-03 20:06:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:12,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:14,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:14,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788602162] [2024-06-03 20:06:14,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788602162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:14,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:14,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:14,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129499262] [2024-06-03 20:06:14,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:14,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:14,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:14,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:14,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:14,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:14,187 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) [2024-06-03 20:06:14,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:14,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:14,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:16,166 INFO L124 PetriNetUnfolderBase]: 4925/7552 cut-off events. [2024-06-03 20:06:16,166 INFO L125 PetriNetUnfolderBase]: For 786605/786605 co-relation queries the response was YES. [2024-06-03 20:06:16,244 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. [2024-06-03 20:06:16,269 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 575 selfloop transitions, 17 changer transitions 0/595 dead transitions. [2024-06-03 20:06:16,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 595 transitions, 8431 flow [2024-06-03 20:06:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-03 20:06:16,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-03 20:06:16,270 INFO L175 Difference]: Start difference. First operand has 423 places, 580 transitions, 7115 flow. Second operand 8 states and 112 transitions. [2024-06-03 20:06:16,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 595 transitions, 8431 flow [2024-06-03 20:06:19,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 595 transitions, 8328 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:19,016 INFO L231 Difference]: Finished difference. Result has 425 places, 582 transitions, 7135 flow [2024-06-03 20:06:19,017 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} [2024-06-03 20:06:19,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-03 20:06:19,017 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 582 transitions, 7135 flow [2024-06-03 20:06:19,017 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) [2024-06-03 20:06:19,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:19,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:19,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:06:19,018 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)] === [2024-06-03 20:06:19,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1619019691, now seen corresponding path program 1 times [2024-06-03 20:06:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:19,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745528694] [2024-06-03 20:06:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:19,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:20,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:20,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745528694] [2024-06-03 20:06:20,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745528694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:20,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:20,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:20,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886451056] [2024-06-03 20:06:20,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:20,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:20,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:20,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:20,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:20,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:20,246 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) [2024-06-03 20:06:20,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:20,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:20,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:22,083 INFO L124 PetriNetUnfolderBase]: 4919/7544 cut-off events. [2024-06-03 20:06:22,084 INFO L125 PetriNetUnfolderBase]: For 790328/790328 co-relation queries the response was YES. [2024-06-03 20:06:22,169 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. [2024-06-03 20:06:22,197 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 566 selfloop transitions, 31 changer transitions 0/600 dead transitions. [2024-06-03 20:06:22,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 600 transitions, 8530 flow [2024-06-03 20:06:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-03 20:06:22,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35060975609756095 [2024-06-03 20:06:22,199 INFO L175 Difference]: Start difference. First operand has 425 places, 582 transitions, 7135 flow. Second operand 8 states and 115 transitions. [2024-06-03 20:06:22,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 600 transitions, 8530 flow [2024-06-03 20:06:24,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 600 transitions, 8423 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:24,864 INFO L231 Difference]: Finished difference. Result has 427 places, 585 transitions, 7214 flow [2024-06-03 20:06:24,865 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} [2024-06-03 20:06:24,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-03 20:06:24,865 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 585 transitions, 7214 flow [2024-06-03 20:06:24,865 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) [2024-06-03 20:06:24,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:24,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:24,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:06:24,866 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)] === [2024-06-03 20:06:24,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:24,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1619019908, now seen corresponding path program 6 times [2024-06-03 20:06:24,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:24,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94919712] [2024-06-03 20:06:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:24,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:26,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:26,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94919712] [2024-06-03 20:06:26,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94919712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:26,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:26,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:26,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488106117] [2024-06-03 20:06:26,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:26,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:26,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:26,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:26,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:26,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:26,098 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) [2024-06-03 20:06:26,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:26,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:26,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:27,972 INFO L124 PetriNetUnfolderBase]: 4927/7556 cut-off events. [2024-06-03 20:06:27,972 INFO L125 PetriNetUnfolderBase]: For 807444/807444 co-relation queries the response was YES. [2024-06-03 20:06:28,061 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. [2024-06-03 20:06:28,089 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 570 selfloop transitions, 27 changer transitions 0/600 dead transitions. [2024-06-03 20:06:28,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 600 transitions, 8546 flow [2024-06-03 20:06:28,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-03 20:06:28,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445121951219512 [2024-06-03 20:06:28,091 INFO L175 Difference]: Start difference. First operand has 427 places, 585 transitions, 7214 flow. Second operand 8 states and 113 transitions. [2024-06-03 20:06:28,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 600 transitions, 8546 flow [2024-06-03 20:06:31,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 600 transitions, 8408 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:31,024 INFO L231 Difference]: Finished difference. Result has 429 places, 587 transitions, 7228 flow [2024-06-03 20:06:31,025 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} [2024-06-03 20:06:31,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-03 20:06:31,025 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 587 transitions, 7228 flow [2024-06-03 20:06:31,025 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) [2024-06-03 20:06:31,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:31,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:31,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:06:31,026 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)] === [2024-06-03 20:06:31,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:31,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1362526838, now seen corresponding path program 7 times [2024-06-03 20:06:31,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:31,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161493786] [2024-06-03 20:06:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:31,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:32,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:32,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161493786] [2024-06-03 20:06:32,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161493786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:32,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:32,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:32,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807275681] [2024-06-03 20:06:32,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:32,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:32,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:32,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:32,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:32,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:32,337 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) [2024-06-03 20:06:32,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:32,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:32,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:34,123 INFO L124 PetriNetUnfolderBase]: 4935/7568 cut-off events. [2024-06-03 20:06:34,123 INFO L125 PetriNetUnfolderBase]: For 823249/823249 co-relation queries the response was YES. [2024-06-03 20:06:34,217 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. [2024-06-03 20:06:34,249 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 583 selfloop transitions, 16 changer transitions 0/602 dead transitions. [2024-06-03 20:06:34,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 602 transitions, 8558 flow [2024-06-03 20:06:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-03 20:06:34,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3384146341463415 [2024-06-03 20:06:34,250 INFO L175 Difference]: Start difference. First operand has 429 places, 587 transitions, 7228 flow. Second operand 8 states and 111 transitions. [2024-06-03 20:06:34,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 602 transitions, 8558 flow [2024-06-03 20:06:37,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 602 transitions, 8422 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:37,193 INFO L231 Difference]: Finished difference. Result has 431 places, 589 transitions, 7223 flow [2024-06-03 20:06:37,193 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} [2024-06-03 20:06:37,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-03 20:06:37,194 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 589 transitions, 7223 flow [2024-06-03 20:06:37,194 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) [2024-06-03 20:06:37,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:37,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:37,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:06:37,194 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)] === [2024-06-03 20:06:37,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:37,195 INFO L85 PathProgramCache]: Analyzing trace with hash 2068946192, now seen corresponding path program 8 times [2024-06-03 20:06:37,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:37,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894211368] [2024-06-03 20:06:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:37,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:38,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:38,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894211368] [2024-06-03 20:06:38,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894211368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:38,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:38,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:38,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926273772] [2024-06-03 20:06:38,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:38,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:38,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:38,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:38,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:38,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:38,397 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) [2024-06-03 20:06:38,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:38,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:38,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:40,188 INFO L124 PetriNetUnfolderBase]: 4930/7561 cut-off events. [2024-06-03 20:06:40,189 INFO L125 PetriNetUnfolderBase]: For 810447/810447 co-relation queries the response was YES. [2024-06-03 20:06:40,282 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. [2024-06-03 20:06:40,311 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 576 selfloop transitions, 25 changer transitions 0/604 dead transitions. [2024-06-03 20:06:40,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 604 transitions, 8557 flow [2024-06-03 20:06:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:40,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-03 20:06:40,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-03 20:06:40,312 INFO L175 Difference]: Start difference. First operand has 431 places, 589 transitions, 7223 flow. Second operand 8 states and 112 transitions. [2024-06-03 20:06:40,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 604 transitions, 8557 flow [2024-06-03 20:06:43,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 604 transitions, 8446 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:43,041 INFO L231 Difference]: Finished difference. Result has 433 places, 591 transitions, 7264 flow [2024-06-03 20:06:43,041 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} [2024-06-03 20:06:43,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-03 20:06:43,041 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 591 transitions, 7264 flow [2024-06-03 20:06:43,041 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) [2024-06-03 20:06:43,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:43,042 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] [2024-06-03 20:06:43,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:06:43,042 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)] === [2024-06-03 20:06:43,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:43,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1813476907, now seen corresponding path program 1 times [2024-06-03 20:06:43,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:43,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689976069] [2024-06-03 20:06:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:43,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:44,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:44,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689976069] [2024-06-03 20:06:44,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689976069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:44,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:44,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:44,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445451920] [2024-06-03 20:06:44,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:44,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:44,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:44,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:44,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:44,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:44,131 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) [2024-06-03 20:06:44,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:44,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:44,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:46,117 INFO L124 PetriNetUnfolderBase]: 4942/7571 cut-off events. [2024-06-03 20:06:46,117 INFO L125 PetriNetUnfolderBase]: For 818332/818340 co-relation queries the response was YES. [2024-06-03 20:06:46,212 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. [2024-06-03 20:06:46,243 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 529 selfloop transitions, 98 changer transitions 0/630 dead transitions. [2024-06-03 20:06:46,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 630 transitions, 9068 flow [2024-06-03 20:06:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 20:06:46,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:06:46,245 INFO L175 Difference]: Start difference. First operand has 433 places, 591 transitions, 7264 flow. Second operand 9 states and 144 transitions. [2024-06-03 20:06:46,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 630 transitions, 9068 flow [2024-06-03 20:06:48,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 630 transitions, 8880 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:48,726 INFO L231 Difference]: Finished difference. Result has 438 places, 605 transitions, 7590 flow [2024-06-03 20:06:48,727 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} [2024-06-03 20:06:48,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-03 20:06:48,727 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 605 transitions, 7590 flow [2024-06-03 20:06:48,727 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) [2024-06-03 20:06:48,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:48,727 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] [2024-06-03 20:06:48,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:06:48,728 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)] === [2024-06-03 20:06:48,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:48,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2013516937, now seen corresponding path program 2 times [2024-06-03 20:06:48,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:48,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359323952] [2024-06-03 20:06:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:48,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:49,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:49,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359323952] [2024-06-03 20:06:49,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359323952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:49,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:49,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:49,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887258000] [2024-06-03 20:06:49,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:49,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:49,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:49,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:49,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:49,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:49,760 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) [2024-06-03 20:06:49,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:49,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:49,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:51,789 INFO L124 PetriNetUnfolderBase]: 4952/7585 cut-off events. [2024-06-03 20:06:51,789 INFO L125 PetriNetUnfolderBase]: For 818612/818620 co-relation queries the response was YES. [2024-06-03 20:06:51,887 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. [2024-06-03 20:06:51,918 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 547 selfloop transitions, 78 changer transitions 0/628 dead transitions. [2024-06-03 20:06:51,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 628 transitions, 9034 flow [2024-06-03 20:06:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:51,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:51,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-03 20:06:51,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-03 20:06:51,920 INFO L175 Difference]: Start difference. First operand has 438 places, 605 transitions, 7590 flow. Second operand 9 states and 138 transitions. [2024-06-03 20:06:51,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 628 transitions, 9034 flow [2024-06-03 20:06:55,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 628 transitions, 8769 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-03 20:06:55,338 INFO L231 Difference]: Finished difference. Result has 440 places, 609 transitions, 7619 flow [2024-06-03 20:06:55,339 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} [2024-06-03 20:06:55,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-03 20:06:55,339 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 609 transitions, 7619 flow [2024-06-03 20:06:55,339 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) [2024-06-03 20:06:55,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:55,339 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] [2024-06-03 20:06:55,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:06:55,340 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)] === [2024-06-03 20:06:55,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:55,340 INFO L85 PathProgramCache]: Analyzing trace with hash -757665058, now seen corresponding path program 1 times [2024-06-03 20:06:55,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:55,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579278911] [2024-06-03 20:06:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:55,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:56,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:56,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579278911] [2024-06-03 20:06:56,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579278911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:56,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:56,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:56,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820123932] [2024-06-03 20:06:56,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:56,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:56,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:56,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:56,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:56,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:56,367 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) [2024-06-03 20:06:56,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:56,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:56,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:58,316 INFO L124 PetriNetUnfolderBase]: 5004/7660 cut-off events. [2024-06-03 20:06:58,316 INFO L125 PetriNetUnfolderBase]: For 855410/855424 co-relation queries the response was YES. [2024-06-03 20:06:58,416 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. [2024-06-03 20:06:58,448 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 546 selfloop transitions, 98 changer transitions 0/647 dead transitions. [2024-06-03 20:06:58,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 647 transitions, 9491 flow [2024-06-03 20:06:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:06:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:06:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-03 20:06:58,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:06:58,452 INFO L175 Difference]: Start difference. First operand has 440 places, 609 transitions, 7619 flow. Second operand 10 states and 160 transitions. [2024-06-03 20:06:58,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 647 transitions, 9491 flow [2024-06-03 20:07:01,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 647 transitions, 9278 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:01,809 INFO L231 Difference]: Finished difference. Result has 443 places, 615 transitions, 7841 flow [2024-06-03 20:07:01,809 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} [2024-06-03 20:07:01,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-03 20:07:01,811 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 615 transitions, 7841 flow [2024-06-03 20:07:01,811 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) [2024-06-03 20:07:01,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:01,812 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] [2024-06-03 20:07:01,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:07:01,813 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)] === [2024-06-03 20:07:01,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:01,813 INFO L85 PathProgramCache]: Analyzing trace with hash -757515328, now seen corresponding path program 2 times [2024-06-03 20:07:01,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:01,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017447563] [2024-06-03 20:07:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:01,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:02,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:02,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017447563] [2024-06-03 20:07:02,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017447563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:02,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:02,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:02,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771970522] [2024-06-03 20:07:02,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:02,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:02,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:02,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:02,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:02,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:02,798 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) [2024-06-03 20:07:02,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:02,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:02,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:04,834 INFO L124 PetriNetUnfolderBase]: 5024/7688 cut-off events. [2024-06-03 20:07:04,834 INFO L125 PetriNetUnfolderBase]: For 863308/863322 co-relation queries the response was YES. [2024-06-03 20:07:04,930 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. [2024-06-03 20:07:04,960 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 552 selfloop transitions, 91 changer transitions 0/646 dead transitions. [2024-06-03 20:07:04,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 646 transitions, 9383 flow [2024-06-03 20:07:04,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:07:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:07:04,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-03 20:07:04,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-03 20:07:04,962 INFO L175 Difference]: Start difference. First operand has 443 places, 615 transitions, 7841 flow. Second operand 10 states and 155 transitions. [2024-06-03 20:07:04,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 646 transitions, 9383 flow [2024-06-03 20:07:08,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 646 transitions, 9067 flow, removed 101 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:08,032 INFO L231 Difference]: Finished difference. Result has 447 places, 618 transitions, 7837 flow [2024-06-03 20:07:08,032 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} [2024-06-03 20:07:08,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-03 20:07:08,032 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 618 transitions, 7837 flow [2024-06-03 20:07:08,033 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) [2024-06-03 20:07:08,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:08,033 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] [2024-06-03 20:07:08,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:07:08,033 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)] === [2024-06-03 20:07:08,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:08,033 INFO L85 PathProgramCache]: Analyzing trace with hash -550861888, now seen corresponding path program 3 times [2024-06-03 20:07:08,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:08,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614509256] [2024-06-03 20:07:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:08,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:08,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:08,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614509256] [2024-06-03 20:07:08,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614509256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:08,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:08,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:08,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980071536] [2024-06-03 20:07:08,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:08,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:08,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:08,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:08,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:09,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:09,028 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) [2024-06-03 20:07:09,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:09,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:09,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:11,025 INFO L124 PetriNetUnfolderBase]: 5044/7716 cut-off events. [2024-06-03 20:07:11,025 INFO L125 PetriNetUnfolderBase]: For 872750/872764 co-relation queries the response was YES. [2024-06-03 20:07:11,124 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. [2024-06-03 20:07:11,154 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 562 selfloop transitions, 79 changer transitions 0/644 dead transitions. [2024-06-03 20:07:11,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 644 transitions, 9301 flow [2024-06-03 20:07:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:07:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:07:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-03 20:07:11,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36341463414634145 [2024-06-03 20:07:11,156 INFO L175 Difference]: Start difference. First operand has 447 places, 618 transitions, 7837 flow. Second operand 10 states and 149 transitions. [2024-06-03 20:07:11,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 644 transitions, 9301 flow [2024-06-03 20:07:14,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 644 transitions, 9065 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-03 20:07:14,794 INFO L231 Difference]: Finished difference. Result has 449 places, 621 transitions, 7847 flow [2024-06-03 20:07:14,795 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} [2024-06-03 20:07:14,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-03 20:07:14,795 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 621 transitions, 7847 flow [2024-06-03 20:07:14,795 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) [2024-06-03 20:07:14,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:14,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:14,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:07:14,796 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)] === [2024-06-03 20:07:14,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:14,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1820007449, now seen corresponding path program 1 times [2024-06-03 20:07:14,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:14,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390879723] [2024-06-03 20:07:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:14,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:15,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:15,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390879723] [2024-06-03 20:07:15,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390879723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:15,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:15,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:15,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96397069] [2024-06-03 20:07:15,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:15,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:15,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:15,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:15,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:15,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:15,681 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) [2024-06-03 20:07:15,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:15,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:15,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:17,913 INFO L124 PetriNetUnfolderBase]: 5054/7730 cut-off events. [2024-06-03 20:07:17,913 INFO L125 PetriNetUnfolderBase]: For 876755/876769 co-relation queries the response was YES. [2024-06-03 20:07:17,998 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. [2024-06-03 20:07:18,025 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 563 selfloop transitions, 87 changer transitions 0/653 dead transitions. [2024-06-03 20:07:18,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 653 transitions, 9466 flow [2024-06-03 20:07:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-03 20:07:18,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685636856368564 [2024-06-03 20:07:18,026 INFO L175 Difference]: Start difference. First operand has 449 places, 621 transitions, 7847 flow. Second operand 9 states and 136 transitions. [2024-06-03 20:07:18,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 653 transitions, 9466 flow [2024-06-03 20:07:20,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 653 transitions, 9232 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-03 20:07:20,761 INFO L231 Difference]: Finished difference. Result has 452 places, 634 transitions, 8078 flow [2024-06-03 20:07:20,762 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} [2024-06-03 20:07:20,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-03 20:07:20,762 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 634 transitions, 8078 flow [2024-06-03 20:07:20,762 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) [2024-06-03 20:07:20,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:20,762 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] [2024-06-03 20:07:20,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:07:20,763 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)] === [2024-06-03 20:07:20,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:20,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1687200876, now seen corresponding path program 4 times [2024-06-03 20:07:20,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:20,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572417643] [2024-06-03 20:07:20,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:20,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:21,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:21,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572417643] [2024-06-03 20:07:21,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572417643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:21,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:21,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:21,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446657527] [2024-06-03 20:07:21,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:21,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:21,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:21,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:21,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:21,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:21,870 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) [2024-06-03 20:07:21,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:21,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:21,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:24,132 INFO L124 PetriNetUnfolderBase]: 5192/7925 cut-off events. [2024-06-03 20:07:24,133 INFO L125 PetriNetUnfolderBase]: For 990546/990552 co-relation queries the response was YES. [2024-06-03 20:07:24,233 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. [2024-06-03 20:07:24,266 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 494 selfloop transitions, 184 changer transitions 0/681 dead transitions. [2024-06-03 20:07:24,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 681 transitions, 10780 flow [2024-06-03 20:07:24,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:24,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:07:24,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-03 20:07:24,268 INFO L175 Difference]: Start difference. First operand has 452 places, 634 transitions, 8078 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:07:24,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 681 transitions, 10780 flow [2024-06-03 20:07:27,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 681 transitions, 10552 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:27,860 INFO L231 Difference]: Finished difference. Result has 458 places, 650 transitions, 8895 flow [2024-06-03 20:07:27,860 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} [2024-06-03 20:07:27,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-03 20:07:27,861 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 650 transitions, 8895 flow [2024-06-03 20:07:27,861 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) [2024-06-03 20:07:27,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:27,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:27,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:07:27,861 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)] === [2024-06-03 20:07:27,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:27,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1222503464, now seen corresponding path program 5 times [2024-06-03 20:07:27,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:27,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21738616] [2024-06-03 20:07:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:27,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:28,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:28,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21738616] [2024-06-03 20:07:28,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21738616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:28,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:28,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:28,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564773087] [2024-06-03 20:07:28,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:28,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:28,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:28,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:28,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:28,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:28,977 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) [2024-06-03 20:07:28,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:28,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:28,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:31,225 INFO L124 PetriNetUnfolderBase]: 5244/7997 cut-off events. [2024-06-03 20:07:31,225 INFO L125 PetriNetUnfolderBase]: For 1047194/1047200 co-relation queries the response was YES. [2024-06-03 20:07:31,345 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. [2024-06-03 20:07:31,381 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 488 selfloop transitions, 193 changer transitions 0/684 dead transitions. [2024-06-03 20:07:31,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 684 transitions, 11320 flow [2024-06-03 20:07:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:31,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 20:07:31,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-03 20:07:31,383 INFO L175 Difference]: Start difference. First operand has 458 places, 650 transitions, 8895 flow. Second operand 9 states and 152 transitions. [2024-06-03 20:07:31,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 684 transitions, 11320 flow [2024-06-03 20:07:35,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 684 transitions, 10903 flow, removed 170 selfloop flow, removed 3 redundant places. [2024-06-03 20:07:35,496 INFO L231 Difference]: Finished difference. Result has 464 places, 656 transitions, 9121 flow [2024-06-03 20:07:35,497 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} [2024-06-03 20:07:35,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-03 20:07:35,497 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 656 transitions, 9121 flow [2024-06-03 20:07:35,497 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) [2024-06-03 20:07:35,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:35,498 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] [2024-06-03 20:07:35,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:07:35,498 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)] === [2024-06-03 20:07:35,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:35,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1223848582, now seen corresponding path program 6 times [2024-06-03 20:07:35,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:35,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482212786] [2024-06-03 20:07:35,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:35,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:36,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:36,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482212786] [2024-06-03 20:07:36,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482212786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:36,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:36,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:36,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313733982] [2024-06-03 20:07:36,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:36,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:36,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:36,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:36,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:36,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:36,603 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) [2024-06-03 20:07:36,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:36,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:36,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:38,716 INFO L124 PetriNetUnfolderBase]: 5248/7997 cut-off events. [2024-06-03 20:07:38,716 INFO L125 PetriNetUnfolderBase]: For 1030743/1030751 co-relation queries the response was YES. [2024-06-03 20:07:38,823 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. [2024-06-03 20:07:38,856 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 602 selfloop transitions, 81 changer transitions 0/686 dead transitions. [2024-06-03 20:07:38,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 686 transitions, 10931 flow [2024-06-03 20:07:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 20:07:38,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:07:38,858 INFO L175 Difference]: Start difference. First operand has 464 places, 656 transitions, 9121 flow. Second operand 9 states and 144 transitions. [2024-06-03 20:07:38,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 686 transitions, 10931 flow [2024-06-03 20:07:42,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 686 transitions, 10559 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:42,841 INFO L231 Difference]: Finished difference. Result has 469 places, 659 transitions, 9026 flow [2024-06-03 20:07:42,841 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} [2024-06-03 20:07:42,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-03 20:07:42,841 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 659 transitions, 9026 flow [2024-06-03 20:07:42,841 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) [2024-06-03 20:07:42,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:42,842 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] [2024-06-03 20:07:42,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:07:42,842 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)] === [2024-06-03 20:07:42,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:42,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1681509989, now seen corresponding path program 1 times [2024-06-03 20:07:42,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:42,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328382694] [2024-06-03 20:07:42,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:42,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:43,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:43,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328382694] [2024-06-03 20:07:43,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328382694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:43,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:43,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:43,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316948828] [2024-06-03 20:07:43,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:43,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:43,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:43,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:43,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:43,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:43,866 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) [2024-06-03 20:07:43,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:43,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:43,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:45,959 INFO L124 PetriNetUnfolderBase]: 5341/8127 cut-off events. [2024-06-03 20:07:45,959 INFO L125 PetriNetUnfolderBase]: For 1071367/1071375 co-relation queries the response was YES. [2024-06-03 20:07:46,070 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. [2024-06-03 20:07:46,105 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 581 selfloop transitions, 117 changer transitions 0/701 dead transitions. [2024-06-03 20:07:46,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 701 transitions, 11130 flow [2024-06-03 20:07:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 20:07:46,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-03 20:07:46,106 INFO L175 Difference]: Start difference. First operand has 469 places, 659 transitions, 9026 flow. Second operand 9 states and 145 transitions. [2024-06-03 20:07:46,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 701 transitions, 11130 flow [2024-06-03 20:07:50,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 701 transitions, 10971 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:50,151 INFO L231 Difference]: Finished difference. Result has 473 places, 676 transitions, 9543 flow [2024-06-03 20:07:50,151 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} [2024-06-03 20:07:50,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-03 20:07:50,152 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 676 transitions, 9543 flow [2024-06-03 20:07:50,152 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) [2024-06-03 20:07:50,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:50,152 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] [2024-06-03 20:07:50,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:07:50,153 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)] === [2024-06-03 20:07:50,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:50,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1228044404, now seen corresponding path program 7 times [2024-06-03 20:07:50,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:50,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3935788] [2024-06-03 20:07:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:50,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:51,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:51,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3935788] [2024-06-03 20:07:51,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3935788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:51,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:51,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:51,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368202874] [2024-06-03 20:07:51,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:51,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:51,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:51,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:51,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:51,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:51,182 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) [2024-06-03 20:07:51,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:51,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:51,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:53,593 INFO L124 PetriNetUnfolderBase]: 5361/8155 cut-off events. [2024-06-03 20:07:53,593 INFO L125 PetriNetUnfolderBase]: For 1097819/1097827 co-relation queries the response was YES. [2024-06-03 20:07:53,701 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. [2024-06-03 20:07:53,735 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 617 selfloop transitions, 84 changer transitions 0/704 dead transitions. [2024-06-03 20:07:53,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 704 transitions, 11389 flow [2024-06-03 20:07:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:53,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 20:07:53,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:07:53,736 INFO L175 Difference]: Start difference. First operand has 473 places, 676 transitions, 9543 flow. Second operand 9 states and 144 transitions. [2024-06-03 20:07:53,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 704 transitions, 11389 flow [2024-06-03 20:07:57,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 704 transitions, 11221 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-03 20:07:57,199 INFO L231 Difference]: Finished difference. Result has 478 places, 679 transitions, 9627 flow [2024-06-03 20:07:57,199 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} [2024-06-03 20:07:57,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-03 20:07:57,200 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 679 transitions, 9627 flow [2024-06-03 20:07:57,200 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) [2024-06-03 20:07:57,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:57,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:57,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:07:57,200 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)] === [2024-06-03 20:07:57,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:57,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1232693195, now seen corresponding path program 1 times [2024-06-03 20:07:57,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:57,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781452845] [2024-06-03 20:07:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:57,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:58,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:58,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781452845] [2024-06-03 20:07:58,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781452845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:58,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:58,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:58,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365077377] [2024-06-03 20:07:58,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:58,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:58,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:58,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:58,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:58,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:58,445 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) [2024-06-03 20:07:58,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:58,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:58,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:00,778 INFO L124 PetriNetUnfolderBase]: 5369/8167 cut-off events. [2024-06-03 20:08:00,779 INFO L125 PetriNetUnfolderBase]: For 1100921/1100929 co-relation queries the response was YES. [2024-06-03 20:08:00,898 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. [2024-06-03 20:08:00,937 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 644 selfloop transitions, 50 changer transitions 0/697 dead transitions. [2024-06-03 20:08:00,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 697 transitions, 11153 flow [2024-06-03 20:08:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:00,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-03 20:08:00,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-03 20:08:00,938 INFO L175 Difference]: Start difference. First operand has 478 places, 679 transitions, 9627 flow. Second operand 8 states and 121 transitions. [2024-06-03 20:08:00,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 697 transitions, 11153 flow [2024-06-03 20:08:05,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 697 transitions, 10967 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 20:08:05,308 INFO L231 Difference]: Finished difference. Result has 480 places, 681 transitions, 9625 flow [2024-06-03 20:08:05,308 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} [2024-06-03 20:08:05,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-03 20:08:05,308 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 681 transitions, 9625 flow [2024-06-03 20:08:05,309 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) [2024-06-03 20:08:05,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:05,309 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] [2024-06-03 20:08:05,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:08:05,309 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)] === [2024-06-03 20:08:05,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:05,309 INFO L85 PathProgramCache]: Analyzing trace with hash 375123236, now seen corresponding path program 8 times [2024-06-03 20:08:05,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:05,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509340456] [2024-06-03 20:08:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:05,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:06,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:06,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509340456] [2024-06-03 20:08:06,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509340456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:06,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:06,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:06,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453892367] [2024-06-03 20:08:06,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:06,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:06,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:06,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:06,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:06,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:06,420 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) [2024-06-03 20:08:06,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:06,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:06,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:08,680 INFO L124 PetriNetUnfolderBase]: 5389/8201 cut-off events. [2024-06-03 20:08:08,680 INFO L125 PetriNetUnfolderBase]: For 1132256/1132262 co-relation queries the response was YES. [2024-06-03 20:08:08,794 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. [2024-06-03 20:08:08,830 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 560 selfloop transitions, 144 changer transitions 0/707 dead transitions. [2024-06-03 20:08:08,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 707 transitions, 11481 flow [2024-06-03 20:08:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:08:08,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:08:08,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 20:08:08,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-03 20:08:08,831 INFO L175 Difference]: Start difference. First operand has 480 places, 681 transitions, 9625 flow. Second operand 9 states and 145 transitions. [2024-06-03 20:08:08,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 707 transitions, 11481 flow [2024-06-03 20:08:13,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 707 transitions, 11321 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 20:08:13,311 INFO L231 Difference]: Finished difference. Result has 483 places, 684 transitions, 9841 flow [2024-06-03 20:08:13,311 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} [2024-06-03 20:08:13,312 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-03 20:08:13,312 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 684 transitions, 9841 flow [2024-06-03 20:08:13,312 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) [2024-06-03 20:08:13,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:13,312 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] [2024-06-03 20:08:13,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:08:13,313 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)] === [2024-06-03 20:08:13,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:13,313 INFO L85 PathProgramCache]: Analyzing trace with hash 375129033, now seen corresponding path program 2 times [2024-06-03 20:08:13,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:13,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480719493] [2024-06-03 20:08:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:13,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:14,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:14,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480719493] [2024-06-03 20:08:14,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480719493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:14,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:14,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:14,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141498578] [2024-06-03 20:08:14,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:14,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:14,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:14,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:14,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:14,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:14,462 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) [2024-06-03 20:08:14,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:14,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:14,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:16,639 INFO L124 PetriNetUnfolderBase]: 5399/8209 cut-off events. [2024-06-03 20:08:16,639 INFO L125 PetriNetUnfolderBase]: For 1138184/1138192 co-relation queries the response was YES. [2024-06-03 20:08:16,760 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. [2024-06-03 20:08:16,797 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 645 selfloop transitions, 58 changer transitions 0/706 dead transitions. [2024-06-03 20:08:16,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 706 transitions, 11456 flow [2024-06-03 20:08:16,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:08:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:08:16,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-03 20:08:16,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 20:08:16,799 INFO L175 Difference]: Start difference. First operand has 483 places, 684 transitions, 9841 flow. Second operand 9 states and 135 transitions. [2024-06-03 20:08:16,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 706 transitions, 11456 flow [2024-06-03 20:08:21,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 706 transitions, 11114 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-03 20:08:21,165 INFO L231 Difference]: Finished difference. Result has 485 places, 688 transitions, 9748 flow [2024-06-03 20:08:21,165 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} [2024-06-03 20:08:21,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-03 20:08:21,166 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 688 transitions, 9748 flow [2024-06-03 20:08:21,166 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) [2024-06-03 20:08:21,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:21,166 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] [2024-06-03 20:08:21,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:08:21,166 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)] === [2024-06-03 20:08:21,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:21,167 INFO L85 PathProgramCache]: Analyzing trace with hash 2131729392, now seen corresponding path program 9 times [2024-06-03 20:08:21,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:21,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064127666] [2024-06-03 20:08:21,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:21,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:22,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:22,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064127666] [2024-06-03 20:08:22,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064127666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:22,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:22,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:22,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436520190] [2024-06-03 20:08:22,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:22,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:22,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:22,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:22,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:22,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:22,131 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) [2024-06-03 20:08:22,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:22,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:22,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:24,367 INFO L124 PetriNetUnfolderBase]: 5419/8237 cut-off events. [2024-06-03 20:08:24,368 INFO L125 PetriNetUnfolderBase]: For 1168045/1168053 co-relation queries the response was YES. [2024-06-03 20:08:24,484 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. [2024-06-03 20:08:24,520 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 652 selfloop transitions, 55 changer transitions 0/710 dead transitions. [2024-06-03 20:08:24,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 710 transitions, 11349 flow [2024-06-03 20:08:24,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:08:24,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:08:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-03 20:08:24,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 20:08:24,521 INFO L175 Difference]: Start difference. First operand has 485 places, 688 transitions, 9748 flow. Second operand 9 states and 135 transitions. [2024-06-03 20:08:24,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 710 transitions, 11349 flow [2024-06-03 20:08:29,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 710 transitions, 11149 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-03 20:08:29,387 INFO L231 Difference]: Finished difference. Result has 487 places, 691 transitions, 9751 flow [2024-06-03 20:08:29,387 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} [2024-06-03 20:08:29,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-03 20:08:29,387 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 691 transitions, 9751 flow [2024-06-03 20:08:29,388 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) [2024-06-03 20:08:29,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:29,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:29,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:08:29,388 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)] === [2024-06-03 20:08:29,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash -333048153, now seen corresponding path program 1 times [2024-06-03 20:08:29,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:29,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935091352] [2024-06-03 20:08:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:29,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:30,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:30,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935091352] [2024-06-03 20:08:30,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935091352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:30,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:30,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:30,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021122089] [2024-06-03 20:08:30,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:30,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:30,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:30,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:30,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:30,519 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) [2024-06-03 20:08:30,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:30,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:30,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:33,059 INFO L124 PetriNetUnfolderBase]: 5416/8233 cut-off events. [2024-06-03 20:08:33,059 INFO L125 PetriNetUnfolderBase]: For 1161834/1161842 co-relation queries the response was YES. [2024-06-03 20:08:33,168 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. [2024-06-03 20:08:33,202 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 648 selfloop transitions, 53 changer transitions 0/704 dead transitions. [2024-06-03 20:08:33,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 704 transitions, 11287 flow [2024-06-03 20:08:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:08:33,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:08:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-03 20:08:33,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693379790940767 [2024-06-03 20:08:33,203 INFO L175 Difference]: Start difference. First operand has 487 places, 691 transitions, 9751 flow. Second operand 7 states and 106 transitions. [2024-06-03 20:08:33,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 704 transitions, 11287 flow [2024-06-03 20:08:37,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 704 transitions, 11121 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-03 20:08:37,872 INFO L231 Difference]: Finished difference. Result has 487 places, 693 transitions, 9795 flow [2024-06-03 20:08:37,872 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} [2024-06-03 20:08:37,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-03 20:08:37,873 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 693 transitions, 9795 flow [2024-06-03 20:08:37,873 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) [2024-06-03 20:08:37,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:37,873 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] [2024-06-03 20:08:37,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:08:37,874 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)] === [2024-06-03 20:08:37,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:37,874 INFO L85 PathProgramCache]: Analyzing trace with hash -341322115, now seen corresponding path program 2 times [2024-06-03 20:08:37,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:37,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450030543] [2024-06-03 20:08:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:37,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:38,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:38,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450030543] [2024-06-03 20:08:38,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450030543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:38,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:38,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:38,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375982520] [2024-06-03 20:08:38,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:38,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:38,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:38,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:38,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:38,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:38,876 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) [2024-06-03 20:08:38,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:38,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:38,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:41,212 INFO L124 PetriNetUnfolderBase]: 5424/8245 cut-off events. [2024-06-03 20:08:41,212 INFO L125 PetriNetUnfolderBase]: For 1186072/1186080 co-relation queries the response was YES. [2024-06-03 20:08:41,335 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. [2024-06-03 20:08:41,371 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 671 selfloop transitions, 32 changer transitions 0/706 dead transitions. [2024-06-03 20:08:41,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 706 transitions, 11317 flow [2024-06-03 20:08:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:08:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:08:41,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-03 20:08:41,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-03 20:08:41,373 INFO L175 Difference]: Start difference. First operand has 487 places, 693 transitions, 9795 flow. Second operand 7 states and 104 transitions. [2024-06-03 20:08:41,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 706 transitions, 11317 flow [2024-06-03 20:08:46,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 706 transitions, 11043 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-03 20:08:46,677 INFO L231 Difference]: Finished difference. Result has 487 places, 695 transitions, 9673 flow [2024-06-03 20:08:46,678 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} [2024-06-03 20:08:46,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-03 20:08:46,678 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 695 transitions, 9673 flow [2024-06-03 20:08:46,678 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) [2024-06-03 20:08:46,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:46,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:46,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:08:46,679 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)] === [2024-06-03 20:08:46,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:46,679 INFO L85 PathProgramCache]: Analyzing trace with hash -332751235, now seen corresponding path program 3 times [2024-06-03 20:08:46,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:46,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174104845] [2024-06-03 20:08:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:46,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:47,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:47,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174104845] [2024-06-03 20:08:47,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174104845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:47,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:47,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:47,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044039199] [2024-06-03 20:08:47,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:47,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:47,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:47,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:47,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:47,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:47,667 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) [2024-06-03 20:08:47,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:47,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:47,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:49,932 INFO L124 PetriNetUnfolderBase]: 5432/8257 cut-off events. [2024-06-03 20:08:49,932 INFO L125 PetriNetUnfolderBase]: For 1190038/1190046 co-relation queries the response was YES. [2024-06-03 20:08:50,056 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. [2024-06-03 20:08:50,095 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 668 selfloop transitions, 37 changer transitions 0/708 dead transitions. [2024-06-03 20:08:50,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 708 transitions, 11191 flow [2024-06-03 20:08:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:08:50,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:08:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-03 20:08:50,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-03 20:08:50,096 INFO L175 Difference]: Start difference. First operand has 487 places, 695 transitions, 9673 flow. Second operand 7 states and 104 transitions. [2024-06-03 20:08:50,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 708 transitions, 11191 flow [2024-06-03 20:08:54,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 708 transitions, 11063 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 20:08:54,358 INFO L231 Difference]: Finished difference. Result has 489 places, 697 transitions, 9711 flow [2024-06-03 20:08:54,359 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} [2024-06-03 20:08:54,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-03 20:08:54,359 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 697 transitions, 9711 flow [2024-06-03 20:08:54,359 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) [2024-06-03 20:08:54,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:54,360 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] [2024-06-03 20:08:54,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:08:54,360 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)] === [2024-06-03 20:08:54,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:54,360 INFO L85 PathProgramCache]: Analyzing trace with hash -345144291, now seen corresponding path program 3 times [2024-06-03 20:08:54,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:54,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792007958] [2024-06-03 20:08:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:54,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:55,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:55,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792007958] [2024-06-03 20:08:55,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792007958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:55,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:55,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:55,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914436754] [2024-06-03 20:08:55,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:55,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:55,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:55,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:55,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:55,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:55,411 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) [2024-06-03 20:08:55,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:55,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:55,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:57,662 INFO L124 PetriNetUnfolderBase]: 5426/8255 cut-off events. [2024-06-03 20:08:57,663 INFO L125 PetriNetUnfolderBase]: For 1194439/1194445 co-relation queries the response was YES. [2024-06-03 20:08:57,783 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. [2024-06-03 20:08:57,820 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 625 selfloop transitions, 80 changer transitions 0/708 dead transitions. [2024-06-03 20:08:57,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 708 transitions, 11171 flow [2024-06-03 20:08:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:08:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:08:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-03 20:08:57,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-03 20:08:57,821 INFO L175 Difference]: Start difference. First operand has 489 places, 697 transitions, 9711 flow. Second operand 7 states and 110 transitions. [2024-06-03 20:08:57,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 708 transitions, 11171 flow [2024-06-03 20:09:02,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 708 transitions, 10975 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-03 20:09:02,910 INFO L231 Difference]: Finished difference. Result has 491 places, 697 transitions, 9687 flow [2024-06-03 20:09:02,910 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} [2024-06-03 20:09:02,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-03 20:09:02,910 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 697 transitions, 9687 flow [2024-06-03 20:09:02,910 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) [2024-06-03 20:09:02,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:02,911 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] [2024-06-03 20:09:02,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:09:02,911 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)] === [2024-06-03 20:09:02,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:02,911 INFO L85 PathProgramCache]: Analyzing trace with hash -341329059, now seen corresponding path program 3 times [2024-06-03 20:09:02,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:02,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674409219] [2024-06-03 20:09:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:02,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:04,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:04,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674409219] [2024-06-03 20:09:04,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674409219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:04,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:04,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:04,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62146759] [2024-06-03 20:09:04,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:04,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:04,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:04,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:04,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:04,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:04,090 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) [2024-06-03 20:09:04,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:04,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:04,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:06,383 INFO L124 PetriNetUnfolderBase]: 5420/8241 cut-off events. [2024-06-03 20:09:06,384 INFO L125 PetriNetUnfolderBase]: For 1195594/1195602 co-relation queries the response was YES. [2024-06-03 20:09:06,515 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. [2024-06-03 20:09:06,791 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 670 selfloop transitions, 40 changer transitions 0/713 dead transitions. [2024-06-03 20:09:06,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 713 transitions, 11289 flow [2024-06-03 20:09:06,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:06,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-03 20:09:06,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-03 20:09:06,792 INFO L175 Difference]: Start difference. First operand has 491 places, 697 transitions, 9687 flow. Second operand 8 states and 118 transitions. [2024-06-03 20:09:06,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 713 transitions, 11289 flow [2024-06-03 20:09:11,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 713 transitions, 11086 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:09:11,025 INFO L231 Difference]: Finished difference. Result has 492 places, 700 transitions, 9694 flow [2024-06-03 20:09:11,025 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} [2024-06-03 20:09:11,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-03 20:09:11,025 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 700 transitions, 9694 flow [2024-06-03 20:09:11,026 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) [2024-06-03 20:09:11,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:11,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:11,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:09:11,026 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)] === [2024-06-03 20:09:11,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:11,027 INFO L85 PathProgramCache]: Analyzing trace with hash -950991918, now seen corresponding path program 10 times [2024-06-03 20:09:11,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:11,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683276225] [2024-06-03 20:09:11,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:11,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:12,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:12,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683276225] [2024-06-03 20:09:12,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683276225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:12,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:12,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:12,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746288246] [2024-06-03 20:09:12,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:12,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:12,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:12,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:12,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:12,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:12,094 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) [2024-06-03 20:09:12,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:12,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:12,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:14,382 INFO L124 PetriNetUnfolderBase]: 5408/8225 cut-off events. [2024-06-03 20:09:14,382 INFO L125 PetriNetUnfolderBase]: For 1181813/1181821 co-relation queries the response was YES. [2024-06-03 20:09:14,503 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. [2024-06-03 20:09:14,538 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 674 selfloop transitions, 37 changer transitions 0/714 dead transitions. [2024-06-03 20:09:14,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 714 transitions, 11196 flow [2024-06-03 20:09:14,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:14,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-03 20:09:14,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-03 20:09:14,540 INFO L175 Difference]: Start difference. First operand has 492 places, 700 transitions, 9694 flow. Second operand 8 states and 118 transitions. [2024-06-03 20:09:14,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 714 transitions, 11196 flow [2024-06-03 20:09:18,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 714 transitions, 10970 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:19,005 INFO L231 Difference]: Finished difference. Result has 494 places, 700 transitions, 9548 flow [2024-06-03 20:09:19,005 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} [2024-06-03 20:09:19,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-03 20:09:19,006 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 700 transitions, 9548 flow [2024-06-03 20:09:19,006 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) [2024-06-03 20:09:19,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:19,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:19,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:09:19,006 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)] === [2024-06-03 20:09:19,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:19,007 INFO L85 PathProgramCache]: Analyzing trace with hash -341334856, now seen corresponding path program 11 times [2024-06-03 20:09:19,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:19,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483600239] [2024-06-03 20:09:19,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:19,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:19,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:19,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483600239] [2024-06-03 20:09:19,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483600239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:19,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:19,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:19,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466104739] [2024-06-03 20:09:19,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:19,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:19,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:19,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:19,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:20,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:20,022 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) [2024-06-03 20:09:20,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:20,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:20,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:22,261 INFO L124 PetriNetUnfolderBase]: 5396/8215 cut-off events. [2024-06-03 20:09:22,261 INFO L125 PetriNetUnfolderBase]: For 1169030/1169036 co-relation queries the response was YES. [2024-06-03 20:09:22,380 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. [2024-06-03 20:09:22,416 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 610 selfloop transitions, 104 changer transitions 0/717 dead transitions. [2024-06-03 20:09:22,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 717 transitions, 11324 flow [2024-06-03 20:09:22,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:22,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 20:09:22,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-03 20:09:22,417 INFO L175 Difference]: Start difference. First operand has 494 places, 700 transitions, 9548 flow. Second operand 8 states and 126 transitions. [2024-06-03 20:09:22,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 717 transitions, 11324 flow [2024-06-03 20:09:27,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 717 transitions, 11190 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:27,764 INFO L231 Difference]: Finished difference. Result has 496 places, 700 transitions, 9628 flow [2024-06-03 20:09:27,764 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} [2024-06-03 20:09:27,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-03 20:09:27,765 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 700 transitions, 9628 flow [2024-06-03 20:09:27,765 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) [2024-06-03 20:09:27,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:27,765 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] [2024-06-03 20:09:27,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:09:27,765 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)] === [2024-06-03 20:09:27,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:27,765 INFO L85 PathProgramCache]: Analyzing trace with hash -344786799, now seen corresponding path program 2 times [2024-06-03 20:09:27,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:27,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671681481] [2024-06-03 20:09:27,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:27,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:28,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:28,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671681481] [2024-06-03 20:09:28,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671681481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:28,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:28,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:28,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592864951] [2024-06-03 20:09:28,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:28,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:28,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:28,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:28,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:28,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:28,726 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) [2024-06-03 20:09:28,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:28,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:28,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:30,928 INFO L124 PetriNetUnfolderBase]: 5398/8218 cut-off events. [2024-06-03 20:09:30,928 INFO L125 PetriNetUnfolderBase]: For 1164373/1164379 co-relation queries the response was YES. [2024-06-03 20:09:31,051 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. [2024-06-03 20:09:31,087 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 631 selfloop transitions, 80 changer transitions 0/714 dead transitions. [2024-06-03 20:09:31,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 714 transitions, 11216 flow [2024-06-03 20:09:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:09:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:09:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-03 20:09:31,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-03 20:09:31,088 INFO L175 Difference]: Start difference. First operand has 496 places, 700 transitions, 9628 flow. Second operand 7 states and 109 transitions. [2024-06-03 20:09:31,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 714 transitions, 11216 flow [2024-06-03 20:09:35,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 714 transitions, 10996 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:35,911 INFO L231 Difference]: Finished difference. Result has 497 places, 703 transitions, 9702 flow [2024-06-03 20:09:35,911 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} [2024-06-03 20:09:35,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-03 20:09:35,911 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 703 transitions, 9702 flow [2024-06-03 20:09:35,911 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) [2024-06-03 20:09:35,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:35,912 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] [2024-06-03 20:09:35,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:09:35,912 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)] === [2024-06-03 20:09:35,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:35,912 INFO L85 PathProgramCache]: Analyzing trace with hash -954716568, now seen corresponding path program 12 times [2024-06-03 20:09:35,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:35,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630613122] [2024-06-03 20:09:35,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:35,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:36,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:36,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630613122] [2024-06-03 20:09:36,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630613122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:36,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:36,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:36,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468298087] [2024-06-03 20:09:36,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:36,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:36,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:36,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:36,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:36,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:36,888 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) [2024-06-03 20:09:36,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:36,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:36,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:39,074 INFO L124 PetriNetUnfolderBase]: 5386/8202 cut-off events. [2024-06-03 20:09:39,075 INFO L125 PetriNetUnfolderBase]: For 1164724/1164730 co-relation queries the response was YES. [2024-06-03 20:09:39,197 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. [2024-06-03 20:09:39,233 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 634 selfloop transitions, 80 changer transitions 0/717 dead transitions. [2024-06-03 20:09:39,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 717 transitions, 11208 flow [2024-06-03 20:09:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-03 20:09:39,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-03 20:09:39,235 INFO L175 Difference]: Start difference. First operand has 497 places, 703 transitions, 9702 flow. Second operand 8 states and 122 transitions. [2024-06-03 20:09:39,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 717 transitions, 11208 flow [2024-06-03 20:09:44,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 717 transitions, 10926 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-03 20:09:44,546 INFO L231 Difference]: Finished difference. Result has 500 places, 703 transitions, 9586 flow [2024-06-03 20:09:44,547 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} [2024-06-03 20:09:44,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-03 20:09:44,547 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 703 transitions, 9586 flow [2024-06-03 20:09:44,547 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) [2024-06-03 20:09:44,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:44,547 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] [2024-06-03 20:09:44,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:09:44,548 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)] === [2024-06-03 20:09:44,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:44,548 INFO L85 PathProgramCache]: Analyzing trace with hash -942710547, now seen corresponding path program 4 times [2024-06-03 20:09:44,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:44,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658408261] [2024-06-03 20:09:44,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:44,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:45,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:45,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658408261] [2024-06-03 20:09:45,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658408261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:45,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:45,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:45,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520314943] [2024-06-03 20:09:45,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:45,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:45,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:45,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:45,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:45,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:45,558 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) [2024-06-03 20:09:45,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:45,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:45,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:47,850 INFO L124 PetriNetUnfolderBase]: 5394/8208 cut-off events. [2024-06-03 20:09:47,850 INFO L125 PetriNetUnfolderBase]: For 1165976/1165984 co-relation queries the response was YES. [2024-06-03 20:09:47,975 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. [2024-06-03 20:09:48,010 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 664 selfloop transitions, 49 changer transitions 0/716 dead transitions. [2024-06-03 20:09:48,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 716 transitions, 11136 flow [2024-06-03 20:09:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:09:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:09:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-03 20:09:48,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 20:09:48,012 INFO L175 Difference]: Start difference. First operand has 500 places, 703 transitions, 9586 flow. Second operand 7 states and 105 transitions. [2024-06-03 20:09:48,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 716 transitions, 11136 flow [2024-06-03 20:09:52,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 716 transitions, 10944 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:09:52,554 INFO L231 Difference]: Finished difference. Result has 500 places, 705 transitions, 9594 flow [2024-06-03 20:09:52,555 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} [2024-06-03 20:09:52,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-03 20:09:52,555 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 705 transitions, 9594 flow [2024-06-03 20:09:52,555 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) [2024-06-03 20:09:52,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:52,556 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] [2024-06-03 20:09:52,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:09:52,556 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)] === [2024-06-03 20:09:52,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:52,556 INFO L85 PathProgramCache]: Analyzing trace with hash -858396757, now seen corresponding path program 4 times [2024-06-03 20:09:52,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:52,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429840274] [2024-06-03 20:09:52,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:52,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:53,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:53,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429840274] [2024-06-03 20:09:53,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429840274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:53,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:53,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:53,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326380256] [2024-06-03 20:09:53,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:53,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:53,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:53,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:53,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:53,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:53,783 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) [2024-06-03 20:09:53,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:53,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:53,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:56,053 INFO L124 PetriNetUnfolderBase]: 5404/8222 cut-off events. [2024-06-03 20:09:56,053 INFO L125 PetriNetUnfolderBase]: For 1185268/1185276 co-relation queries the response was YES. [2024-06-03 20:09:56,180 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. [2024-06-03 20:09:56,217 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 654 selfloop transitions, 73 changer transitions 0/730 dead transitions. [2024-06-03 20:09:56,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 730 transitions, 11262 flow [2024-06-03 20:09:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-03 20:09:56,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-03 20:09:56,219 INFO L175 Difference]: Start difference. First operand has 500 places, 705 transitions, 9594 flow. Second operand 9 states and 137 transitions. [2024-06-03 20:09:56,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 730 transitions, 11262 flow [2024-06-03 20:10:00,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 730 transitions, 11094 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-03 20:10:00,723 INFO L231 Difference]: Finished difference. Result has 504 places, 708 transitions, 9712 flow [2024-06-03 20:10:00,723 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} [2024-06-03 20:10:00,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-03 20:10:00,723 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 708 transitions, 9712 flow [2024-06-03 20:10:00,723 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) [2024-06-03 20:10:00,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:00,724 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] [2024-06-03 20:10:00,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:10:00,724 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)] === [2024-06-03 20:10:00,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:00,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1929954380, now seen corresponding path program 13 times [2024-06-03 20:10:00,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:00,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349962461] [2024-06-03 20:10:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:00,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:01,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:01,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349962461] [2024-06-03 20:10:01,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349962461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:01,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:01,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:01,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345301764] [2024-06-03 20:10:01,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:01,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:01,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:01,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:01,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:01,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:01,809 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) [2024-06-03 20:10:01,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:01,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:01,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:04,539 INFO L124 PetriNetUnfolderBase]: 5683/8612 cut-off events. [2024-06-03 20:10:04,539 INFO L125 PetriNetUnfolderBase]: For 1418712/1418720 co-relation queries the response was YES. [2024-06-03 20:10:04,664 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. [2024-06-03 20:10:04,702 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 618 selfloop transitions, 152 changer transitions 0/773 dead transitions. [2024-06-03 20:10:04,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 773 transitions, 12603 flow [2024-06-03 20:10:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:10:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:10:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-03 20:10:04,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-03 20:10:04,704 INFO L175 Difference]: Start difference. First operand has 504 places, 708 transitions, 9712 flow. Second operand 11 states and 184 transitions. [2024-06-03 20:10:04,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 773 transitions, 12603 flow [2024-06-03 20:10:09,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 773 transitions, 12341 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-03 20:10:09,907 INFO L231 Difference]: Finished difference. Result has 510 places, 737 transitions, 10496 flow [2024-06-03 20:10:09,907 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} [2024-06-03 20:10:09,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-03 20:10:09,910 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 737 transitions, 10496 flow [2024-06-03 20:10:09,911 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) [2024-06-03 20:10:09,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:09,911 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] [2024-06-03 20:10:09,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:10:09,911 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)] === [2024-06-03 20:10:09,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:09,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1929626090, now seen corresponding path program 14 times [2024-06-03 20:10:09,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:09,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791491727] [2024-06-03 20:10:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:09,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:10,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:10,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791491727] [2024-06-03 20:10:10,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791491727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:10,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:10,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:10,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055066336] [2024-06-03 20:10:10,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:10,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:10,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:10,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:10,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:11,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:11,075 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) [2024-06-03 20:10:11,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:11,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:11,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:13,559 INFO L124 PetriNetUnfolderBase]: 5655/8576 cut-off events. [2024-06-03 20:10:13,560 INFO L125 PetriNetUnfolderBase]: For 1358997/1359005 co-relation queries the response was YES. [2024-06-03 20:10:13,695 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. [2024-06-03 20:10:13,734 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 616 selfloop transitions, 145 changer transitions 0/764 dead transitions. [2024-06-03 20:10:13,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 764 transitions, 12406 flow [2024-06-03 20:10:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:10:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:10:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 20:10:13,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-03 20:10:13,735 INFO L175 Difference]: Start difference. First operand has 510 places, 737 transitions, 10496 flow. Second operand 9 states and 151 transitions. [2024-06-03 20:10:13,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 764 transitions, 12406 flow [2024-06-03 20:10:19,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 764 transitions, 11920 flow, removed 214 selfloop flow, removed 5 redundant places. [2024-06-03 20:10:19,481 INFO L231 Difference]: Finished difference. Result has 514 places, 737 transitions, 10312 flow [2024-06-03 20:10:19,482 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} [2024-06-03 20:10:19,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-03 20:10:19,482 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 737 transitions, 10312 flow [2024-06-03 20:10:19,482 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) [2024-06-03 20:10:19,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:19,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:19,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:10:19,483 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)] === [2024-06-03 20:10:19,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:19,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1631980046, now seen corresponding path program 15 times [2024-06-03 20:10:19,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:19,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106378392] [2024-06-03 20:10:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:19,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:20,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:20,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106378392] [2024-06-03 20:10:20,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106378392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:20,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:20,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:20,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701277919] [2024-06-03 20:10:20,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:20,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:20,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:20,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:20,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:20,621 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) [2024-06-03 20:10:20,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:20,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:20,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:23,152 INFO L124 PetriNetUnfolderBase]: 5707/8654 cut-off events. [2024-06-03 20:10:23,153 INFO L125 PetriNetUnfolderBase]: For 1335190/1335196 co-relation queries the response was YES. [2024-06-03 20:10:23,283 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. [2024-06-03 20:10:23,320 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 706 selfloop transitions, 69 changer transitions 0/778 dead transitions. [2024-06-03 20:10:23,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 778 transitions, 12558 flow [2024-06-03 20:10:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:10:23,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:10:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-03 20:10:23,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37915742793791574 [2024-06-03 20:10:23,321 INFO L175 Difference]: Start difference. First operand has 514 places, 737 transitions, 10312 flow. Second operand 11 states and 171 transitions. [2024-06-03 20:10:23,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 778 transitions, 12558 flow [2024-06-03 20:10:29,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 778 transitions, 12268 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:10:29,250 INFO L231 Difference]: Finished difference. Result has 517 places, 743 transitions, 10424 flow [2024-06-03 20:10:29,251 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} [2024-06-03 20:10:29,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 475 predicate places. [2024-06-03 20:10:29,251 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 743 transitions, 10424 flow [2024-06-03 20:10:29,251 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) [2024-06-03 20:10:29,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:29,251 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] [2024-06-03 20:10:29,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:10:29,252 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)] === [2024-06-03 20:10:29,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:29,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1626300536, now seen corresponding path program 16 times [2024-06-03 20:10:29,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:29,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707515103] [2024-06-03 20:10:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:29,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:30,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:30,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707515103] [2024-06-03 20:10:30,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707515103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:30,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:30,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:30,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188779328] [2024-06-03 20:10:30,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:30,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:30,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:30,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:30,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:30,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:30,294 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) [2024-06-03 20:10:30,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:30,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:30,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:33,016 INFO L124 PetriNetUnfolderBase]: 5759/8720 cut-off events. [2024-06-03 20:10:33,016 INFO L125 PetriNetUnfolderBase]: For 1398964/1398972 co-relation queries the response was YES. [2024-06-03 20:10:33,136 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. [2024-06-03 20:10:33,170 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 728 selfloop transitions, 49 changer transitions 0/780 dead transitions. [2024-06-03 20:10:33,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 780 transitions, 12650 flow [2024-06-03 20:10:33,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:10:33,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:10:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-03 20:10:33,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-03 20:10:33,172 INFO L175 Difference]: Start difference. First operand has 517 places, 743 transitions, 10424 flow. Second operand 10 states and 155 transitions. [2024-06-03 20:10:33,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 780 transitions, 12650 flow [2024-06-03 20:10:40,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 780 transitions, 12374 flow, removed 93 selfloop flow, removed 8 redundant places. [2024-06-03 20:10:40,104 INFO L231 Difference]: Finished difference. Result has 519 places, 749 transitions, 10522 flow [2024-06-03 20:10:40,109 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} [2024-06-03 20:10:40,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 477 predicate places. [2024-06-03 20:10:40,109 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 749 transitions, 10522 flow [2024-06-03 20:10:40,109 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) [2024-06-03 20:10:40,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:40,109 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] [2024-06-03 20:10:40,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 20:10:40,110 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)] === [2024-06-03 20:10:40,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:40,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1631830316, now seen corresponding path program 17 times [2024-06-03 20:10:40,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:40,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777913649] [2024-06-03 20:10:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:40,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:41,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:41,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777913649] [2024-06-03 20:10:41,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777913649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:41,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:41,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:41,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883730776] [2024-06-03 20:10:41,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:41,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:41,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:41,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:41,251 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) [2024-06-03 20:10:41,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:41,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:41,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:43,744 INFO L124 PetriNetUnfolderBase]: 5779/8754 cut-off events. [2024-06-03 20:10:43,745 INFO L125 PetriNetUnfolderBase]: For 1419551/1419557 co-relation queries the response was YES. [2024-06-03 20:10:43,883 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. [2024-06-03 20:10:43,923 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 717 selfloop transitions, 63 changer transitions 0/783 dead transitions. [2024-06-03 20:10:43,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 783 transitions, 12332 flow [2024-06-03 20:10:43,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:10:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:10:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-03 20:10:43,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36807095343680707 [2024-06-03 20:10:43,925 INFO L175 Difference]: Start difference. First operand has 519 places, 749 transitions, 10522 flow. Second operand 11 states and 166 transitions. [2024-06-03 20:10:43,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 783 transitions, 12332 flow [2024-06-03 20:10:50,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 783 transitions, 12099 flow, removed 92 selfloop flow, removed 6 redundant places. [2024-06-03 20:10:50,016 INFO L231 Difference]: Finished difference. Result has 524 places, 752 transitions, 10499 flow [2024-06-03 20:10:50,016 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} [2024-06-03 20:10:50,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 482 predicate places. [2024-06-03 20:10:50,017 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 752 transitions, 10499 flow [2024-06-03 20:10:50,017 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) [2024-06-03 20:10:50,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:50,017 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] [2024-06-03 20:10:50,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 20:10:50,017 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)] === [2024-06-03 20:10:50,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:50,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1626289376, now seen corresponding path program 18 times [2024-06-03 20:10:50,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:50,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568626683] [2024-06-03 20:10:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:50,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:51,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:51,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568626683] [2024-06-03 20:10:51,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568626683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:51,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:51,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:51,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828605681] [2024-06-03 20:10:51,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:51,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:51,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:51,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:51,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:51,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:51,120 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) [2024-06-03 20:10:51,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:51,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:51,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:53,819 INFO L124 PetriNetUnfolderBase]: 5799/8776 cut-off events. [2024-06-03 20:10:53,819 INFO L125 PetriNetUnfolderBase]: For 1434795/1434803 co-relation queries the response was YES. [2024-06-03 20:10:53,943 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. [2024-06-03 20:10:53,978 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 730 selfloop transitions, 51 changer transitions 0/784 dead transitions. [2024-06-03 20:10:53,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 784 transitions, 12555 flow [2024-06-03 20:10:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:10:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:10:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-03 20:10:53,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-03 20:10:53,980 INFO L175 Difference]: Start difference. First operand has 524 places, 752 transitions, 10499 flow. Second operand 10 states and 154 transitions. [2024-06-03 20:10:53,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 784 transitions, 12555 flow [2024-06-03 20:11:00,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 784 transitions, 12373 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-03 20:11:00,093 INFO L231 Difference]: Finished difference. Result has 525 places, 755 transitions, 10505 flow [2024-06-03 20:11:00,093 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} [2024-06-03 20:11:00,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-03 20:11:00,093 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 755 transitions, 10505 flow [2024-06-03 20:11:00,093 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) [2024-06-03 20:11:00,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:00,094 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] [2024-06-03 20:11:00,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 20:11:00,094 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)] === [2024-06-03 20:11:00,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:00,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1929625873, now seen corresponding path program 5 times [2024-06-03 20:11:00,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:00,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696726786] [2024-06-03 20:11:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:00,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:01,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:01,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696726786] [2024-06-03 20:11:01,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696726786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:01,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:01,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:01,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502243040] [2024-06-03 20:11:01,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:01,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:01,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:01,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:01,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:01,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:01,213 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) [2024-06-03 20:11:01,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:01,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:01,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:03,716 INFO L124 PetriNetUnfolderBase]: 5819/8804 cut-off events. [2024-06-03 20:11:03,717 INFO L125 PetriNetUnfolderBase]: For 1452755/1452763 co-relation queries the response was YES. [2024-06-03 20:11:03,849 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. [2024-06-03 20:11:03,887 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 695 selfloop transitions, 86 changer transitions 0/784 dead transitions. [2024-06-03 20:11:03,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 784 transitions, 12641 flow [2024-06-03 20:11:03,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:11:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:11:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-03 20:11:03,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-03 20:11:03,888 INFO L175 Difference]: Start difference. First operand has 525 places, 755 transitions, 10505 flow. Second operand 9 states and 143 transitions. [2024-06-03 20:11:03,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 784 transitions, 12641 flow [2024-06-03 20:11:09,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 784 transitions, 12487 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-03 20:11:09,051 INFO L231 Difference]: Finished difference. Result has 528 places, 760 transitions, 10749 flow [2024-06-03 20:11:09,052 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} [2024-06-03 20:11:09,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-03 20:11:09,052 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 760 transitions, 10749 flow [2024-06-03 20:11:09,052 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) [2024-06-03 20:11:09,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:09,053 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] [2024-06-03 20:11:09,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 20:11:09,053 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)] === [2024-06-03 20:11:09,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:09,053 INFO L85 PathProgramCache]: Analyzing trace with hash -404626931, now seen corresponding path program 6 times [2024-06-03 20:11:09,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:09,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462366779] [2024-06-03 20:11:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:09,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:10,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:10,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462366779] [2024-06-03 20:11:10,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462366779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:10,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:10,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:10,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527177245] [2024-06-03 20:11:10,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:10,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:10,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:10,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:10,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:10,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:10,185 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) [2024-06-03 20:11:10,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:10,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:10,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:12,822 INFO L124 PetriNetUnfolderBase]: 5871/8876 cut-off events. [2024-06-03 20:11:12,822 INFO L125 PetriNetUnfolderBase]: For 1518086/1518094 co-relation queries the response was YES. [2024-06-03 20:11:12,954 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. [2024-06-03 20:11:12,991 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 734 selfloop transitions, 58 changer transitions 0/795 dead transitions. [2024-06-03 20:11:12,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 795 transitions, 13071 flow [2024-06-03 20:11:12,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:11:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:11:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-03 20:11:12,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-03 20:11:12,993 INFO L175 Difference]: Start difference. First operand has 528 places, 760 transitions, 10749 flow. Second operand 10 states and 154 transitions. [2024-06-03 20:11:12,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 795 transitions, 13071 flow [2024-06-03 20:11:19,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 795 transitions, 12833 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:19,939 INFO L231 Difference]: Finished difference. Result has 533 places, 766 transitions, 10919 flow [2024-06-03 20:11:19,939 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} [2024-06-03 20:11:19,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-03 20:11:19,940 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 766 transitions, 10919 flow [2024-06-03 20:11:19,940 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) [2024-06-03 20:11:19,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:19,940 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] [2024-06-03 20:11:19,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 20:11:19,940 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)] === [2024-06-03 20:11:19,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1545574003, now seen corresponding path program 7 times [2024-06-03 20:11:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:19,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508952823] [2024-06-03 20:11:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:21,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:21,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508952823] [2024-06-03 20:11:21,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508952823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:21,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:21,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:21,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115017034] [2024-06-03 20:11:21,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:21,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:21,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:21,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:21,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:21,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:21,163 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) [2024-06-03 20:11:21,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:21,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:21,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:23,621 INFO L124 PetriNetUnfolderBase]: 5905/8923 cut-off events. [2024-06-03 20:11:23,622 INFO L125 PetriNetUnfolderBase]: For 1561111/1561119 co-relation queries the response was YES. [2024-06-03 20:11:23,774 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. [2024-06-03 20:11:23,816 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 652 selfloop transitions, 152 changer transitions 0/807 dead transitions. [2024-06-03 20:11:23,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 807 transitions, 13897 flow [2024-06-03 20:11:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:11:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:11:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 20:11:23,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:11:23,817 INFO L175 Difference]: Start difference. First operand has 533 places, 766 transitions, 10919 flow. Second operand 9 states and 144 transitions. [2024-06-03 20:11:23,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 807 transitions, 13897 flow [2024-06-03 20:11:30,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 807 transitions, 13454 flow, removed 157 selfloop flow, removed 7 redundant places. [2024-06-03 20:11:31,006 INFO L231 Difference]: Finished difference. Result has 537 places, 783 transitions, 11613 flow [2024-06-03 20:11:31,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10600, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11613, PETRI_PLACES=537, PETRI_TRANSITIONS=783} [2024-06-03 20:11:31,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 495 predicate places. [2024-06-03 20:11:31,006 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 783 transitions, 11613 flow [2024-06-03 20:11:31,007 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) [2024-06-03 20:11:31,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:31,007 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] [2024-06-03 20:11:31,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 20:11:31,007 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:31,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:31,008 INFO L85 PathProgramCache]: Analyzing trace with hash -399978357, now seen corresponding path program 5 times [2024-06-03 20:11:31,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:31,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876169519] [2024-06-03 20:11:31,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:31,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:32,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:32,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876169519] [2024-06-03 20:11:32,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876169519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:32,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:32,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:32,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885012548] [2024-06-03 20:11:32,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:32,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:32,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:32,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:32,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:32,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:32,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 783 transitions, 11613 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) [2024-06-03 20:11:32,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:32,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:32,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:34,865 INFO L124 PetriNetUnfolderBase]: 5913/8935 cut-off events. [2024-06-03 20:11:34,865 INFO L125 PetriNetUnfolderBase]: For 1583718/1583726 co-relation queries the response was YES. [2024-06-03 20:11:35,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87453 conditions, 8935 events. 5913/8935 cut-off events. For 1583718/1583726 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 52863 event pairs, 1123 based on Foata normal form. 10/8944 useless extension candidates. Maximal degree in co-relation 87205. Up to 8842 conditions per place. [2024-06-03 20:11:35,050 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 766 selfloop transitions, 34 changer transitions 0/803 dead transitions. [2024-06-03 20:11:35,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 803 transitions, 13369 flow [2024-06-03 20:11:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:35,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-03 20:11:35,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-03 20:11:35,052 INFO L175 Difference]: Start difference. First operand has 537 places, 783 transitions, 11613 flow. Second operand 8 states and 119 transitions. [2024-06-03 20:11:35,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 803 transitions, 13369 flow [2024-06-03 20:11:42,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 803 transitions, 13072 flow, removed 99 selfloop flow, removed 4 redundant places. [2024-06-03 20:11:42,836 INFO L231 Difference]: Finished difference. Result has 541 places, 785 transitions, 11487 flow [2024-06-03 20:11:42,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11316, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11487, PETRI_PLACES=541, PETRI_TRANSITIONS=785} [2024-06-03 20:11:42,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 499 predicate places. [2024-06-03 20:11:42,836 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 785 transitions, 11487 flow [2024-06-03 20:11:42,836 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) [2024-06-03 20:11:42,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:42,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:42,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 20:11:42,837 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:42,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:42,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1527463938, now seen corresponding path program 19 times [2024-06-03 20:11:42,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:42,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456703352] [2024-06-03 20:11:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:42,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:43,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:43,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456703352] [2024-06-03 20:11:43,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456703352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:43,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:43,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:43,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035795399] [2024-06-03 20:11:43,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:43,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:43,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:43,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:43,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:43,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:43,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 785 transitions, 11487 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) [2024-06-03 20:11:43,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:43,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:43,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:46,524 INFO L124 PetriNetUnfolderBase]: 5965/9007 cut-off events. [2024-06-03 20:11:46,525 INFO L125 PetriNetUnfolderBase]: For 1666147/1666155 co-relation queries the response was YES. [2024-06-03 20:11:46,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89156 conditions, 9007 events. 5965/9007 cut-off events. For 1666147/1666155 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 53281 event pairs, 993 based on Foata normal form. 12/9018 useless extension candidates. Maximal degree in co-relation 88906. Up to 8390 conditions per place. [2024-06-03 20:11:46,732 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 676 selfloop transitions, 142 changer transitions 0/821 dead transitions. [2024-06-03 20:11:46,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 821 transitions, 13857 flow [2024-06-03 20:11:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:11:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:11:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 20:11:46,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-03 20:11:46,733 INFO L175 Difference]: Start difference. First operand has 541 places, 785 transitions, 11487 flow. Second operand 9 states and 145 transitions. [2024-06-03 20:11:46,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 821 transitions, 13857 flow [2024-06-03 20:11:54,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 821 transitions, 13694 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-03 20:11:54,760 INFO L231 Difference]: Finished difference. Result has 545 places, 795 transitions, 11974 flow [2024-06-03 20:11:54,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11324, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11974, PETRI_PLACES=545, PETRI_TRANSITIONS=795} [2024-06-03 20:11:54,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 503 predicate places. [2024-06-03 20:11:54,761 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 795 transitions, 11974 flow [2024-06-03 20:11:54,761 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) [2024-06-03 20:11:54,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:54,761 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] [2024-06-03 20:11:54,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 20:11:54,762 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:54,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:54,762 INFO L85 PathProgramCache]: Analyzing trace with hash -399991098, now seen corresponding path program 20 times [2024-06-03 20:11:54,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:54,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903886831] [2024-06-03 20:11:54,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:54,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:55,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:55,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903886831] [2024-06-03 20:11:55,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903886831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:55,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:55,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:55,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879689380] [2024-06-03 20:11:55,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:55,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:55,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:55,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:55,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:56,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:56,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 795 transitions, 11974 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) [2024-06-03 20:11:56,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:56,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:56,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:58,980 INFO L124 PetriNetUnfolderBase]: 6147/9269 cut-off events. [2024-06-03 20:11:58,981 INFO L125 PetriNetUnfolderBase]: For 1822269/1822275 co-relation queries the response was YES. [2024-06-03 20:11:59,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94593 conditions, 9269 events. 6147/9269 cut-off events. For 1822269/1822275 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 54751 event pairs, 985 based on Foata normal form. 10/9278 useless extension candidates. Maximal degree in co-relation 94341. Up to 7467 conditions per place. [2024-06-03 20:11:59,181 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 584 selfloop transitions, 253 changer transitions 0/840 dead transitions. [2024-06-03 20:11:59,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 840 transitions, 14762 flow [2024-06-03 20:11:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:11:59,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:11:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 20:11:59,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-03 20:11:59,205 INFO L175 Difference]: Start difference. First operand has 545 places, 795 transitions, 11974 flow. Second operand 9 states and 156 transitions. [2024-06-03 20:11:59,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 840 transitions, 14762 flow [2024-06-03 20:12:07,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 840 transitions, 14470 flow, removed 114 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:07,961 INFO L231 Difference]: Finished difference. Result has 551 places, 810 transitions, 12596 flow [2024-06-03 20:12:07,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11682, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12596, PETRI_PLACES=551, PETRI_TRANSITIONS=810} [2024-06-03 20:12:07,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 509 predicate places. [2024-06-03 20:12:07,962 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 810 transitions, 12596 flow [2024-06-03 20:12:07,962 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) [2024-06-03 20:12:07,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:07,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:07,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 20:12:07,962 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:07,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:07,963 INFO L85 PathProgramCache]: Analyzing trace with hash -854195017, now seen corresponding path program 8 times [2024-06-03 20:12:07,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:07,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978489924] [2024-06-03 20:12:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:07,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:09,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:09,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978489924] [2024-06-03 20:12:09,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978489924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:09,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:09,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:09,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881417307] [2024-06-03 20:12:09,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:09,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:09,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:09,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:09,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:09,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:09,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 810 transitions, 12596 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) [2024-06-03 20:12:09,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:09,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:09,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:12,429 INFO L124 PetriNetUnfolderBase]: 6141/9255 cut-off events. [2024-06-03 20:12:12,430 INFO L125 PetriNetUnfolderBase]: For 1815024/1815032 co-relation queries the response was YES. [2024-06-03 20:12:12,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95729 conditions, 9255 events. 6141/9255 cut-off events. For 1815024/1815032 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 54807 event pairs, 1042 based on Foata normal form. 10/9264 useless extension candidates. Maximal degree in co-relation 95474. Up to 8719 conditions per place. [2024-06-03 20:12:12,594 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 680 selfloop transitions, 151 changer transitions 0/834 dead transitions. [2024-06-03 20:12:12,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 834 transitions, 14685 flow [2024-06-03 20:12:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:12,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:12,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-03 20:12:12,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-03 20:12:12,595 INFO L175 Difference]: Start difference. First operand has 551 places, 810 transitions, 12596 flow. Second operand 9 states and 143 transitions. [2024-06-03 20:12:12,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 834 transitions, 14685 flow [2024-06-03 20:12:20,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 834 transitions, 14421 flow, removed 119 selfloop flow, removed 3 redundant places. [2024-06-03 20:12:20,754 INFO L231 Difference]: Finished difference. Result has 557 places, 811 transitions, 12673 flow [2024-06-03 20:12:20,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12358, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12673, PETRI_PLACES=557, PETRI_TRANSITIONS=811} [2024-06-03 20:12:20,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 515 predicate places. [2024-06-03 20:12:20,759 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 811 transitions, 12673 flow [2024-06-03 20:12:20,759 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) [2024-06-03 20:12:20,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:20,759 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] [2024-06-03 20:12:20,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 20:12:20,759 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:20,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:20,760 INFO L85 PathProgramCache]: Analyzing trace with hash 101162111, now seen corresponding path program 9 times [2024-06-03 20:12:20,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:20,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514269413] [2024-06-03 20:12:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:20,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:21,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:21,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514269413] [2024-06-03 20:12:21,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514269413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:21,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:21,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:21,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174800234] [2024-06-03 20:12:21,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:21,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:21,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:21,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:21,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:21,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:21,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 811 transitions, 12673 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) [2024-06-03 20:12:21,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:21,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:21,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:25,360 INFO L124 PetriNetUnfolderBase]: 6135/9247 cut-off events. [2024-06-03 20:12:25,360 INFO L125 PetriNetUnfolderBase]: For 1813224/1813232 co-relation queries the response was YES. [2024-06-03 20:12:25,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95147 conditions, 9247 events. 6135/9247 cut-off events. For 1813224/1813232 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 54735 event pairs, 1175 based on Foata normal form. 10/9256 useless extension candidates. Maximal degree in co-relation 94891. Up to 9144 conditions per place. [2024-06-03 20:12:25,553 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 791 selfloop transitions, 38 changer transitions 0/832 dead transitions. [2024-06-03 20:12:25,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 832 transitions, 14458 flow [2024-06-03 20:12:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-03 20:12:25,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-03 20:12:25,555 INFO L175 Difference]: Start difference. First operand has 557 places, 811 transitions, 12673 flow. Second operand 9 states and 132 transitions. [2024-06-03 20:12:25,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 832 transitions, 14458 flow [2024-06-03 20:12:33,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 832 transitions, 14161 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:12:33,556 INFO L231 Difference]: Finished difference. Result has 560 places, 812 transitions, 12497 flow [2024-06-03 20:12:33,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12378, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=773, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12497, PETRI_PLACES=560, PETRI_TRANSITIONS=812} [2024-06-03 20:12:33,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 518 predicate places. [2024-06-03 20:12:33,557 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 812 transitions, 12497 flow [2024-06-03 20:12:33,557 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) [2024-06-03 20:12:33,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:33,557 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] [2024-06-03 20:12:33,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 20:12:33,557 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:33,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:33,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1621647746, now seen corresponding path program 21 times [2024-06-03 20:12:33,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:33,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398677124] [2024-06-03 20:12:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:33,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:34,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:34,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398677124] [2024-06-03 20:12:34,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398677124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:34,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:34,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:34,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827751223] [2024-06-03 20:12:34,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:34,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:34,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:34,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:34,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:34,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:34,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 812 transitions, 12497 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) [2024-06-03 20:12:34,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:34,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:34,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:38,077 INFO L124 PetriNetUnfolderBase]: 6123/9231 cut-off events. [2024-06-03 20:12:38,077 INFO L125 PetriNetUnfolderBase]: For 1813386/1813394 co-relation queries the response was YES. [2024-06-03 20:12:38,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94189 conditions, 9231 events. 6123/9231 cut-off events. For 1813386/1813394 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 54641 event pairs, 1183 based on Foata normal form. 12/9242 useless extension candidates. Maximal degree in co-relation 93932. Up to 9120 conditions per place. [2024-06-03 20:12:38,270 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 792 selfloop transitions, 38 changer transitions 0/833 dead transitions. [2024-06-03 20:12:38,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 833 transitions, 14259 flow [2024-06-03 20:12:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:38,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-03 20:12:38,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-03 20:12:38,272 INFO L175 Difference]: Start difference. First operand has 560 places, 812 transitions, 12497 flow. Second operand 9 states and 133 transitions. [2024-06-03 20:12:38,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 833 transitions, 14259 flow [2024-06-03 20:12:46,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 833 transitions, 14019 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:46,260 INFO L231 Difference]: Finished difference. Result has 562 places, 812 transitions, 12339 flow [2024-06-03 20:12:46,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12257, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=774, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12339, PETRI_PLACES=562, PETRI_TRANSITIONS=812} [2024-06-03 20:12:46,261 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 520 predicate places. [2024-06-03 20:12:46,261 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 812 transitions, 12339 flow [2024-06-03 20:12:46,261 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) [2024-06-03 20:12:46,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:46,261 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] [2024-06-03 20:12:46,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 20:12:46,261 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:46,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:46,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1387546485, now seen corresponding path program 6 times [2024-06-03 20:12:46,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:46,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162907213] [2024-06-03 20:12:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:46,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:47,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:47,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162907213] [2024-06-03 20:12:47,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162907213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:47,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:47,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:47,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437923469] [2024-06-03 20:12:47,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:47,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:47,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:47,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:47,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:47,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:47,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 812 transitions, 12339 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) [2024-06-03 20:12:47,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:47,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:47,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:50,520 INFO L124 PetriNetUnfolderBase]: 6131/9243 cut-off events. [2024-06-03 20:12:50,521 INFO L125 PetriNetUnfolderBase]: For 1818730/1818738 co-relation queries the response was YES. [2024-06-03 20:12:50,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94263 conditions, 9243 events. 6131/9243 cut-off events. For 1818730/1818738 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 54766 event pairs, 1092 based on Foata normal form. 10/9252 useless extension candidates. Maximal degree in co-relation 94005. Up to 9084 conditions per place. [2024-06-03 20:12:50,710 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 769 selfloop transitions, 59 changer transitions 0/831 dead transitions. [2024-06-03 20:12:50,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 831 transitions, 14173 flow [2024-06-03 20:12:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:12:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:12:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-03 20:12:50,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-03 20:12:50,712 INFO L175 Difference]: Start difference. First operand has 562 places, 812 transitions, 12339 flow. Second operand 8 states and 121 transitions. [2024-06-03 20:12:50,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 831 transitions, 14173 flow [2024-06-03 20:12:58,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 831 transitions, 14093 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:58,934 INFO L231 Difference]: Finished difference. Result has 563 places, 814 transitions, 12484 flow [2024-06-03 20:12:58,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12259, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12484, PETRI_PLACES=563, PETRI_TRANSITIONS=814} [2024-06-03 20:12:58,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 521 predicate places. [2024-06-03 20:12:58,934 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 814 transitions, 12484 flow [2024-06-03 20:12:58,935 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) [2024-06-03 20:12:58,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:58,935 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] [2024-06-03 20:12:58,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 20:12:58,935 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:58,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:58,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1387553646, now seen corresponding path program 22 times [2024-06-03 20:12:58,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:58,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994595341] [2024-06-03 20:12:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:58,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:59,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:59,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994595341] [2024-06-03 20:12:59,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994595341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:59,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:59,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:59,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677171446] [2024-06-03 20:12:59,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:59,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:59,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:59,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:00,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:00,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 814 transitions, 12484 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) [2024-06-03 20:13:00,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:00,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:00,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:03,281 INFO L124 PetriNetUnfolderBase]: 6151/9271 cut-off events. [2024-06-03 20:13:03,282 INFO L125 PetriNetUnfolderBase]: For 1866032/1866040 co-relation queries the response was YES. [2024-06-03 20:13:03,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94965 conditions, 9271 events. 6151/9271 cut-off events. For 1866032/1866040 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 54856 event pairs, 1088 based on Foata normal form. 12/9282 useless extension candidates. Maximal degree in co-relation 94706. Up to 9094 conditions per place. [2024-06-03 20:13:03,481 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 771 selfloop transitions, 63 changer transitions 0/837 dead transitions. [2024-06-03 20:13:03,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 837 transitions, 14388 flow [2024-06-03 20:13:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-03 20:13:03,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 20:13:03,482 INFO L175 Difference]: Start difference. First operand has 563 places, 814 transitions, 12484 flow. Second operand 9 states and 135 transitions. [2024-06-03 20:13:03,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 837 transitions, 14388 flow [2024-06-03 20:13:12,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 837 transitions, 14179 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-03 20:13:12,188 INFO L231 Difference]: Finished difference. Result has 566 places, 817 transitions, 12529 flow [2024-06-03 20:13:12,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12275, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12529, PETRI_PLACES=566, PETRI_TRANSITIONS=817} [2024-06-03 20:13:12,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 524 predicate places. [2024-06-03 20:13:12,189 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 817 transitions, 12529 flow [2024-06-03 20:13:12,189 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) [2024-06-03 20:13:12,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:12,189 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] [2024-06-03 20:13:12,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-03 20:13:12,189 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:12,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:12,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1593035277, now seen corresponding path program 10 times [2024-06-03 20:13:12,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:12,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763308365] [2024-06-03 20:13:12,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:12,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:13,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:13,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763308365] [2024-06-03 20:13:13,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763308365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:13,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:13,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:13,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717247737] [2024-06-03 20:13:13,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:13,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:13,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:13,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:13,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:13,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 817 transitions, 12529 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) [2024-06-03 20:13:13,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:13,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:13,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:16,509 INFO L124 PetriNetUnfolderBase]: 6161/9285 cut-off events. [2024-06-03 20:13:16,509 INFO L125 PetriNetUnfolderBase]: For 1869770/1869778 co-relation queries the response was YES. [2024-06-03 20:13:16,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95275 conditions, 9285 events. 6161/9285 cut-off events. For 1869770/1869778 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 55025 event pairs, 1082 based on Foata normal form. 10/9294 useless extension candidates. Maximal degree in co-relation 95015. Up to 9116 conditions per place. [2024-06-03 20:13:16,697 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 773 selfloop transitions, 63 changer transitions 0/839 dead transitions. [2024-06-03 20:13:16,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 839 transitions, 14454 flow [2024-06-03 20:13:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-03 20:13:16,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-03 20:13:16,699 INFO L175 Difference]: Start difference. First operand has 566 places, 817 transitions, 12529 flow. Second operand 9 states and 134 transitions. [2024-06-03 20:13:16,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 839 transitions, 14454 flow [2024-06-03 20:13:25,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 839 transitions, 14228 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-03 20:13:25,806 INFO L231 Difference]: Finished difference. Result has 568 places, 820 transitions, 12586 flow [2024-06-03 20:13:25,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12303, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12586, PETRI_PLACES=568, PETRI_TRANSITIONS=820} [2024-06-03 20:13:25,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 526 predicate places. [2024-06-03 20:13:25,807 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 820 transitions, 12586 flow [2024-06-03 20:13:25,807 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) [2024-06-03 20:13:25,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:25,807 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] [2024-06-03 20:13:25,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-03 20:13:25,808 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:25,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:25,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1277359886, now seen corresponding path program 23 times [2024-06-03 20:13:25,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:25,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731610622] [2024-06-03 20:13:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:25,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:26,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:26,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731610622] [2024-06-03 20:13:26,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731610622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:26,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:26,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:26,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385154211] [2024-06-03 20:13:26,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:26,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:26,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:26,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:26,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:26,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:26,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 820 transitions, 12586 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) [2024-06-03 20:13:26,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:26,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:26,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:30,257 INFO L124 PetriNetUnfolderBase]: 6181/9313 cut-off events. [2024-06-03 20:13:30,257 INFO L125 PetriNetUnfolderBase]: For 1914373/1914381 co-relation queries the response was YES. [2024-06-03 20:13:30,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95596 conditions, 9313 events. 6181/9313 cut-off events. For 1914373/1914381 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 55177 event pairs, 1090 based on Foata normal form. 12/9324 useless extension candidates. Maximal degree in co-relation 95335. Up to 9056 conditions per place. [2024-06-03 20:13:30,422 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 761 selfloop transitions, 80 changer transitions 0/844 dead transitions. [2024-06-03 20:13:30,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 844 transitions, 14522 flow [2024-06-03 20:13:30,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-03 20:13:30,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-03 20:13:30,424 INFO L175 Difference]: Start difference. First operand has 568 places, 820 transitions, 12586 flow. Second operand 9 states and 138 transitions. [2024-06-03 20:13:30,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 844 transitions, 14522 flow