./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 20:13:42,715 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:13:42,769 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:13:42,773 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:13:42,773 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:13:42,792 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:13:42,793 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:13:42,793 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:13:42,794 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:13:42,797 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:13:42,797 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:13:42,797 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:13:42,799 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:13:42,800 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:13:42,800 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:13:42,800 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:13:42,800 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:13:42,801 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:13:42,801 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:13:42,801 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:13:42,801 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:13:42,802 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:13:42,802 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:13:42,802 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:13:42,802 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:13:42,802 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:13:42,803 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:13:42,803 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:13:42,803 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:13:42,804 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:13:42,804 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:13:42,805 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:13:42,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:13:42,805 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:13:42,805 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:13:42,806 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:13:42,806 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:13:42,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:13:42,806 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:13:42,807 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:13:42,807 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:13:42,807 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:13:42,807 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:13:42,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:13:42,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:13:42,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:13:42,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:13:42,991 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:13:42,992 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:13:42,993 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:13:44,032 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:13:44,250 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:13:44,250 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:13:44,267 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdc357435/12f48df510904653a9112cafba51980f/FLAGed9c46fb9 [2024-06-03 20:13:44,276 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdc357435/12f48df510904653a9112cafba51980f [2024-06-03 20:13:44,278 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:13:44,278 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:13:44,279 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-03 20:13:44,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:13:44,419 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:13:44,420 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:13:44,420 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:13:44,423 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:13:44,424 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:13:44" (1/2) ... [2024-06-03 20:13:44,425 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ffaba12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:13:44, skipping insertion in model container [2024-06-03 20:13:44,425 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:13:44" (1/2) ... [2024-06-03 20:13:44,426 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f2ebb7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:13:44, skipping insertion in model container [2024-06-03 20:13:44,426 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:13:44" (2/2) ... [2024-06-03 20:13:44,427 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ffaba12 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:44, skipping insertion in model container [2024-06-03 20:13:44,427 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:13:44" (2/2) ... [2024-06-03 20:13:44,427 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:13:44,511 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:13:44,512 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((! 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 || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! 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$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-03 20:13:44,513 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((0 <= y$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_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! 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))) [2024-06-03 20:13:44,513 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] (((((((((((((((((! 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 || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! 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$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-03 20:13:44,513 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:13:44,513 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-03 20:13:44,550 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:13:44,869 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:13:44,884 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:13:44,988 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:13:45,025 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:13:45,025 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:45 WrapperNode [2024-06-03 20:13:45,025 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:13:45,027 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:13:45,027 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:13:45,027 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:13:45,032 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 08:13:45" (1/1) ... [2024-06-03 20:13:45,061 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 08:13:45" (1/1) ... [2024-06-03 20:13:45,089 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-03 20:13:45,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:13:45,090 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:13:45,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:13:45,090 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:13:45,098 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 08:13:45" (1/1) ... [2024-06-03 20:13:45,099 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 08:13:45" (1/1) ... [2024-06-03 20:13:45,106 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 08:13:45" (1/1) ... [2024-06-03 20:13:45,121 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 20:13:45,121 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 08:13:45" (1/1) ... [2024-06-03 20:13:45,121 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 08:13:45" (1/1) ... [2024-06-03 20:13:45,129 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 08:13:45" (1/1) ... [2024-06-03 20:13:45,131 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 08:13:45" (1/1) ... [2024-06-03 20:13:45,132 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 08:13:45" (1/1) ... [2024-06-03 20:13:45,134 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 08:13:45" (1/1) ... [2024-06-03 20:13:45,137 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:13:45,141 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:13:45,141 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:13:45,141 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:13:45,142 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 08:13:45" (1/1) ... [2024-06-03 20:13:45,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:13:45,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:13:45,197 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 20:13:45,216 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 20:13:45,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:13:45,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:13:45,230 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:13:45,230 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:13:45,231 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:13:45,231 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:13:45,231 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:13:45,231 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:13:45,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:13:45,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:13:45,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:13:45,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:13:45,233 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 20:13:45,352 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:13:45,354 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:13:45,691 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:13:45,691 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:13:45,929 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:13:45,929 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:13:45,930 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:13:45 BoogieIcfgContainer [2024-06-03 20:13:45,930 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:13:45,932 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:13:45,932 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:13:45,934 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:13:45,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:13:44" (1/4) ... [2024-06-03 20:13:45,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3bca88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:13:45, skipping insertion in model container [2024-06-03 20:13:45,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:13:44" (2/4) ... [2024-06-03 20:13:45,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3bca88 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:13:45, skipping insertion in model container [2024-06-03 20:13:45,936 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 08:13:45" (3/4) ... [2024-06-03 20:13:45,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3bca88 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:13:45, skipping insertion in model container [2024-06-03 20:13:45,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:13:45" (4/4) ... [2024-06-03 20:13:45,937 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:13:45,949 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:13:45,950 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:13:45,950 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:13:45,990 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:13:46,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:13:46,044 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-03 20:13:46,045 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:13:46,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 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. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:13:46,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:13:46,049 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-03 20:13:46,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:13:46,064 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;@41749673, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:13:46,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:13:46,069 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:13:46,070 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-03 20:13:46,070 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:13:46,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:46,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:13:46,071 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 20:13:46,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:46,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1004483788, now seen corresponding path program 1 times [2024-06-03 20:13:46,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:46,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502284981] [2024-06-03 20:13:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:46,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:47,016 INFO 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 20:13:47,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:47,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502284981] [2024-06-03 20:13:47,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502284981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:47,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:47,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:13:47,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154313011] [2024-06-03 20:13:47,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:47,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:13:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:47,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:13:47,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:13:47,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:13:47,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:47,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:47,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:13:47,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:47,532 INFO L124 PetriNetUnfolderBase]: 1656/2484 cut-off events. [2024-06-03 20:13:47,532 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-06-03 20:13:47,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5069 conditions, 2484 events. 1656/2484 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11839 event pairs, 955 based on Foata normal form. 3/2438 useless extension candidates. Maximal degree in co-relation 5054. Up to 2464 conditions per place. [2024-06-03 20:13:47,548 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-03 20:13:47,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 187 flow [2024-06-03 20:13:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:13:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:13:47,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-03 20:13:47,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:13:47,559 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-03 20:13:47,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 187 flow [2024-06-03 20:13:47,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:13:47,565 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-03 20:13:47,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-03 20:13:47,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-03 20:13:47,570 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-03 20:13:47,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:47,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:47,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:47,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:13:47,571 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 20:13:47,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:47,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1058700245, now seen corresponding path program 1 times [2024-06-03 20:13:47,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:47,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060604368] [2024-06-03 20:13:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:47,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:48,233 INFO 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 20:13:48,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:48,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060604368] [2024-06-03 20:13:48,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060604368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:48,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:48,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:13:48,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874187297] [2024-06-03 20:13:48,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:48,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:13:48,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:48,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:13:48,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:13:48,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:13:48,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:48,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:48,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:13:48,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:48,623 INFO L124 PetriNetUnfolderBase]: 1644/2466 cut-off events. [2024-06-03 20:13:48,623 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2024-06-03 20:13:48,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 2466 events. 1644/2466 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11350 event pairs, 941 based on Foata normal form. 6/2471 useless extension candidates. Maximal degree in co-relation 5652. Up to 2422 conditions per place. [2024-06-03 20:13:48,633 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-03 20:13:48,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 266 flow [2024-06-03 20:13:48,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:13:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:13:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-03 20:13:48,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-03 20:13:48,637 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 89 transitions. [2024-06-03 20:13:48,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 266 flow [2024-06-03 20:13:48,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:13:48,640 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2024-06-03 20:13:48,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-03 20:13:48,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-03 20:13:48,641 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2024-06-03 20:13:48,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:48,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:48,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:48,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:13:48,642 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 20:13:48,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:48,643 INFO L85 PathProgramCache]: Analyzing trace with hash 496336778, now seen corresponding path program 1 times [2024-06-03 20:13:48,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:48,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174643760] [2024-06-03 20:13:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:48,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:49,911 INFO 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 20:13:49,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:49,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174643760] [2024-06-03 20:13:49,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174643760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:49,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:49,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:13:49,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449021305] [2024-06-03 20:13:49,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:49,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:13:49,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:49,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:13:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:13:49,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:13:49,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:49,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:49,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:13:49,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:50,396 INFO L124 PetriNetUnfolderBase]: 1632/2448 cut-off events. [2024-06-03 20:13:50,397 INFO L125 PetriNetUnfolderBase]: For 1179/1187 co-relation queries the response was YES. [2024-06-03 20:13:50,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6249 conditions, 2448 events. 1632/2448 cut-off events. For 1179/1187 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11325 event pairs, 691 based on Foata normal form. 12/2459 useless extension candidates. Maximal degree in co-relation 6231. Up to 2374 conditions per place. [2024-06-03 20:13:50,408 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-06-03 20:13:50,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 68 transitions, 352 flow [2024-06-03 20:13:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:13:50,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:13:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-06-03 20:13:50,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2024-06-03 20:13:50,413 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 5 states and 109 transitions. [2024-06-03 20:13:50,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 68 transitions, 352 flow [2024-06-03 20:13:50,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 350 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-03 20:13:50,416 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 200 flow [2024-06-03 20:13:50,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-03 20:13:50,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-03 20:13:50,418 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 200 flow [2024-06-03 20:13:50,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:50,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:50,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:50,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:13:50,419 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 20:13:50,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:50,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1943845815, now seen corresponding path program 1 times [2024-06-03 20:13:50,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:50,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038430214] [2024-06-03 20:13:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:50,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:51,087 INFO 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 20:13:51,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:51,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038430214] [2024-06-03 20:13:51,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038430214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:51,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:51,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:13:51,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814143186] [2024-06-03 20:13:51,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:51,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:13:51,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:51,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:13:51,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:13:51,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 20:13:51,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:51,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:51,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 20:13:51,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:51,526 INFO L124 PetriNetUnfolderBase]: 1637/2455 cut-off events. [2024-06-03 20:13:51,526 INFO L125 PetriNetUnfolderBase]: For 2150/2158 co-relation queries the response was YES. [2024-06-03 20:13:51,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6885 conditions, 2455 events. 1637/2455 cut-off events. For 2150/2158 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11211 event pairs, 881 based on Foata normal form. 10/2464 useless extension candidates. Maximal degree in co-relation 6864. Up to 2426 conditions per place. [2024-06-03 20:13:51,540 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 49 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-03 20:13:51,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 360 flow [2024-06-03 20:13:51,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:13:51,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:13:51,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-03 20:13:51,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:13:51,542 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 200 flow. Second operand 5 states and 90 transitions. [2024-06-03 20:13:51,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 360 flow [2024-06-03 20:13:51,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 61 transitions, 338 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 20:13:51,545 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 218 flow [2024-06-03 20:13:51,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-03 20:13:51,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-03 20:13:51,546 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 218 flow [2024-06-03 20:13:51,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:51,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:51,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:51,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:13:51,547 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:51,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:51,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1490748477, now seen corresponding path program 1 times [2024-06-03 20:13:51,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:51,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432244401] [2024-06-03 20:13:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:51,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:53,104 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 20:13:53,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:53,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432244401] [2024-06-03 20:13:53,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432244401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:53,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:53,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:13:53,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717330922] [2024-06-03 20:13:53,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:53,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:13:53,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:53,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:13:53,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:13:53,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:13:53,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 218 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 20:13:53,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:53,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:13:53,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:53,667 INFO L124 PetriNetUnfolderBase]: 1628/2440 cut-off events. [2024-06-03 20:13:53,667 INFO L125 PetriNetUnfolderBase]: For 2998/3006 co-relation queries the response was YES. [2024-06-03 20:13:53,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7380 conditions, 2440 events. 1628/2440 cut-off events. For 2998/3006 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11102 event pairs, 541 based on Foata normal form. 12/2451 useless extension candidates. Maximal degree in co-relation 7357. Up to 2336 conditions per place. [2024-06-03 20:13:53,678 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 61 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-03 20:13:53,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 77 transitions, 440 flow [2024-06-03 20:13:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:13:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:13:53,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-03 20:13:53,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-03 20:13:53,680 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 218 flow. Second operand 6 states and 124 transitions. [2024-06-03 20:13:53,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 77 transitions, 440 flow [2024-06-03 20:13:53,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 424 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 20:13:53,686 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 243 flow [2024-06-03 20:13:53,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-03 20:13:53,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-03 20:13:53,688 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 243 flow [2024-06-03 20:13:53,689 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 20:13:53,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:53,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:53,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:13:53,693 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 20:13:53,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash -129676794, now seen corresponding path program 1 times [2024-06-03 20:13:53,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:53,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111136613] [2024-06-03 20:13:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:53,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:54,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:54,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111136613] [2024-06-03 20:13:54,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111136613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:54,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:54,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:13:54,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337458753] [2024-06-03 20:13:54,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:54,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:13:54,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:54,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:13:54,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:13:54,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:13:54,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 243 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:54,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:54,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:13:54,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:54,909 INFO L124 PetriNetUnfolderBase]: 1897/2824 cut-off events. [2024-06-03 20:13:54,909 INFO L125 PetriNetUnfolderBase]: For 4861/4861 co-relation queries the response was YES. [2024-06-03 20:13:54,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8913 conditions, 2824 events. 1897/2824 cut-off events. For 4861/4861 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12882 event pairs, 1022 based on Foata normal form. 2/2826 useless extension candidates. Maximal degree in co-relation 8890. Up to 2793 conditions per place. [2024-06-03 20:13:54,924 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-06-03 20:13:54,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 464 flow [2024-06-03 20:13:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:13:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:13:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-03 20:13:54,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-03 20:13:54,926 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 243 flow. Second operand 6 states and 97 transitions. [2024-06-03 20:13:54,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 464 flow [2024-06-03 20:13:54,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 73 transitions, 429 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:13:54,929 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 303 flow [2024-06-03 20:13:54,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-03 20:13:54,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-03 20:13:54,930 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 303 flow [2024-06-03 20:13:54,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:54,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:54,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:54,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:13:54,930 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 20:13:54,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:54,931 INFO L85 PathProgramCache]: Analyzing trace with hash -287765952, now seen corresponding path program 1 times [2024-06-03 20:13:54,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:54,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442358759] [2024-06-03 20:13:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:54,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:55,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:55,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442358759] [2024-06-03 20:13:55,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442358759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:55,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:55,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:13:55,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246309321] [2024-06-03 20:13:55,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:55,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:13:55,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:55,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:13:55,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:13:55,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 20:13:55,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:55,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:55,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 20:13:55,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:56,041 INFO L124 PetriNetUnfolderBase]: 1827/2736 cut-off events. [2024-06-03 20:13:56,041 INFO L125 PetriNetUnfolderBase]: For 6668/6710 co-relation queries the response was YES. [2024-06-03 20:13:56,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9339 conditions, 2736 events. 1827/2736 cut-off events. For 6668/6710 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12551 event pairs, 801 based on Foata normal form. 15/2741 useless extension candidates. Maximal degree in co-relation 9312. Up to 2659 conditions per place. [2024-06-03 20:13:56,056 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 60 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2024-06-03 20:13:56,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 531 flow [2024-06-03 20:13:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:13:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:13:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-03 20:13:56,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-03 20:13:56,057 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 303 flow. Second operand 6 states and 107 transitions. [2024-06-03 20:13:56,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 531 flow [2024-06-03 20:13:56,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 525 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-03 20:13:56,062 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 378 flow [2024-06-03 20:13:56,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=378, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-03 20:13:56,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-03 20:13:56,063 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 378 flow [2024-06-03 20:13:56,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:56,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:56,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:56,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:13:56,064 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:56,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:56,064 INFO L85 PathProgramCache]: Analyzing trace with hash 274979112, now seen corresponding path program 2 times [2024-06-03 20:13:56,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:56,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7581655] [2024-06-03 20:13:56,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:56,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:56,752 INFO 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 20:13:56,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:56,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7581655] [2024-06-03 20:13:56,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7581655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:56,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:56,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:13:56,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773962682] [2024-06-03 20:13:56,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:56,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:13:56,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:56,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:13:56,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:13:56,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 20:13:56,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 378 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:56,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:56,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 20:13:56,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:57,270 INFO L124 PetriNetUnfolderBase]: 1871/2802 cut-off events. [2024-06-03 20:13:57,270 INFO L125 PetriNetUnfolderBase]: For 9205/9248 co-relation queries the response was YES. [2024-06-03 20:13:57,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10527 conditions, 2802 events. 1871/2802 cut-off events. For 9205/9248 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12907 event pairs, 782 based on Foata normal form. 18/2808 useless extension candidates. Maximal degree in co-relation 10496. Up to 2677 conditions per place. [2024-06-03 20:13:57,284 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 61 selfloop transitions, 23 changer transitions 0/91 dead transitions. [2024-06-03 20:13:57,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 91 transitions, 680 flow [2024-06-03 20:13:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:13:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:13:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-03 20:13:57,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-03 20:13:57,288 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 378 flow. Second operand 6 states and 109 transitions. [2024-06-03 20:13:57,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 91 transitions, 680 flow [2024-06-03 20:13:57,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 657 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-03 20:13:57,294 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 490 flow [2024-06-03 20:13:57,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=490, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-03 20:13:57,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-03 20:13:57,294 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 490 flow [2024-06-03 20:13:57,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:57,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:57,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:57,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:13:57,295 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 20:13:57,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:57,295 INFO L85 PathProgramCache]: Analyzing trace with hash 274988040, now seen corresponding path program 1 times [2024-06-03 20:13:57,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:57,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573150984] [2024-06-03 20:13:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:57,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:58,218 INFO 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 20:13:58,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:58,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573150984] [2024-06-03 20:13:58,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573150984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:58,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:58,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:13:58,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328249640] [2024-06-03 20:13:58,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:58,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:13:58,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:58,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:13:58,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:13:58,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:13:58,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 490 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:58,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:58,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:13:58,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:58,707 INFO L124 PetriNetUnfolderBase]: 1932/2875 cut-off events. [2024-06-03 20:13:58,707 INFO L125 PetriNetUnfolderBase]: For 11634/11634 co-relation queries the response was YES. [2024-06-03 20:13:58,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11244 conditions, 2875 events. 1932/2875 cut-off events. For 11634/11634 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13219 event pairs, 857 based on Foata normal form. 2/2877 useless extension candidates. Maximal degree in co-relation 11210. Up to 2835 conditions per place. [2024-06-03 20:13:58,720 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 77 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-03 20:13:58,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 734 flow [2024-06-03 20:13:58,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:13:58,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:13:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-03 20:13:58,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-03 20:13:58,721 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 490 flow. Second operand 7 states and 111 transitions. [2024-06-03 20:13:58,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 734 flow [2024-06-03 20:13:58,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 94 transitions, 690 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 20:13:58,729 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 502 flow [2024-06-03 20:13:58,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=502, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2024-06-03 20:13:58,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-03 20:13:58,730 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 502 flow [2024-06-03 20:13:58,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:58,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:58,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:58,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:13:58,731 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 20:13:58,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:58,731 INFO L85 PathProgramCache]: Analyzing trace with hash 785936290, now seen corresponding path program 1 times [2024-06-03 20:13:58,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:58,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636921595] [2024-06-03 20:13:58,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:58,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:59,521 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 20:13:59,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:59,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636921595] [2024-06-03 20:13:59,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636921595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:59,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:59,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:13:59,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002671992] [2024-06-03 20:13:59,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:59,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:13:59,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:59,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:13:59,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:13:59,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 20:13:59,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 502 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 20:13:59,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:59,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 20:13:59,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:00,056 INFO L124 PetriNetUnfolderBase]: 1824/2735 cut-off events. [2024-06-03 20:14:00,056 INFO L125 PetriNetUnfolderBase]: For 14654/14700 co-relation queries the response was YES. [2024-06-03 20:14:00,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11362 conditions, 2735 events. 1824/2735 cut-off events. For 14654/14700 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12771 event pairs, 752 based on Foata normal form. 33/2712 useless extension candidates. Maximal degree in co-relation 11327. Up to 2608 conditions per place. [2024-06-03 20:14:00,071 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 18 changer transitions 0/95 dead transitions. [2024-06-03 20:14:00,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 737 flow [2024-06-03 20:14:00,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:14:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:14:00,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-03 20:14:00,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-03 20:14:00,073 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 502 flow. Second operand 6 states and 107 transitions. [2024-06-03 20:14:00,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 737 flow [2024-06-03 20:14:00,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 95 transitions, 695 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:00,087 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 521 flow [2024-06-03 20:14:00,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=521, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-06-03 20:14:00,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-03 20:14:00,088 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 521 flow [2024-06-03 20:14:00,088 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 20:14:00,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:00,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:00,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:14:00,089 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 20:14:00,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:00,090 INFO L85 PathProgramCache]: Analyzing trace with hash -330808593, now seen corresponding path program 1 times [2024-06-03 20:14:00,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:00,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435295675] [2024-06-03 20:14:00,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:00,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:00,777 INFO 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 20:14:00,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:00,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435295675] [2024-06-03 20:14:00,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435295675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:00,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:00,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:00,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138372968] [2024-06-03 20:14:00,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:00,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:00,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:00,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:00,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:00,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 521 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:00,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:00,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:00,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:01,326 INFO L124 PetriNetUnfolderBase]: 1946/2898 cut-off events. [2024-06-03 20:14:01,326 INFO L125 PetriNetUnfolderBase]: For 15739/15743 co-relation queries the response was YES. [2024-06-03 20:14:01,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12057 conditions, 2898 events. 1946/2898 cut-off events. For 15739/15743 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13165 event pairs, 829 based on Foata normal form. 8/2906 useless extension candidates. Maximal degree in co-relation 12021. Up to 2812 conditions per place. [2024-06-03 20:14:01,338 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-03 20:14:01,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 112 transitions, 897 flow [2024-06-03 20:14:01,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 20:14:01,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-03 20:14:01,340 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 521 flow. Second operand 7 states and 117 transitions. [2024-06-03 20:14:01,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 112 transitions, 897 flow [2024-06-03 20:14:01,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 112 transitions, 861 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 20:14:01,349 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 655 flow [2024-06-03 20:14:01,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=655, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-06-03 20:14:01,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-03 20:14:01,349 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 655 flow [2024-06-03 20:14:01,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:01,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:01,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:01,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:14:01,350 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 20:14:01,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash -65313883, now seen corresponding path program 2 times [2024-06-03 20:14:01,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:01,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967778218] [2024-06-03 20:14:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:01,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:01,992 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 20:14:01,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:01,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967778218] [2024-06-03 20:14:01,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967778218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:01,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:01,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:01,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038462126] [2024-06-03 20:14:01,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:01,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:01,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:01,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:02,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:02,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 655 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:02,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:02,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:02,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:02,537 INFO L124 PetriNetUnfolderBase]: 1990/2964 cut-off events. [2024-06-03 20:14:02,538 INFO L125 PetriNetUnfolderBase]: For 19739/19747 co-relation queries the response was YES. [2024-06-03 20:14:02,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13023 conditions, 2964 events. 1990/2964 cut-off events. For 19739/19747 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13606 event pairs, 778 based on Foata normal form. 16/2980 useless extension candidates. Maximal degree in co-relation 12983. Up to 2699 conditions per place. [2024-06-03 20:14:02,554 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 33 changer transitions 0/125 dead transitions. [2024-06-03 20:14:02,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 125 transitions, 1099 flow [2024-06-03 20:14:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 20:14:02,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-03 20:14:02,555 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 655 flow. Second operand 7 states and 122 transitions. [2024-06-03 20:14:02,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 125 transitions, 1099 flow [2024-06-03 20:14:02,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 1075 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-03 20:14:02,569 INFO L231 Difference]: Finished difference. Result has 89 places, 100 transitions, 822 flow [2024-06-03 20:14:02,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=822, PETRI_PLACES=89, PETRI_TRANSITIONS=100} [2024-06-03 20:14:02,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-03 20:14:02,570 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 100 transitions, 822 flow [2024-06-03 20:14:02,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:02,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:02,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:02,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:14:02,571 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 20:14:02,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:02,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1455836185, now seen corresponding path program 3 times [2024-06-03 20:14:02,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:02,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359033859] [2024-06-03 20:14:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:02,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:03,216 INFO 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 20:14:03,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:03,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359033859] [2024-06-03 20:14:03,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359033859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:03,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:03,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:03,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329626018] [2024-06-03 20:14:03,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:03,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:03,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:03,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:03,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:03,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 100 transitions, 822 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:03,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:03,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:03,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:03,725 INFO L124 PetriNetUnfolderBase]: 1996/2973 cut-off events. [2024-06-03 20:14:03,725 INFO L125 PetriNetUnfolderBase]: For 23756/23764 co-relation queries the response was YES. [2024-06-03 20:14:03,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14031 conditions, 2973 events. 1996/2973 cut-off events. For 23756/23764 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13625 event pairs, 785 based on Foata normal form. 12/2985 useless extension candidates. Maximal degree in co-relation 13987. Up to 2705 conditions per place. [2024-06-03 20:14:03,742 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 91 selfloop transitions, 35 changer transitions 0/129 dead transitions. [2024-06-03 20:14:03,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 129 transitions, 1235 flow [2024-06-03 20:14:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:14:03,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-03 20:14:03,744 INFO L175 Difference]: Start difference. First operand has 89 places, 100 transitions, 822 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:14:03,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 129 transitions, 1235 flow [2024-06-03 20:14:03,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 129 transitions, 1193 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-03 20:14:03,761 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 901 flow [2024-06-03 20:14:03,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=901, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-03 20:14:03,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-03 20:14:03,762 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 901 flow [2024-06-03 20:14:03,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:03,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:03,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:03,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:14:03,762 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 20:14:03,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:03,763 INFO L85 PathProgramCache]: Analyzing trace with hash -65303963, now seen corresponding path program 1 times [2024-06-03 20:14:03,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:03,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063347267] [2024-06-03 20:14:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:03,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:04,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:04,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063347267] [2024-06-03 20:14:04,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063347267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:04,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:04,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:04,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094932799] [2024-06-03 20:14:04,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:04,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:04,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:04,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:04,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:04,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:04,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 901 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 20:14:04,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:04,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:04,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:05,264 INFO L124 PetriNetUnfolderBase]: 1988/2957 cut-off events. [2024-06-03 20:14:05,264 INFO L125 PetriNetUnfolderBase]: For 26142/26142 co-relation queries the response was YES. [2024-06-03 20:14:05,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14250 conditions, 2957 events. 1988/2957 cut-off events. For 26142/26142 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13497 event pairs, 783 based on Foata normal form. 4/2961 useless extension candidates. Maximal degree in co-relation 14204. Up to 2899 conditions per place. [2024-06-03 20:14:05,278 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 111 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-06-03 20:14:05,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 130 transitions, 1231 flow [2024-06-03 20:14:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:05,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-03 20:14:05,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-03 20:14:05,280 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 901 flow. Second operand 8 states and 125 transitions. [2024-06-03 20:14:05,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 130 transitions, 1231 flow [2024-06-03 20:14:05,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 130 transitions, 1174 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 20:14:05,299 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 903 flow [2024-06-03 20:14:05,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=903, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2024-06-03 20:14:05,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-03 20:14:05,299 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 903 flow [2024-06-03 20:14:05,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 20:14:05,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:05,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:05,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:14:05,300 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 20:14:05,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2008575669, now seen corresponding path program 1 times [2024-06-03 20:14:05,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:05,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771763688] [2024-06-03 20:14:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:05,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:06,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:06,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771763688] [2024-06-03 20:14:06,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771763688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:06,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:06,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:06,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051038483] [2024-06-03 20:14:06,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:06,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:06,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:06,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:06,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:06,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 20:14:06,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 903 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 20:14:06,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:06,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 20:14:06,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:06,928 INFO L124 PetriNetUnfolderBase]: 1920/2878 cut-off events. [2024-06-03 20:14:06,928 INFO L125 PetriNetUnfolderBase]: For 31861/31945 co-relation queries the response was YES. [2024-06-03 20:14:06,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14445 conditions, 2878 events. 1920/2878 cut-off events. For 31861/31945 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13441 event pairs, 585 based on Foata normal form. 19/2833 useless extension candidates. Maximal degree in co-relation 14398. Up to 2698 conditions per place. [2024-06-03 20:14:06,944 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 97 selfloop transitions, 21 changer transitions 0/136 dead transitions. [2024-06-03 20:14:06,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1229 flow [2024-06-03 20:14:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:06,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 20:14:06,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:14:06,947 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 903 flow. Second operand 7 states and 126 transitions. [2024-06-03 20:14:06,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1229 flow [2024-06-03 20:14:06,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1188 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:06,964 INFO L231 Difference]: Finished difference. Result has 100 places, 109 transitions, 940 flow [2024-06-03 20:14:06,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=940, PETRI_PLACES=100, PETRI_TRANSITIONS=109} [2024-06-03 20:14:06,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-03 20:14:06,966 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 109 transitions, 940 flow [2024-06-03 20:14:06,966 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 20:14:06,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:06,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:06,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:14:06,966 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 20:14:06,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:06,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2008580319, now seen corresponding path program 2 times [2024-06-03 20:14:06,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:06,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145988396] [2024-06-03 20:14:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:06,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:08,010 INFO 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 20:14:08,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:08,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145988396] [2024-06-03 20:14:08,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145988396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:08,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:08,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:08,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845305646] [2024-06-03 20:14:08,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:08,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:08,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:08,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:08,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:08,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 20:14:08,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 109 transitions, 940 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 20:14:08,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:08,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 20:14:08,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:08,689 INFO L124 PetriNetUnfolderBase]: 1940/2910 cut-off events. [2024-06-03 20:14:08,689 INFO L125 PetriNetUnfolderBase]: For 36459/36553 co-relation queries the response was YES. [2024-06-03 20:14:08,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15209 conditions, 2910 events. 1940/2910 cut-off events. For 36459/36553 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13573 event pairs, 580 based on Foata normal form. 26/2870 useless extension candidates. Maximal degree in co-relation 15161. Up to 2672 conditions per place. [2024-06-03 20:14:08,705 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 88 selfloop transitions, 32 changer transitions 0/138 dead transitions. [2024-06-03 20:14:08,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 138 transitions, 1274 flow [2024-06-03 20:14:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 20:14:08,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-03 20:14:08,708 INFO L175 Difference]: Start difference. First operand has 100 places, 109 transitions, 940 flow. Second operand 7 states and 127 transitions. [2024-06-03 20:14:08,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 138 transitions, 1274 flow [2024-06-03 20:14:08,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 138 transitions, 1220 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:08,727 INFO L231 Difference]: Finished difference. Result has 102 places, 112 transitions, 995 flow [2024-06-03 20:14:08,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=995, PETRI_PLACES=102, PETRI_TRANSITIONS=112} [2024-06-03 20:14:08,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-03 20:14:08,728 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 112 transitions, 995 flow [2024-06-03 20:14:08,728 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 20:14:08,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:08,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:08,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:14:08,729 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 20:14:08,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:08,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1665310171, now seen corresponding path program 1 times [2024-06-03 20:14:08,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:08,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635182719] [2024-06-03 20:14:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:08,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:09,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:09,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635182719] [2024-06-03 20:14:09,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635182719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:09,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:09,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:09,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170330196] [2024-06-03 20:14:09,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:09,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:09,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:09,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:09,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:09,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:09,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 112 transitions, 995 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 20:14:09,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:09,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:09,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:10,360 INFO L124 PetriNetUnfolderBase]: 2047/3042 cut-off events. [2024-06-03 20:14:10,360 INFO L125 PetriNetUnfolderBase]: For 37873/37873 co-relation queries the response was YES. [2024-06-03 20:14:10,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16084 conditions, 3042 events. 2047/3042 cut-off events. For 37873/37873 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13948 event pairs, 745 based on Foata normal form. 2/3044 useless extension candidates. Maximal degree in co-relation 16035. Up to 2940 conditions per place. [2024-06-03 20:14:10,377 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 114 selfloop transitions, 22 changer transitions 0/139 dead transitions. [2024-06-03 20:14:10,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 139 transitions, 1363 flow [2024-06-03 20:14:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 20:14:10,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-03 20:14:10,379 INFO L175 Difference]: Start difference. First operand has 102 places, 112 transitions, 995 flow. Second operand 7 states and 117 transitions. [2024-06-03 20:14:10,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 139 transitions, 1363 flow [2024-06-03 20:14:10,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 139 transitions, 1284 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:10,401 INFO L231 Difference]: Finished difference. Result has 104 places, 115 transitions, 1010 flow [2024-06-03 20:14:10,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1010, PETRI_PLACES=104, PETRI_TRANSITIONS=115} [2024-06-03 20:14:10,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-03 20:14:10,402 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 115 transitions, 1010 flow [2024-06-03 20:14:10,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 20:14:10,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:10,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:10,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:14:10,402 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:10,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:10,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1665130433, now seen corresponding path program 1 times [2024-06-03 20:14:10,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:10,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526932537] [2024-06-03 20:14:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:10,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:11,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:11,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526932537] [2024-06-03 20:14:11,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526932537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:11,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:11,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:11,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202267315] [2024-06-03 20:14:11,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:11,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:11,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:11,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:11,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:11,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:11,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 115 transitions, 1010 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 20:14:11,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:11,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:11,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:11,897 INFO L124 PetriNetUnfolderBase]: 2069/3076 cut-off events. [2024-06-03 20:14:11,897 INFO L125 PetriNetUnfolderBase]: For 42310/42318 co-relation queries the response was YES. [2024-06-03 20:14:11,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16519 conditions, 3076 events. 2069/3076 cut-off events. For 42310/42318 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14078 event pairs, 749 based on Foata normal form. 12/3088 useless extension candidates. Maximal degree in co-relation 16469. Up to 2967 conditions per place. [2024-06-03 20:14:11,915 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 20 changer transitions 0/147 dead transitions. [2024-06-03 20:14:11,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 147 transitions, 1409 flow [2024-06-03 20:14:11,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:11,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 20:14:11,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 20:14:11,917 INFO L175 Difference]: Start difference. First operand has 104 places, 115 transitions, 1010 flow. Second operand 8 states and 132 transitions. [2024-06-03 20:14:11,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 147 transitions, 1409 flow [2024-06-03 20:14:11,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 147 transitions, 1369 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 20:14:11,942 INFO L231 Difference]: Finished difference. Result has 109 places, 118 transitions, 1057 flow [2024-06-03 20:14:11,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1057, PETRI_PLACES=109, PETRI_TRANSITIONS=118} [2024-06-03 20:14:11,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-03 20:14:11,942 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 118 transitions, 1057 flow [2024-06-03 20:14:11,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 20:14:11,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:11,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:11,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:14:11,943 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:11,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:11,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2033003225, now seen corresponding path program 2 times [2024-06-03 20:14:11,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:11,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420469936] [2024-06-03 20:14:11,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:11,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:12,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:12,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420469936] [2024-06-03 20:14:12,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420469936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:12,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:12,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:12,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783465761] [2024-06-03 20:14:12,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:12,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:12,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:12,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:12,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:12,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:12,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 118 transitions, 1057 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:12,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:12,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:12,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:13,242 INFO L124 PetriNetUnfolderBase]: 2059/3064 cut-off events. [2024-06-03 20:14:13,243 INFO L125 PetriNetUnfolderBase]: For 46292/46300 co-relation queries the response was YES. [2024-06-03 20:14:13,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16683 conditions, 3064 events. 2059/3064 cut-off events. For 46292/46300 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14094 event pairs, 746 based on Foata normal form. 12/3076 useless extension candidates. Maximal degree in co-relation 16632. Up to 2811 conditions per place. [2024-06-03 20:14:13,259 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 43 changer transitions 0/142 dead transitions. [2024-06-03 20:14:13,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1407 flow [2024-06-03 20:14:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-03 20:14:13,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 20:14:13,260 INFO L175 Difference]: Start difference. First operand has 109 places, 118 transitions, 1057 flow. Second operand 7 states and 119 transitions. [2024-06-03 20:14:13,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1407 flow [2024-06-03 20:14:13,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 142 transitions, 1349 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:13,286 INFO L231 Difference]: Finished difference. Result has 111 places, 120 transitions, 1137 flow [2024-06-03 20:14:13,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1137, PETRI_PLACES=111, PETRI_TRANSITIONS=120} [2024-06-03 20:14:13,286 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-03 20:14:13,286 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 120 transitions, 1137 flow [2024-06-03 20:14:13,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:13,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:13,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:13,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:14:13,287 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:13,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:13,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2033010169, now seen corresponding path program 3 times [2024-06-03 20:14:13,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:13,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600525683] [2024-06-03 20:14:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:13,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:14,313 INFO 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 20:14:14,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:14,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600525683] [2024-06-03 20:14:14,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600525683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:14,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:14,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:14,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448380729] [2024-06-03 20:14:14,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:14,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:14,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:14,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:14,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:14,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 20:14:14,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 120 transitions, 1137 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:14,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:14,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 20:14:14,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:14,941 INFO L124 PetriNetUnfolderBase]: 1957/2941 cut-off events. [2024-06-03 20:14:14,941 INFO L125 PetriNetUnfolderBase]: For 54166/54257 co-relation queries the response was YES. [2024-06-03 20:14:14,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16877 conditions, 2941 events. 1957/2941 cut-off events. For 54166/54257 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13808 event pairs, 571 based on Foata normal form. 25/2898 useless extension candidates. Maximal degree in co-relation 16824. Up to 2637 conditions per place. [2024-06-03 20:14:14,957 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 39 changer transitions 0/147 dead transitions. [2024-06-03 20:14:14,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 147 transitions, 1485 flow [2024-06-03 20:14:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 20:14:14,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-03 20:14:14,959 INFO L175 Difference]: Start difference. First operand has 111 places, 120 transitions, 1137 flow. Second operand 7 states and 127 transitions. [2024-06-03 20:14:14,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 147 transitions, 1485 flow [2024-06-03 20:14:14,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 147 transitions, 1361 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:14,991 INFO L231 Difference]: Finished difference. Result has 111 places, 123 transitions, 1140 flow [2024-06-03 20:14:14,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1140, PETRI_PLACES=111, PETRI_TRANSITIONS=123} [2024-06-03 20:14:14,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-03 20:14:14,992 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 123 transitions, 1140 flow [2024-06-03 20:14:14,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:14,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:14,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:14,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:14:14,992 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:14,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash -267683638, now seen corresponding path program 1 times [2024-06-03 20:14:14,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:14,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015565418] [2024-06-03 20:14:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:14,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:16,122 INFO 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 20:14:16,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:16,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015565418] [2024-06-03 20:14:16,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015565418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:16,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:16,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:16,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507163870] [2024-06-03 20:14:16,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:16,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:16,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:16,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:16,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:16,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:16,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 123 transitions, 1140 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:16,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:16,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:16,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:16,873 INFO L124 PetriNetUnfolderBase]: 2159/3218 cut-off events. [2024-06-03 20:14:16,873 INFO L125 PetriNetUnfolderBase]: For 50669/50671 co-relation queries the response was YES. [2024-06-03 20:14:16,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17962 conditions, 3218 events. 2159/3218 cut-off events. For 50669/50671 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14815 event pairs, 619 based on Foata normal form. 6/3224 useless extension candidates. Maximal degree in co-relation 17909. Up to 3037 conditions per place. [2024-06-03 20:14:16,890 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 147 selfloop transitions, 31 changer transitions 0/181 dead transitions. [2024-06-03 20:14:16,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 181 transitions, 1788 flow [2024-06-03 20:14:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:16,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 20:14:16,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 20:14:16,891 INFO L175 Difference]: Start difference. First operand has 111 places, 123 transitions, 1140 flow. Second operand 9 states and 153 transitions. [2024-06-03 20:14:16,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 181 transitions, 1788 flow [2024-06-03 20:14:16,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 181 transitions, 1667 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:16,923 INFO L231 Difference]: Finished difference. Result has 118 places, 145 transitions, 1326 flow [2024-06-03 20:14:16,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1326, PETRI_PLACES=118, PETRI_TRANSITIONS=145} [2024-06-03 20:14:16,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-03 20:14:16,924 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 145 transitions, 1326 flow [2024-06-03 20:14:16,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:16,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:16,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:16,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:14:16,924 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:16,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:16,924 INFO L85 PathProgramCache]: Analyzing trace with hash -85156338, now seen corresponding path program 2 times [2024-06-03 20:14:16,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:16,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137898589] [2024-06-03 20:14:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:16,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:17,965 INFO 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 20:14:17,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:17,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137898589] [2024-06-03 20:14:17,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137898589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:17,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:17,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:17,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563501772] [2024-06-03 20:14:17,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:17,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:17,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:17,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:17,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:18,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:18,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 145 transitions, 1326 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:18,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:18,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:18,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:18,656 INFO L124 PetriNetUnfolderBase]: 2181/3250 cut-off events. [2024-06-03 20:14:18,657 INFO L125 PetriNetUnfolderBase]: For 56154/56158 co-relation queries the response was YES. [2024-06-03 20:14:18,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18722 conditions, 3250 events. 2181/3250 cut-off events. For 56154/56158 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14929 event pairs, 598 based on Foata normal form. 8/3258 useless extension candidates. Maximal degree in co-relation 18665. Up to 3013 conditions per place. [2024-06-03 20:14:18,678 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 36 changer transitions 0/183 dead transitions. [2024-06-03 20:14:18,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 183 transitions, 1844 flow [2024-06-03 20:14:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:14:18,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-03 20:14:18,680 INFO L175 Difference]: Start difference. First operand has 118 places, 145 transitions, 1326 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:14:18,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 183 transitions, 1844 flow [2024-06-03 20:14:18,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 183 transitions, 1794 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-03 20:14:18,728 INFO L231 Difference]: Finished difference. Result has 125 places, 151 transitions, 1437 flow [2024-06-03 20:14:18,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1437, PETRI_PLACES=125, PETRI_TRANSITIONS=151} [2024-06-03 20:14:18,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-03 20:14:18,729 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 151 transitions, 1437 flow [2024-06-03 20:14:18,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:18,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:18,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:18,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:14:18,729 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 20:14:18,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:18,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2136449072, now seen corresponding path program 3 times [2024-06-03 20:14:18,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:18,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850538347] [2024-06-03 20:14:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:18,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:19,711 INFO 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 20:14:19,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:19,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850538347] [2024-06-03 20:14:19,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850538347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:19,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:19,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:19,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301671558] [2024-06-03 20:14:19,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:19,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:19,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:19,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:19,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:19,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:19,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 151 transitions, 1437 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:19,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:19,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:19,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:20,515 INFO L124 PetriNetUnfolderBase]: 2235/3329 cut-off events. [2024-06-03 20:14:20,515 INFO L125 PetriNetUnfolderBase]: For 64069/64069 co-relation queries the response was YES. [2024-06-03 20:14:20,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19986 conditions, 3329 events. 2235/3329 cut-off events. For 64069/64069 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15329 event pairs, 594 based on Foata normal form. 4/3333 useless extension candidates. Maximal degree in co-relation 19926. Up to 2947 conditions per place. [2024-06-03 20:14:20,532 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 138 selfloop transitions, 50 changer transitions 0/191 dead transitions. [2024-06-03 20:14:20,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 191 transitions, 2081 flow [2024-06-03 20:14:20,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:14:20,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 20:14:20,534 INFO L175 Difference]: Start difference. First operand has 125 places, 151 transitions, 1437 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:14:20,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 191 transitions, 2081 flow [2024-06-03 20:14:20,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 191 transitions, 2006 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 20:14:20,583 INFO L231 Difference]: Finished difference. Result has 131 places, 159 transitions, 1585 flow [2024-06-03 20:14:20,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1585, PETRI_PLACES=131, PETRI_TRANSITIONS=159} [2024-06-03 20:14:20,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-03 20:14:20,584 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 159 transitions, 1585 flow [2024-06-03 20:14:20,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:20,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:20,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:20,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:14:20,584 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 20:14:20,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:20,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1997926502, now seen corresponding path program 4 times [2024-06-03 20:14:20,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:20,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009787648] [2024-06-03 20:14:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:20,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:21,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:21,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009787648] [2024-06-03 20:14:21,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009787648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:21,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:21,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:21,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345286645] [2024-06-03 20:14:21,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:21,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:21,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:21,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:21,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 159 transitions, 1585 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:21,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:21,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:21,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:22,478 INFO L124 PetriNetUnfolderBase]: 2225/3315 cut-off events. [2024-06-03 20:14:22,479 INFO L125 PetriNetUnfolderBase]: For 64018/64018 co-relation queries the response was YES. [2024-06-03 20:14:22,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20083 conditions, 3315 events. 2225/3315 cut-off events. For 64018/64018 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15293 event pairs, 587 based on Foata normal form. 4/3319 useless extension candidates. Maximal degree in co-relation 20020. Up to 2939 conditions per place. [2024-06-03 20:14:22,503 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 135 selfloop transitions, 53 changer transitions 0/191 dead transitions. [2024-06-03 20:14:22,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 191 transitions, 2068 flow [2024-06-03 20:14:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:14:22,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 20:14:22,504 INFO L175 Difference]: Start difference. First operand has 131 places, 159 transitions, 1585 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:14:22,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 191 transitions, 2068 flow [2024-06-03 20:14:22,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 191 transitions, 1916 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:22,559 INFO L231 Difference]: Finished difference. Result has 134 places, 160 transitions, 1563 flow [2024-06-03 20:14:22,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1563, PETRI_PLACES=134, PETRI_TRANSITIONS=160} [2024-06-03 20:14:22,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-03 20:14:22,559 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 160 transitions, 1563 flow [2024-06-03 20:14:22,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:22,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:22,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:22,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:14:22,560 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 20:14:22,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:22,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2142026778, now seen corresponding path program 1 times [2024-06-03 20:14:22,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:22,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433106317] [2024-06-03 20:14:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:22,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:23,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:23,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433106317] [2024-06-03 20:14:23,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433106317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:23,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:23,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:23,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541987110] [2024-06-03 20:14:23,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:23,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:23,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:23,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:23,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:23,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:23,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 160 transitions, 1563 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:23,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:23,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:23,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:24,066 INFO L124 PetriNetUnfolderBase]: 2259/3372 cut-off events. [2024-06-03 20:14:24,067 INFO L125 PetriNetUnfolderBase]: For 69605/69617 co-relation queries the response was YES. [2024-06-03 20:14:24,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20376 conditions, 3372 events. 2259/3372 cut-off events. For 69605/69617 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15667 event pairs, 683 based on Foata normal form. 20/3392 useless extension candidates. Maximal degree in co-relation 20312. Up to 3011 conditions per place. [2024-06-03 20:14:24,089 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 137 selfloop transitions, 52 changer transitions 0/192 dead transitions. [2024-06-03 20:14:24,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 192 transitions, 2065 flow [2024-06-03 20:14:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:14:24,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-03 20:14:24,091 INFO L175 Difference]: Start difference. First operand has 134 places, 160 transitions, 1563 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:14:24,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 192 transitions, 2065 flow [2024-06-03 20:14:24,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 192 transitions, 1982 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:24,145 INFO L231 Difference]: Finished difference. Result has 137 places, 162 transitions, 1623 flow [2024-06-03 20:14:24,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1623, PETRI_PLACES=137, PETRI_TRANSITIONS=162} [2024-06-03 20:14:24,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-03 20:14:24,146 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 162 transitions, 1623 flow [2024-06-03 20:14:24,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:24,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:24,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:24,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:14:24,147 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 20:14:24,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:24,147 INFO L85 PathProgramCache]: Analyzing trace with hash -877891394, now seen corresponding path program 2 times [2024-06-03 20:14:24,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:24,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531787426] [2024-06-03 20:14:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:24,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:24,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:24,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531787426] [2024-06-03 20:14:24,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531787426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:24,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:24,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:24,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370968348] [2024-06-03 20:14:24,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:24,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:24,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:24,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:24,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:24,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:24,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 162 transitions, 1623 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:24,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:24,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:24,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:25,578 INFO L124 PetriNetUnfolderBase]: 2293/3426 cut-off events. [2024-06-03 20:14:25,578 INFO L125 PetriNetUnfolderBase]: For 75426/75438 co-relation queries the response was YES. [2024-06-03 20:14:25,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21088 conditions, 3426 events. 2293/3426 cut-off events. For 75426/75438 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15939 event pairs, 728 based on Foata normal form. 20/3446 useless extension candidates. Maximal degree in co-relation 21023. Up to 3075 conditions per place. [2024-06-03 20:14:25,601 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 141 selfloop transitions, 50 changer transitions 0/194 dead transitions. [2024-06-03 20:14:25,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 194 transitions, 2133 flow [2024-06-03 20:14:25,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:25,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:14:25,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-03 20:14:25,602 INFO L175 Difference]: Start difference. First operand has 137 places, 162 transitions, 1623 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:14:25,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 194 transitions, 2133 flow [2024-06-03 20:14:25,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 194 transitions, 2018 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:25,659 INFO L231 Difference]: Finished difference. Result has 139 places, 164 transitions, 1647 flow [2024-06-03 20:14:25,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1647, PETRI_PLACES=139, PETRI_TRANSITIONS=164} [2024-06-03 20:14:25,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-03 20:14:25,659 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 164 transitions, 1647 flow [2024-06-03 20:14:25,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:25,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:25,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:25,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:14:25,660 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 20:14:25,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:25,660 INFO L85 PathProgramCache]: Analyzing trace with hash -861773714, now seen corresponding path program 3 times [2024-06-03 20:14:25,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:25,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732832050] [2024-06-03 20:14:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:25,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:26,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:26,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732832050] [2024-06-03 20:14:26,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732832050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:26,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:26,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:26,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81351278] [2024-06-03 20:14:26,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:26,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:26,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:26,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:26,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:26,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:26,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 164 transitions, 1647 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:26,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:26,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:26,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:27,139 INFO L124 PetriNetUnfolderBase]: 2277/3402 cut-off events. [2024-06-03 20:14:27,139 INFO L125 PetriNetUnfolderBase]: For 79158/79170 co-relation queries the response was YES. [2024-06-03 20:14:27,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21142 conditions, 3402 events. 2277/3402 cut-off events. For 79158/79170 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15911 event pairs, 665 based on Foata normal form. 20/3422 useless extension candidates. Maximal degree in co-relation 21076. Up to 2931 conditions per place. [2024-06-03 20:14:27,157 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 141 selfloop transitions, 53 changer transitions 0/197 dead transitions. [2024-06-03 20:14:27,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 197 transitions, 2169 flow [2024-06-03 20:14:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:14:27,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-03 20:14:27,159 INFO L175 Difference]: Start difference. First operand has 139 places, 164 transitions, 1647 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:14:27,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 197 transitions, 2169 flow [2024-06-03 20:14:27,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 197 transitions, 2048 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:27,217 INFO L231 Difference]: Finished difference. Result has 141 places, 166 transitions, 1675 flow [2024-06-03 20:14:27,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1675, PETRI_PLACES=141, PETRI_TRANSITIONS=166} [2024-06-03 20:14:27,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-03 20:14:27,218 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 166 transitions, 1675 flow [2024-06-03 20:14:27,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:27,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:27,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:27,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:14:27,218 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 20:14:27,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:27,218 INFO L85 PathProgramCache]: Analyzing trace with hash -870987720, now seen corresponding path program 5 times [2024-06-03 20:14:27,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:27,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107301664] [2024-06-03 20:14:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:27,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:28,262 INFO 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 20:14:28,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:28,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107301664] [2024-06-03 20:14:28,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107301664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:28,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:28,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:28,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340916011] [2024-06-03 20:14:28,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:28,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:28,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:28,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:28,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:28,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 166 transitions, 1675 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:28,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:28,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:28,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:29,121 INFO L124 PetriNetUnfolderBase]: 2321/3469 cut-off events. [2024-06-03 20:14:29,121 INFO L125 PetriNetUnfolderBase]: For 87201/87209 co-relation queries the response was YES. [2024-06-03 20:14:29,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21828 conditions, 3469 events. 2321/3469 cut-off events. For 87201/87209 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16274 event pairs, 562 based on Foata normal form. 12/3481 useless extension candidates. Maximal degree in co-relation 21761. Up to 2741 conditions per place. [2024-06-03 20:14:29,148 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 132 selfloop transitions, 74 changer transitions 0/209 dead transitions. [2024-06-03 20:14:29,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 209 transitions, 2415 flow [2024-06-03 20:14:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:29,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:14:29,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:14:29,149 INFO L175 Difference]: Start difference. First operand has 141 places, 166 transitions, 1675 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:14:29,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 209 transitions, 2415 flow [2024-06-03 20:14:29,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 209 transitions, 2284 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:29,218 INFO L231 Difference]: Finished difference. Result has 144 places, 176 transitions, 1860 flow [2024-06-03 20:14:29,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1860, PETRI_PLACES=144, PETRI_TRANSITIONS=176} [2024-06-03 20:14:29,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-03 20:14:29,218 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 176 transitions, 1860 flow [2024-06-03 20:14:29,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:29,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:29,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:29,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:14:29,219 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 20:14:29,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:29,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1401201108, now seen corresponding path program 6 times [2024-06-03 20:14:29,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:29,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412624649] [2024-06-03 20:14:29,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:29,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:30,481 INFO 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 20:14:30,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:30,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412624649] [2024-06-03 20:14:30,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412624649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:30,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:30,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:30,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152874005] [2024-06-03 20:14:30,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:30,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:30,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:30,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:30,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:30,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 176 transitions, 1860 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:30,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:30,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:30,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:31,324 INFO L124 PetriNetUnfolderBase]: 2343/3501 cut-off events. [2024-06-03 20:14:31,324 INFO L125 PetriNetUnfolderBase]: For 94420/94428 co-relation queries the response was YES. [2024-06-03 20:14:31,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22875 conditions, 3501 events. 2343/3501 cut-off events. For 94420/94428 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16444 event pairs, 588 based on Foata normal form. 8/3509 useless extension candidates. Maximal degree in co-relation 22806. Up to 2959 conditions per place. [2024-06-03 20:14:31,351 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 145 selfloop transitions, 69 changer transitions 0/217 dead transitions. [2024-06-03 20:14:31,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 217 transitions, 2634 flow [2024-06-03 20:14:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:14:31,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:14:31,352 INFO L175 Difference]: Start difference. First operand has 144 places, 176 transitions, 1860 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:14:31,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 217 transitions, 2634 flow [2024-06-03 20:14:31,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 217 transitions, 2520 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-03 20:14:31,491 INFO L231 Difference]: Finished difference. Result has 150 places, 184 transitions, 2060 flow [2024-06-03 20:14:31,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2060, PETRI_PLACES=150, PETRI_TRANSITIONS=184} [2024-06-03 20:14:31,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-03 20:14:31,492 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 184 transitions, 2060 flow [2024-06-03 20:14:31,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:31,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:31,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:31,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:14:31,492 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 20:14:31,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:31,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1401195528, now seen corresponding path program 7 times [2024-06-03 20:14:31,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:31,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169852165] [2024-06-03 20:14:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:31,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:32,648 INFO 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 20:14:32,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:32,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169852165] [2024-06-03 20:14:32,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169852165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:32,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:32,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:32,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907492232] [2024-06-03 20:14:32,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:32,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:32,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:32,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:32,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:32,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:32,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 184 transitions, 2060 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:32,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:32,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:32,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:33,447 INFO L124 PetriNetUnfolderBase]: 2333/3487 cut-off events. [2024-06-03 20:14:33,448 INFO L125 PetriNetUnfolderBase]: For 99182/99190 co-relation queries the response was YES. [2024-06-03 20:14:33,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23261 conditions, 3487 events. 2333/3487 cut-off events. For 99182/99190 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16341 event pairs, 593 based on Foata normal form. 8/3495 useless extension candidates. Maximal degree in co-relation 23189. Up to 2951 conditions per place. [2024-06-03 20:14:33,472 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 140 selfloop transitions, 70 changer transitions 0/213 dead transitions. [2024-06-03 20:14:33,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 213 transitions, 2566 flow [2024-06-03 20:14:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:14:33,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 20:14:33,473 INFO L175 Difference]: Start difference. First operand has 150 places, 184 transitions, 2060 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:14:33,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 213 transitions, 2566 flow [2024-06-03 20:14:33,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 213 transitions, 2419 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-03 20:14:33,587 INFO L231 Difference]: Finished difference. Result has 155 places, 184 transitions, 2061 flow [2024-06-03 20:14:33,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2061, PETRI_PLACES=155, PETRI_TRANSITIONS=184} [2024-06-03 20:14:33,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-03 20:14:33,588 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 184 transitions, 2061 flow [2024-06-03 20:14:33,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:33,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:33,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:33,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:14:33,588 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 20:14:33,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1895652456, now seen corresponding path program 1 times [2024-06-03 20:14:33,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:33,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868258411] [2024-06-03 20:14:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:33,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:34,833 INFO 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 20:14:34,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:34,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868258411] [2024-06-03 20:14:34,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868258411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:34,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:34,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:34,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215076135] [2024-06-03 20:14:34,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:34,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:34,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:34,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:34,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 20:14:34,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 184 transitions, 2061 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:34,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:34,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 20:14:34,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:35,661 INFO L124 PetriNetUnfolderBase]: 2244/3385 cut-off events. [2024-06-03 20:14:35,661 INFO L125 PetriNetUnfolderBase]: For 109133/109176 co-relation queries the response was YES. [2024-06-03 20:14:35,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23243 conditions, 3385 events. 2244/3385 cut-off events. For 109133/109176 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16153 event pairs, 398 based on Foata normal form. 11/3338 useless extension candidates. Maximal degree in co-relation 23169. Up to 3046 conditions per place. [2024-06-03 20:14:35,687 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 145 selfloop transitions, 31 changer transitions 0/218 dead transitions. [2024-06-03 20:14:35,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 218 transitions, 2543 flow [2024-06-03 20:14:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:14:35,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 20:14:35,688 INFO L175 Difference]: Start difference. First operand has 155 places, 184 transitions, 2061 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:14:35,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 218 transitions, 2543 flow [2024-06-03 20:14:35,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 218 transitions, 2415 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:35,788 INFO L231 Difference]: Finished difference. Result has 158 places, 186 transitions, 2036 flow [2024-06-03 20:14:35,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2036, PETRI_PLACES=158, PETRI_TRANSITIONS=186} [2024-06-03 20:14:35,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-03 20:14:35,789 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 186 transitions, 2036 flow [2024-06-03 20:14:35,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:35,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:35,789 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 20:14:35,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:14:35,789 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 20:14:35,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:35,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1687915156, now seen corresponding path program 2 times [2024-06-03 20:14:35,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:35,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38369328] [2024-06-03 20:14:35,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:35,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:37,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38369328] [2024-06-03 20:14:37,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38369328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:37,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:37,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:37,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7421301] [2024-06-03 20:14:37,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:37,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:37,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:37,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:37,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 20:14:37,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 186 transitions, 2036 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:37,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:37,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 20:14:37,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:38,124 INFO L124 PetriNetUnfolderBase]: 2259/3412 cut-off events. [2024-06-03 20:14:38,124 INFO L125 PetriNetUnfolderBase]: For 116966/117008 co-relation queries the response was YES. [2024-06-03 20:14:38,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23677 conditions, 3412 events. 2259/3412 cut-off events. For 116966/117008 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16345 event pairs, 510 based on Foata normal form. 9/3361 useless extension candidates. Maximal degree in co-relation 23602. Up to 3055 conditions per place. [2024-06-03 20:14:38,152 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 142 selfloop transitions, 36 changer transitions 0/220 dead transitions. [2024-06-03 20:14:38,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 220 transitions, 2526 flow [2024-06-03 20:14:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:14:38,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-03 20:14:38,153 INFO L175 Difference]: Start difference. First operand has 158 places, 186 transitions, 2036 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:14:38,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 220 transitions, 2526 flow [2024-06-03 20:14:38,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 220 transitions, 2441 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:38,248 INFO L231 Difference]: Finished difference. Result has 160 places, 188 transitions, 2070 flow [2024-06-03 20:14:38,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2070, PETRI_PLACES=160, PETRI_TRANSITIONS=188} [2024-06-03 20:14:38,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-03 20:14:38,248 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 188 transitions, 2070 flow [2024-06-03 20:14:38,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:38,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:38,249 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 20:14:38,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:14:38,249 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:38,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:38,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1690716626, now seen corresponding path program 1 times [2024-06-03 20:14:38,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:38,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387272869] [2024-06-03 20:14:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:38,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:39,631 INFO 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 20:14:39,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:39,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387272869] [2024-06-03 20:14:39,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387272869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:39,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:39,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:14:39,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173670967] [2024-06-03 20:14:39,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:39,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:14:39,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:39,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:14:39,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:14:39,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:39,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 188 transitions, 2070 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 20:14:39,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:39,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:39,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:40,547 INFO L124 PetriNetUnfolderBase]: 2405/3590 cut-off events. [2024-06-03 20:14:40,547 INFO L125 PetriNetUnfolderBase]: For 119524/119528 co-relation queries the response was YES. [2024-06-03 20:14:40,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24794 conditions, 3590 events. 2405/3590 cut-off events. For 119524/119528 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16903 event pairs, 556 based on Foata normal form. 8/3598 useless extension candidates. Maximal degree in co-relation 24718. Up to 3320 conditions per place. [2024-06-03 20:14:40,569 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 186 selfloop transitions, 39 changer transitions 0/228 dead transitions. [2024-06-03 20:14:40,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 228 transitions, 2682 flow [2024-06-03 20:14:40,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:14:40,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-03 20:14:40,570 INFO L175 Difference]: Start difference. First operand has 160 places, 188 transitions, 2070 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:14:40,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 228 transitions, 2682 flow [2024-06-03 20:14:40,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 228 transitions, 2585 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:40,676 INFO L231 Difference]: Finished difference. Result has 163 places, 191 transitions, 2114 flow [2024-06-03 20:14:40,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2114, PETRI_PLACES=163, PETRI_TRANSITIONS=191} [2024-06-03 20:14:40,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-03 20:14:40,677 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 191 transitions, 2114 flow [2024-06-03 20:14:40,677 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 20:14:40,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:40,677 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 20:14:40,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:14:40,677 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:40,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:40,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1806007796, now seen corresponding path program 2 times [2024-06-03 20:14:40,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:40,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879137510] [2024-06-03 20:14:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:40,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:41,984 INFO 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 20:14:41,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:41,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879137510] [2024-06-03 20:14:41,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879137510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:41,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:41,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:14:41,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945934773] [2024-06-03 20:14:41,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:41,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:14:41,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:41,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:14:41,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:14:42,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:42,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 191 transitions, 2114 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 20:14:42,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:42,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:42,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:42,886 INFO L124 PetriNetUnfolderBase]: 2427/3623 cut-off events. [2024-06-03 20:14:42,886 INFO L125 PetriNetUnfolderBase]: For 126079/126079 co-relation queries the response was YES. [2024-06-03 20:14:42,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25184 conditions, 3623 events. 2427/3623 cut-off events. For 126079/126079 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17094 event pairs, 543 based on Foata normal form. 4/3627 useless extension candidates. Maximal degree in co-relation 25107. Up to 3224 conditions per place. [2024-06-03 20:14:42,913 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 172 selfloop transitions, 54 changer transitions 0/229 dead transitions. [2024-06-03 20:14:42,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 229 transitions, 2722 flow [2024-06-03 20:14:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 20:14:42,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 20:14:42,914 INFO L175 Difference]: Start difference. First operand has 163 places, 191 transitions, 2114 flow. Second operand 9 states and 153 transitions. [2024-06-03 20:14:42,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 229 transitions, 2722 flow [2024-06-03 20:14:43,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 229 transitions, 2613 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:43,040 INFO L231 Difference]: Finished difference. Result has 165 places, 194 transitions, 2181 flow [2024-06-03 20:14:43,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2181, PETRI_PLACES=165, PETRI_TRANSITIONS=194} [2024-06-03 20:14:43,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-03 20:14:43,041 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 194 transitions, 2181 flow [2024-06-03 20:14:43,041 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 20:14:43,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:43,041 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 20:14:43,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:14:43,041 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:43,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:43,041 INFO L85 PathProgramCache]: Analyzing trace with hash -38632186, now seen corresponding path program 3 times [2024-06-03 20:14:43,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:43,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406354030] [2024-06-03 20:14:43,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:43,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:44,591 INFO 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 20:14:44,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:44,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406354030] [2024-06-03 20:14:44,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406354030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:44,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:44,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:14:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689095649] [2024-06-03 20:14:44,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:44,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:14:44,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:44,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:14:44,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:14:44,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 20:14:44,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 194 transitions, 2181 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 20:14:44,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:44,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 20:14:44,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:45,517 INFO L124 PetriNetUnfolderBase]: 2321/3507 cut-off events. [2024-06-03 20:14:45,517 INFO L125 PetriNetUnfolderBase]: For 141402/141443 co-relation queries the response was YES. [2024-06-03 20:14:45,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25134 conditions, 3507 events. 2321/3507 cut-off events. For 141402/141443 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16968 event pairs, 504 based on Foata normal form. 8/3453 useless extension candidates. Maximal degree in co-relation 25056. Up to 3076 conditions per place. [2024-06-03 20:14:45,546 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 134 selfloop transitions, 48 changer transitions 0/226 dead transitions. [2024-06-03 20:14:45,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 226 transitions, 2671 flow [2024-06-03 20:14:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:45,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:14:45,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-03 20:14:45,548 INFO L175 Difference]: Start difference. First operand has 165 places, 194 transitions, 2181 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:14:45,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 226 transitions, 2671 flow [2024-06-03 20:14:45,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 226 transitions, 2525 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:45,699 INFO L231 Difference]: Finished difference. Result has 166 places, 196 transitions, 2181 flow [2024-06-03 20:14:45,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2181, PETRI_PLACES=166, PETRI_TRANSITIONS=196} [2024-06-03 20:14:45,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-03 20:14:45,699 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 196 transitions, 2181 flow [2024-06-03 20:14:45,699 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 20:14:45,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:45,699 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 20:14:45,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:14:45,700 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:45,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:45,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1660358452, now seen corresponding path program 3 times [2024-06-03 20:14:45,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:45,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851585576] [2024-06-03 20:14:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:45,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:46,966 INFO 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 20:14:46,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:46,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851585576] [2024-06-03 20:14:46,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851585576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:46,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:46,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:14:46,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993926365] [2024-06-03 20:14:46,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:46,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:14:46,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:46,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:14:46,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:14:47,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:47,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 196 transitions, 2181 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 20:14:47,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:47,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:47,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:47,964 INFO L124 PetriNetUnfolderBase]: 2474/3694 cut-off events. [2024-06-03 20:14:47,964 INFO L125 PetriNetUnfolderBase]: For 142841/142841 co-relation queries the response was YES. [2024-06-03 20:14:47,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26232 conditions, 3694 events. 2474/3694 cut-off events. For 142841/142841 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17509 event pairs, 542 based on Foata normal form. 4/3698 useless extension candidates. Maximal degree in co-relation 26153. Up to 3295 conditions per place. [2024-06-03 20:14:47,995 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 56 changer transitions 0/235 dead transitions. [2024-06-03 20:14:47,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 235 transitions, 2811 flow [2024-06-03 20:14:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 20:14:47,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 20:14:47,997 INFO L175 Difference]: Start difference. First operand has 166 places, 196 transitions, 2181 flow. Second operand 9 states and 153 transitions. [2024-06-03 20:14:47,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 235 transitions, 2811 flow [2024-06-03 20:14:48,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 235 transitions, 2685 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:48,158 INFO L231 Difference]: Finished difference. Result has 169 places, 199 transitions, 2241 flow [2024-06-03 20:14:48,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2241, PETRI_PLACES=169, PETRI_TRANSITIONS=199} [2024-06-03 20:14:48,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-03 20:14:48,159 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 199 transitions, 2241 flow [2024-06-03 20:14:48,159 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 20:14:48,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:48,159 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 20:14:48,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:14:48,159 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:48,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:48,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1806187286, now seen corresponding path program 4 times [2024-06-03 20:14:48,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:48,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499545117] [2024-06-03 20:14:48,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:48,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:49,182 INFO 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 20:14:49,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:49,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499545117] [2024-06-03 20:14:49,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499545117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:49,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:49,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:49,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739924647] [2024-06-03 20:14:49,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:49,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:49,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:49,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:49,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:49,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:49,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 199 transitions, 2241 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:49,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:49,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:49,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:50,025 INFO L124 PetriNetUnfolderBase]: 2496/3732 cut-off events. [2024-06-03 20:14:50,025 INFO L125 PetriNetUnfolderBase]: For 150938/150946 co-relation queries the response was YES. [2024-06-03 20:14:50,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26687 conditions, 3732 events. 2496/3732 cut-off events. For 150938/150946 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17736 event pairs, 546 based on Foata normal form. 8/3740 useless extension candidates. Maximal degree in co-relation 26607. Up to 2975 conditions per place. [2024-06-03 20:14:50,055 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 136 selfloop transitions, 96 changer transitions 0/235 dead transitions. [2024-06-03 20:14:50,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 235 transitions, 3003 flow [2024-06-03 20:14:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:14:50,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:14:50,056 INFO L175 Difference]: Start difference. First operand has 169 places, 199 transitions, 2241 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:14:50,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 235 transitions, 3003 flow [2024-06-03 20:14:50,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 235 transitions, 2847 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:50,235 INFO L231 Difference]: Finished difference. Result has 170 places, 202 transitions, 2352 flow [2024-06-03 20:14:50,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2352, PETRI_PLACES=170, PETRI_TRANSITIONS=202} [2024-06-03 20:14:50,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-03 20:14:50,235 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 202 transitions, 2352 flow [2024-06-03 20:14:50,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:50,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:50,236 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 20:14:50,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:14:50,236 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 20:14:50,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:50,236 INFO L85 PathProgramCache]: Analyzing trace with hash -436681217, now seen corresponding path program 1 times [2024-06-03 20:14:50,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:50,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064331360] [2024-06-03 20:14:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:50,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:51,097 INFO 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 20:14:51,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:51,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064331360] [2024-06-03 20:14:51,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064331360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:51,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:51,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:51,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769163148] [2024-06-03 20:14:51,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:51,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:51,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:51,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:51,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:51,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:51,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 202 transitions, 2352 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 20:14:51,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:51,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:51,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:51,983 INFO L124 PetriNetUnfolderBase]: 2526/3767 cut-off events. [2024-06-03 20:14:51,983 INFO L125 PetriNetUnfolderBase]: For 157711/157715 co-relation queries the response was YES. [2024-06-03 20:14:52,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27261 conditions, 3767 events. 2526/3767 cut-off events. For 157711/157715 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17865 event pairs, 693 based on Foata normal form. 8/3775 useless extension candidates. Maximal degree in co-relation 27180. Up to 3629 conditions per place. [2024-06-03 20:14:52,016 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 201 selfloop transitions, 33 changer transitions 0/237 dead transitions. [2024-06-03 20:14:52,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 237 transitions, 3085 flow [2024-06-03 20:14:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:52,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 20:14:52,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-03 20:14:52,019 INFO L175 Difference]: Start difference. First operand has 170 places, 202 transitions, 2352 flow. Second operand 7 states and 118 transitions. [2024-06-03 20:14:52,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 237 transitions, 3085 flow [2024-06-03 20:14:52,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 237 transitions, 2857 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:52,200 INFO L231 Difference]: Finished difference. Result has 173 places, 213 transitions, 2332 flow [2024-06-03 20:14:52,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2332, PETRI_PLACES=173, PETRI_TRANSITIONS=213} [2024-06-03 20:14:52,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-03 20:14:52,201 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 213 transitions, 2332 flow [2024-06-03 20:14:52,201 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 20:14:52,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:52,201 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 20:14:52,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:14:52,201 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:52,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:52,201 INFO L85 PathProgramCache]: Analyzing trace with hash 487384806, now seen corresponding path program 4 times [2024-06-03 20:14:52,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:52,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084943413] [2024-06-03 20:14:52,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:52,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:53,650 INFO 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 20:14:53,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:53,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084943413] [2024-06-03 20:14:53,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084943413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:53,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:53,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:53,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523304367] [2024-06-03 20:14:53,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:53,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:53,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:53,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:53,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 20:14:53,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 213 transitions, 2332 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:53,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:53,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 20:14:53,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:54,468 INFO L124 PetriNetUnfolderBase]: 2384/3602 cut-off events. [2024-06-03 20:14:54,468 INFO L125 PetriNetUnfolderBase]: For 170180/170227 co-relation queries the response was YES. [2024-06-03 20:14:54,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26405 conditions, 3602 events. 2384/3602 cut-off events. For 170180/170227 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17404 event pairs, 520 based on Foata normal form. 11/3548 useless extension candidates. Maximal degree in co-relation 26322. Up to 3097 conditions per place. [2024-06-03 20:14:54,495 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 61 changer transitions 0/244 dead transitions. [2024-06-03 20:14:54,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 244 transitions, 2856 flow [2024-06-03 20:14:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:14:54,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-03 20:14:54,496 INFO L175 Difference]: Start difference. First operand has 173 places, 213 transitions, 2332 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:14:54,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 244 transitions, 2856 flow [2024-06-03 20:14:54,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 244 transitions, 2814 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-03 20:14:54,687 INFO L231 Difference]: Finished difference. Result has 179 places, 215 transitions, 2466 flow [2024-06-03 20:14:54,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2466, PETRI_PLACES=179, PETRI_TRANSITIONS=215} [2024-06-03 20:14:54,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-03 20:14:54,688 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 215 transitions, 2466 flow [2024-06-03 20:14:54,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:54,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:54,688 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 20:14:54,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:14:54,688 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 20:14:54,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:54,689 INFO L85 PathProgramCache]: Analyzing trace with hash 487562746, now seen corresponding path program 5 times [2024-06-03 20:14:54,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:54,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965078622] [2024-06-03 20:14:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:54,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:56,022 INFO 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 20:14:56,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:56,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965078622] [2024-06-03 20:14:56,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965078622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:56,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:56,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:56,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387264120] [2024-06-03 20:14:56,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:56,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:56,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:56,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:56,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:56,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:56,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 215 transitions, 2466 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 20:14:56,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:56,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:56,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:56,928 INFO L124 PetriNetUnfolderBase]: 2535/3787 cut-off events. [2024-06-03 20:14:56,928 INFO L125 PetriNetUnfolderBase]: For 171408/171418 co-relation queries the response was YES. [2024-06-03 20:14:56,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27747 conditions, 3787 events. 2535/3787 cut-off events. For 171408/171418 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18048 event pairs, 553 based on Foata normal form. 9/3796 useless extension candidates. Maximal degree in co-relation 27662. Up to 3228 conditions per place. [2024-06-03 20:14:56,960 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 179 selfloop transitions, 72 changer transitions 0/254 dead transitions. [2024-06-03 20:14:56,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 254 transitions, 3130 flow [2024-06-03 20:14:56,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 20:14:56,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-03 20:14:56,961 INFO L175 Difference]: Start difference. First operand has 179 places, 215 transitions, 2466 flow. Second operand 9 states and 157 transitions. [2024-06-03 20:14:56,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 254 transitions, 3130 flow [2024-06-03 20:14:57,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 254 transitions, 2974 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:57,130 INFO L231 Difference]: Finished difference. Result has 182 places, 218 transitions, 2524 flow [2024-06-03 20:14:57,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2310, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2524, PETRI_PLACES=182, PETRI_TRANSITIONS=218} [2024-06-03 20:14:57,131 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-03 20:14:57,131 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 218 transitions, 2524 flow [2024-06-03 20:14:57,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 20:14:57,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:57,131 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 20:14:57,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:14:57,131 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 20:14:57,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:57,132 INFO L85 PathProgramCache]: Analyzing trace with hash -144599926, now seen corresponding path program 6 times [2024-06-03 20:14:57,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:57,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512732677] [2024-06-03 20:14:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:57,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:58,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:58,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512732677] [2024-06-03 20:14:58,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512732677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:58,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:58,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:58,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155274608] [2024-06-03 20:14:58,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:58,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:58,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:58,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:58,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:58,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:14:58,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 218 transitions, 2524 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 20:14:58,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:58,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:14:58,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:59,343 INFO L124 PetriNetUnfolderBase]: 2557/3819 cut-off events. [2024-06-03 20:14:59,343 INFO L125 PetriNetUnfolderBase]: For 179491/179501 co-relation queries the response was YES. [2024-06-03 20:14:59,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28198 conditions, 3819 events. 2557/3819 cut-off events. For 179491/179501 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18147 event pairs, 545 based on Foata normal form. 9/3828 useless extension candidates. Maximal degree in co-relation 28112. Up to 3000 conditions per place. [2024-06-03 20:14:59,375 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 157 selfloop transitions, 98 changer transitions 0/258 dead transitions. [2024-06-03 20:14:59,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 258 transitions, 3354 flow [2024-06-03 20:14:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 20:14:59,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-03 20:14:59,377 INFO L175 Difference]: Start difference. First operand has 182 places, 218 transitions, 2524 flow. Second operand 9 states and 159 transitions. [2024-06-03 20:14:59,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 258 transitions, 3354 flow [2024-06-03 20:14:59,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 258 transitions, 3170 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:59,598 INFO L231 Difference]: Finished difference. Result has 184 places, 221 transitions, 2606 flow [2024-06-03 20:14:59,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2606, PETRI_PLACES=184, PETRI_TRANSITIONS=221} [2024-06-03 20:14:59,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-03 20:14:59,598 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 221 transitions, 2606 flow [2024-06-03 20:14:59,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 20:14:59,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:59,598 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 20:14:59,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:14:59,598 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 20:14:59,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:59,599 INFO L85 PathProgramCache]: Analyzing trace with hash 487389766, now seen corresponding path program 7 times [2024-06-03 20:14:59,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:59,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294915084] [2024-06-03 20:14:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:59,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:00,901 INFO 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 20:15:00,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:00,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294915084] [2024-06-03 20:15:00,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294915084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:00,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:00,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:00,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272552399] [2024-06-03 20:15:00,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:00,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:00,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:00,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:00,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:01,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:01,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 221 transitions, 2606 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 20:15:01,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:01,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:01,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:01,878 INFO L124 PetriNetUnfolderBase]: 2547/3805 cut-off events. [2024-06-03 20:15:01,878 INFO L125 PetriNetUnfolderBase]: For 184823/184833 co-relation queries the response was YES. [2024-06-03 20:15:01,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28219 conditions, 3805 events. 2547/3805 cut-off events. For 184823/184833 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18104 event pairs, 560 based on Foata normal form. 9/3814 useless extension candidates. Maximal degree in co-relation 28132. Up to 3246 conditions per place. [2024-06-03 20:15:01,910 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 179 selfloop transitions, 73 changer transitions 0/255 dead transitions. [2024-06-03 20:15:01,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 255 transitions, 3210 flow [2024-06-03 20:15:01,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 20:15:01,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-03 20:15:01,911 INFO L175 Difference]: Start difference. First operand has 184 places, 221 transitions, 2606 flow. Second operand 9 states and 154 transitions. [2024-06-03 20:15:01,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 255 transitions, 3210 flow [2024-06-03 20:15:02,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 255 transitions, 3001 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 20:15:02,205 INFO L231 Difference]: Finished difference. Result has 187 places, 221 transitions, 2551 flow [2024-06-03 20:15:02,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2551, PETRI_PLACES=187, PETRI_TRANSITIONS=221} [2024-06-03 20:15:02,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-03 20:15:02,206 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 221 transitions, 2551 flow [2024-06-03 20:15:02,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 20:15:02,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:02,209 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 20:15:02,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:15:02,209 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 20:15:02,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:02,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1033442119, now seen corresponding path program 2 times [2024-06-03 20:15:02,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:02,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605746743] [2024-06-03 20:15:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:02,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:03,138 INFO 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 20:15:03,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:03,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605746743] [2024-06-03 20:15:03,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605746743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:03,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:03,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:15:03,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695887389] [2024-06-03 20:15:03,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:03,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:15:03,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:03,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:15:03,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:15:03,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:03,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 221 transitions, 2551 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 20:15:03,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:03,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:03,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:03,948 INFO L124 PetriNetUnfolderBase]: 2567/3826 cut-off events. [2024-06-03 20:15:03,949 INFO L125 PetriNetUnfolderBase]: For 192115/192119 co-relation queries the response was YES. [2024-06-03 20:15:03,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28355 conditions, 3826 events. 2567/3826 cut-off events. For 192115/192119 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 18244 event pairs, 700 based on Foata normal form. 8/3834 useless extension candidates. Maximal degree in co-relation 28267. Up to 3716 conditions per place. [2024-06-03 20:15:03,978 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 211 selfloop transitions, 28 changer transitions 0/242 dead transitions. [2024-06-03 20:15:03,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 242 transitions, 3129 flow [2024-06-03 20:15:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:15:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:15:03,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-03 20:15:03,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-03 20:15:03,979 INFO L175 Difference]: Start difference. First operand has 187 places, 221 transitions, 2551 flow. Second operand 5 states and 92 transitions. [2024-06-03 20:15:03,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 242 transitions, 3129 flow [2024-06-03 20:15:04,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 242 transitions, 2865 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-03 20:15:04,196 INFO L231 Difference]: Finished difference. Result has 183 places, 224 transitions, 2413 flow [2024-06-03 20:15:04,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2413, PETRI_PLACES=183, PETRI_TRANSITIONS=224} [2024-06-03 20:15:04,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-03 20:15:04,197 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 224 transitions, 2413 flow [2024-06-03 20:15:04,197 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 20:15:04,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:04,197 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 20:15:04,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:15:04,197 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 20:15:04,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:04,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1081117085, now seen corresponding path program 3 times [2024-06-03 20:15:04,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:04,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739216991] [2024-06-03 20:15:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:04,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:05,029 INFO 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 20:15:05,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:05,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739216991] [2024-06-03 20:15:05,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739216991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:05,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:05,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:15:05,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811426924] [2024-06-03 20:15:05,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:05,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:15:05,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:05,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:15:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:15:05,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:05,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 224 transitions, 2413 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 20:15:05,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:05,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:05,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:05,962 INFO L124 PetriNetUnfolderBase]: 2555/3810 cut-off events. [2024-06-03 20:15:05,962 INFO L125 PetriNetUnfolderBase]: For 195329/195333 co-relation queries the response was YES. [2024-06-03 20:15:05,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27831 conditions, 3810 events. 2555/3810 cut-off events. For 195329/195333 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18061 event pairs, 694 based on Foata normal form. 8/3818 useless extension candidates. Maximal degree in co-relation 27742. Up to 3668 conditions per place. [2024-06-03 20:15:05,996 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 208 selfloop transitions, 34 changer transitions 0/245 dead transitions. [2024-06-03 20:15:05,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 245 transitions, 2965 flow [2024-06-03 20:15:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:15:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:15:05,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-03 20:15:05,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 20:15:05,997 INFO L175 Difference]: Start difference. First operand has 183 places, 224 transitions, 2413 flow. Second operand 6 states and 105 transitions. [2024-06-03 20:15:05,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 245 transitions, 2965 flow [2024-06-03 20:15:06,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 245 transitions, 2891 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 20:15:06,278 INFO L231 Difference]: Finished difference. Result has 186 places, 224 transitions, 2419 flow [2024-06-03 20:15:06,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2419, PETRI_PLACES=186, PETRI_TRANSITIONS=224} [2024-06-03 20:15:06,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-03 20:15:06,279 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 224 transitions, 2419 flow [2024-06-03 20:15:06,279 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 20:15:06,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:06,279 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 20:15:06,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:15:06,280 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:06,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:06,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1811834565, now seen corresponding path program 1 times [2024-06-03 20:15:06,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:06,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707035242] [2024-06-03 20:15:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:06,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:07,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:07,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707035242] [2024-06-03 20:15:07,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707035242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:07,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:07,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:15:07,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127601372] [2024-06-03 20:15:07,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:07,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:15:07,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:07,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:15:07,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:15:07,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:07,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 224 transitions, 2419 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:07,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:07,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:07,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:07,784 INFO L124 PetriNetUnfolderBase]: 2586/3865 cut-off events. [2024-06-03 20:15:07,784 INFO L125 PetriNetUnfolderBase]: For 206498/206498 co-relation queries the response was YES. [2024-06-03 20:15:07,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28395 conditions, 3865 events. 2586/3865 cut-off events. For 206498/206498 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18643 event pairs, 1122 based on Foata normal form. 3/3868 useless extension candidates. Maximal degree in co-relation 28305. Up to 3773 conditions per place. [2024-06-03 20:15:07,818 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 225 selfloop transitions, 25 changer transitions 0/253 dead transitions. [2024-06-03 20:15:07,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 253 transitions, 3212 flow [2024-06-03 20:15:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:15:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:15:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-03 20:15:07,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-03 20:15:07,820 INFO L175 Difference]: Start difference. First operand has 186 places, 224 transitions, 2419 flow. Second operand 8 states and 125 transitions. [2024-06-03 20:15:07,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 253 transitions, 3212 flow [2024-06-03 20:15:08,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 253 transitions, 3129 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:08,053 INFO L231 Difference]: Finished difference. Result has 190 places, 232 transitions, 2514 flow [2024-06-03 20:15:08,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2514, PETRI_PLACES=190, PETRI_TRANSITIONS=232} [2024-06-03 20:15:08,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-03 20:15:08,054 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 232 transitions, 2514 flow [2024-06-03 20:15:08,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:08,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:08,054 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 20:15:08,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:15:08,055 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:08,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:08,055 INFO L85 PathProgramCache]: Analyzing trace with hash -837686171, now seen corresponding path program 2 times [2024-06-03 20:15:08,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:08,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158689974] [2024-06-03 20:15:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:08,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:08,785 INFO 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 20:15:08,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:08,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158689974] [2024-06-03 20:15:08,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158689974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:08,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:08,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:15:08,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279161087] [2024-06-03 20:15:08,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:08,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:15:08,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:08,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:15:08,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:15:08,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:08,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 232 transitions, 2514 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 20:15:08,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:08,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:08,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:09,643 INFO L124 PetriNetUnfolderBase]: 2616/3907 cut-off events. [2024-06-03 20:15:09,643 INFO L125 PetriNetUnfolderBase]: For 207946/207946 co-relation queries the response was YES. [2024-06-03 20:15:09,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28907 conditions, 3907 events. 2616/3907 cut-off events. For 207946/207946 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18863 event pairs, 1123 based on Foata normal form. 3/3910 useless extension candidates. Maximal degree in co-relation 28816. Up to 3831 conditions per place. [2024-06-03 20:15:09,679 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 230 selfloop transitions, 24 changer transitions 0/257 dead transitions. [2024-06-03 20:15:09,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 257 transitions, 3186 flow [2024-06-03 20:15:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:15:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:15:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-03 20:15:09,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 20:15:09,680 INFO L175 Difference]: Start difference. First operand has 190 places, 232 transitions, 2514 flow. Second operand 7 states and 112 transitions. [2024-06-03 20:15:09,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 257 transitions, 3186 flow [2024-06-03 20:15:09,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 257 transitions, 3119 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-03 20:15:09,996 INFO L231 Difference]: Finished difference. Result has 194 places, 240 transitions, 2599 flow [2024-06-03 20:15:09,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2599, PETRI_PLACES=194, PETRI_TRANSITIONS=240} [2024-06-03 20:15:09,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-03 20:15:09,997 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 240 transitions, 2599 flow [2024-06-03 20:15:09,997 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 20:15:09,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:09,997 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 20:15:09,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:15:09,997 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:09,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:09,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1081332163, now seen corresponding path program 3 times [2024-06-03 20:15:09,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:09,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162573838] [2024-06-03 20:15:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:09,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:10,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:10,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162573838] [2024-06-03 20:15:10,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162573838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:10,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:10,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:15:10,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487535003] [2024-06-03 20:15:10,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:10,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:15:10,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:10,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:15:10,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:15:10,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:10,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 240 transitions, 2599 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 20:15:10,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:10,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:10,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:11,489 INFO L124 PetriNetUnfolderBase]: 2607/3895 cut-off events. [2024-06-03 20:15:11,489 INFO L125 PetriNetUnfolderBase]: For 213274/213274 co-relation queries the response was YES. [2024-06-03 20:15:11,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28884 conditions, 3895 events. 2607/3895 cut-off events. For 213274/213274 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18817 event pairs, 1124 based on Foata normal form. 3/3898 useless extension candidates. Maximal degree in co-relation 28791. Up to 3819 conditions per place. [2024-06-03 20:15:11,521 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 22 changer transitions 0/258 dead transitions. [2024-06-03 20:15:11,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 258 transitions, 3188 flow [2024-06-03 20:15:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:15:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:15:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-03 20:15:11,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-03 20:15:11,522 INFO L175 Difference]: Start difference. First operand has 194 places, 240 transitions, 2599 flow. Second operand 6 states and 103 transitions. [2024-06-03 20:15:11,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 258 transitions, 3188 flow [2024-06-03 20:15:11,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 258 transitions, 3089 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-03 20:15:11,835 INFO L231 Difference]: Finished difference. Result has 196 places, 240 transitions, 2555 flow [2024-06-03 20:15:11,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2555, PETRI_PLACES=196, PETRI_TRANSITIONS=240} [2024-06-03 20:15:11,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-03 20:15:11,836 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 240 transitions, 2555 flow [2024-06-03 20:15:11,836 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 20:15:11,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:11,836 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 20:15:11,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:15:11,836 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:11,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:11,836 INFO L85 PathProgramCache]: Analyzing trace with hash -919592379, now seen corresponding path program 1 times [2024-06-03 20:15:11,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:11,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059667576] [2024-06-03 20:15:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:11,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:12,718 INFO 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 20:15:12,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:12,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059667576] [2024-06-03 20:15:12,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059667576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:12,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:12,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:15:12,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594995482] [2024-06-03 20:15:12,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:12,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:15:12,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:12,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:15:12,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:15:12,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:12,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 240 transitions, 2555 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 20:15:12,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:12,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:12,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:13,499 INFO L124 PetriNetUnfolderBase]: 2601/3887 cut-off events. [2024-06-03 20:15:13,499 INFO L125 PetriNetUnfolderBase]: For 218419/218419 co-relation queries the response was YES. [2024-06-03 20:15:13,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28828 conditions, 3887 events. 2601/3887 cut-off events. For 218419/218419 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18726 event pairs, 1112 based on Foata normal form. 2/3889 useless extension candidates. Maximal degree in co-relation 28734. Up to 3810 conditions per place. [2024-06-03 20:15:13,540 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 227 selfloop transitions, 25 changer transitions 0/255 dead transitions. [2024-06-03 20:15:13,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 3139 flow [2024-06-03 20:15:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:15:13,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:15:13,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-03 20:15:13,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-03 20:15:13,541 INFO L175 Difference]: Start difference. First operand has 196 places, 240 transitions, 2555 flow. Second operand 5 states and 88 transitions. [2024-06-03 20:15:13,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 3139 flow [2024-06-03 20:15:13,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 255 transitions, 3084 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:13,833 INFO L231 Difference]: Finished difference. Result has 196 places, 243 transitions, 2622 flow [2024-06-03 20:15:13,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2622, PETRI_PLACES=196, PETRI_TRANSITIONS=243} [2024-06-03 20:15:13,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-03 20:15:13,834 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 243 transitions, 2622 flow [2024-06-03 20:15:13,834 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 20:15:13,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:13,834 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 20:15:13,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:15:13,834 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:13,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:13,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1081578427, now seen corresponding path program 1 times [2024-06-03 20:15:13,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:13,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689360161] [2024-06-03 20:15:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:13,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:14,936 INFO 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 20:15:14,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:14,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689360161] [2024-06-03 20:15:14,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689360161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:14,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:14,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:15:14,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526977374] [2024-06-03 20:15:14,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:14,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:15:14,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:14,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:15:14,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:15:14,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:14,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 243 transitions, 2622 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 20:15:14,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:14,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:14,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:15,727 INFO L124 PetriNetUnfolderBase]: 2596/3880 cut-off events. [2024-06-03 20:15:15,727 INFO L125 PetriNetUnfolderBase]: For 224114/224114 co-relation queries the response was YES. [2024-06-03 20:15:15,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29193 conditions, 3880 events. 2596/3880 cut-off events. For 224114/224114 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18633 event pairs, 1113 based on Foata normal form. 2/3882 useless extension candidates. Maximal degree in co-relation 29098. Up to 3832 conditions per place. [2024-06-03 20:15:15,761 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 239 selfloop transitions, 12 changer transitions 0/254 dead transitions. [2024-06-03 20:15:15,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 254 transitions, 3176 flow [2024-06-03 20:15:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:15:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:15:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-03 20:15:15,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-03 20:15:15,762 INFO L175 Difference]: Start difference. First operand has 196 places, 243 transitions, 2622 flow. Second operand 5 states and 82 transitions. [2024-06-03 20:15:15,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 254 transitions, 3176 flow [2024-06-03 20:15:16,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 254 transitions, 3118 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 20:15:16,054 INFO L231 Difference]: Finished difference. Result has 198 places, 245 transitions, 2625 flow [2024-06-03 20:15:16,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2564, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2625, PETRI_PLACES=198, PETRI_TRANSITIONS=245} [2024-06-03 20:15:16,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-03 20:15:16,054 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 245 transitions, 2625 flow [2024-06-03 20:15:16,054 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 20:15:16,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:16,054 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 20:15:16,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:15:16,055 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:16,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash -733714691, now seen corresponding path program 1 times [2024-06-03 20:15:16,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:16,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240802565] [2024-06-03 20:15:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:16,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:17,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:17,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240802565] [2024-06-03 20:15:17,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240802565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:17,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:17,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:15:17,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028211639] [2024-06-03 20:15:17,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:17,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:15:17,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:17,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:15:17,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:15:17,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:17,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 245 transitions, 2625 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 20:15:17,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:17,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:17,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:18,477 INFO L124 PetriNetUnfolderBase]: 2662/3976 cut-off events. [2024-06-03 20:15:18,477 INFO L125 PetriNetUnfolderBase]: For 234433/234437 co-relation queries the response was YES. [2024-06-03 20:15:18,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29979 conditions, 3976 events. 2662/3976 cut-off events. For 234433/234437 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 19184 event pairs, 527 based on Foata normal form. 8/3984 useless extension candidates. Maximal degree in co-relation 29883. Up to 3759 conditions per place. [2024-06-03 20:15:18,513 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 257 selfloop transitions, 37 changer transitions 0/297 dead transitions. [2024-06-03 20:15:18,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 297 transitions, 3472 flow [2024-06-03 20:15:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-03 20:15:18,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-03 20:15:18,514 INFO L175 Difference]: Start difference. First operand has 198 places, 245 transitions, 2625 flow. Second operand 10 states and 164 transitions. [2024-06-03 20:15:18,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 297 transitions, 3472 flow [2024-06-03 20:15:18,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 297 transitions, 3427 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 20:15:18,853 INFO L231 Difference]: Finished difference. Result has 208 places, 257 transitions, 2836 flow [2024-06-03 20:15:18,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2836, PETRI_PLACES=208, PETRI_TRANSITIONS=257} [2024-06-03 20:15:18,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-03 20:15:18,854 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 257 transitions, 2836 flow [2024-06-03 20:15:18,854 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 20:15:18,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:18,855 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 20:15:18,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:15:18,855 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:18,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:18,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1424229625, now seen corresponding path program 2 times [2024-06-03 20:15:18,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:18,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994708173] [2024-06-03 20:15:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:18,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:20,242 INFO 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 20:15:20,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:20,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994708173] [2024-06-03 20:15:20,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994708173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:20,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:20,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:15:20,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089190064] [2024-06-03 20:15:20,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:20,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:15:20,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:20,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:15:20,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:15:20,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:20,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 257 transitions, 2836 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 20:15:20,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:20,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:20,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:21,222 INFO L124 PetriNetUnfolderBase]: 2679/4003 cut-off events. [2024-06-03 20:15:21,222 INFO L125 PetriNetUnfolderBase]: For 246982/246984 co-relation queries the response was YES. [2024-06-03 20:15:21,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30903 conditions, 4003 events. 2679/4003 cut-off events. For 246982/246984 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19353 event pairs, 539 based on Foata normal form. 6/4009 useless extension candidates. Maximal degree in co-relation 30803. Up to 3787 conditions per place. [2024-06-03 20:15:21,256 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 256 selfloop transitions, 39 changer transitions 0/298 dead transitions. [2024-06-03 20:15:21,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 298 transitions, 3599 flow [2024-06-03 20:15:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:21,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-03 20:15:21,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-03 20:15:21,257 INFO L175 Difference]: Start difference. First operand has 208 places, 257 transitions, 2836 flow. Second operand 10 states and 167 transitions. [2024-06-03 20:15:21,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 298 transitions, 3599 flow [2024-06-03 20:15:21,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 298 transitions, 3504 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-03 20:15:21,601 INFO L231 Difference]: Finished difference. Result has 215 places, 259 transitions, 2876 flow [2024-06-03 20:15:21,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2741, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2876, PETRI_PLACES=215, PETRI_TRANSITIONS=259} [2024-06-03 20:15:21,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-03 20:15:21,602 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 259 transitions, 2876 flow [2024-06-03 20:15:21,602 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 20:15:21,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:21,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:21,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:15:21,603 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:21,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:21,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1424225905, now seen corresponding path program 3 times [2024-06-03 20:15:21,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:21,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916554396] [2024-06-03 20:15:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:21,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:23,411 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 20:15:23,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:23,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916554396] [2024-06-03 20:15:23,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916554396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:23,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:23,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:15:23,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586775386] [2024-06-03 20:15:23,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:23,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:15:23,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:23,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:15:23,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:15:23,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:23,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 259 transitions, 2876 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 20:15:23,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:23,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:23,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:24,533 INFO L124 PetriNetUnfolderBase]: 2713/4055 cut-off events. [2024-06-03 20:15:24,533 INFO L125 PetriNetUnfolderBase]: For 258231/258233 co-relation queries the response was YES. [2024-06-03 20:15:24,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31602 conditions, 4055 events. 2713/4055 cut-off events. For 258231/258233 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19673 event pairs, 530 based on Foata normal form. 6/4061 useless extension candidates. Maximal degree in co-relation 31500. Up to 3782 conditions per place. [2024-06-03 20:15:24,575 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 252 selfloop transitions, 47 changer transitions 0/302 dead transitions. [2024-06-03 20:15:24,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 302 transitions, 3679 flow [2024-06-03 20:15:24,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-03 20:15:24,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-03 20:15:24,577 INFO L175 Difference]: Start difference. First operand has 215 places, 259 transitions, 2876 flow. Second operand 10 states and 169 transitions. [2024-06-03 20:15:24,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 302 transitions, 3679 flow [2024-06-03 20:15:24,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 302 transitions, 3562 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:24,937 INFO L231 Difference]: Finished difference. Result has 218 places, 263 transitions, 2950 flow [2024-06-03 20:15:24,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2950, PETRI_PLACES=218, PETRI_TRANSITIONS=263} [2024-06-03 20:15:24,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-03 20:15:24,938 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 263 transitions, 2950 flow [2024-06-03 20:15:24,938 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 20:15:24,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:24,938 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 20:15:24,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:15:24,938 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 20:15:24,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:24,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1422351955, now seen corresponding path program 4 times [2024-06-03 20:15:24,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:24,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875633514] [2024-06-03 20:15:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:24,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:26,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:26,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875633514] [2024-06-03 20:15:26,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875633514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:26,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:26,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:15:26,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887076351] [2024-06-03 20:15:26,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:26,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:15:26,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:26,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:15:26,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:15:26,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:26,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 263 transitions, 2950 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 20:15:26,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:26,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:26,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:27,499 INFO L124 PetriNetUnfolderBase]: 2798/4196 cut-off events. [2024-06-03 20:15:27,499 INFO L125 PetriNetUnfolderBase]: For 269693/269695 co-relation queries the response was YES. [2024-06-03 20:15:27,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32651 conditions, 4196 events. 2798/4196 cut-off events. For 269693/269695 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 20699 event pairs, 535 based on Foata normal form. 6/4202 useless extension candidates. Maximal degree in co-relation 32547. Up to 3942 conditions per place. [2024-06-03 20:15:27,537 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 269 selfloop transitions, 43 changer transitions 0/315 dead transitions. [2024-06-03 20:15:27,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 315 transitions, 3863 flow [2024-06-03 20:15:27,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:27,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-03 20:15:27,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-03 20:15:27,539 INFO L175 Difference]: Start difference. First operand has 218 places, 263 transitions, 2950 flow. Second operand 10 states and 166 transitions. [2024-06-03 20:15:27,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 315 transitions, 3863 flow [2024-06-03 20:15:27,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 315 transitions, 3758 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:27,936 INFO L231 Difference]: Finished difference. Result has 225 places, 275 transitions, 3131 flow [2024-06-03 20:15:27,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2845, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3131, PETRI_PLACES=225, PETRI_TRANSITIONS=275} [2024-06-03 20:15:27,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-03 20:15:27,937 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 275 transitions, 3131 flow [2024-06-03 20:15:27,937 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 20:15:27,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:27,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:27,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:15:27,937 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 20:15:27,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:27,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1511071537, now seen corresponding path program 1 times [2024-06-03 20:15:27,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:27,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110368959] [2024-06-03 20:15:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:27,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:29,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:29,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110368959] [2024-06-03 20:15:29,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110368959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:29,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:29,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:15:29,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282488343] [2024-06-03 20:15:29,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:29,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:15:29,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:29,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:15:29,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:15:29,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:29,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 275 transitions, 3131 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 20:15:29,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:29,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:29,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:30,549 INFO L124 PetriNetUnfolderBase]: 2895/4355 cut-off events. [2024-06-03 20:15:30,550 INFO L125 PetriNetUnfolderBase]: For 302081/302083 co-relation queries the response was YES. [2024-06-03 20:15:30,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33905 conditions, 4355 events. 2895/4355 cut-off events. For 302081/302083 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21780 event pairs, 542 based on Foata normal form. 22/4377 useless extension candidates. Maximal degree in co-relation 33797. Up to 4008 conditions per place. [2024-06-03 20:15:30,591 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 283 selfloop transitions, 41 changer transitions 0/327 dead transitions. [2024-06-03 20:15:30,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 327 transitions, 3993 flow [2024-06-03 20:15:30,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:15:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:15:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-03 20:15:30,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-03 20:15:30,593 INFO L175 Difference]: Start difference. First operand has 225 places, 275 transitions, 3131 flow. Second operand 11 states and 185 transitions. [2024-06-03 20:15:30,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 327 transitions, 3993 flow [2024-06-03 20:15:30,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 327 transitions, 3864 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:30,997 INFO L231 Difference]: Finished difference. Result has 232 places, 279 transitions, 3146 flow [2024-06-03 20:15:30,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3002, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3146, PETRI_PLACES=232, PETRI_TRANSITIONS=279} [2024-06-03 20:15:30,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-03 20:15:30,998 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 279 transitions, 3146 flow [2024-06-03 20:15:30,998 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 20:15:30,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:30,998 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 20:15:30,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:15:30,998 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:30,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:30,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1067960957, now seen corresponding path program 5 times [2024-06-03 20:15:30,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:30,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214252138] [2024-06-03 20:15:30,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:30,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:32,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:32,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214252138] [2024-06-03 20:15:32,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214252138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:32,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:32,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:15:32,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896513458] [2024-06-03 20:15:32,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:32,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:15:32,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:32,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:15:32,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:15:32,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:32,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 279 transitions, 3146 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 20:15:32,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:32,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:32,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:33,867 INFO L124 PetriNetUnfolderBase]: 3088/4638 cut-off events. [2024-06-03 20:15:33,867 INFO L125 PetriNetUnfolderBase]: For 294716/294716 co-relation queries the response was YES. [2024-06-03 20:15:33,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36017 conditions, 4638 events. 3088/4638 cut-off events. For 294716/294716 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23399 event pairs, 559 based on Foata normal form. 4/4642 useless extension candidates. Maximal degree in co-relation 35906. Up to 4242 conditions per place. [2024-06-03 20:15:33,915 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 284 selfloop transitions, 61 changer transitions 0/348 dead transitions. [2024-06-03 20:15:33,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 348 transitions, 4387 flow [2024-06-03 20:15:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:33,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:33,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-03 20:15:33,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 20:15:33,916 INFO L175 Difference]: Start difference. First operand has 232 places, 279 transitions, 3146 flow. Second operand 10 states and 170 transitions. [2024-06-03 20:15:33,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 348 transitions, 4387 flow [2024-06-03 20:15:34,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 348 transitions, 4294 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:34,553 INFO L231 Difference]: Finished difference. Result has 237 places, 305 transitions, 3633 flow [2024-06-03 20:15:34,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3633, PETRI_PLACES=237, PETRI_TRANSITIONS=305} [2024-06-03 20:15:34,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-03 20:15:34,554 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 305 transitions, 3633 flow [2024-06-03 20:15:34,554 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 20:15:34,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:34,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:34,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:15:34,554 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:34,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:34,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1067955005, now seen corresponding path program 2 times [2024-06-03 20:15:34,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:34,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889690367] [2024-06-03 20:15:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:34,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:36,030 INFO 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 20:15:36,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:36,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889690367] [2024-06-03 20:15:36,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889690367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:36,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:36,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:15:36,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256812726] [2024-06-03 20:15:36,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:36,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:15:36,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:36,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:15:36,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:15:36,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:36,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 305 transitions, 3633 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 20:15:36,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:36,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:36,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:37,471 INFO L124 PetriNetUnfolderBase]: 3185/4795 cut-off events. [2024-06-03 20:15:37,471 INFO L125 PetriNetUnfolderBase]: For 329859/329859 co-relation queries the response was YES. [2024-06-03 20:15:37,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37444 conditions, 4795 events. 3185/4795 cut-off events. For 329859/329859 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24487 event pairs, 574 based on Foata normal form. 20/4815 useless extension candidates. Maximal degree in co-relation 37329. Up to 4274 conditions per place. [2024-06-03 20:15:37,518 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 295 selfloop transitions, 63 changer transitions 0/361 dead transitions. [2024-06-03 20:15:37,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 361 transitions, 4631 flow [2024-06-03 20:15:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:15:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:15:37,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-03 20:15:37,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-03 20:15:37,520 INFO L175 Difference]: Start difference. First operand has 237 places, 305 transitions, 3633 flow. Second operand 11 states and 188 transitions. [2024-06-03 20:15:37,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 361 transitions, 4631 flow [2024-06-03 20:15:38,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 361 transitions, 4491 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:38,170 INFO L231 Difference]: Finished difference. Result has 244 places, 309 transitions, 3685 flow [2024-06-03 20:15:38,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3493, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3685, PETRI_PLACES=244, PETRI_TRANSITIONS=309} [2024-06-03 20:15:38,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-03 20:15:38,171 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 309 transitions, 3685 flow [2024-06-03 20:15:38,171 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 20:15:38,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:38,171 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 20:15:38,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:15:38,171 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:38,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1068108827, now seen corresponding path program 6 times [2024-06-03 20:15:38,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:38,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8184629] [2024-06-03 20:15:38,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:38,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:39,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:39,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8184629] [2024-06-03 20:15:39,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8184629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:39,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:39,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:15:39,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328370624] [2024-06-03 20:15:39,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:39,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:15:39,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:39,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:15:39,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:15:39,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:39,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 309 transitions, 3685 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 20:15:39,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:39,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:39,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:40,913 INFO L124 PetriNetUnfolderBase]: 3244/4888 cut-off events. [2024-06-03 20:15:40,914 INFO L125 PetriNetUnfolderBase]: For 330726/330726 co-relation queries the response was YES. [2024-06-03 20:15:40,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38656 conditions, 4888 events. 3244/4888 cut-off events. For 330726/330726 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 25133 event pairs, 579 based on Foata normal form. 4/4892 useless extension candidates. Maximal degree in co-relation 38539. Up to 4427 conditions per place. [2024-06-03 20:15:40,973 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 291 selfloop transitions, 65 changer transitions 0/359 dead transitions. [2024-06-03 20:15:40,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 359 transitions, 4926 flow [2024-06-03 20:15:40,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-03 20:15:40,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-03 20:15:40,974 INFO L175 Difference]: Start difference. First operand has 244 places, 309 transitions, 3685 flow. Second operand 10 states and 172 transitions. [2024-06-03 20:15:40,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 359 transitions, 4926 flow [2024-06-03 20:15:41,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 359 transitions, 4785 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:41,555 INFO L231 Difference]: Finished difference. Result has 247 places, 314 transitions, 3831 flow [2024-06-03 20:15:41,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3831, PETRI_PLACES=247, PETRI_TRANSITIONS=314} [2024-06-03 20:15:41,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-03 20:15:41,556 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 314 transitions, 3831 flow [2024-06-03 20:15:41,556 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 20:15:41,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:41,556 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 20:15:41,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:15:41,556 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:41,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:41,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1062598577, now seen corresponding path program 7 times [2024-06-03 20:15:41,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:41,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452308784] [2024-06-03 20:15:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:41,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:42,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:42,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452308784] [2024-06-03 20:15:42,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452308784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:42,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:42,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:15:42,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706963102] [2024-06-03 20:15:42,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:42,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:15:42,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:42,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:15:42,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:15:42,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:42,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 314 transitions, 3831 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 20:15:42,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:42,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:42,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:44,003 INFO L124 PetriNetUnfolderBase]: 3236/4876 cut-off events. [2024-06-03 20:15:44,003 INFO L125 PetriNetUnfolderBase]: For 336989/336989 co-relation queries the response was YES. [2024-06-03 20:15:44,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38607 conditions, 4876 events. 3236/4876 cut-off events. For 336989/336989 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 25067 event pairs, 583 based on Foata normal form. 4/4880 useless extension candidates. Maximal degree in co-relation 38488. Up to 4480 conditions per place. [2024-06-03 20:15:44,051 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 293 selfloop transitions, 63 changer transitions 0/359 dead transitions. [2024-06-03 20:15:44,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 359 transitions, 4775 flow [2024-06-03 20:15:44,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-03 20:15:44,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 20:15:44,052 INFO L175 Difference]: Start difference. First operand has 247 places, 314 transitions, 3831 flow. Second operand 10 states and 170 transitions. [2024-06-03 20:15:44,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 359 transitions, 4775 flow [2024-06-03 20:15:44,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 359 transitions, 4538 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-03 20:15:44,615 INFO L231 Difference]: Finished difference. Result has 251 places, 318 transitions, 3848 flow [2024-06-03 20:15:44,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3848, PETRI_PLACES=251, PETRI_TRANSITIONS=318} [2024-06-03 20:15:44,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-03 20:15:44,616 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 318 transitions, 3848 flow [2024-06-03 20:15:44,616 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 20:15:44,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:44,616 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 20:15:44,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:15:44,616 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 20:15:44,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1062383375, now seen corresponding path program 3 times [2024-06-03 20:15:44,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:44,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7504823] [2024-06-03 20:15:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:44,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:45,768 INFO 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 20:15:45,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:45,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7504823] [2024-06-03 20:15:45,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7504823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:45,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:45,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:45,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090733843] [2024-06-03 20:15:45,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:45,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:45,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:45,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:45,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:45,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:45,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 318 transitions, 3848 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:45,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:45,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:45,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:47,080 INFO L124 PetriNetUnfolderBase]: 3405/5159 cut-off events. [2024-06-03 20:15:47,081 INFO L125 PetriNetUnfolderBase]: For 392622/392622 co-relation queries the response was YES. [2024-06-03 20:15:47,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41367 conditions, 5159 events. 3405/5159 cut-off events. For 392622/392622 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 26999 event pairs, 448 based on Foata normal form. 16/5175 useless extension candidates. Maximal degree in co-relation 41245. Up to 3475 conditions per place. [2024-06-03 20:15:47,139 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 140 changer transitions 0/365 dead transitions. [2024-06-03 20:15:47,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 365 transitions, 5020 flow [2024-06-03 20:15:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 20:15:47,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-03 20:15:47,140 INFO L175 Difference]: Start difference. First operand has 251 places, 318 transitions, 3848 flow. Second operand 9 states and 165 transitions. [2024-06-03 20:15:47,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 365 transitions, 5020 flow [2024-06-03 20:15:47,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 365 transitions, 4936 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:47,631 INFO L231 Difference]: Finished difference. Result has 255 places, 320 transitions, 4124 flow [2024-06-03 20:15:47,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3764, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4124, PETRI_PLACES=255, PETRI_TRANSITIONS=320} [2024-06-03 20:15:47,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-03 20:15:47,632 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 320 transitions, 4124 flow [2024-06-03 20:15:47,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:47,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:47,632 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 20:15:47,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:15:47,632 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:47,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1542633577, now seen corresponding path program 4 times [2024-06-03 20:15:47,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:47,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762975160] [2024-06-03 20:15:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:47,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:48,852 INFO 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 20:15:48,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:48,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762975160] [2024-06-03 20:15:48,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762975160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:48,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:48,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:48,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089792533] [2024-06-03 20:15:48,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:48,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:48,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:48,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:48,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:48,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:48,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 320 transitions, 4124 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:48,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:48,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:48,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:50,158 INFO L124 PetriNetUnfolderBase]: 3480/5284 cut-off events. [2024-06-03 20:15:50,158 INFO L125 PetriNetUnfolderBase]: For 416532/416532 co-relation queries the response was YES. [2024-06-03 20:15:50,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43059 conditions, 5284 events. 3480/5284 cut-off events. For 416532/416532 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27926 event pairs, 629 based on Foata normal form. 20/5304 useless extension candidates. Maximal degree in co-relation 42936. Up to 4142 conditions per place. [2024-06-03 20:15:50,213 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 135 changer transitions 0/360 dead transitions. [2024-06-03 20:15:50,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 360 transitions, 5018 flow [2024-06-03 20:15:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 20:15:50,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-03 20:15:50,214 INFO L175 Difference]: Start difference. First operand has 255 places, 320 transitions, 4124 flow. Second operand 9 states and 159 transitions. [2024-06-03 20:15:50,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 360 transitions, 5018 flow [2024-06-03 20:15:50,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 360 transitions, 4797 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:50,803 INFO L231 Difference]: Finished difference. Result has 259 places, 321 transitions, 4220 flow [2024-06-03 20:15:50,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4220, PETRI_PLACES=259, PETRI_TRANSITIONS=321} [2024-06-03 20:15:50,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-03 20:15:50,804 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 321 transitions, 4220 flow [2024-06-03 20:15:50,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:50,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:50,804 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 20:15:50,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:15:50,804 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:50,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:50,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1542431767, now seen corresponding path program 5 times [2024-06-03 20:15:50,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:50,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278246467] [2024-06-03 20:15:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:50,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:52,173 INFO 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 20:15:52,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:52,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278246467] [2024-06-03 20:15:52,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278246467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:52,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:52,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:15:52,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174071385] [2024-06-03 20:15:52,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:52,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:15:52,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:52,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:15:52,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:15:52,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:52,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 321 transitions, 4220 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 20:15:52,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:52,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:52,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:53,707 INFO L124 PetriNetUnfolderBase]: 3577/5437 cut-off events. [2024-06-03 20:15:53,708 INFO L125 PetriNetUnfolderBase]: For 426331/426331 co-relation queries the response was YES. [2024-06-03 20:15:53,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44138 conditions, 5437 events. 3577/5437 cut-off events. For 426331/426331 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29081 event pairs, 666 based on Foata normal form. 20/5457 useless extension candidates. Maximal degree in co-relation 44013. Up to 4916 conditions per place. [2024-06-03 20:15:53,758 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 307 selfloop transitions, 65 changer transitions 0/375 dead transitions. [2024-06-03 20:15:53,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 375 transitions, 5199 flow [2024-06-03 20:15:53,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:15:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:15:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-03 20:15:53,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-03 20:15:53,759 INFO L175 Difference]: Start difference. First operand has 259 places, 321 transitions, 4220 flow. Second operand 11 states and 188 transitions. [2024-06-03 20:15:53,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 375 transitions, 5199 flow [2024-06-03 20:15:54,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 375 transitions, 4910 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:15:54,438 INFO L231 Difference]: Finished difference. Result has 264 places, 325 transitions, 4134 flow [2024-06-03 20:15:54,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3937, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4134, PETRI_PLACES=264, PETRI_TRANSITIONS=325} [2024-06-03 20:15:54,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-03 20:15:54,439 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 325 transitions, 4134 flow [2024-06-03 20:15:54,439 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 20:15:54,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:54,439 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 20:15:54,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:15:54,440 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:54,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:54,440 INFO L85 PathProgramCache]: Analyzing trace with hash -720921137, now seen corresponding path program 8 times [2024-06-03 20:15:54,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:54,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657735080] [2024-06-03 20:15:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:54,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:55,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:55,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657735080] [2024-06-03 20:15:55,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657735080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:55,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:55,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:55,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857633449] [2024-06-03 20:15:55,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:55,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:55,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:55,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:55,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:55,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:55,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 325 transitions, 4134 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 20:15:55,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:55,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:55,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:57,245 INFO L124 PetriNetUnfolderBase]: 3834/5852 cut-off events. [2024-06-03 20:15:57,246 INFO L125 PetriNetUnfolderBase]: For 467839/467841 co-relation queries the response was YES. [2024-06-03 20:15:57,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46318 conditions, 5852 events. 3834/5852 cut-off events. For 467839/467841 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 31987 event pairs, 788 based on Foata normal form. 38/5890 useless extension candidates. Maximal degree in co-relation 46191. Up to 5297 conditions per place. [2024-06-03 20:15:57,311 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 332 selfloop transitions, 51 changer transitions 0/386 dead transitions. [2024-06-03 20:15:57,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 386 transitions, 5368 flow [2024-06-03 20:15:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:57,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-03 20:15:57,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 20:15:57,314 INFO L175 Difference]: Start difference. First operand has 264 places, 325 transitions, 4134 flow. Second operand 10 states and 170 transitions. [2024-06-03 20:15:57,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 386 transitions, 5368 flow [2024-06-03 20:15:57,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 386 transitions, 5215 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:58,001 INFO L231 Difference]: Finished difference. Result has 268 places, 340 transitions, 4403 flow [2024-06-03 20:15:58,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3993, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4403, PETRI_PLACES=268, PETRI_TRANSITIONS=340} [2024-06-03 20:15:58,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-03 20:15:58,002 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 340 transitions, 4403 flow [2024-06-03 20:15:58,002 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 20:15:58,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:58,002 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 20:15:58,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:15:58,002 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:58,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:58,003 INFO L85 PathProgramCache]: Analyzing trace with hash -48564653, now seen corresponding path program 9 times [2024-06-03 20:15:58,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:58,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772656414] [2024-06-03 20:15:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:58,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:59,262 INFO 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 20:15:59,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:59,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772656414] [2024-06-03 20:15:59,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772656414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:59,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:59,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:59,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392846285] [2024-06-03 20:15:59,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:59,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:59,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:59,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:59,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:59,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:15:59,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 340 transitions, 4403 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 20:15:59,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:59,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:15:59,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:00,705 INFO L124 PetriNetUnfolderBase]: 3931/6009 cut-off events. [2024-06-03 20:16:00,705 INFO L125 PetriNetUnfolderBase]: For 456830/456832 co-relation queries the response was YES. [2024-06-03 20:16:00,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47617 conditions, 6009 events. 3931/6009 cut-off events. For 456830/456832 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 33125 event pairs, 784 based on Foata normal form. 18/6027 useless extension candidates. Maximal degree in co-relation 47487. Up to 5317 conditions per place. [2024-06-03 20:16:00,774 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 338 selfloop transitions, 55 changer transitions 0/396 dead transitions. [2024-06-03 20:16:00,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 396 transitions, 5556 flow [2024-06-03 20:16:00,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-03 20:16:00,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-03 20:16:00,776 INFO L175 Difference]: Start difference. First operand has 268 places, 340 transitions, 4403 flow. Second operand 10 states and 173 transitions. [2024-06-03 20:16:00,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 396 transitions, 5556 flow [2024-06-03 20:16:01,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 396 transitions, 5454 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:16:01,463 INFO L231 Difference]: Finished difference. Result has 273 places, 346 transitions, 4551 flow [2024-06-03 20:16:01,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4551, PETRI_PLACES=273, PETRI_TRANSITIONS=346} [2024-06-03 20:16:01,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-03 20:16:01,463 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 346 transitions, 4551 flow [2024-06-03 20:16:01,463 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 20:16:01,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:01,464 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 20:16:01,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:16:01,464 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:01,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:01,464 INFO L85 PathProgramCache]: Analyzing trace with hash 936567759, now seen corresponding path program 10 times [2024-06-03 20:16:01,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:01,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830646177] [2024-06-03 20:16:01,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:01,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:02,636 INFO 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 20:16:02,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:02,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830646177] [2024-06-03 20:16:02,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830646177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:02,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:02,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:16:02,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553612072] [2024-06-03 20:16:02,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:02,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:16:02,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:02,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:16:02,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:16:02,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:16:02,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 346 transitions, 4551 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:02,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:02,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:16:02,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:04,098 INFO L124 PetriNetUnfolderBase]: 4090/6272 cut-off events. [2024-06-03 20:16:04,098 INFO L125 PetriNetUnfolderBase]: For 475666/475668 co-relation queries the response was YES. [2024-06-03 20:16:04,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49416 conditions, 6272 events. 4090/6272 cut-off events. For 475666/475668 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 35137 event pairs, 803 based on Foata normal form. 18/6290 useless extension candidates. Maximal degree in co-relation 49284. Up to 5819 conditions per place. [2024-06-03 20:16:04,169 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 53 changer transitions 0/408 dead transitions. [2024-06-03 20:16:04,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 408 transitions, 5831 flow [2024-06-03 20:16:04,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-03 20:16:04,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-03 20:16:04,171 INFO L175 Difference]: Start difference. First operand has 273 places, 346 transitions, 4551 flow. Second operand 10 states and 164 transitions. [2024-06-03 20:16:04,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 408 transitions, 5831 flow [2024-06-03 20:16:04,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 408 transitions, 5738 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:16:04,812 INFO L231 Difference]: Finished difference. Result has 279 places, 364 transitions, 4905 flow [2024-06-03 20:16:04,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4905, PETRI_PLACES=279, PETRI_TRANSITIONS=364} [2024-06-03 20:16:04,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-03 20:16:04,812 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 364 transitions, 4905 flow [2024-06-03 20:16:04,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:04,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:04,813 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 20:16:04,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:16:04,813 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:04,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:04,813 INFO L85 PathProgramCache]: Analyzing trace with hash 558364913, now seen corresponding path program 11 times [2024-06-03 20:16:04,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:04,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559676412] [2024-06-03 20:16:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:04,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:06,341 INFO 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 20:16:06,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:06,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559676412] [2024-06-03 20:16:06,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559676412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:06,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:06,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:16:06,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587307058] [2024-06-03 20:16:06,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:06,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:16:06,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:06,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:16:06,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:16:06,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:16:06,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 364 transitions, 4905 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 20:16:06,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:06,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:16:06,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:07,963 INFO L124 PetriNetUnfolderBase]: 4107/6297 cut-off events. [2024-06-03 20:16:07,963 INFO L125 PetriNetUnfolderBase]: For 472578/472580 co-relation queries the response was YES. [2024-06-03 20:16:08,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50453 conditions, 6297 events. 4107/6297 cut-off events. For 472578/472580 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35269 event pairs, 817 based on Foata normal form. 6/6303 useless extension candidates. Maximal degree in co-relation 50317. Up to 5763 conditions per place. [2024-06-03 20:16:08,026 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 333 selfloop transitions, 67 changer transitions 0/403 dead transitions. [2024-06-03 20:16:08,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 403 transitions, 6004 flow [2024-06-03 20:16:08,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:08,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:16:08,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-03 20:16:08,027 INFO L175 Difference]: Start difference. First operand has 279 places, 364 transitions, 4905 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:16:08,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 403 transitions, 6004 flow [2024-06-03 20:16:08,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 403 transitions, 5792 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-03 20:16:08,937 INFO L231 Difference]: Finished difference. Result has 283 places, 369 transitions, 5055 flow [2024-06-03 20:16:08,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5055, PETRI_PLACES=283, PETRI_TRANSITIONS=369} [2024-06-03 20:16:08,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-03 20:16:08,938 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 369 transitions, 5055 flow [2024-06-03 20:16:08,938 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 20:16:08,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:08,938 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 20:16:08,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:16:08,938 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:08,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:08,939 INFO L85 PathProgramCache]: Analyzing trace with hash 560242583, now seen corresponding path program 12 times [2024-06-03 20:16:08,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:08,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960979598] [2024-06-03 20:16:08,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:08,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:10,343 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 20:16:10,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:10,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960979598] [2024-06-03 20:16:10,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960979598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:10,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:10,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:16:10,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737467558] [2024-06-03 20:16:10,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:10,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:16:10,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:10,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:16:10,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:16:10,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:16:10,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 369 transitions, 5055 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 20:16:10,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:10,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:16:10,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:11,889 INFO L124 PetriNetUnfolderBase]: 4124/6336 cut-off events. [2024-06-03 20:16:11,889 INFO L125 PetriNetUnfolderBase]: For 488349/488351 co-relation queries the response was YES. [2024-06-03 20:16:11,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51331 conditions, 6336 events. 4124/6336 cut-off events. For 488349/488351 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35763 event pairs, 990 based on Foata normal form. 6/6342 useless extension candidates. Maximal degree in co-relation 51193. Up to 5938 conditions per place. [2024-06-03 20:16:11,968 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 57 changer transitions 0/406 dead transitions. [2024-06-03 20:16:11,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 406 transitions, 6092 flow [2024-06-03 20:16:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-03 20:16:11,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-03 20:16:11,969 INFO L175 Difference]: Start difference. First operand has 283 places, 369 transitions, 5055 flow. Second operand 9 states and 149 transitions. [2024-06-03 20:16:11,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 406 transitions, 6092 flow [2024-06-03 20:16:13,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 406 transitions, 5905 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-03 20:16:13,119 INFO L231 Difference]: Finished difference. Result has 287 places, 372 transitions, 5111 flow [2024-06-03 20:16:13,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4872, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5111, PETRI_PLACES=287, PETRI_TRANSITIONS=372} [2024-06-03 20:16:13,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-03 20:16:13,120 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 372 transitions, 5111 flow [2024-06-03 20:16:13,120 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 20:16:13,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:13,120 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 20:16:13,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:16:13,120 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:13,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:13,120 INFO L85 PathProgramCache]: Analyzing trace with hash 643355753, now seen corresponding path program 13 times [2024-06-03 20:16:13,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:13,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27252769] [2024-06-03 20:16:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:13,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:14,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:14,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27252769] [2024-06-03 20:16:14,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27252769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:14,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:14,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:16:14,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099526813] [2024-06-03 20:16:14,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:14,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:16:14,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:14,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:16:14,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:16:14,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:16:14,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 372 transitions, 5111 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 20:16:14,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:14,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:16:14,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:16,147 INFO L124 PetriNetUnfolderBase]: 4141/6361 cut-off events. [2024-06-03 20:16:16,147 INFO L125 PetriNetUnfolderBase]: For 470758/470760 co-relation queries the response was YES. [2024-06-03 20:16:16,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51179 conditions, 6361 events. 4141/6361 cut-off events. For 470758/470760 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35970 event pairs, 944 based on Foata normal form. 6/6367 useless extension candidates. Maximal degree in co-relation 51039. Up to 5819 conditions per place. [2024-06-03 20:16:16,216 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 67 changer transitions 0/411 dead transitions. [2024-06-03 20:16:16,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 411 transitions, 6208 flow [2024-06-03 20:16:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:16,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:16:16,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-03 20:16:16,218 INFO L175 Difference]: Start difference. First operand has 287 places, 372 transitions, 5111 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:16:16,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 411 transitions, 6208 flow [2024-06-03 20:16:16,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 411 transitions, 6016 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-03 20:16:16,989 INFO L231 Difference]: Finished difference. Result has 290 places, 377 transitions, 5256 flow [2024-06-03 20:16:16,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4919, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5256, PETRI_PLACES=290, PETRI_TRANSITIONS=377} [2024-06-03 20:16:16,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-03 20:16:16,990 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 377 transitions, 5256 flow [2024-06-03 20:16:16,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:16,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:16,990 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 20:16:16,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:16:16,990 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:16,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:16,990 INFO L85 PathProgramCache]: Analyzing trace with hash 872609243, now seen corresponding path program 6 times [2024-06-03 20:16:16,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:16,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018167790] [2024-06-03 20:16:16,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:16,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:18,355 INFO 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 20:16:18,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:18,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018167790] [2024-06-03 20:16:18,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018167790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:18,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:18,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:16:18,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826889135] [2024-06-03 20:16:18,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:18,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:16:18,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:16:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:16:18,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:16:18,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 377 transitions, 5256 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 20:16:18,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:18,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:16:18,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:19,927 INFO L124 PetriNetUnfolderBase]: 4216/6486 cut-off events. [2024-06-03 20:16:19,927 INFO L125 PetriNetUnfolderBase]: For 514262/514264 co-relation queries the response was YES. [2024-06-03 20:16:19,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52116 conditions, 6486 events. 4216/6486 cut-off events. For 514262/514264 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 36878 event pairs, 933 based on Foata normal form. 22/6508 useless extension candidates. Maximal degree in co-relation 51974. Up to 5644 conditions per place. [2024-06-03 20:16:20,015 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 351 selfloop transitions, 67 changer transitions 0/421 dead transitions. [2024-06-03 20:16:20,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 421 transitions, 6294 flow [2024-06-03 20:16:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-03 20:16:20,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-03 20:16:20,016 INFO L175 Difference]: Start difference. First operand has 290 places, 377 transitions, 5256 flow. Second operand 10 states and 167 transitions. [2024-06-03 20:16:20,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 421 transitions, 6294 flow [2024-06-03 20:16:21,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 421 transitions, 6086 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-03 20:16:21,165 INFO L231 Difference]: Finished difference. Result has 295 places, 378 transitions, 5234 flow [2024-06-03 20:16:21,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5048, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5234, PETRI_PLACES=295, PETRI_TRANSITIONS=378} [2024-06-03 20:16:21,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-03 20:16:21,166 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 378 transitions, 5234 flow [2024-06-03 20:16:21,166 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 20:16:21,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:21,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:21,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:16:21,167 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 20:16:21,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:21,167 INFO L85 PathProgramCache]: Analyzing trace with hash 133084089, now seen corresponding path program 14 times [2024-06-03 20:16:21,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:21,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036689252] [2024-06-03 20:16:21,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:21,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:22,578 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 20:16:22,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:22,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036689252] [2024-06-03 20:16:22,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036689252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:22,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:22,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:16:22,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077576489] [2024-06-03 20:16:22,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:22,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:16:22,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:16:22,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:16:22,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:16:22,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 378 transitions, 5234 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 20:16:22,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:22,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:16:22,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:24,280 INFO L124 PetriNetUnfolderBase]: 4233/6501 cut-off events. [2024-06-03 20:16:24,280 INFO L125 PetriNetUnfolderBase]: For 481783/481783 co-relation queries the response was YES. [2024-06-03 20:16:24,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52220 conditions, 6501 events. 4233/6501 cut-off events. For 481783/481783 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 36881 event pairs, 832 based on Foata normal form. 4/6505 useless extension candidates. Maximal degree in co-relation 52076. Up to 5889 conditions per place. [2024-06-03 20:16:24,359 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 87 changer transitions 0/414 dead transitions. [2024-06-03 20:16:24,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 414 transitions, 6262 flow [2024-06-03 20:16:24,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 20:16:24,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-03 20:16:24,361 INFO L175 Difference]: Start difference. First operand has 295 places, 378 transitions, 5234 flow. Second operand 9 states and 152 transitions. [2024-06-03 20:16:24,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 414 transitions, 6262 flow [2024-06-03 20:16:25,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 414 transitions, 6112 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 20:16:25,743 INFO L231 Difference]: Finished difference. Result has 296 places, 380 transitions, 5356 flow [2024-06-03 20:16:25,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5084, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5356, PETRI_PLACES=296, PETRI_TRANSITIONS=380} [2024-06-03 20:16:25,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-03 20:16:25,744 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 380 transitions, 5356 flow [2024-06-03 20:16:25,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:25,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:25,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:25,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:16:25,744 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 20:16:25,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:25,744 INFO L85 PathProgramCache]: Analyzing trace with hash 133080369, now seen corresponding path program 15 times [2024-06-03 20:16:25,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:25,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869288033] [2024-06-03 20:16:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:25,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:27,331 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 20:16:27,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:27,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869288033] [2024-06-03 20:16:27,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869288033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:27,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:27,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:16:27,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951695226] [2024-06-03 20:16:27,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:27,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:16:27,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:27,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:16:27,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:16:27,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:16:27,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 380 transitions, 5356 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 20:16:27,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:27,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:16:27,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:29,016 INFO L124 PetriNetUnfolderBase]: 4275/6567 cut-off events. [2024-06-03 20:16:29,016 INFO L125 PetriNetUnfolderBase]: For 509272/509272 co-relation queries the response was YES. [2024-06-03 20:16:29,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53528 conditions, 6567 events. 4275/6567 cut-off events. For 509272/509272 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 37357 event pairs, 832 based on Foata normal form. 4/6571 useless extension candidates. Maximal degree in co-relation 53383. Up to 5831 conditions per place. [2024-06-03 20:16:29,104 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 322 selfloop transitions, 96 changer transitions 0/421 dead transitions. [2024-06-03 20:16:29,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 421 transitions, 6738 flow [2024-06-03 20:16:29,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 20:16:29,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-03 20:16:29,105 INFO L175 Difference]: Start difference. First operand has 296 places, 380 transitions, 5356 flow. Second operand 9 states and 154 transitions. [2024-06-03 20:16:29,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 421 transitions, 6738 flow [2024-06-03 20:16:30,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 421 transitions, 6498 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-03 20:16:30,156 INFO L231 Difference]: Finished difference. Result has 299 places, 385 transitions, 5523 flow [2024-06-03 20:16:30,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5116, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5523, PETRI_PLACES=299, PETRI_TRANSITIONS=385} [2024-06-03 20:16:30,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-03 20:16:30,157 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 385 transitions, 5523 flow [2024-06-03 20:16:30,157 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 20:16:30,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:30,158 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 20:16:30,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:16:30,158 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 20:16:30,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:30,158 INFO L85 PathProgramCache]: Analyzing trace with hash 133234191, now seen corresponding path program 7 times [2024-06-03 20:16:30,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:30,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417691736] [2024-06-03 20:16:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:30,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:31,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:31,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417691736] [2024-06-03 20:16:31,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417691736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:31,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:31,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:16:31,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377793506] [2024-06-03 20:16:31,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:31,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:16:31,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:31,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:16:31,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:16:31,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:16:31,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 385 transitions, 5523 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 20:16:31,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:31,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:16:31,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:33,535 INFO L124 PetriNetUnfolderBase]: 4350/6692 cut-off events. [2024-06-03 20:16:33,535 INFO L125 PetriNetUnfolderBase]: For 555816/555816 co-relation queries the response was YES. [2024-06-03 20:16:33,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54633 conditions, 6692 events. 4350/6692 cut-off events. For 555816/555816 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 38225 event pairs, 844 based on Foata normal form. 20/6712 useless extension candidates. Maximal degree in co-relation 54486. Up to 5784 conditions per place. [2024-06-03 20:16:33,609 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 334 selfloop transitions, 97 changer transitions 0/434 dead transitions. [2024-06-03 20:16:33,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 434 transitions, 6607 flow [2024-06-03 20:16:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:16:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:16:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-03 20:16:33,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-03 20:16:33,610 INFO L175 Difference]: Start difference. First operand has 299 places, 385 transitions, 5523 flow. Second operand 11 states and 185 transitions. [2024-06-03 20:16:33,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 434 transitions, 6607 flow [2024-06-03 20:16:34,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 434 transitions, 6384 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-03 20:16:34,672 INFO L231 Difference]: Finished difference. Result has 304 places, 386 transitions, 5542 flow [2024-06-03 20:16:34,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5300, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5542, PETRI_PLACES=304, PETRI_TRANSITIONS=386} [2024-06-03 20:16:34,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-03 20:16:34,672 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 386 transitions, 5542 flow [2024-06-03 20:16:34,672 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 20:16:34,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:34,672 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 20:16:34,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:16:34,673 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 20:16:34,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:34,673 INFO L85 PathProgramCache]: Analyzing trace with hash 157024645, now seen corresponding path program 16 times [2024-06-03 20:16:34,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:34,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914296852] [2024-06-03 20:16:34,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:34,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:35,984 INFO 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 20:16:35,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:35,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914296852] [2024-06-03 20:16:35,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914296852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:35,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:35,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:16:35,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211744394] [2024-06-03 20:16:35,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:35,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:16:35,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:35,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:16:35,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:16:36,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:16:36,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 386 transitions, 5542 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 20:16:36,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:36,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:16:36,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:37,694 INFO L124 PetriNetUnfolderBase]: 4342/6680 cut-off events. [2024-06-03 20:16:37,694 INFO L125 PetriNetUnfolderBase]: For 513155/513155 co-relation queries the response was YES. [2024-06-03 20:16:37,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54194 conditions, 6680 events. 4342/6680 cut-off events. For 513155/513155 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 38286 event pairs, 856 based on Foata normal form. 4/6684 useless extension candidates. Maximal degree in co-relation 54046. Up to 6068 conditions per place. [2024-06-03 20:16:37,779 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 328 selfloop transitions, 91 changer transitions 0/422 dead transitions. [2024-06-03 20:16:37,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 422 transitions, 6537 flow [2024-06-03 20:16:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:37,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 20:16:37,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-03 20:16:37,780 INFO L175 Difference]: Start difference. First operand has 304 places, 386 transitions, 5542 flow. Second operand 9 states and 152 transitions. [2024-06-03 20:16:37,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 422 transitions, 6537 flow [2024-06-03 20:16:39,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 422 transitions, 6265 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-03 20:16:39,063 INFO L231 Difference]: Finished difference. Result has 304 places, 387 transitions, 5495 flow [2024-06-03 20:16:39,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5290, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5495, PETRI_PLACES=304, PETRI_TRANSITIONS=387} [2024-06-03 20:16:39,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-03 20:16:39,063 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 387 transitions, 5495 flow [2024-06-03 20:16:39,063 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 20:16:39,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:39,063 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 20:16:39,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:16:39,064 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 20:16:39,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:39,064 INFO L85 PathProgramCache]: Analyzing trace with hash 157030597, now seen corresponding path program 8 times [2024-06-03 20:16:39,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:39,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132662874] [2024-06-03 20:16:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:39,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:40,345 INFO 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 20:16:40,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:40,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132662874] [2024-06-03 20:16:40,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132662874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:40,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:40,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:16:40,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238096711] [2024-06-03 20:16:40,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:40,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:16:40,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:40,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:16:40,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:16:40,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:16:40,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 387 transitions, 5495 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 20:16:40,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:40,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:16:40,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:42,194 INFO L124 PetriNetUnfolderBase]: 4417/6805 cut-off events. [2024-06-03 20:16:42,194 INFO L125 PetriNetUnfolderBase]: For 555756/555756 co-relation queries the response was YES. [2024-06-03 20:16:42,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54794 conditions, 6805 events. 4417/6805 cut-off events. For 555756/555756 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39196 event pairs, 856 based on Foata normal form. 20/6825 useless extension candidates. Maximal degree in co-relation 54645. Up to 5943 conditions per place. [2024-06-03 20:16:42,286 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 334 selfloop transitions, 95 changer transitions 0/432 dead transitions. [2024-06-03 20:16:42,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 432 transitions, 6563 flow [2024-06-03 20:16:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-03 20:16:42,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 20:16:42,287 INFO L175 Difference]: Start difference. First operand has 304 places, 387 transitions, 5495 flow. Second operand 10 states and 170 transitions. [2024-06-03 20:16:42,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 432 transitions, 6563 flow [2024-06-03 20:16:43,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 432 transitions, 6379 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:16:43,395 INFO L231 Difference]: Finished difference. Result has 307 places, 388 transitions, 5551 flow [2024-06-03 20:16:43,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5311, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5551, PETRI_PLACES=307, PETRI_TRANSITIONS=388} [2024-06-03 20:16:43,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-03 20:16:43,396 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 388 transitions, 5551 flow [2024-06-03 20:16:43,396 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 20:16:43,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:43,396 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 20:16:43,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:16:43,396 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:43,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:43,397 INFO L85 PathProgramCache]: Analyzing trace with hash -571980307, now seen corresponding path program 17 times [2024-06-03 20:16:43,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:43,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438208595] [2024-06-03 20:16:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:43,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:44,805 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 20:16:44,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:44,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438208595] [2024-06-03 20:16:44,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438208595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:44,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:44,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:44,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139757391] [2024-06-03 20:16:44,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:44,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:44,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:44,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:44,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:44,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:16:44,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 388 transitions, 5551 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 20:16:44,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:44,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:16:44,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:46,505 INFO L124 PetriNetUnfolderBase]: 4434/6836 cut-off events. [2024-06-03 20:16:46,506 INFO L125 PetriNetUnfolderBase]: For 544671/544673 co-relation queries the response was YES. [2024-06-03 20:16:46,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55464 conditions, 6836 events. 4434/6836 cut-off events. For 544671/544673 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 39459 event pairs, 849 based on Foata normal form. 6/6842 useless extension candidates. Maximal degree in co-relation 55314. Up to 5697 conditions per place. [2024-06-03 20:16:46,598 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 289 selfloop transitions, 133 changer transitions 0/425 dead transitions. [2024-06-03 20:16:46,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 425 transitions, 6609 flow [2024-06-03 20:16:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:16:46,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-03 20:16:46,599 INFO L175 Difference]: Start difference. First operand has 307 places, 388 transitions, 5551 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:16:46,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 425 transitions, 6609 flow [2024-06-03 20:16:47,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 425 transitions, 6395 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 20:16:47,782 INFO L231 Difference]: Finished difference. Result has 308 places, 390 transitions, 5702 flow [2024-06-03 20:16:47,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5337, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5702, PETRI_PLACES=308, PETRI_TRANSITIONS=390} [2024-06-03 20:16:47,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-03 20:16:47,782 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 390 transitions, 5702 flow [2024-06-03 20:16:47,783 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 20:16:47,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:47,783 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 20:16:47,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:16:47,783 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:47,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:47,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2065422669, now seen corresponding path program 9 times [2024-06-03 20:16:47,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:47,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565930538] [2024-06-03 20:16:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:47,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:49,331 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 20:16:49,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:49,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565930538] [2024-06-03 20:16:49,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565930538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:49,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:49,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:49,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619210628] [2024-06-03 20:16:49,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:49,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:49,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:49,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:49,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:49,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:16:49,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 390 transitions, 5702 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 20:16:49,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:49,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:16:49,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:51,092 INFO L124 PetriNetUnfolderBase]: 4509/6961 cut-off events. [2024-06-03 20:16:51,092 INFO L125 PetriNetUnfolderBase]: For 578711/578713 co-relation queries the response was YES. [2024-06-03 20:16:51,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56303 conditions, 6961 events. 4509/6961 cut-off events. For 578711/578713 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 40438 event pairs, 859 based on Foata normal form. 22/6983 useless extension candidates. Maximal degree in co-relation 56152. Up to 5702 conditions per place. [2024-06-03 20:16:51,178 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 298 selfloop transitions, 134 changer transitions 0/435 dead transitions. [2024-06-03 20:16:51,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 435 transitions, 6776 flow [2024-06-03 20:16:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-03 20:16:51,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-03 20:16:51,179 INFO L175 Difference]: Start difference. First operand has 308 places, 390 transitions, 5702 flow. Second operand 10 states and 177 transitions. [2024-06-03 20:16:51,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 435 transitions, 6776 flow [2024-06-03 20:16:52,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 435 transitions, 6429 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-03 20:16:52,561 INFO L231 Difference]: Finished difference. Result has 311 places, 391 transitions, 5673 flow [2024-06-03 20:16:52,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5673, PETRI_PLACES=311, PETRI_TRANSITIONS=391} [2024-06-03 20:16:52,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-03 20:16:52,562 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 391 transitions, 5673 flow [2024-06-03 20:16:52,562 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 20:16:52,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:52,562 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 20:16:52,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:16:52,562 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:52,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:52,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2070935151, now seen corresponding path program 18 times [2024-06-03 20:16:52,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:52,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068800583] [2024-06-03 20:16:52,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:52,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:54,088 INFO 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 20:16:54,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:54,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068800583] [2024-06-03 20:16:54,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068800583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:54,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:54,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:54,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010186728] [2024-06-03 20:16:54,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:54,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:54,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:54,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:54,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:54,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:16:54,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 391 transitions, 5673 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 20:16:54,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:54,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:16:54,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:55,783 INFO L124 PetriNetUnfolderBase]: 4526/6988 cut-off events. [2024-06-03 20:16:55,783 INFO L125 PetriNetUnfolderBase]: For 563989/563991 co-relation queries the response was YES. [2024-06-03 20:16:55,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56700 conditions, 6988 events. 4526/6988 cut-off events. For 563989/563991 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 40648 event pairs, 869 based on Foata normal form. 6/6994 useless extension candidates. Maximal degree in co-relation 56548. Up to 5849 conditions per place. [2024-06-03 20:16:55,876 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 288 selfloop transitions, 135 changer transitions 0/426 dead transitions. [2024-06-03 20:16:55,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 426 transitions, 6731 flow [2024-06-03 20:16:55,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:55,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 20:16:55,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-03 20:16:55,878 INFO L175 Difference]: Start difference. First operand has 311 places, 391 transitions, 5673 flow. Second operand 9 states and 156 transitions. [2024-06-03 20:16:55,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 426 transitions, 6731 flow [2024-06-03 20:16:57,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 426 transitions, 6443 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 20:16:57,055 INFO L231 Difference]: Finished difference. Result has 312 places, 393 transitions, 5758 flow [2024-06-03 20:16:57,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5385, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5758, PETRI_PLACES=312, PETRI_TRANSITIONS=393} [2024-06-03 20:16:57,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-03 20:16:57,055 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 393 transitions, 5758 flow [2024-06-03 20:16:57,055 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 20:16:57,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:57,055 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 20:16:57,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:16:57,056 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:57,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:57,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2070785049, now seen corresponding path program 10 times [2024-06-03 20:16:57,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:57,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776219430] [2024-06-03 20:16:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:57,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:58,491 INFO 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 20:16:58,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:58,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776219430] [2024-06-03 20:16:58,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776219430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:58,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:58,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:58,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284412451] [2024-06-03 20:16:58,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:58,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:58,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:58,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:58,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:58,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:16:58,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 393 transitions, 5758 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 20:16:58,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:58,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:16:58,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:00,295 INFO L124 PetriNetUnfolderBase]: 4601/7113 cut-off events. [2024-06-03 20:17:00,295 INFO L125 PetriNetUnfolderBase]: For 614841/614843 co-relation queries the response was YES. [2024-06-03 20:17:00,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57625 conditions, 7113 events. 4601/7113 cut-off events. For 614841/614843 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41603 event pairs, 883 based on Foata normal form. 22/7135 useless extension candidates. Maximal degree in co-relation 57472. Up to 6236 conditions per place. [2024-06-03 20:17:00,388 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 333 selfloop transitions, 100 changer transitions 0/436 dead transitions. [2024-06-03 20:17:00,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 436 transitions, 6830 flow [2024-06-03 20:17:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:17:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:17:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-03 20:17:00,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-03 20:17:00,389 INFO L175 Difference]: Start difference. First operand has 312 places, 393 transitions, 5758 flow. Second operand 10 states and 171 transitions. [2024-06-03 20:17:00,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 436 transitions, 6830 flow [2024-06-03 20:17:01,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 436 transitions, 6475 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-03 20:17:01,758 INFO L231 Difference]: Finished difference. Result has 315 places, 394 transitions, 5652 flow [2024-06-03 20:17:01,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5403, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5652, PETRI_PLACES=315, PETRI_TRANSITIONS=394} [2024-06-03 20:17:01,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-03 20:17:01,759 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 394 transitions, 5652 flow [2024-06-03 20:17:01,759 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 20:17:01,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:01,759 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 20:17:01,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:17:01,759 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:01,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2070938871, now seen corresponding path program 19 times [2024-06-03 20:17:01,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:01,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995522584] [2024-06-03 20:17:01,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:01,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:03,170 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 20:17:03,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:03,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995522584] [2024-06-03 20:17:03,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995522584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:03,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:03,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:17:03,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141079414] [2024-06-03 20:17:03,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:03,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:17:03,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:03,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:17:03,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:17:03,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:17:03,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 394 transitions, 5652 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 20:17:03,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:03,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:17:03,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:05,011 INFO L124 PetriNetUnfolderBase]: 4729/7321 cut-off events. [2024-06-03 20:17:05,012 INFO L125 PetriNetUnfolderBase]: For 648980/648982 co-relation queries the response was YES. [2024-06-03 20:17:05,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60496 conditions, 7321 events. 4729/7321 cut-off events. For 648980/648982 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 43187 event pairs, 914 based on Foata normal form. 6/7327 useless extension candidates. Maximal degree in co-relation 60342. Up to 5933 conditions per place. [2024-06-03 20:17:05,110 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 294 selfloop transitions, 141 changer transitions 0/438 dead transitions. [2024-06-03 20:17:05,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 438 transitions, 7132 flow [2024-06-03 20:17:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:17:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:17:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 20:17:05,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:17:05,111 INFO L175 Difference]: Start difference. First operand has 315 places, 394 transitions, 5652 flow. Second operand 9 states and 162 transitions. [2024-06-03 20:17:05,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 438 transitions, 7132 flow [2024-06-03 20:17:06,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 438 transitions, 6907 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 20:17:06,793 INFO L231 Difference]: Finished difference. Result has 317 places, 399 transitions, 5931 flow [2024-06-03 20:17:06,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5427, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5931, PETRI_PLACES=317, PETRI_TRANSITIONS=399} [2024-06-03 20:17:06,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-03 20:17:06,793 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 399 transitions, 5931 flow [2024-06-03 20:17:06,794 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 20:17:06,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:06,794 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 20:17:06,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:17:06,794 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:06,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:06,794 INFO L85 PathProgramCache]: Analyzing trace with hash 67891447, now seen corresponding path program 11 times [2024-06-03 20:17:06,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:06,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222127756] [2024-06-03 20:17:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:06,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:08,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:08,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222127756] [2024-06-03 20:17:08,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222127756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:08,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:08,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:17:08,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468046034] [2024-06-03 20:17:08,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:08,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:17:08,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:08,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:17:08,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:17:08,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:17:08,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 399 transitions, 5931 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:08,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:08,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:17:08,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:09,849 INFO L124 PetriNetUnfolderBase]: 4787/7419 cut-off events. [2024-06-03 20:17:09,849 INFO L125 PetriNetUnfolderBase]: For 697578/697580 co-relation queries the response was YES. [2024-06-03 20:17:09,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61724 conditions, 7419 events. 4787/7419 cut-off events. For 697578/697580 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 43938 event pairs, 881 based on Foata normal form. 18/7437 useless extension candidates. Maximal degree in co-relation 61568. Up to 5970 conditions per place. [2024-06-03 20:17:09,950 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 301 selfloop transitions, 142 changer transitions 0/446 dead transitions. [2024-06-03 20:17:09,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 446 transitions, 7382 flow [2024-06-03 20:17:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:17:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:17:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 20:17:09,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-03 20:17:09,951 INFO L175 Difference]: Start difference. First operand has 317 places, 399 transitions, 5931 flow. Second operand 9 states and 166 transitions. [2024-06-03 20:17:09,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 446 transitions, 7382 flow [2024-06-03 20:17:11,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 446 transitions, 7090 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-03 20:17:11,709 INFO L231 Difference]: Finished difference. Result has 322 places, 401 transitions, 6058 flow [2024-06-03 20:17:11,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5659, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6058, PETRI_PLACES=322, PETRI_TRANSITIONS=401} [2024-06-03 20:17:11,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-03 20:17:11,709 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 401 transitions, 6058 flow [2024-06-03 20:17:11,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:11,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:11,709 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 20:17:11,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:17:11,709 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:11,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:11,710 INFO L85 PathProgramCache]: Analyzing trace with hash 67884007, now seen corresponding path program 12 times [2024-06-03 20:17:11,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:11,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281240843] [2024-06-03 20:17:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:11,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:13,006 INFO 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 20:17:13,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:13,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281240843] [2024-06-03 20:17:13,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281240843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:13,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:13,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:17:13,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867453722] [2024-06-03 20:17:13,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:13,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:17:13,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:13,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:17:13,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:17:13,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:17:13,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 401 transitions, 6058 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 20:17:13,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:13,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:17:13,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:15,107 INFO L124 PetriNetUnfolderBase]: 4751/7363 cut-off events. [2024-06-03 20:17:15,108 INFO L125 PetriNetUnfolderBase]: For 670412/670414 co-relation queries the response was YES. [2024-06-03 20:17:15,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60319 conditions, 7363 events. 4751/7363 cut-off events. For 670412/670414 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 43570 event pairs, 868 based on Foata normal form. 22/7385 useless extension candidates. Maximal degree in co-relation 60160. Up to 6122 conditions per place. [2024-06-03 20:17:15,200 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 290 selfloop transitions, 153 changer transitions 0/446 dead transitions. [2024-06-03 20:17:15,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 446 transitions, 7160 flow [2024-06-03 20:17:15,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:17:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:17:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-03 20:17:15,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-03 20:17:15,201 INFO L175 Difference]: Start difference. First operand has 322 places, 401 transitions, 6058 flow. Second operand 10 states and 174 transitions. [2024-06-03 20:17:15,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 446 transitions, 7160 flow [2024-06-03 20:17:16,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 446 transitions, 6833 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 20:17:16,834 INFO L231 Difference]: Finished difference. Result has 326 places, 402 transitions, 6088 flow [2024-06-03 20:17:16,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5732, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6088, PETRI_PLACES=326, PETRI_TRANSITIONS=402} [2024-06-03 20:17:16,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-03 20:17:16,835 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 402 transitions, 6088 flow [2024-06-03 20:17:16,835 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 20:17:16,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:16,835 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 20:17:16,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:17:16,835 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:16,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:16,836 INFO L85 PathProgramCache]: Analyzing trace with hash 381850147, now seen corresponding path program 13 times [2024-06-03 20:17:16,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:16,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523397751] [2024-06-03 20:17:16,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:16,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:18,183 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 20:17:18,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:18,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523397751] [2024-06-03 20:17:18,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523397751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:18,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:18,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:17:18,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916225845] [2024-06-03 20:17:18,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:18,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:17:18,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:18,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:17:18,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:17:18,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:17:18,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 402 transitions, 6088 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 20:17:18,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:18,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:17:18,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:20,140 INFO L124 PetriNetUnfolderBase]: 4759/7383 cut-off events. [2024-06-03 20:17:20,140 INFO L125 PetriNetUnfolderBase]: For 657401/657403 co-relation queries the response was YES. [2024-06-03 20:17:20,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59886 conditions, 7383 events. 4759/7383 cut-off events. For 657401/657403 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 43474 event pairs, 697 based on Foata normal form. 18/7401 useless extension candidates. Maximal degree in co-relation 59726. Up to 4266 conditions per place. [2024-06-03 20:17:20,249 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 279 selfloop transitions, 172 changer transitions 0/454 dead transitions. [2024-06-03 20:17:20,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 454 transitions, 7528 flow [2024-06-03 20:17:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:17:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:17:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-03 20:17:20,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:17:20,250 INFO L175 Difference]: Start difference. First operand has 326 places, 402 transitions, 6088 flow. Second operand 10 states and 180 transitions. [2024-06-03 20:17:20,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 454 transitions, 7528 flow [2024-06-03 20:17:21,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 454 transitions, 7161 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-03 20:17:21,896 INFO L231 Difference]: Finished difference. Result has 328 places, 403 transitions, 6133 flow [2024-06-03 20:17:21,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5721, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6133, PETRI_PLACES=328, PETRI_TRANSITIONS=403} [2024-06-03 20:17:21,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-03 20:17:21,897 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 403 transitions, 6133 flow [2024-06-03 20:17:21,897 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 20:17:21,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:21,897 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 20:17:21,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:17:21,897 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:21,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:21,897 INFO L85 PathProgramCache]: Analyzing trace with hash -187634973, now seen corresponding path program 20 times [2024-06-03 20:17:21,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:21,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802183752] [2024-06-03 20:17:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:21,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:23,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:23,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802183752] [2024-06-03 20:17:23,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802183752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:23,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:23,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:17:23,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083510393] [2024-06-03 20:17:23,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:23,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:17:23,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:23,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:17:23,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:17:23,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:17:23,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 403 transitions, 6133 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 20:17:23,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:23,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:17:23,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:25,217 INFO L124 PetriNetUnfolderBase]: 4751/7371 cut-off events. [2024-06-03 20:17:25,217 INFO L125 PetriNetUnfolderBase]: For 633774/633776 co-relation queries the response was YES. [2024-06-03 20:17:25,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59630 conditions, 7371 events. 4751/7371 cut-off events. For 633774/633776 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 43725 event pairs, 883 based on Foata normal form. 6/7377 useless extension candidates. Maximal degree in co-relation 59471. Up to 6112 conditions per place. [2024-06-03 20:17:25,321 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 296 selfloop transitions, 142 changer transitions 0/441 dead transitions. [2024-06-03 20:17:25,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 441 transitions, 7161 flow [2024-06-03 20:17:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:17:25,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:17:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 20:17:25,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-03 20:17:25,323 INFO L175 Difference]: Start difference. First operand has 328 places, 403 transitions, 6133 flow. Second operand 9 states and 160 transitions. [2024-06-03 20:17:25,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 441 transitions, 7161 flow [2024-06-03 20:17:27,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 441 transitions, 6689 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-03 20:17:27,092 INFO L231 Difference]: Finished difference. Result has 329 places, 403 transitions, 5955 flow [2024-06-03 20:17:27,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5661, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5955, PETRI_PLACES=329, PETRI_TRANSITIONS=403} [2024-06-03 20:17:27,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-03 20:17:27,092 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 403 transitions, 5955 flow [2024-06-03 20:17:27,093 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 20:17:27,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:27,093 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 20:17:27,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:17:27,093 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:27,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:27,093 INFO L85 PathProgramCache]: Analyzing trace with hash -187629021, now seen corresponding path program 14 times [2024-06-03 20:17:27,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:27,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216778239] [2024-06-03 20:17:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:27,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:28,499 INFO 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 20:17:28,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:28,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216778239] [2024-06-03 20:17:28,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216778239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:28,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:28,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:17:28,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121035347] [2024-06-03 20:17:28,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:28,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:17:28,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:28,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:17:28,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:17:28,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:17:28,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 403 transitions, 5955 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 20:17:28,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:28,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:17:28,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:30,462 INFO L124 PetriNetUnfolderBase]: 4715/7315 cut-off events. [2024-06-03 20:17:30,462 INFO L125 PetriNetUnfolderBase]: For 628665/628667 co-relation queries the response was YES. [2024-06-03 20:17:30,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57009 conditions, 7315 events. 4715/7315 cut-off events. For 628665/628667 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 43284 event pairs, 865 based on Foata normal form. 22/7337 useless extension candidates. Maximal degree in co-relation 56849. Up to 5936 conditions per place. [2024-06-03 20:17:30,569 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 300 selfloop transitions, 143 changer transitions 0/446 dead transitions. [2024-06-03 20:17:30,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 446 transitions, 7011 flow [2024-06-03 20:17:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:17:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:17:30,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-03 20:17:30,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 20:17:30,571 INFO L175 Difference]: Start difference. First operand has 329 places, 403 transitions, 5955 flow. Second operand 10 states and 175 transitions. [2024-06-03 20:17:30,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 446 transitions, 7011 flow [2024-06-03 20:17:32,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 446 transitions, 6712 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:17:32,321 INFO L231 Difference]: Finished difference. Result has 331 places, 403 transitions, 5955 flow [2024-06-03 20:17:32,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5656, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5955, PETRI_PLACES=331, PETRI_TRANSITIONS=403} [2024-06-03 20:17:32,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-03 20:17:32,322 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 403 transitions, 5955 flow [2024-06-03 20:17:32,322 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 20:17:32,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:32,322 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 20:17:32,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:17:32,322 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:32,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:32,323 INFO L85 PathProgramCache]: Analyzing trace with hash 798194447, now seen corresponding path program 1 times [2024-06-03 20:17:32,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:32,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707232787] [2024-06-03 20:17:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:32,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:33,282 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 20:17:33,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:33,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707232787] [2024-06-03 20:17:33,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707232787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:33,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:33,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:33,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5328473] [2024-06-03 20:17:33,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:33,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:33,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:33,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:33,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:33,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:17:33,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 403 transitions, 5955 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 20:17:33,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:33,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:17:33,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:35,054 INFO L124 PetriNetUnfolderBase]: 4746/7369 cut-off events. [2024-06-03 20:17:35,055 INFO L125 PetriNetUnfolderBase]: For 595767/595767 co-relation queries the response was YES. [2024-06-03 20:17:35,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57418 conditions, 7369 events. 4746/7369 cut-off events. For 595767/595767 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 44096 event pairs, 1995 based on Foata normal form. 3/7372 useless extension candidates. Maximal degree in co-relation 57257. Up to 7202 conditions per place. [2024-06-03 20:17:35,160 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 393 selfloop transitions, 43 changer transitions 0/439 dead transitions. [2024-06-03 20:17:35,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 439 transitions, 7233 flow [2024-06-03 20:17:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:17:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:17:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:17:35,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-03 20:17:35,161 INFO L175 Difference]: Start difference. First operand has 331 places, 403 transitions, 5955 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:17:35,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 439 transitions, 7233 flow [2024-06-03 20:17:37,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 439 transitions, 6922 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-03 20:17:37,223 INFO L231 Difference]: Finished difference. Result has 332 places, 411 transitions, 5884 flow [2024-06-03 20:17:37,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5646, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5884, PETRI_PLACES=332, PETRI_TRANSITIONS=411} [2024-06-03 20:17:37,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-03 20:17:37,223 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 411 transitions, 5884 flow [2024-06-03 20:17:37,224 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 20:17:37,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:37,224 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 20:17:37,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:17:37,224 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:37,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:37,225 INFO L85 PathProgramCache]: Analyzing trace with hash -198465717, now seen corresponding path program 2 times [2024-06-03 20:17:37,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:37,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207158462] [2024-06-03 20:17:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:37,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:38,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:38,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207158462] [2024-06-03 20:17:38,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207158462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:38,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:38,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:38,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637923520] [2024-06-03 20:17:38,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:38,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:38,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:38,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:38,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:17:38,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 411 transitions, 5884 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 20:17:38,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:38,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:17:38,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:39,948 INFO L124 PetriNetUnfolderBase]: 4806/7444 cut-off events. [2024-06-03 20:17:39,948 INFO L125 PetriNetUnfolderBase]: For 595824/595828 co-relation queries the response was YES. [2024-06-03 20:17:40,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58053 conditions, 7444 events. 4806/7444 cut-off events. For 595824/595828 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 44341 event pairs, 1377 based on Foata normal form. 7/7451 useless extension candidates. Maximal degree in co-relation 57891. Up to 7167 conditions per place. [2024-06-03 20:17:40,061 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 377 selfloop transitions, 70 changer transitions 0/450 dead transitions. [2024-06-03 20:17:40,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 450 transitions, 7306 flow [2024-06-03 20:17:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:17:40,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 20:17:40,062 INFO L175 Difference]: Start difference. First operand has 332 places, 411 transitions, 5884 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:17:40,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 450 transitions, 7306 flow [2024-06-03 20:17:42,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 450 transitions, 7197 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 20:17:42,398 INFO L231 Difference]: Finished difference. Result has 336 places, 431 transitions, 6261 flow [2024-06-03 20:17:42,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5781, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6261, PETRI_PLACES=336, PETRI_TRANSITIONS=431} [2024-06-03 20:17:42,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-03 20:17:42,399 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 431 transitions, 6261 flow [2024-06-03 20:17:42,399 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 20:17:42,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:42,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:42,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:17:42,400 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:42,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash -831082122, now seen corresponding path program 1 times [2024-06-03 20:17:42,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:42,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607600964] [2024-06-03 20:17:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:42,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:43,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:43,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607600964] [2024-06-03 20:17:43,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607600964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:43,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:43,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:43,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621865306] [2024-06-03 20:17:43,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:43,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:43,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:43,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:43,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:43,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:17:43,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 431 transitions, 6261 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 20:17:43,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:43,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:17:43,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:45,193 INFO L124 PetriNetUnfolderBase]: 4800/7445 cut-off events. [2024-06-03 20:17:45,193 INFO L125 PetriNetUnfolderBase]: For 610317/610317 co-relation queries the response was YES. [2024-06-03 20:17:45,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58732 conditions, 7445 events. 4800/7445 cut-off events. For 610317/610317 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 44486 event pairs, 2000 based on Foata normal form. 2/7447 useless extension candidates. Maximal degree in co-relation 58567. Up to 7330 conditions per place. [2024-06-03 20:17:45,299 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 419 selfloop transitions, 30 changer transitions 0/452 dead transitions. [2024-06-03 20:17:45,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 452 transitions, 7327 flow [2024-06-03 20:17:45,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:17:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:17:45,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-03 20:17:45,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 20:17:45,300 INFO L175 Difference]: Start difference. First operand has 336 places, 431 transitions, 6261 flow. Second operand 6 states and 105 transitions. [2024-06-03 20:17:45,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 452 transitions, 7327 flow [2024-06-03 20:17:47,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 452 transitions, 7187 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-03 20:17:47,734 INFO L231 Difference]: Finished difference. Result has 340 places, 434 transitions, 6280 flow [2024-06-03 20:17:47,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6121, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6280, PETRI_PLACES=340, PETRI_TRANSITIONS=434} [2024-06-03 20:17:47,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-03 20:17:47,735 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 434 transitions, 6280 flow [2024-06-03 20:17:47,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:47,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:47,735 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 20:17:47,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:17:47,735 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:47,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:47,736 INFO L85 PathProgramCache]: Analyzing trace with hash -838439507, now seen corresponding path program 3 times [2024-06-03 20:17:47,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:47,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69961399] [2024-06-03 20:17:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:47,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:48,681 INFO 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 20:17:48,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:48,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69961399] [2024-06-03 20:17:48,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69961399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:48,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:48,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:48,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952376788] [2024-06-03 20:17:48,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:48,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:48,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:48,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:48,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:48,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:17:48,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 434 transitions, 6280 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 20:17:48,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:48,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:17:48,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:50,585 INFO L124 PetriNetUnfolderBase]: 4807/7455 cut-off events. [2024-06-03 20:17:50,585 INFO L125 PetriNetUnfolderBase]: For 622461/622461 co-relation queries the response was YES. [2024-06-03 20:17:50,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59090 conditions, 7455 events. 4807/7455 cut-off events. For 622461/622461 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 44586 event pairs, 2006 based on Foata normal form. 3/7458 useless extension candidates. Maximal degree in co-relation 58923. Up to 7342 conditions per place. [2024-06-03 20:17:50,676 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 427 selfloop transitions, 29 changer transitions 0/459 dead transitions. [2024-06-03 20:17:50,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 459 transitions, 7343 flow [2024-06-03 20:17:50,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:50,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:50,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:17:50,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-03 20:17:50,677 INFO L175 Difference]: Start difference. First operand has 340 places, 434 transitions, 6280 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:17:50,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 459 transitions, 7343 flow [2024-06-03 20:17:52,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 459 transitions, 7227 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 20:17:52,666 INFO L231 Difference]: Finished difference. Result has 342 places, 437 transitions, 6284 flow [2024-06-03 20:17:52,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6164, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6284, PETRI_PLACES=342, PETRI_TRANSITIONS=437} [2024-06-03 20:17:52,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-03 20:17:52,666 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 437 transitions, 6284 flow [2024-06-03 20:17:52,666 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 20:17:52,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:52,667 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 20:17:52,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:17:52,667 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 20:17:52,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:52,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1465903481, now seen corresponding path program 1 times [2024-06-03 20:17:52,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:52,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608506636] [2024-06-03 20:17:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:52,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:54,157 INFO 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 20:17:54,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:54,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608506636] [2024-06-03 20:17:54,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608506636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:54,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:54,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:17:54,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422910926] [2024-06-03 20:17:54,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:54,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:17:54,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:54,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:17:54,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:17:54,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:17:54,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 437 transitions, 6284 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:54,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:54,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:17:54,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:56,318 INFO L124 PetriNetUnfolderBase]: 4875/7560 cut-off events. [2024-06-03 20:17:56,318 INFO L125 PetriNetUnfolderBase]: For 646929/646931 co-relation queries the response was YES. [2024-06-03 20:17:56,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59869 conditions, 7560 events. 4875/7560 cut-off events. For 646929/646931 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 45188 event pairs, 1039 based on Foata normal form. 14/7574 useless extension candidates. Maximal degree in co-relation 59702. Up to 7192 conditions per place. [2024-06-03 20:17:56,428 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 435 selfloop transitions, 47 changer transitions 0/485 dead transitions. [2024-06-03 20:17:56,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 485 transitions, 7504 flow [2024-06-03 20:17:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:17:56,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:17:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-03 20:17:56,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-03 20:17:56,429 INFO L175 Difference]: Start difference. First operand has 342 places, 437 transitions, 6284 flow. Second operand 11 states and 182 transitions. [2024-06-03 20:17:56,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 485 transitions, 7504 flow [2024-06-03 20:17:58,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 485 transitions, 7411 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 20:17:58,500 INFO L231 Difference]: Finished difference. Result has 348 places, 439 transitions, 6383 flow [2024-06-03 20:17:58,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6191, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6383, PETRI_PLACES=348, PETRI_TRANSITIONS=439} [2024-06-03 20:17:58,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-03 20:17:58,500 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 439 transitions, 6383 flow [2024-06-03 20:17:58,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:58,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:58,501 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 20:17:58,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:17:58,501 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:58,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:58,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1201331453, now seen corresponding path program 2 times [2024-06-03 20:17:58,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:58,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443380336] [2024-06-03 20:17:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:58,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:00,024 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 20:18:00,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:00,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443380336] [2024-06-03 20:18:00,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443380336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:00,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:00,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:18:00,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680318938] [2024-06-03 20:18:00,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:00,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:18:00,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:00,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:18:00,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:18:00,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:18:00,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 439 transitions, 6383 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:00,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:00,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:18:00,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:02,147 INFO L124 PetriNetUnfolderBase]: 4943/7676 cut-off events. [2024-06-03 20:18:02,147 INFO L125 PetriNetUnfolderBase]: For 670171/670173 co-relation queries the response was YES. [2024-06-03 20:18:02,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61012 conditions, 7676 events. 4943/7676 cut-off events. For 670171/670173 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46161 event pairs, 1037 based on Foata normal form. 14/7690 useless extension candidates. Maximal degree in co-relation 60844. Up to 7244 conditions per place. [2024-06-03 20:18:02,263 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 432 selfloop transitions, 52 changer transitions 0/487 dead transitions. [2024-06-03 20:18:02,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 487 transitions, 7599 flow [2024-06-03 20:18:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:18:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:18:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-03 20:18:02,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-03 20:18:02,264 INFO L175 Difference]: Start difference. First operand has 348 places, 439 transitions, 6383 flow. Second operand 11 states and 183 transitions. [2024-06-03 20:18:02,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 487 transitions, 7599 flow [2024-06-03 20:18:04,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 487 transitions, 7446 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-03 20:18:04,563 INFO L231 Difference]: Finished difference. Result has 350 places, 441 transitions, 6424 flow [2024-06-03 20:18:04,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6230, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6424, PETRI_PLACES=350, PETRI_TRANSITIONS=441} [2024-06-03 20:18:04,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-03 20:18:04,564 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 441 transitions, 6424 flow [2024-06-03 20:18:04,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:04,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:04,564 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 20:18:04,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:18:04,564 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:04,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:04,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1143239003, now seen corresponding path program 3 times [2024-06-03 20:18:04,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:04,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922954002] [2024-06-03 20:18:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:04,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:05,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:05,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922954002] [2024-06-03 20:18:05,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922954002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:05,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:05,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:18:05,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053193693] [2024-06-03 20:18:05,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:05,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:18:05,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:05,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:18:05,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:18:06,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:18:06,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 441 transitions, 6424 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:06,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:06,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:18:06,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:08,192 INFO L124 PetriNetUnfolderBase]: 5011/7788 cut-off events. [2024-06-03 20:18:08,193 INFO L125 PetriNetUnfolderBase]: For 686729/686731 co-relation queries the response was YES. [2024-06-03 20:18:08,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61771 conditions, 7788 events. 5011/7788 cut-off events. For 686729/686731 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46993 event pairs, 1071 based on Foata normal form. 14/7802 useless extension candidates. Maximal degree in co-relation 61602. Up to 7381 conditions per place. [2024-06-03 20:18:08,308 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 437 selfloop transitions, 50 changer transitions 0/490 dead transitions. [2024-06-03 20:18:08,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 490 transitions, 7651 flow [2024-06-03 20:18:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:18:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:18:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-03 20:18:08,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-03 20:18:08,309 INFO L175 Difference]: Start difference. First operand has 350 places, 441 transitions, 6424 flow. Second operand 11 states and 181 transitions. [2024-06-03 20:18:08,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 490 transitions, 7651 flow [2024-06-03 20:18:10,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 490 transitions, 7504 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-03 20:18:10,361 INFO L231 Difference]: Finished difference. Result has 353 places, 443 transitions, 6472 flow [2024-06-03 20:18:10,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6277, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6472, PETRI_PLACES=353, PETRI_TRANSITIONS=443} [2024-06-03 20:18:10,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-03 20:18:10,362 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 443 transitions, 6472 flow [2024-06-03 20:18:10,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:10,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:10,362 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 20:18:10,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:18:10,363 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:10,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:10,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1419183839, now seen corresponding path program 4 times [2024-06-03 20:18:10,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:10,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119039105] [2024-06-03 20:18:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:10,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:12,290 INFO 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 20:18:12,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:12,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119039105] [2024-06-03 20:18:12,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119039105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:12,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:12,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:18:12,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637854797] [2024-06-03 20:18:12,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:12,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:18:12,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:12,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:18:12,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:18:12,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:18:12,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 443 transitions, 6472 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 20:18:12,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:12,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:18:12,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:14,559 INFO L124 PetriNetUnfolderBase]: 5052/7859 cut-off events. [2024-06-03 20:18:14,559 INFO L125 PetriNetUnfolderBase]: For 703611/703611 co-relation queries the response was YES. [2024-06-03 20:18:14,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62300 conditions, 7859 events. 5052/7859 cut-off events. For 703611/703611 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 47540 event pairs, 1046 based on Foata normal form. 12/7871 useless extension candidates. Maximal degree in co-relation 62130. Up to 7370 conditions per place. [2024-06-03 20:18:14,681 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 420 selfloop transitions, 69 changer transitions 0/492 dead transitions. [2024-06-03 20:18:14,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 492 transitions, 7699 flow [2024-06-03 20:18:14,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:18:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:18:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-03 20:18:14,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-03 20:18:14,683 INFO L175 Difference]: Start difference. First operand has 353 places, 443 transitions, 6472 flow. Second operand 11 states and 185 transitions. [2024-06-03 20:18:14,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 492 transitions, 7699 flow [2024-06-03 20:18:16,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 492 transitions, 7529 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-03 20:18:16,903 INFO L231 Difference]: Finished difference. Result has 354 places, 444 transitions, 6516 flow [2024-06-03 20:18:16,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6302, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6516, PETRI_PLACES=354, PETRI_TRANSITIONS=444} [2024-06-03 20:18:16,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-03 20:18:16,904 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 444 transitions, 6516 flow [2024-06-03 20:18:16,904 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 20:18:16,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:16,904 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 20:18:16,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:18:16,904 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:16,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:16,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1248481409, now seen corresponding path program 5 times [2024-06-03 20:18:16,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:16,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988607966] [2024-06-03 20:18:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:16,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:18,644 INFO 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 20:18:18,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:18,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988607966] [2024-06-03 20:18:18,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988607966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:18,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:18,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:18:18,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297733074] [2024-06-03 20:18:18,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:18,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:18:18,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:18,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:18:18,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:18:18,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:18:18,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 444 transitions, 6516 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 20:18:18,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:18,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:18:18,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:20,957 INFO L124 PetriNetUnfolderBase]: 5093/7930 cut-off events. [2024-06-03 20:18:20,957 INFO L125 PetriNetUnfolderBase]: For 721148/721148 co-relation queries the response was YES. [2024-06-03 20:18:21,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62906 conditions, 7930 events. 5093/7930 cut-off events. For 721148/721148 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 48117 event pairs, 1056 based on Foata normal form. 12/7942 useless extension candidates. Maximal degree in co-relation 62735. Up to 7441 conditions per place. [2024-06-03 20:18:21,078 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 423 selfloop transitions, 66 changer transitions 0/492 dead transitions. [2024-06-03 20:18:21,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 492 transitions, 7741 flow [2024-06-03 20:18:21,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:18:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:18:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-03 20:18:21,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-03 20:18:21,079 INFO L175 Difference]: Start difference. First operand has 354 places, 444 transitions, 6516 flow. Second operand 11 states and 185 transitions. [2024-06-03 20:18:21,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 492 transitions, 7741 flow [2024-06-03 20:18:22,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 492 transitions, 7545 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-03 20:18:22,841 INFO L231 Difference]: Finished difference. Result has 356 places, 445 transitions, 6530 flow [2024-06-03 20:18:22,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6530, PETRI_PLACES=356, PETRI_TRANSITIONS=445} [2024-06-03 20:18:22,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-03 20:18:22,842 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 445 transitions, 6530 flow [2024-06-03 20:18:22,842 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 20:18:22,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:22,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:22,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:18:22,842 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:22,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:22,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1248366089, now seen corresponding path program 6 times [2024-06-03 20:18:22,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:22,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905010194] [2024-06-03 20:18:22,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:22,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:24,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:24,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905010194] [2024-06-03 20:18:24,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905010194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:24,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:24,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:18:24,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347191766] [2024-06-03 20:18:24,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:24,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:18:24,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:24,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:18:24,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:18:24,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:18:24,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 445 transitions, 6530 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 20:18:24,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:24,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:18:24,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:27,154 INFO L124 PetriNetUnfolderBase]: 5134/8001 cut-off events. [2024-06-03 20:18:27,154 INFO L125 PetriNetUnfolderBase]: For 739696/739696 co-relation queries the response was YES. [2024-06-03 20:18:27,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63396 conditions, 8001 events. 5134/8001 cut-off events. For 739696/739696 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 48712 event pairs, 1059 based on Foata normal form. 12/8013 useless extension candidates. Maximal degree in co-relation 63224. Up to 7453 conditions per place. [2024-06-03 20:18:27,257 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 419 selfloop transitions, 71 changer transitions 0/493 dead transitions. [2024-06-03 20:18:27,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 493 transitions, 7759 flow [2024-06-03 20:18:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:18:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:18:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-03 20:18:27,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-03 20:18:27,258 INFO L175 Difference]: Start difference. First operand has 356 places, 445 transitions, 6530 flow. Second operand 11 states and 185 transitions. [2024-06-03 20:18:27,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 493 transitions, 7759 flow [2024-06-03 20:18:29,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 493 transitions, 7567 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-03 20:18:29,648 INFO L231 Difference]: Finished difference. Result has 358 places, 446 transitions, 6560 flow [2024-06-03 20:18:29,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6338, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6560, PETRI_PLACES=358, PETRI_TRANSITIONS=446} [2024-06-03 20:18:29,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-03 20:18:29,649 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 446 transitions, 6560 flow [2024-06-03 20:18:29,649 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 20:18:29,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:29,650 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 20:18:29,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:18:29,650 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 20:18:29,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:29,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1032375058, now seen corresponding path program 1 times [2024-06-03 20:18:29,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:29,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331990548] [2024-06-03 20:18:29,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:29,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:31,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:31,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331990548] [2024-06-03 20:18:31,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331990548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:31,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:31,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:31,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348242366] [2024-06-03 20:18:31,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:31,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:31,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:31,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:31,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:31,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:18:31,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 446 transitions, 6560 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 20:18:31,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:31,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:18:31,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:33,334 INFO L124 PetriNetUnfolderBase]: 5278/8203 cut-off events. [2024-06-03 20:18:33,334 INFO L125 PetriNetUnfolderBase]: For 756722/756724 co-relation queries the response was YES. [2024-06-03 20:18:33,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64955 conditions, 8203 events. 5278/8203 cut-off events. For 756722/756724 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 49912 event pairs, 1211 based on Foata normal form. 6/8209 useless extension candidates. Maximal degree in co-relation 64782. Up to 7808 conditions per place. [2024-06-03 20:18:33,461 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 445 selfloop transitions, 66 changer transitions 0/514 dead transitions. [2024-06-03 20:18:33,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 514 transitions, 8536 flow [2024-06-03 20:18:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 20:18:33,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:18:33,462 INFO L175 Difference]: Start difference. First operand has 358 places, 446 transitions, 6560 flow. Second operand 9 states and 162 transitions. [2024-06-03 20:18:33,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 514 transitions, 8536 flow [2024-06-03 20:18:36,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 514 transitions, 8332 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-03 20:18:36,074 INFO L231 Difference]: Finished difference. Result has 360 places, 471 transitions, 6834 flow [2024-06-03 20:18:36,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6356, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6834, PETRI_PLACES=360, PETRI_TRANSITIONS=471} [2024-06-03 20:18:36,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-03 20:18:36,074 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 471 transitions, 6834 flow [2024-06-03 20:18:36,075 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 20:18:36,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:36,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:36,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:18:36,075 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 20:18:36,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:36,075 INFO L85 PathProgramCache]: Analyzing trace with hash 486043194, now seen corresponding path program 2 times [2024-06-03 20:18:36,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:36,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104079237] [2024-06-03 20:18:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:36,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:37,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:37,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104079237] [2024-06-03 20:18:37,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104079237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:37,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:37,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:37,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917456227] [2024-06-03 20:18:37,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:37,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:37,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:37,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:18:37,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 471 transitions, 6834 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 20:18:37,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:37,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:18:37,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:39,602 INFO L124 PetriNetUnfolderBase]: 5298/8229 cut-off events. [2024-06-03 20:18:39,603 INFO L125 PetriNetUnfolderBase]: For 768044/768044 co-relation queries the response was YES. [2024-06-03 20:18:39,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65419 conditions, 8229 events. 5298/8229 cut-off events. For 768044/768044 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 50005 event pairs, 1133 based on Foata normal form. 4/8233 useless extension candidates. Maximal degree in co-relation 65243. Up to 7824 conditions per place. [2024-06-03 20:18:39,729 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 435 selfloop transitions, 73 changer transitions 0/511 dead transitions. [2024-06-03 20:18:39,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 511 transitions, 8377 flow [2024-06-03 20:18:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:39,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:39,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 20:18:39,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-03 20:18:39,730 INFO L175 Difference]: Start difference. First operand has 360 places, 471 transitions, 6834 flow. Second operand 9 states and 156 transitions. [2024-06-03 20:18:39,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 511 transitions, 8377 flow [2024-06-03 20:18:42,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 511 transitions, 8298 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:42,478 INFO L231 Difference]: Finished difference. Result has 368 places, 477 transitions, 7017 flow [2024-06-03 20:18:42,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6763, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7017, PETRI_PLACES=368, PETRI_TRANSITIONS=477} [2024-06-03 20:18:42,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-03 20:18:42,479 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 477 transitions, 7017 flow [2024-06-03 20:18:42,479 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 20:18:42,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:42,479 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 20:18:42,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:18:42,480 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 20:18:42,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:42,480 INFO L85 PathProgramCache]: Analyzing trace with hash -401441856, now seen corresponding path program 3 times [2024-06-03 20:18:42,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:42,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879105800] [2024-06-03 20:18:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:42,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:43,968 INFO 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 20:18:43,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:43,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879105800] [2024-06-03 20:18:43,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879105800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:43,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:43,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:43,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64958514] [2024-06-03 20:18:43,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:43,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:43,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:43,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:43,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:44,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:18:44,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 477 transitions, 7017 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 20:18:44,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:44,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:18:44,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:46,214 INFO L124 PetriNetUnfolderBase]: 5286/8213 cut-off events. [2024-06-03 20:18:46,214 INFO L125 PetriNetUnfolderBase]: For 772044/772044 co-relation queries the response was YES. [2024-06-03 20:18:46,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65412 conditions, 8213 events. 5286/8213 cut-off events. For 772044/772044 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 49974 event pairs, 1131 based on Foata normal form. 4/8217 useless extension candidates. Maximal degree in co-relation 65233. Up to 7816 conditions per place. [2024-06-03 20:18:46,337 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 439 selfloop transitions, 71 changer transitions 0/513 dead transitions. [2024-06-03 20:18:46,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 513 transitions, 8492 flow [2024-06-03 20:18:46,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 20:18:46,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-03 20:18:46,338 INFO L175 Difference]: Start difference. First operand has 368 places, 477 transitions, 7017 flow. Second operand 9 states and 157 transitions. [2024-06-03 20:18:46,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 513 transitions, 8492 flow [2024-06-03 20:18:49,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 513 transitions, 8309 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:49,196 INFO L231 Difference]: Finished difference. Result has 373 places, 478 transitions, 7001 flow [2024-06-03 20:18:49,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6834, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7001, PETRI_PLACES=373, PETRI_TRANSITIONS=478} [2024-06-03 20:18:49,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-03 20:18:49,197 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 478 transitions, 7001 flow [2024-06-03 20:18:49,197 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 20:18:49,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:49,197 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 20:18:49,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:18:49,197 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:49,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:49,198 INFO L85 PathProgramCache]: Analyzing trace with hash 790581049, now seen corresponding path program 7 times [2024-06-03 20:18:49,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:49,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827270157] [2024-06-03 20:18:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:49,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:50,607 INFO 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 20:18:50,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:50,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827270157] [2024-06-03 20:18:50,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827270157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:50,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:50,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:18:50,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890272625] [2024-06-03 20:18:50,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:50,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:18:50,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:50,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:18:50,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:18:50,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:18:50,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 478 transitions, 7001 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:50,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:50,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:18:50,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:52,941 INFO L124 PetriNetUnfolderBase]: 5381/8376 cut-off events. [2024-06-03 20:18:52,941 INFO L125 PetriNetUnfolderBase]: For 819742/819744 co-relation queries the response was YES. [2024-06-03 20:18:53,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66586 conditions, 8376 events. 5381/8376 cut-off events. For 819742/819744 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 51392 event pairs, 1305 based on Foata normal form. 14/8390 useless extension candidates. Maximal degree in co-relation 66405. Up to 7934 conditions per place. [2024-06-03 20:18:53,072 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 474 selfloop transitions, 51 changer transitions 0/528 dead transitions. [2024-06-03 20:18:53,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 528 transitions, 8325 flow [2024-06-03 20:18:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:18:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:18:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-03 20:18:53,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-03 20:18:53,074 INFO L175 Difference]: Start difference. First operand has 373 places, 478 transitions, 7001 flow. Second operand 11 states and 179 transitions. [2024-06-03 20:18:53,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 528 transitions, 8325 flow [2024-06-03 20:18:56,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 528 transitions, 8193 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:56,505 INFO L231 Difference]: Finished difference. Result has 378 places, 481 transitions, 7091 flow [2024-06-03 20:18:56,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6869, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7091, PETRI_PLACES=378, PETRI_TRANSITIONS=481} [2024-06-03 20:18:56,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-03 20:18:56,506 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 481 transitions, 7091 flow [2024-06-03 20:18:56,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:56,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:56,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:56,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:18:56,506 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 20:18:56,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:56,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1258901060, now seen corresponding path program 4 times [2024-06-03 20:18:56,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:56,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118001166] [2024-06-03 20:18:56,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:56,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:57,699 INFO 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 20:18:57,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:57,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118001166] [2024-06-03 20:18:57,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118001166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:57,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:57,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:57,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807171078] [2024-06-03 20:18:57,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:57,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:57,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:57,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:57,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:57,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:18:57,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 481 transitions, 7091 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 20:18:57,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:57,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:18:57,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:59,948 INFO L124 PetriNetUnfolderBase]: 5399/8408 cut-off events. [2024-06-03 20:18:59,948 INFO L125 PetriNetUnfolderBase]: For 800460/800462 co-relation queries the response was YES. [2024-06-03 20:19:00,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66557 conditions, 8408 events. 5399/8408 cut-off events. For 800460/800462 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 51611 event pairs, 1442 based on Foata normal form. 6/8414 useless extension candidates. Maximal degree in co-relation 66375. Up to 7991 conditions per place. [2024-06-03 20:19:00,083 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 438 selfloop transitions, 80 changer transitions 0/521 dead transitions. [2024-06-03 20:19:00,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 521 transitions, 8459 flow [2024-06-03 20:19:00,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:00,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:00,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:19:00,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-03 20:19:00,084 INFO L175 Difference]: Start difference. First operand has 378 places, 481 transitions, 7091 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:19:00,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 521 transitions, 8459 flow [2024-06-03 20:19:02,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 521 transitions, 8266 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-03 20:19:02,826 INFO L231 Difference]: Finished difference. Result has 379 places, 487 transitions, 7134 flow [2024-06-03 20:19:02,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6898, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7134, PETRI_PLACES=379, PETRI_TRANSITIONS=487} [2024-06-03 20:19:02,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-03 20:19:02,826 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 487 transitions, 7134 flow [2024-06-03 20:19:02,826 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 20:19:02,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:02,827 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 20:19:02,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:19:02,827 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 20:19:02,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:02,827 INFO L85 PathProgramCache]: Analyzing trace with hash -467064222, now seen corresponding path program 1 times [2024-06-03 20:19:02,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:02,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999843023] [2024-06-03 20:19:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:02,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:03,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:03,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999843023] [2024-06-03 20:19:03,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999843023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:03,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:03,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:03,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785426406] [2024-06-03 20:19:03,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:03,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:03,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:03,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:03,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:03,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:19:03,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 487 transitions, 7134 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 20:19:03,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:03,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:19:03,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:05,769 INFO L124 PetriNetUnfolderBase]: 5461/8490 cut-off events. [2024-06-03 20:19:05,769 INFO L125 PetriNetUnfolderBase]: For 819391/819403 co-relation queries the response was YES. [2024-06-03 20:19:05,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67685 conditions, 8490 events. 5461/8490 cut-off events. For 819391/819403 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 52097 event pairs, 1670 based on Foata normal form. 14/8504 useless extension candidates. Maximal degree in co-relation 67501. Up to 8295 conditions per place. [2024-06-03 20:19:05,882 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 477 selfloop transitions, 55 changer transitions 0/535 dead transitions. [2024-06-03 20:19:05,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 535 transitions, 8867 flow [2024-06-03 20:19:05,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-03 20:19:05,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-03 20:19:05,883 INFO L175 Difference]: Start difference. First operand has 379 places, 487 transitions, 7134 flow. Second operand 9 states and 149 transitions. [2024-06-03 20:19:05,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 535 transitions, 8867 flow [2024-06-03 20:19:08,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 535 transitions, 8739 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:08,883 INFO L231 Difference]: Finished difference. Result has 385 places, 506 transitions, 7575 flow [2024-06-03 20:19:08,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7006, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7575, PETRI_PLACES=385, PETRI_TRANSITIONS=506} [2024-06-03 20:19:08,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-03 20:19:08,883 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 506 transitions, 7575 flow [2024-06-03 20:19:08,883 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 20:19:08,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:08,884 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 20:19:08,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:19:08,884 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 20:19:08,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:08,884 INFO L85 PathProgramCache]: Analyzing trace with hash 507084172, now seen corresponding path program 2 times [2024-06-03 20:19:08,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:08,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522113565] [2024-06-03 20:19:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:08,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:09,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:09,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522113565] [2024-06-03 20:19:09,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522113565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:09,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:09,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:09,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053386392] [2024-06-03 20:19:09,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:09,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:09,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:09,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:09,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:09,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:19:09,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 506 transitions, 7575 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 20:19:09,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:09,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:19:09,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:11,904 INFO L124 PetriNetUnfolderBase]: 5455/8481 cut-off events. [2024-06-03 20:19:11,904 INFO L125 PetriNetUnfolderBase]: For 831722/831726 co-relation queries the response was YES. [2024-06-03 20:19:11,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67859 conditions, 8481 events. 5455/8481 cut-off events. For 831722/831726 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 52029 event pairs, 1668 based on Foata normal form. 6/8487 useless extension candidates. Maximal degree in co-relation 67672. Up to 8332 conditions per place. [2024-06-03 20:19:12,024 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 481 selfloop transitions, 47 changer transitions 0/531 dead transitions. [2024-06-03 20:19:12,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 531 transitions, 8719 flow [2024-06-03 20:19:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 20:19:12,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 20:19:12,026 INFO L175 Difference]: Start difference. First operand has 385 places, 506 transitions, 7575 flow. Second operand 9 states and 144 transitions. [2024-06-03 20:19:12,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 531 transitions, 8719 flow [2024-06-03 20:19:16,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 531 transitions, 8568 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-03 20:19:16,266 INFO L231 Difference]: Finished difference. Result has 391 places, 506 transitions, 7524 flow [2024-06-03 20:19:16,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7424, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7524, PETRI_PLACES=391, PETRI_TRANSITIONS=506} [2024-06-03 20:19:16,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-03 20:19:16,266 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 506 transitions, 7524 flow [2024-06-03 20:19:16,266 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 20:19:16,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:16,267 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 20:19:16,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:19:16,267 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 20:19:16,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:16,267 INFO L85 PathProgramCache]: Analyzing trace with hash 507084358, now seen corresponding path program 1 times [2024-06-03 20:19:16,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:16,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841153421] [2024-06-03 20:19:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:16,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:17,223 INFO 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 20:19:17,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841153421] [2024-06-03 20:19:17,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841153421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:17,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:17,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:17,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3246298] [2024-06-03 20:19:17,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:17,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:17,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:17,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:17,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:17,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:19:17,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 506 transitions, 7524 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 20:19:17,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:17,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:19:17,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:19,534 INFO L124 PetriNetUnfolderBase]: 5512/8560 cut-off events. [2024-06-03 20:19:19,534 INFO L125 PetriNetUnfolderBase]: For 873672/873676 co-relation queries the response was YES. [2024-06-03 20:19:19,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68943 conditions, 8560 events. 5512/8560 cut-off events. For 873672/873676 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 52397 event pairs, 1678 based on Foata normal form. 8/8568 useless extension candidates. Maximal degree in co-relation 68754. Up to 8306 conditions per place. [2024-06-03 20:19:19,671 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 479 selfloop transitions, 64 changer transitions 0/546 dead transitions. [2024-06-03 20:19:19,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 546 transitions, 9044 flow [2024-06-03 20:19:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 20:19:19,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 20:19:19,673 INFO L175 Difference]: Start difference. First operand has 391 places, 506 transitions, 7524 flow. Second operand 9 states and 153 transitions. [2024-06-03 20:19:19,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 546 transitions, 9044 flow [2024-06-03 20:19:23,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 546 transitions, 8899 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:23,090 INFO L231 Difference]: Finished difference. Result has 396 places, 516 transitions, 7696 flow [2024-06-03 20:19:23,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7379, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7696, PETRI_PLACES=396, PETRI_TRANSITIONS=516} [2024-06-03 20:19:23,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-03 20:19:23,091 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 516 transitions, 7696 flow [2024-06-03 20:19:23,091 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 20:19:23,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:23,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:23,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:19:23,091 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 20:19:23,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:23,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1839134364, now seen corresponding path program 2 times [2024-06-03 20:19:23,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:23,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609356774] [2024-06-03 20:19:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:23,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:23,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:23,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609356774] [2024-06-03 20:19:23,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609356774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:23,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:23,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:23,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220716241] [2024-06-03 20:19:23,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:23,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:23,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:23,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:23,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:24,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:19:24,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 516 transitions, 7696 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 20:19:24,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:24,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:19:24,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:26,217 INFO L124 PetriNetUnfolderBase]: 5532/8588 cut-off events. [2024-06-03 20:19:26,217 INFO L125 PetriNetUnfolderBase]: For 894535/894539 co-relation queries the response was YES. [2024-06-03 20:19:26,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70088 conditions, 8588 events. 5532/8588 cut-off events. For 894535/894539 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 52607 event pairs, 1700 based on Foata normal form. 8/8596 useless extension candidates. Maximal degree in co-relation 69897. Up to 8390 conditions per place. [2024-06-03 20:19:26,362 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 486 selfloop transitions, 57 changer transitions 0/546 dead transitions. [2024-06-03 20:19:26,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 546 transitions, 8972 flow [2024-06-03 20:19:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:26,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 20:19:26,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 20:19:26,363 INFO L175 Difference]: Start difference. First operand has 396 places, 516 transitions, 7696 flow. Second operand 9 states and 144 transitions. [2024-06-03 20:19:26,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 546 transitions, 8972 flow [2024-06-03 20:19:30,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 546 transitions, 8889 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-03 20:19:30,275 INFO L231 Difference]: Finished difference. Result has 403 places, 522 transitions, 7849 flow [2024-06-03 20:19:30,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7613, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7849, PETRI_PLACES=403, PETRI_TRANSITIONS=522} [2024-06-03 20:19:30,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-03 20:19:30,276 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 522 transitions, 7849 flow [2024-06-03 20:19:30,276 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 20:19:30,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:30,276 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 20:19:30,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:19:30,276 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 20:19:30,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1060148128, now seen corresponding path program 3 times [2024-06-03 20:19:30,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:30,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113490505] [2024-06-03 20:19:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:30,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:31,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:31,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113490505] [2024-06-03 20:19:31,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113490505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:31,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:31,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:31,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697148709] [2024-06-03 20:19:31,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:31,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:31,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:31,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:31,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:31,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:19:31,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 522 transitions, 7849 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 20:19:31,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:31,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:19:31,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:33,432 INFO L124 PetriNetUnfolderBase]: 5520/8572 cut-off events. [2024-06-03 20:19:33,432 INFO L125 PetriNetUnfolderBase]: For 895834/895838 co-relation queries the response was YES. [2024-06-03 20:19:33,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70303 conditions, 8572 events. 5520/8572 cut-off events. For 895834/895838 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 52506 event pairs, 1691 based on Foata normal form. 8/8580 useless extension candidates. Maximal degree in co-relation 70108. Up to 8368 conditions per place. [2024-06-03 20:19:33,576 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 484 selfloop transitions, 59 changer transitions 0/546 dead transitions. [2024-06-03 20:19:33,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 546 transitions, 9029 flow [2024-06-03 20:19:33,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 20:19:33,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 20:19:33,577 INFO L175 Difference]: Start difference. First operand has 403 places, 522 transitions, 7849 flow. Second operand 9 states and 144 transitions. [2024-06-03 20:19:33,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 546 transitions, 9029 flow [2024-06-03 20:19:38,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 546 transitions, 8808 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:38,200 INFO L231 Difference]: Finished difference. Result has 406 places, 522 transitions, 7752 flow [2024-06-03 20:19:38,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7628, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7752, PETRI_PLACES=406, PETRI_TRANSITIONS=522} [2024-06-03 20:19:38,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-03 20:19:38,200 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 522 transitions, 7752 flow [2024-06-03 20:19:38,201 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 20:19:38,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:38,201 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 20:19:38,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:19:38,201 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 20:19:38,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:38,201 INFO L85 PathProgramCache]: Analyzing trace with hash 684215692, now seen corresponding path program 3 times [2024-06-03 20:19:38,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:38,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954063188] [2024-06-03 20:19:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:38,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:38,924 INFO 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 20:19:38,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:38,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954063188] [2024-06-03 20:19:38,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954063188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:38,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:38,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:38,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074862158] [2024-06-03 20:19:38,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:38,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:38,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:38,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:38,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:19:38,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 522 transitions, 7752 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 20:19:38,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:38,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:19:38,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:41,321 INFO L124 PetriNetUnfolderBase]: 5514/8564 cut-off events. [2024-06-03 20:19:41,321 INFO L125 PetriNetUnfolderBase]: For 894590/894594 co-relation queries the response was YES. [2024-06-03 20:19:41,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69945 conditions, 8564 events. 5514/8564 cut-off events. For 894590/894594 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 52498 event pairs, 1688 based on Foata normal form. 6/8570 useless extension candidates. Maximal degree in co-relation 69749. Up to 8441 conditions per place. [2024-06-03 20:19:41,440 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 498 selfloop transitions, 42 changer transitions 0/543 dead transitions. [2024-06-03 20:19:41,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 543 transitions, 8910 flow [2024-06-03 20:19:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:41,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-03 20:19:41,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-03 20:19:41,441 INFO L175 Difference]: Start difference. First operand has 406 places, 522 transitions, 7752 flow. Second operand 9 states and 138 transitions. [2024-06-03 20:19:41,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 543 transitions, 8910 flow [2024-06-03 20:19:45,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 543 transitions, 8721 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:45,245 INFO L231 Difference]: Finished difference. Result has 410 places, 522 transitions, 7653 flow [2024-06-03 20:19:45,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7563, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7653, PETRI_PLACES=410, PETRI_TRANSITIONS=522} [2024-06-03 20:19:45,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-03 20:19:45,246 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 522 transitions, 7653 flow [2024-06-03 20:19:45,246 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 20:19:45,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:45,246 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 20:19:45,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:19:45,246 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 20:19:45,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:45,247 INFO L85 PathProgramCache]: Analyzing trace with hash 684461956, now seen corresponding path program 1 times [2024-06-03 20:19:45,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:45,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239829228] [2024-06-03 20:19:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:45,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:46,389 INFO 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 20:19:46,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:46,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239829228] [2024-06-03 20:19:46,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239829228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:46,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:46,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:46,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832231348] [2024-06-03 20:19:46,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:46,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:46,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:46,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:46,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:46,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:19:46,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 522 transitions, 7653 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 20:19:46,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:46,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:19:46,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:48,895 INFO L124 PetriNetUnfolderBase]: 5557/8629 cut-off events. [2024-06-03 20:19:48,895 INFO L125 PetriNetUnfolderBase]: For 921513/921517 co-relation queries the response was YES. [2024-06-03 20:19:49,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70592 conditions, 8629 events. 5557/8629 cut-off events. For 921513/921517 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 52921 event pairs, 1695 based on Foata normal form. 8/8637 useless extension candidates. Maximal degree in co-relation 70395. Up to 8415 conditions per place. [2024-06-03 20:19:49,035 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 495 selfloop transitions, 66 changer transitions 0/564 dead transitions. [2024-06-03 20:19:49,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 564 transitions, 9192 flow [2024-06-03 20:19:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 20:19:49,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-03 20:19:49,036 INFO L175 Difference]: Start difference. First operand has 410 places, 522 transitions, 7653 flow. Second operand 9 states and 145 transitions. [2024-06-03 20:19:49,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 564 transitions, 9192 flow [2024-06-03 20:19:52,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 564 transitions, 9080 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:52,990 INFO L231 Difference]: Finished difference. Result has 415 places, 540 transitions, 8057 flow [2024-06-03 20:19:52,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7551, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8057, PETRI_PLACES=415, PETRI_TRANSITIONS=540} [2024-06-03 20:19:52,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-03 20:19:52,990 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 540 transitions, 8057 flow [2024-06-03 20:19:52,991 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 20:19:52,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:52,991 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 20:19:52,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:19:52,991 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:52,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2076484763, now seen corresponding path program 8 times [2024-06-03 20:19:52,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:52,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139594220] [2024-06-03 20:19:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:52,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:54,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:54,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139594220] [2024-06-03 20:19:54,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139594220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:54,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:54,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:19:54,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695405543] [2024-06-03 20:19:54,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:54,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:19:54,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:54,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:19:54,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:19:54,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:19:54,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 540 transitions, 8057 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:54,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:54,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:19:54,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:56,962 INFO L124 PetriNetUnfolderBase]: 5598/8696 cut-off events. [2024-06-03 20:19:56,962 INFO L125 PetriNetUnfolderBase]: For 973158/973160 co-relation queries the response was YES. [2024-06-03 20:19:57,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71921 conditions, 8696 events. 5598/8696 cut-off events. For 973158/973160 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 53347 event pairs, 1290 based on Foata normal form. 14/8710 useless extension candidates. Maximal degree in co-relation 71720. Up to 7759 conditions per place. [2024-06-03 20:19:57,121 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 502 selfloop transitions, 77 changer transitions 0/582 dead transitions. [2024-06-03 20:19:57,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 582 transitions, 9445 flow [2024-06-03 20:19:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:19:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:19:57,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-03 20:19:57,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-03 20:19:57,122 INFO L175 Difference]: Start difference. First operand has 415 places, 540 transitions, 8057 flow. Second operand 10 states and 162 transitions. [2024-06-03 20:19:57,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 582 transitions, 9445 flow [2024-06-03 20:20:01,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 582 transitions, 9352 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-03 20:20:01,775 INFO L231 Difference]: Finished difference. Result has 423 places, 541 transitions, 8211 flow [2024-06-03 20:20:01,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7964, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8211, PETRI_PLACES=423, PETRI_TRANSITIONS=541} [2024-06-03 20:20:01,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-03 20:20:01,775 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 541 transitions, 8211 flow [2024-06-03 20:20:01,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:01,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:01,775 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 20:20:01,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:20:01,775 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:01,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:01,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1411015157, now seen corresponding path program 9 times [2024-06-03 20:20:01,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:01,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376604511] [2024-06-03 20:20:01,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:01,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:03,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:03,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376604511] [2024-06-03 20:20:03,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376604511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:03,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:03,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:20:03,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515084185] [2024-06-03 20:20:03,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:03,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:20:03,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:03,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:20:03,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:20:03,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:20:03,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 541 transitions, 8211 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 20:20:03,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:03,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:20:03,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:05,953 INFO L124 PetriNetUnfolderBase]: 5639/8779 cut-off events. [2024-06-03 20:20:05,954 INFO L125 PetriNetUnfolderBase]: For 1003700/1003702 co-relation queries the response was YES. [2024-06-03 20:20:06,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73116 conditions, 8779 events. 5639/8779 cut-off events. For 1003700/1003702 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 54304 event pairs, 1473 based on Foata normal form. 14/8793 useless extension candidates. Maximal degree in co-relation 72913. Up to 8125 conditions per place. [2024-06-03 20:20:06,111 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 516 selfloop transitions, 64 changer transitions 0/583 dead transitions. [2024-06-03 20:20:06,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 583 transitions, 9603 flow [2024-06-03 20:20:06,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:20:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:20:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-03 20:20:06,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-03 20:20:06,114 INFO L175 Difference]: Start difference. First operand has 423 places, 541 transitions, 8211 flow. Second operand 10 states and 164 transitions. [2024-06-03 20:20:06,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 583 transitions, 9603 flow [2024-06-03 20:20:10,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 583 transitions, 9376 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-03 20:20:10,398 INFO L231 Difference]: Finished difference. Result has 425 places, 542 transitions, 8202 flow [2024-06-03 20:20:10,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7988, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8202, PETRI_PLACES=425, PETRI_TRANSITIONS=542} [2024-06-03 20:20:10,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-03 20:20:10,399 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 542 transitions, 8202 flow [2024-06-03 20:20:10,399 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 20:20:10,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:10,399 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 20:20:10,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:20:10,399 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:10,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:10,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1165493113, now seen corresponding path program 10 times [2024-06-03 20:20:10,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:10,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908738964] [2024-06-03 20:20:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:10,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:11,933 INFO 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 20:20:11,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:11,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908738964] [2024-06-03 20:20:11,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908738964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:11,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:11,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:20:11,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845567116] [2024-06-03 20:20:11,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:11,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:20:11,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:11,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:20:11,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:20:12,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:20:12,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 542 transitions, 8202 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:12,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:12,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:20:12,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:14,392 INFO L124 PetriNetUnfolderBase]: 5680/8850 cut-off events. [2024-06-03 20:20:14,392 INFO L125 PetriNetUnfolderBase]: For 985165/985167 co-relation queries the response was YES. [2024-06-03 20:20:14,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73139 conditions, 8850 events. 5680/8850 cut-off events. For 985165/985167 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 54882 event pairs, 1425 based on Foata normal form. 14/8864 useless extension candidates. Maximal degree in co-relation 72935. Up to 8050 conditions per place. [2024-06-03 20:20:14,536 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 507 selfloop transitions, 74 changer transitions 0/584 dead transitions. [2024-06-03 20:20:14,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 584 transitions, 9594 flow [2024-06-03 20:20:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:20:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:20:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-03 20:20:14,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 20:20:14,537 INFO L175 Difference]: Start difference. First operand has 425 places, 542 transitions, 8202 flow. Second operand 10 states and 165 transitions. [2024-06-03 20:20:14,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 584 transitions, 9594 flow [2024-06-03 20:20:19,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 584 transitions, 9384 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-03 20:20:19,017 INFO L231 Difference]: Finished difference. Result has 427 places, 543 transitions, 8228 flow [2024-06-03 20:20:19,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7998, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8228, PETRI_PLACES=427, PETRI_TRANSITIONS=543} [2024-06-03 20:20:19,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-03 20:20:19,018 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 543 transitions, 8228 flow [2024-06-03 20:20:19,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:19,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:19,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:19,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:20:19,018 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 20:20:19,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:19,019 INFO L85 PathProgramCache]: Analyzing trace with hash 318994384, now seen corresponding path program 5 times [2024-06-03 20:20:19,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:19,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703762657] [2024-06-03 20:20:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:19,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:20,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:20,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703762657] [2024-06-03 20:20:20,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703762657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:20,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:20,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:20,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652507005] [2024-06-03 20:20:20,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:20,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:20,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:20,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:20,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:20,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:20:20,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 543 transitions, 8228 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 20:20:20,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:20,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:20:20,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:23,089 INFO L124 PetriNetUnfolderBase]: 5710/8888 cut-off events. [2024-06-03 20:20:23,089 INFO L125 PetriNetUnfolderBase]: For 951933/951935 co-relation queries the response was YES. [2024-06-03 20:20:23,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73004 conditions, 8888 events. 5710/8888 cut-off events. For 951933/951935 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 55053 event pairs, 1612 based on Foata normal form. 6/8894 useless extension candidates. Maximal degree in co-relation 72799. Up to 8421 conditions per place. [2024-06-03 20:20:23,242 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 471 selfloop transitions, 103 changer transitions 0/577 dead transitions. [2024-06-03 20:20:23,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 577 transitions, 9733 flow [2024-06-03 20:20:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:23,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:20:23,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 20:20:23,243 INFO L175 Difference]: Start difference. First operand has 427 places, 543 transitions, 8228 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:20:23,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 577 transitions, 9733 flow [2024-06-03 20:20:28,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 577 transitions, 9521 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-03 20:20:28,021 INFO L231 Difference]: Finished difference. Result has 428 places, 549 transitions, 8335 flow [2024-06-03 20:20:28,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8018, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8335, PETRI_PLACES=428, PETRI_TRANSITIONS=549} [2024-06-03 20:20:28,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-03 20:20:28,022 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 549 transitions, 8335 flow [2024-06-03 20:20:28,022 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 20:20:28,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:28,022 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 20:20:28,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:20:28,022 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:28,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:28,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1343251, now seen corresponding path program 11 times [2024-06-03 20:20:28,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:28,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971102914] [2024-06-03 20:20:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:28,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:29,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:29,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971102914] [2024-06-03 20:20:29,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971102914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:29,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:29,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:20:29,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034555667] [2024-06-03 20:20:29,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:29,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:20:29,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:29,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:20:29,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:20:30,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:20:30,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 549 transitions, 8335 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 20:20:30,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:30,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:20:30,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:32,716 INFO L124 PetriNetUnfolderBase]: 5751/8951 cut-off events. [2024-06-03 20:20:32,716 INFO L125 PetriNetUnfolderBase]: For 973425/973425 co-relation queries the response was YES. [2024-06-03 20:20:32,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73342 conditions, 8951 events. 5751/8951 cut-off events. For 973425/973425 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 55386 event pairs, 1149 based on Foata normal form. 12/8963 useless extension candidates. Maximal degree in co-relation 73135. Up to 7898 conditions per place. [2024-06-03 20:20:32,870 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 495 selfloop transitions, 103 changer transitions 0/601 dead transitions. [2024-06-03 20:20:32,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 601 transitions, 9823 flow [2024-06-03 20:20:32,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:20:32,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:20:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-03 20:20:32,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-03 20:20:32,871 INFO L175 Difference]: Start difference. First operand has 428 places, 549 transitions, 8335 flow. Second operand 11 states and 186 transitions. [2024-06-03 20:20:32,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 601 transitions, 9823 flow [2024-06-03 20:20:36,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 601 transitions, 9630 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 20:20:36,735 INFO L231 Difference]: Finished difference. Result has 433 places, 550 transitions, 8428 flow [2024-06-03 20:20:36,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8142, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8428, PETRI_PLACES=433, PETRI_TRANSITIONS=550} [2024-06-03 20:20:36,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-03 20:20:36,736 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 550 transitions, 8428 flow [2024-06-03 20:20:36,736 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 20:20:36,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:36,736 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 20:20:36,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:20:36,736 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:36,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:36,736 INFO L85 PathProgramCache]: Analyzing trace with hash -169359179, now seen corresponding path program 12 times [2024-06-03 20:20:36,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:36,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538545054] [2024-06-03 20:20:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:36,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:38,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:38,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538545054] [2024-06-03 20:20:38,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538545054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:38,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:38,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:20:38,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981777783] [2024-06-03 20:20:38,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:38,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:20:38,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:38,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:20:38,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:20:38,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:20:38,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 550 transitions, 8428 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 20:20:38,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:38,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:20:38,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:41,203 INFO L124 PetriNetUnfolderBase]: 5792/9022 cut-off events. [2024-06-03 20:20:41,203 INFO L125 PetriNetUnfolderBase]: For 965115/965115 co-relation queries the response was YES. [2024-06-03 20:20:41,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73959 conditions, 9022 events. 5792/9022 cut-off events. For 965115/965115 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 56018 event pairs, 1174 based on Foata normal form. 12/9034 useless extension candidates. Maximal degree in co-relation 73753. Up to 8255 conditions per place. [2024-06-03 20:20:41,340 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 498 selfloop transitions, 91 changer transitions 0/592 dead transitions. [2024-06-03 20:20:41,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 592 transitions, 9838 flow [2024-06-03 20:20:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:20:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:20:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-03 20:20:41,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-03 20:20:41,341 INFO L175 Difference]: Start difference. First operand has 433 places, 550 transitions, 8428 flow. Second operand 10 states and 167 transitions. [2024-06-03 20:20:41,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 592 transitions, 9838 flow [2024-06-03 20:20:46,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 592 transitions, 9568 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-03 20:20:46,133 INFO L231 Difference]: Finished difference. Result has 434 places, 551 transitions, 8422 flow [2024-06-03 20:20:46,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8160, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8422, PETRI_PLACES=434, PETRI_TRANSITIONS=551} [2024-06-03 20:20:46,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-03 20:20:46,133 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 551 transitions, 8422 flow [2024-06-03 20:20:46,133 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 20:20:46,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:46,133 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 20:20:46,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:20:46,134 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:46,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:46,134 INFO L85 PathProgramCache]: Analyzing trace with hash -169474499, now seen corresponding path program 13 times [2024-06-03 20:20:46,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:46,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457471328] [2024-06-03 20:20:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:46,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:47,771 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 20:20:47,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:47,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457471328] [2024-06-03 20:20:47,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457471328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:47,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:47,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:20:47,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715236211] [2024-06-03 20:20:47,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:47,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:20:47,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:47,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:20:47,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:20:47,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:20:47,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 551 transitions, 8422 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 20:20:47,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:47,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:20:47,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:50,486 INFO L124 PetriNetUnfolderBase]: 5833/9093 cut-off events. [2024-06-03 20:20:50,486 INFO L125 PetriNetUnfolderBase]: For 965420/965420 co-relation queries the response was YES. [2024-06-03 20:20:50,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74150 conditions, 9093 events. 5833/9093 cut-off events. For 965420/965420 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 56633 event pairs, 1167 based on Foata normal form. 12/9105 useless extension candidates. Maximal degree in co-relation 73943. Up to 8208 conditions per place. [2024-06-03 20:20:50,634 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 489 selfloop transitions, 101 changer transitions 0/593 dead transitions. [2024-06-03 20:20:50,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 593 transitions, 9834 flow [2024-06-03 20:20:50,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:20:50,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:20:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-03 20:20:50,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-03 20:20:50,636 INFO L175 Difference]: Start difference. First operand has 434 places, 551 transitions, 8422 flow. Second operand 10 states and 167 transitions. [2024-06-03 20:20:50,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 593 transitions, 9834 flow [2024-06-03 20:20:53,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 593 transitions, 9588 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-03 20:20:53,690 INFO L231 Difference]: Finished difference. Result has 436 places, 552 transitions, 8460 flow [2024-06-03 20:20:53,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8178, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8460, PETRI_PLACES=436, PETRI_TRANSITIONS=552} [2024-06-03 20:20:53,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-03 20:20:53,690 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 552 transitions, 8460 flow [2024-06-03 20:20:53,690 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 20:20:53,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:53,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:53,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:20:53,690 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 20:20:53,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:53,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1111948926, now seen corresponding path program 6 times [2024-06-03 20:20:53,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:53,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961094475] [2024-06-03 20:20:53,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:53,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:55,175 INFO 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 20:20:55,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:55,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961094475] [2024-06-03 20:20:55,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961094475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:55,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:55,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:55,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936810437] [2024-06-03 20:20:55,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:55,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:55,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:55,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:55,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:55,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:20:55,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 552 transitions, 8460 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 20:20:55,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:55,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:20:55,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:57,788 INFO L124 PetriNetUnfolderBase]: 5895/9179 cut-off events. [2024-06-03 20:20:57,788 INFO L125 PetriNetUnfolderBase]: For 952370/952370 co-relation queries the response was YES. [2024-06-03 20:20:57,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74727 conditions, 9179 events. 5895/9179 cut-off events. For 952370/952370 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 57082 event pairs, 1289 based on Foata normal form. 4/9183 useless extension candidates. Maximal degree in co-relation 74519. Up to 8680 conditions per place. [2024-06-03 20:20:57,945 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 471 selfloop transitions, 114 changer transitions 0/588 dead transitions. [2024-06-03 20:20:57,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 588 transitions, 10235 flow [2024-06-03 20:20:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:20:57,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 20:20:57,946 INFO L175 Difference]: Start difference. First operand has 436 places, 552 transitions, 8460 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:20:57,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 588 transitions, 10235 flow [2024-06-03 20:21:02,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 588 transitions, 9967 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-03 20:21:02,466 INFO L231 Difference]: Finished difference. Result has 437 places, 561 transitions, 8606 flow [2024-06-03 20:21:02,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8196, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8606, PETRI_PLACES=437, PETRI_TRANSITIONS=561} [2024-06-03 20:21:02,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-03 20:21:02,466 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 561 transitions, 8606 flow [2024-06-03 20:21:02,467 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 20:21:02,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:02,467 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 20:21:02,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:21:02,467 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 20:21:02,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:02,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1111937766, now seen corresponding path program 7 times [2024-06-03 20:21:02,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:02,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438966591] [2024-06-03 20:21:02,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:02,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:03,973 INFO 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 20:21:03,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:03,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438966591] [2024-06-03 20:21:03,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438966591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:03,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:03,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:03,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144396228] [2024-06-03 20:21:03,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:03,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:03,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:03,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:03,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:04,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:21:04,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 561 transitions, 8606 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 20:21:04,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:04,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:21:04,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:06,624 INFO L124 PetriNetUnfolderBase]: 5883/9163 cut-off events. [2024-06-03 20:21:06,624 INFO L125 PetriNetUnfolderBase]: For 927657/927657 co-relation queries the response was YES. [2024-06-03 20:21:06,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73921 conditions, 9163 events. 5883/9163 cut-off events. For 927657/927657 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 57022 event pairs, 1287 based on Foata normal form. 4/9167 useless extension candidates. Maximal degree in co-relation 73711. Up to 8672 conditions per place. [2024-06-03 20:21:06,775 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 477 selfloop transitions, 108 changer transitions 0/588 dead transitions. [2024-06-03 20:21:06,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 588 transitions, 10065 flow [2024-06-03 20:21:06,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:21:06,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 20:21:06,776 INFO L175 Difference]: Start difference. First operand has 437 places, 561 transitions, 8606 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:21:06,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 588 transitions, 10065 flow [2024-06-03 20:21:12,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 588 transitions, 9887 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 20:21:12,446 INFO L231 Difference]: Finished difference. Result has 441 places, 561 transitions, 8656 flow [2024-06-03 20:21:12,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8430, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8656, PETRI_PLACES=441, PETRI_TRANSITIONS=561} [2024-06-03 20:21:12,447 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-03 20:21:12,447 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 561 transitions, 8656 flow [2024-06-03 20:21:12,447 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 20:21:12,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:12,447 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 20:21:12,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:21:12,447 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 20:21:12,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:12,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1198674970, now seen corresponding path program 4 times [2024-06-03 20:21:12,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:12,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880729516] [2024-06-03 20:21:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:12,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:13,189 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 20:21:13,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:13,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880729516] [2024-06-03 20:21:13,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880729516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:13,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:13,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:13,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513013063] [2024-06-03 20:21:13,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:13,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:13,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:13,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:13,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:13,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:21:13,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 561 transitions, 8656 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 20:21:13,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:13,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:21:13,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:15,702 INFO L124 PetriNetUnfolderBase]: 5925/9225 cut-off events. [2024-06-03 20:21:15,702 INFO L125 PetriNetUnfolderBase]: For 941482/941486 co-relation queries the response was YES. [2024-06-03 20:21:15,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75020 conditions, 9225 events. 5925/9225 cut-off events. For 941482/941486 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 57475 event pairs, 1767 based on Foata normal form. 6/9231 useless extension candidates. Maximal degree in co-relation 74810. Up to 8940 conditions per place. [2024-06-03 20:21:15,856 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 514 selfloop transitions, 78 changer transitions 0/595 dead transitions. [2024-06-03 20:21:15,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 595 transitions, 10444 flow [2024-06-03 20:21:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:15,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:15,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:21:15,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 20:21:15,857 INFO L175 Difference]: Start difference. First operand has 441 places, 561 transitions, 8656 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:21:15,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 595 transitions, 10444 flow [2024-06-03 20:21:20,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 595 transitions, 10186 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 20:21:20,945 INFO L231 Difference]: Finished difference. Result has 442 places, 570 transitions, 8910 flow [2024-06-03 20:21:20,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8400, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8910, PETRI_PLACES=442, PETRI_TRANSITIONS=570} [2024-06-03 20:21:20,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-03 20:21:20,946 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 570 transitions, 8910 flow [2024-06-03 20:21:20,946 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 20:21:20,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:20,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:20,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:21:20,946 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 20:21:20,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:20,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1250446696, now seen corresponding path program 4 times [2024-06-03 20:21:20,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:20,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630901264] [2024-06-03 20:21:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:20,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:21,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:21,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630901264] [2024-06-03 20:21:21,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630901264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:21,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:21,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:21,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484413818] [2024-06-03 20:21:21,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:21,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:21,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:21,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:21,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:22,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:21:22,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 570 transitions, 8910 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 20:21:22,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:22,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:21:22,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:24,659 INFO L124 PetriNetUnfolderBase]: 5977/9298 cut-off events. [2024-06-03 20:21:24,660 INFO L125 PetriNetUnfolderBase]: For 972382/972394 co-relation queries the response was YES. [2024-06-03 20:21:24,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76279 conditions, 9298 events. 5977/9298 cut-off events. For 972382/972394 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 57936 event pairs, 1772 based on Foata normal form. 16/9314 useless extension candidates. Maximal degree in co-relation 76069. Up to 8957 conditions per place. [2024-06-03 20:21:24,828 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 507 selfloop transitions, 91 changer transitions 0/601 dead transitions. [2024-06-03 20:21:24,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 601 transitions, 10564 flow [2024-06-03 20:21:24,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:24,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 20:21:24,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-03 20:21:24,829 INFO L175 Difference]: Start difference. First operand has 442 places, 570 transitions, 8910 flow. Second operand 8 states and 137 transitions. [2024-06-03 20:21:24,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 601 transitions, 10564 flow [2024-06-03 20:21:29,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 601 transitions, 10361 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-03 20:21:29,069 INFO L231 Difference]: Finished difference. Result has 445 places, 576 transitions, 9071 flow [2024-06-03 20:21:29,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8713, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9071, PETRI_PLACES=445, PETRI_TRANSITIONS=576} [2024-06-03 20:21:29,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-03 20:21:29,070 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 576 transitions, 9071 flow [2024-06-03 20:21:29,070 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 20:21:29,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:29,070 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 20:21:29,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:21:29,070 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 20:21:29,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:29,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1027977190, now seen corresponding path program 5 times [2024-06-03 20:21:29,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:29,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917657672] [2024-06-03 20:21:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:29,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:29,931 INFO 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 20:21:29,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:29,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917657672] [2024-06-03 20:21:29,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917657672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:29,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:29,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:29,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305482328] [2024-06-03 20:21:29,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:29,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:29,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:29,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:29,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:21:29,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 576 transitions, 9071 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 20:21:29,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:29,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:21:29,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:32,506 INFO L124 PetriNetUnfolderBase]: 6027/9369 cut-off events. [2024-06-03 20:21:32,506 INFO L125 PetriNetUnfolderBase]: For 955624/955628 co-relation queries the response was YES. [2024-06-03 20:21:32,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77040 conditions, 9369 events. 6027/9369 cut-off events. For 955624/955628 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 58422 event pairs, 1809 based on Foata normal form. 6/9375 useless extension candidates. Maximal degree in co-relation 76829. Up to 9165 conditions per place. [2024-06-03 20:21:32,674 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 544 selfloop transitions, 68 changer transitions 0/615 dead transitions. [2024-06-03 20:21:32,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 615 transitions, 10872 flow [2024-06-03 20:21:32,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-03 20:21:32,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-03 20:21:32,675 INFO L175 Difference]: Start difference. First operand has 445 places, 576 transitions, 9071 flow. Second operand 9 states and 137 transitions. [2024-06-03 20:21:32,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 615 transitions, 10872 flow [2024-06-03 20:21:37,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 615 transitions, 10693 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-03 20:21:37,252 INFO L231 Difference]: Finished difference. Result has 453 places, 595 transitions, 9559 flow [2024-06-03 20:21:37,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8904, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9559, PETRI_PLACES=453, PETRI_TRANSITIONS=595} [2024-06-03 20:21:37,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-03 20:21:37,253 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 595 transitions, 9559 flow [2024-06-03 20:21:37,253 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 20:21:37,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:37,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:37,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:21:37,253 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 20:21:37,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:37,254 INFO L85 PathProgramCache]: Analyzing trace with hash 644126414, now seen corresponding path program 5 times [2024-06-03 20:21:37,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:37,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466664568] [2024-06-03 20:21:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:37,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:38,211 INFO 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 20:21:38,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:38,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466664568] [2024-06-03 20:21:38,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466664568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:38,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:38,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:38,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455479015] [2024-06-03 20:21:38,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:38,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:38,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:38,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:38,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:38,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:21:38,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 595 transitions, 9559 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 20:21:38,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:38,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:21:38,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:40,923 INFO L124 PetriNetUnfolderBase]: 6047/9398 cut-off events. [2024-06-03 20:21:40,923 INFO L125 PetriNetUnfolderBase]: For 962036/962040 co-relation queries the response was YES. [2024-06-03 20:21:41,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77178 conditions, 9398 events. 6047/9398 cut-off events. For 962036/962040 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 58503 event pairs, 1808 based on Foata normal form. 8/9406 useless extension candidates. Maximal degree in co-relation 76963. Up to 9154 conditions per place. [2024-06-03 20:21:41,105 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 537 selfloop transitions, 80 changer transitions 0/620 dead transitions. [2024-06-03 20:21:41,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 620 transitions, 10975 flow [2024-06-03 20:21:41,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:21:41,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 20:21:41,106 INFO L175 Difference]: Start difference. First operand has 453 places, 595 transitions, 9559 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:21:41,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 620 transitions, 10975 flow [2024-06-03 20:21:45,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 620 transitions, 10813 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 20:21:45,264 INFO L231 Difference]: Finished difference. Result has 457 places, 600 transitions, 9679 flow [2024-06-03 20:21:45,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9397, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9679, PETRI_PLACES=457, PETRI_TRANSITIONS=600} [2024-06-03 20:21:45,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-03 20:21:45,265 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 600 transitions, 9679 flow [2024-06-03 20:21:45,265 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 20:21:45,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:45,265 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 20:21:45,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:21:45,265 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 20:21:45,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:45,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1205108710, now seen corresponding path program 6 times [2024-06-03 20:21:45,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:45,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778912707] [2024-06-03 20:21:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:45,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:46,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:46,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778912707] [2024-06-03 20:21:46,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778912707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:46,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:46,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:46,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15658079] [2024-06-03 20:21:46,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:46,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:46,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:46,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:46,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:46,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:21:46,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 600 transitions, 9679 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 20:21:46,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:46,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:21:46,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:48,776 INFO L124 PetriNetUnfolderBase]: 6067/9425 cut-off events. [2024-06-03 20:21:48,776 INFO L125 PetriNetUnfolderBase]: For 972475/972479 co-relation queries the response was YES. [2024-06-03 20:21:48,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77971 conditions, 9425 events. 6067/9425 cut-off events. For 972475/972479 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 58774 event pairs, 1818 based on Foata normal form. 6/9431 useless extension candidates. Maximal degree in co-relation 77754. Up to 9257 conditions per place. [2024-06-03 20:21:48,935 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 557 selfloop transitions, 63 changer transitions 0/623 dead transitions. [2024-06-03 20:21:48,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 623 transitions, 11152 flow [2024-06-03 20:21:48,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 20:21:48,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-03 20:21:48,937 INFO L175 Difference]: Start difference. First operand has 457 places, 600 transitions, 9679 flow. Second operand 8 states and 123 transitions. [2024-06-03 20:21:48,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 623 transitions, 11152 flow [2024-06-03 20:21:53,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 623 transitions, 11020 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-03 20:21:53,032 INFO L231 Difference]: Finished difference. Result has 464 places, 606 transitions, 9871 flow [2024-06-03 20:21:53,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9547, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9871, PETRI_PLACES=464, PETRI_TRANSITIONS=606} [2024-06-03 20:21:53,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-03 20:21:53,032 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 606 transitions, 9871 flow [2024-06-03 20:21:53,032 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 20:21:53,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:53,032 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 20:21:53,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:21:53,033 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 20:21:53,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:53,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1205108896, now seen corresponding path program 6 times [2024-06-03 20:21:53,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:53,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98527337] [2024-06-03 20:21:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:53,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:53,968 INFO 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 20:21:53,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:53,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98527337] [2024-06-03 20:21:53,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98527337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:53,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:53,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:53,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988202449] [2024-06-03 20:21:53,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:53,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:53,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:53,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:53,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:54,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:21:54,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 606 transitions, 9871 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 20:21:54,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:54,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:21:54,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:56,660 INFO L124 PetriNetUnfolderBase]: 6107/9482 cut-off events. [2024-06-03 20:21:56,660 INFO L125 PetriNetUnfolderBase]: For 1002231/1002235 co-relation queries the response was YES. [2024-06-03 20:21:56,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78441 conditions, 9482 events. 6107/9482 cut-off events. For 1002231/1002235 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 59053 event pairs, 1809 based on Foata normal form. 8/9490 useless extension candidates. Maximal degree in co-relation 78221. Up to 9188 conditions per place. [2024-06-03 20:21:56,828 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 542 selfloop transitions, 98 changer transitions 0/643 dead transitions. [2024-06-03 20:21:56,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 643 transitions, 11434 flow [2024-06-03 20:21:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 20:21:56,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 20:21:56,829 INFO L175 Difference]: Start difference. First operand has 464 places, 606 transitions, 9871 flow. Second operand 8 states and 132 transitions. [2024-06-03 20:21:56,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 643 transitions, 11434 flow [2024-06-03 20:22:01,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 643 transitions, 11245 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-03 20:22:01,591 INFO L231 Difference]: Finished difference. Result has 470 places, 623 transitions, 10173 flow [2024-06-03 20:22:01,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9682, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10173, PETRI_PLACES=470, PETRI_TRANSITIONS=623} [2024-06-03 20:22:01,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-03 20:22:01,592 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 623 transitions, 10173 flow [2024-06-03 20:22:01,592 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 20:22:01,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:01,592 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 20:22:01,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:22:01,592 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 20:22:01,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:01,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1726551880, now seen corresponding path program 2 times [2024-06-03 20:22:01,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:01,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094102244] [2024-06-03 20:22:01,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:01,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:03,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:03,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094102244] [2024-06-03 20:22:03,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094102244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:03,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:03,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:22:03,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417070807] [2024-06-03 20:22:03,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:03,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:22:03,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:03,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:22:03,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:22:03,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:22:03,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 623 transitions, 10173 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 20:22:03,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:03,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:22:03,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:05,797 INFO L124 PetriNetUnfolderBase]: 6123/9503 cut-off events. [2024-06-03 20:22:05,797 INFO L125 PetriNetUnfolderBase]: For 1003907/1003909 co-relation queries the response was YES. [2024-06-03 20:22:05,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79259 conditions, 9503 events. 6123/9503 cut-off events. For 1003907/1003909 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59244 event pairs, 1926 based on Foata normal form. 6/9509 useless extension candidates. Maximal degree in co-relation 79036. Up to 9260 conditions per place. [2024-06-03 20:22:06,007 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 567 selfloop transitions, 75 changer transitions 0/645 dead transitions. [2024-06-03 20:22:06,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 645 transitions, 11593 flow [2024-06-03 20:22:06,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:06,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 20:22:06,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-03 20:22:06,008 INFO L175 Difference]: Start difference. First operand has 470 places, 623 transitions, 10173 flow. Second operand 8 states and 129 transitions. [2024-06-03 20:22:06,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 645 transitions, 11593 flow [2024-06-03 20:22:09,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 645 transitions, 11458 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 20:22:09,628 INFO L231 Difference]: Finished difference. Result has 475 places, 625 transitions, 10253 flow [2024-06-03 20:22:09,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10038, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10253, PETRI_PLACES=475, PETRI_TRANSITIONS=625} [2024-06-03 20:22:09,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-03 20:22:09,629 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 625 transitions, 10253 flow [2024-06-03 20:22:09,629 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 20:22:09,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:09,629 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 20:22:09,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:22:09,629 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:09,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:09,630 INFO L85 PathProgramCache]: Analyzing trace with hash 221372615, now seen corresponding path program 14 times [2024-06-03 20:22:09,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:09,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281864392] [2024-06-03 20:22:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:09,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:11,704 INFO 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 20:22:11,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:11,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281864392] [2024-06-03 20:22:11,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281864392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:11,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:11,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:22:11,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425402487] [2024-06-03 20:22:11,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:11,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:22:11,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:11,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:22:11,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:22:11,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:22:11,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 625 transitions, 10253 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:11,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:11,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:22:11,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:14,436 INFO L124 PetriNetUnfolderBase]: 6164/9577 cut-off events. [2024-06-03 20:22:14,436 INFO L125 PetriNetUnfolderBase]: For 1037617/1037619 co-relation queries the response was YES. [2024-06-03 20:22:14,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79853 conditions, 9577 events. 6164/9577 cut-off events. For 1037617/1037619 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 59779 event pairs, 1214 based on Foata normal form. 14/9591 useless extension candidates. Maximal degree in co-relation 79629. Up to 8326 conditions per place. [2024-06-03 20:22:14,617 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 527 selfloop transitions, 138 changer transitions 0/668 dead transitions. [2024-06-03 20:22:14,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 668 transitions, 11829 flow [2024-06-03 20:22:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:22:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:22:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-03 20:22:14,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-03 20:22:14,618 INFO L175 Difference]: Start difference. First operand has 475 places, 625 transitions, 10253 flow. Second operand 10 states and 173 transitions. [2024-06-03 20:22:14,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 668 transitions, 11829 flow [2024-06-03 20:22:18,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 668 transitions, 11646 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:18,505 INFO L231 Difference]: Finished difference. Result has 479 places, 626 transitions, 10424 flow [2024-06-03 20:22:18,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10070, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10424, PETRI_PLACES=479, PETRI_TRANSITIONS=626} [2024-06-03 20:22:18,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-03 20:22:18,505 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 626 transitions, 10424 flow [2024-06-03 20:22:18,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:18,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:18,505 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 20:22:18,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:22:18,506 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 20:22:18,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:18,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2053317444, now seen corresponding path program 7 times [2024-06-03 20:22:18,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:18,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872538689] [2024-06-03 20:22:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:18,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:19,259 INFO 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 20:22:19,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:19,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872538689] [2024-06-03 20:22:19,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872538689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:19,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:19,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:19,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128735251] [2024-06-03 20:22:19,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:19,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:19,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:19,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:19,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:19,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:22:19,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 626 transitions, 10424 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 20:22:19,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:19,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:22:19,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:21,803 INFO L124 PetriNetUnfolderBase]: 6238/9681 cut-off events. [2024-06-03 20:22:21,803 INFO L125 PetriNetUnfolderBase]: For 1068874/1068878 co-relation queries the response was YES. [2024-06-03 20:22:21,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82650 conditions, 9681 events. 6238/9681 cut-off events. For 1068874/1068878 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 60602 event pairs, 1820 based on Foata normal form. 6/9687 useless extension candidates. Maximal degree in co-relation 82425. Up to 8883 conditions per place. [2024-06-03 20:22:21,968 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 537 selfloop transitions, 141 changer transitions 0/681 dead transitions. [2024-06-03 20:22:21,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 681 transitions, 13204 flow [2024-06-03 20:22:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:21,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:22:21,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 20:22:21,969 INFO L175 Difference]: Start difference. First operand has 479 places, 626 transitions, 10424 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:22:21,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 681 transitions, 13204 flow [2024-06-03 20:22:25,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 681 transitions, 12868 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-03 20:22:25,976 INFO L231 Difference]: Finished difference. Result has 480 places, 653 transitions, 11209 flow [2024-06-03 20:22:25,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10088, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11209, PETRI_PLACES=480, PETRI_TRANSITIONS=653} [2024-06-03 20:22:25,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-03 20:22:25,976 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 653 transitions, 11209 flow [2024-06-03 20:22:25,976 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 20:22:25,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:25,977 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 20:22:25,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:22:25,977 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:25,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:25,977 INFO L85 PathProgramCache]: Analyzing trace with hash 50670185, now seen corresponding path program 15 times [2024-06-03 20:22:25,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:25,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246574478] [2024-06-03 20:22:25,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:25,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:27,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:27,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246574478] [2024-06-03 20:22:27,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246574478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:27,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:27,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:22:27,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979659103] [2024-06-03 20:22:27,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:27,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:22:27,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:27,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:22:27,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:22:28,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:22:28,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 653 transitions, 11209 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 20:22:28,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:28,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:22:28,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:31,093 INFO L124 PetriNetUnfolderBase]: 6279/9750 cut-off events. [2024-06-03 20:22:31,093 INFO L125 PetriNetUnfolderBase]: For 1129629/1129631 co-relation queries the response was YES. [2024-06-03 20:22:31,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83938 conditions, 9750 events. 6279/9750 cut-off events. For 1129629/1129631 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 60888 event pairs, 1246 based on Foata normal form. 14/9764 useless extension candidates. Maximal degree in co-relation 83711. Up to 8697 conditions per place. [2024-06-03 20:22:31,284 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 592 selfloop transitions, 113 changer transitions 0/708 dead transitions. [2024-06-03 20:22:31,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 708 transitions, 12929 flow [2024-06-03 20:22:31,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:22:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:22:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-03 20:22:31,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-03 20:22:31,285 INFO L175 Difference]: Start difference. First operand has 480 places, 653 transitions, 11209 flow. Second operand 12 states and 202 transitions. [2024-06-03 20:22:31,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 708 transitions, 12929 flow [2024-06-03 20:22:36,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 708 transitions, 12725 flow, removed 84 selfloop flow, removed 2 redundant places. [2024-06-03 20:22:36,516 INFO L231 Difference]: Finished difference. Result has 490 places, 654 transitions, 11311 flow [2024-06-03 20:22:36,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11005, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11311, PETRI_PLACES=490, PETRI_TRANSITIONS=654} [2024-06-03 20:22:36,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-03 20:22:36,516 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 654 transitions, 11311 flow [2024-06-03 20:22:36,516 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 20:22:36,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:36,516 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 20:22:36,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:22:36,517 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 20:22:36,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:36,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1979974632, now seen corresponding path program 7 times [2024-06-03 20:22:36,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:36,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021725284] [2024-06-03 20:22:36,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:36,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:37,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:37,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021725284] [2024-06-03 20:22:37,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021725284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:37,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:37,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:37,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001251904] [2024-06-03 20:22:37,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:37,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:37,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:37,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:37,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:37,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:22:37,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 654 transitions, 11311 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 20:22:37,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:37,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:22:37,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:40,588 INFO L124 PetriNetUnfolderBase]: 6341/9838 cut-off events. [2024-06-03 20:22:40,588 INFO L125 PetriNetUnfolderBase]: For 1145957/1145961 co-relation queries the response was YES. [2024-06-03 20:22:40,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85693 conditions, 9838 events. 6341/9838 cut-off events. For 1145957/1145961 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 61668 event pairs, 1838 based on Foata normal form. 8/9846 useless extension candidates. Maximal degree in co-relation 85464. Up to 9174 conditions per place. [2024-06-03 20:22:40,772 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 544 selfloop transitions, 145 changer transitions 0/692 dead transitions. [2024-06-03 20:22:40,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 692 transitions, 13515 flow [2024-06-03 20:22:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:40,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 20:22:40,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-03 20:22:40,773 INFO L175 Difference]: Start difference. First operand has 490 places, 654 transitions, 11311 flow. Second operand 8 states and 137 transitions. [2024-06-03 20:22:40,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 692 transitions, 13515 flow [2024-06-03 20:22:45,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 692 transitions, 13227 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-03 20:22:45,815 INFO L231 Difference]: Finished difference. Result has 489 places, 666 transitions, 11631 flow [2024-06-03 20:22:45,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11023, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11631, PETRI_PLACES=489, PETRI_TRANSITIONS=666} [2024-06-03 20:22:45,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-03 20:22:45,815 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 666 transitions, 11631 flow [2024-06-03 20:22:45,815 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 20:22:45,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:45,815 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 20:22:45,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:22:45,815 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:45,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:45,816 INFO L85 PathProgramCache]: Analyzing trace with hash 225405797, now seen corresponding path program 16 times [2024-06-03 20:22:45,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:45,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030449155] [2024-06-03 20:22:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:45,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:47,779 INFO 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 20:22:47,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:47,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030449155] [2024-06-03 20:22:47,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030449155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:47,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:47,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-03 20:22:47,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323447765] [2024-06-03 20:22:47,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:47,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-03 20:22:47,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:47,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-03 20:22:47,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-03 20:22:47,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:22:47,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 666 transitions, 11631 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 20:22:47,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:47,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:22:47,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:51,048 INFO L124 PetriNetUnfolderBase]: 6382/9907 cut-off events. [2024-06-03 20:22:51,048 INFO L125 PetriNetUnfolderBase]: For 1196552/1196554 co-relation queries the response was YES. [2024-06-03 20:22:51,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86396 conditions, 9907 events. 6382/9907 cut-off events. For 1196552/1196554 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 62058 event pairs, 1252 based on Foata normal form. 14/9921 useless extension candidates. Maximal degree in co-relation 86165. Up to 8966 conditions per place. [2024-06-03 20:22:51,199 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 594 selfloop transitions, 110 changer transitions 0/707 dead transitions. [2024-06-03 20:22:51,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 707 transitions, 13279 flow [2024-06-03 20:22:51,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:22:51,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:22:51,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-03 20:22:51,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 20:22:51,200 INFO L175 Difference]: Start difference. First operand has 489 places, 666 transitions, 11631 flow. Second operand 10 states and 168 transitions. [2024-06-03 20:22:51,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 707 transitions, 13279 flow [2024-06-03 20:22:56,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 707 transitions, 13114 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-03 20:22:56,234 INFO L231 Difference]: Finished difference. Result has 497 places, 667 transitions, 11768 flow [2024-06-03 20:22:56,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11466, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11768, PETRI_PLACES=497, PETRI_TRANSITIONS=667} [2024-06-03 20:22:56,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-03 20:22:56,234 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 667 transitions, 11768 flow [2024-06-03 20:22:56,234 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 20:22:56,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:56,234 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 20:22:56,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:22:56,235 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 20:22:56,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:56,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2060467284, now seen corresponding path program 8 times [2024-06-03 20:22:56,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:56,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261955089] [2024-06-03 20:22:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:56,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:56,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:56,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261955089] [2024-06-03 20:22:56,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261955089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:56,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:56,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:56,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739321173] [2024-06-03 20:22:56,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:56,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:56,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:57,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:22:57,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 667 transitions, 11768 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 20:22:57,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:57,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:22:57,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:59,791 INFO L124 PetriNetUnfolderBase]: 6402/9937 cut-off events. [2024-06-03 20:22:59,791 INFO L125 PetriNetUnfolderBase]: For 1193765/1193769 co-relation queries the response was YES. [2024-06-03 20:22:59,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87276 conditions, 9937 events. 6402/9937 cut-off events. For 1193765/1193769 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 62561 event pairs, 1809 based on Foata normal form. 8/9945 useless extension candidates. Maximal degree in co-relation 87043. Up to 9119 conditions per place. [2024-06-03 20:22:59,987 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 536 selfloop transitions, 159 changer transitions 0/698 dead transitions. [2024-06-03 20:22:59,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 698 transitions, 13810 flow [2024-06-03 20:22:59,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:59,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:59,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:22:59,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 20:22:59,989 INFO L175 Difference]: Start difference. First operand has 497 places, 667 transitions, 11768 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:22:59,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 698 transitions, 13810 flow [2024-06-03 20:23:05,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 698 transitions, 13498 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-03 20:23:05,093 INFO L231 Difference]: Finished difference. Result has 496 places, 671 transitions, 11897 flow [2024-06-03 20:23:05,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11456, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11897, PETRI_PLACES=496, PETRI_TRANSITIONS=671} [2024-06-03 20:23:05,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-03 20:23:05,094 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 671 transitions, 11897 flow [2024-06-03 20:23:05,094 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 20:23:05,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:05,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:05,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:23:05,094 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:05,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:05,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1696566441, now seen corresponding path program 17 times [2024-06-03 20:23:05,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:05,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689373201] [2024-06-03 20:23:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:05,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:06,800 INFO 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 20:23:06,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:06,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689373201] [2024-06-03 20:23:06,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689373201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:06,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:06,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:23:06,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983297230] [2024-06-03 20:23:06,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:06,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:23:06,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:06,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:23:06,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:23:06,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:23:06,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 671 transitions, 11897 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:06,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:06,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:23:06,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:09,674 INFO L124 PetriNetUnfolderBase]: 6382/9903 cut-off events. [2024-06-03 20:23:09,674 INFO L125 PetriNetUnfolderBase]: For 1185178/1185180 co-relation queries the response was YES. [2024-06-03 20:23:09,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85685 conditions, 9903 events. 6382/9903 cut-off events. For 1185178/1185180 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 61954 event pairs, 1212 based on Foata normal form. 14/9917 useless extension candidates. Maximal degree in co-relation 85452. Up to 8532 conditions per place. [2024-06-03 20:23:09,857 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 564 selfloop transitions, 148 changer transitions 0/715 dead transitions. [2024-06-03 20:23:09,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 715 transitions, 13381 flow [2024-06-03 20:23:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:23:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:23:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-03 20:23:09,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-03 20:23:09,858 INFO L175 Difference]: Start difference. First operand has 496 places, 671 transitions, 11897 flow. Second operand 10 states and 174 transitions. [2024-06-03 20:23:09,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 715 transitions, 13381 flow [2024-06-03 20:23:14,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 715 transitions, 12998 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-03 20:23:14,942 INFO L231 Difference]: Finished difference. Result has 500 places, 670 transitions, 11662 flow [2024-06-03 20:23:14,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11362, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11662, PETRI_PLACES=500, PETRI_TRANSITIONS=670} [2024-06-03 20:23:14,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 457 predicate places. [2024-06-03 20:23:14,942 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 670 transitions, 11662 flow [2024-06-03 20:23:14,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:14,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:14,943 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 20:23:14,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:23:14,943 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 20:23:14,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:14,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1984791292, now seen corresponding path program 9 times [2024-06-03 20:23:14,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:14,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417561052] [2024-06-03 20:23:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:14,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:15,670 INFO 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 20:23:15,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:15,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417561052] [2024-06-03 20:23:15,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417561052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:15,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:15,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:15,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188761615] [2024-06-03 20:23:15,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:15,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:15,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:15,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:15,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:15,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:23:15,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 670 transitions, 11662 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 20:23:15,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:15,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:23:15,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:18,396 INFO L124 PetriNetUnfolderBase]: 6426/9966 cut-off events. [2024-06-03 20:23:18,397 INFO L125 PetriNetUnfolderBase]: For 1176520/1176524 co-relation queries the response was YES. [2024-06-03 20:23:18,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86507 conditions, 9966 events. 6426/9966 cut-off events. For 1176520/1176524 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 62676 event pairs, 1805 based on Foata normal form. 8/9974 useless extension candidates. Maximal degree in co-relation 86273. Up to 9124 conditions per place. [2024-06-03 20:23:18,592 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 534 selfloop transitions, 165 changer transitions 0/702 dead transitions. [2024-06-03 20:23:18,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 702 transitions, 13831 flow [2024-06-03 20:23:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 20:23:18,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-03 20:23:18,593 INFO L175 Difference]: Start difference. First operand has 500 places, 670 transitions, 11662 flow. Second operand 8 states and 134 transitions. [2024-06-03 20:23:18,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 702 transitions, 13831 flow [2024-06-03 20:23:24,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 702 transitions, 13270 flow, removed 37 selfloop flow, removed 11 redundant places. [2024-06-03 20:23:24,345 INFO L231 Difference]: Finished difference. Result has 497 places, 677 transitions, 11635 flow [2024-06-03 20:23:24,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11101, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11635, PETRI_PLACES=497, PETRI_TRANSITIONS=677} [2024-06-03 20:23:24,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-03 20:23:24,345 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 677 transitions, 11635 flow [2024-06-03 20:23:24,345 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 20:23:24,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:24,346 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 20:23:24,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:23:24,346 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 20:23:24,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2053437414, now seen corresponding path program 10 times [2024-06-03 20:23:24,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:24,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910958692] [2024-06-03 20:23:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:24,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:25,115 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 20:23:25,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:25,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910958692] [2024-06-03 20:23:25,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910958692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:25,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:25,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:25,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404517205] [2024-06-03 20:23:25,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:25,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:25,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:25,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:23:25,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 677 transitions, 11635 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 20:23:25,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:25,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:23:25,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:28,345 INFO L124 PetriNetUnfolderBase]: 6436/9980 cut-off events. [2024-06-03 20:23:28,345 INFO L125 PetriNetUnfolderBase]: For 1177912/1177916 co-relation queries the response was YES. [2024-06-03 20:23:28,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85010 conditions, 9980 events. 6436/9980 cut-off events. For 1177912/1177916 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 62734 event pairs, 1820 based on Foata normal form. 6/9986 useless extension candidates. Maximal degree in co-relation 84778. Up to 9655 conditions per place. [2024-06-03 20:23:28,506 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 602 selfloop transitions, 95 changer transitions 0/700 dead transitions. [2024-06-03 20:23:28,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 700 transitions, 13220 flow [2024-06-03 20:23:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 20:23:28,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-03 20:23:28,507 INFO L175 Difference]: Start difference. First operand has 497 places, 677 transitions, 11635 flow. Second operand 8 states and 127 transitions. [2024-06-03 20:23:28,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 700 transitions, 13220 flow [2024-06-03 20:23:34,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 700 transitions, 12890 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-03 20:23:34,828 INFO L231 Difference]: Finished difference. Result has 501 places, 680 transitions, 11600 flow [2024-06-03 20:23:34,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11307, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11600, PETRI_PLACES=501, PETRI_TRANSITIONS=680} [2024-06-03 20:23:34,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-03 20:23:34,828 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 680 transitions, 11600 flow [2024-06-03 20:23:34,829 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 20:23:34,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:34,829 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 20:23:34,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:23:34,829 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 20:23:34,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:34,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1857744922, now seen corresponding path program 11 times [2024-06-03 20:23:34,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:34,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864286259] [2024-06-03 20:23:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:34,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:35,590 INFO 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 20:23:35,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:35,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864286259] [2024-06-03 20:23:35,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864286259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:35,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:35,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:35,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684576282] [2024-06-03 20:23:35,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:35,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:35,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:35,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:35,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:35,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:23:35,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 680 transitions, 11600 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 20:23:35,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:35,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:23:35,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:38,526 INFO L124 PetriNetUnfolderBase]: 6446/9994 cut-off events. [2024-06-03 20:23:38,526 INFO L125 PetriNetUnfolderBase]: For 1156557/1156561 co-relation queries the response was YES. [2024-06-03 20:23:38,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84467 conditions, 9994 events. 6446/9994 cut-off events. For 1156557/1156561 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 62816 event pairs, 1823 based on Foata normal form. 6/10000 useless extension candidates. Maximal degree in co-relation 84234. Up to 9575 conditions per place. [2024-06-03 20:23:38,706 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 581 selfloop transitions, 122 changer transitions 0/706 dead transitions. [2024-06-03 20:23:38,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 706 transitions, 13593 flow [2024-06-03 20:23:38,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:23:38,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:23:38,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-03 20:23:38,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-03 20:23:38,707 INFO L175 Difference]: Start difference. First operand has 501 places, 680 transitions, 11600 flow. Second operand 10 states and 153 transitions. [2024-06-03 20:23:38,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 706 transitions, 13593 flow [2024-06-03 20:23:44,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 706 transitions, 13335 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-03 20:23:44,789 INFO L231 Difference]: Finished difference. Result has 505 places, 683 transitions, 11677 flow [2024-06-03 20:23:44,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11342, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11677, PETRI_PLACES=505, PETRI_TRANSITIONS=683} [2024-06-03 20:23:44,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-03 20:23:44,790 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 683 transitions, 11677 flow [2024-06-03 20:23:44,790 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 20:23:44,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:44,790 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 20:23:44,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:23:44,790 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 20:23:44,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:44,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1857299266, now seen corresponding path program 8 times [2024-06-03 20:23:44,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:44,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593078405] [2024-06-03 20:23:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:44,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:45,773 INFO 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 20:23:45,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:45,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593078405] [2024-06-03 20:23:45,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593078405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:45,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:45,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:45,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337551172] [2024-06-03 20:23:45,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:45,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:45,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:45,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:45,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:45,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:23:45,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 683 transitions, 11677 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 20:23:45,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:45,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:23:45,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:48,580 INFO L124 PetriNetUnfolderBase]: 6471/10037 cut-off events. [2024-06-03 20:23:48,580 INFO L125 PetriNetUnfolderBase]: For 1190593/1190593 co-relation queries the response was YES. [2024-06-03 20:23:48,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85031 conditions, 10037 events. 6471/10037 cut-off events. For 1190593/1190593 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 63145 event pairs, 2653 based on Foata normal form. 4/10041 useless extension candidates. Maximal degree in co-relation 84797. Up to 9930 conditions per place. [2024-06-03 20:23:48,764 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 675 selfloop transitions, 31 changer transitions 0/709 dead transitions. [2024-06-03 20:23:48,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 709 transitions, 13322 flow [2024-06-03 20:23:48,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:23:48,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:23:48,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-03 20:23:48,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-03 20:23:48,765 INFO L175 Difference]: Start difference. First operand has 505 places, 683 transitions, 11677 flow. Second operand 9 states and 130 transitions. [2024-06-03 20:23:48,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 709 transitions, 13322 flow [2024-06-03 20:23:54,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 709 transitions, 13041 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-03 20:23:54,015 INFO L231 Difference]: Finished difference. Result has 511 places, 692 transitions, 11659 flow [2024-06-03 20:23:54,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11396, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11659, PETRI_PLACES=511, PETRI_TRANSITIONS=692} [2024-06-03 20:23:54,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 468 predicate places. [2024-06-03 20:23:54,015 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 692 transitions, 11659 flow [2024-06-03 20:23:54,015 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 20:23:54,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:54,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:54,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:23:54,016 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 20:23:54,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:54,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1857478012, now seen corresponding path program 12 times [2024-06-03 20:23:54,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:54,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239467938] [2024-06-03 20:23:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:54,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:54,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:54,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239467938] [2024-06-03 20:23:54,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239467938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:54,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:54,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:54,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237185123] [2024-06-03 20:23:54,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:54,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:54,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:54,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:54,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:54,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:23:54,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 692 transitions, 11659 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 20:23:54,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:54,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:23:54,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:57,759 INFO L124 PetriNetUnfolderBase]: 6457/10010 cut-off events. [2024-06-03 20:23:57,759 INFO L125 PetriNetUnfolderBase]: For 1186450/1186454 co-relation queries the response was YES. [2024-06-03 20:23:57,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84531 conditions, 10010 events. 6457/10010 cut-off events. For 1186450/1186454 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 62862 event pairs, 1814 based on Foata normal form. 8/10018 useless extension candidates. Maximal degree in co-relation 84294. Up to 9600 conditions per place. [2024-06-03 20:23:57,966 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 587 selfloop transitions, 120 changer transitions 0/710 dead transitions. [2024-06-03 20:23:57,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 710 transitions, 13365 flow [2024-06-03 20:23:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:23:57,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 20:23:57,967 INFO L175 Difference]: Start difference. First operand has 511 places, 692 transitions, 11659 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:23:57,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 710 transitions, 13365 flow [2024-06-03 20:24:02,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 710 transitions, 13145 flow, removed 93 selfloop flow, removed 4 redundant places. [2024-06-03 20:24:02,604 INFO L231 Difference]: Finished difference. Result has 515 places, 692 transitions, 11689 flow [2024-06-03 20:24:02,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11439, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11689, PETRI_PLACES=515, PETRI_TRANSITIONS=692} [2024-06-03 20:24:02,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 472 predicate places. [2024-06-03 20:24:02,605 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 692 transitions, 11689 flow [2024-06-03 20:24:02,605 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 20:24:02,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:02,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:02,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:24:02,605 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 20:24:02,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:02,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1857744736, now seen corresponding path program 9 times [2024-06-03 20:24:02,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:02,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605634488] [2024-06-03 20:24:02,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:02,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:03,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:03,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605634488] [2024-06-03 20:24:03,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605634488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:03,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:03,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:03,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574672197] [2024-06-03 20:24:03,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:03,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:03,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:03,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:03,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:24:03,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 692 transitions, 11689 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 20:24:03,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:03,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:24:03,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:06,424 INFO L124 PetriNetUnfolderBase]: 6493/10060 cut-off events. [2024-06-03 20:24:06,424 INFO L125 PetriNetUnfolderBase]: For 1219734/1219738 co-relation queries the response was YES. [2024-06-03 20:24:06,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85467 conditions, 10060 events. 6493/10060 cut-off events. For 1219734/1219738 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 63229 event pairs, 1830 based on Foata normal form. 8/10068 useless extension candidates. Maximal degree in co-relation 85229. Up to 9362 conditions per place. [2024-06-03 20:24:06,618 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 560 selfloop transitions, 159 changer transitions 0/722 dead transitions. [2024-06-03 20:24:06,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 722 transitions, 13847 flow [2024-06-03 20:24:06,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:24:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:24:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:24:06,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-03 20:24:06,619 INFO L175 Difference]: Start difference. First operand has 515 places, 692 transitions, 11689 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:24:06,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 722 transitions, 13847 flow [2024-06-03 20:24:12,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 722 transitions, 13607 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:24:12,471 INFO L231 Difference]: Finished difference. Result has 516 places, 698 transitions, 11939 flow [2024-06-03 20:24:12,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11449, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11939, PETRI_PLACES=516, PETRI_TRANSITIONS=698} [2024-06-03 20:24:12,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 473 predicate places. [2024-06-03 20:24:12,472 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 698 transitions, 11939 flow [2024-06-03 20:24:12,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:12,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:12,472 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 20:24:12,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:24:12,473 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 20:24:12,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:12,473 INFO L85 PathProgramCache]: Analyzing trace with hash -428512036, now seen corresponding path program 10 times [2024-06-03 20:24:12,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:12,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22320647] [2024-06-03 20:24:12,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:12,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:13,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:13,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22320647] [2024-06-03 20:24:13,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22320647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:13,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:13,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:13,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703925560] [2024-06-03 20:24:13,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:13,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:13,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:13,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:13,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:13,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:24:13,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 698 transitions, 11939 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 20:24:13,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:13,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:24:13,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:16,199 INFO L124 PetriNetUnfolderBase]: 6505/10075 cut-off events. [2024-06-03 20:24:16,200 INFO L125 PetriNetUnfolderBase]: For 1237680/1237684 co-relation queries the response was YES. [2024-06-03 20:24:16,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86033 conditions, 10075 events. 6505/10075 cut-off events. For 1237680/1237684 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 63225 event pairs, 1893 based on Foata normal form. 8/10083 useless extension candidates. Maximal degree in co-relation 85794. Up to 9807 conditions per place. [2024-06-03 20:24:16,390 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 619 selfloop transitions, 97 changer transitions 0/719 dead transitions. [2024-06-03 20:24:16,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 719 transitions, 13554 flow [2024-06-03 20:24:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:24:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:24:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 20:24:16,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-03 20:24:16,391 INFO L175 Difference]: Start difference. First operand has 516 places, 698 transitions, 11939 flow. Second operand 7 states and 116 transitions. [2024-06-03 20:24:16,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 719 transitions, 13554 flow [2024-06-03 20:24:22,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 719 transitions, 13298 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-03 20:24:22,515 INFO L231 Difference]: Finished difference. Result has 519 places, 702 transitions, 12011 flow [2024-06-03 20:24:22,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11686, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12011, PETRI_PLACES=519, PETRI_TRANSITIONS=702} [2024-06-03 20:24:22,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-03 20:24:22,515 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 702 transitions, 12011 flow [2024-06-03 20:24:22,515 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 20:24:22,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:22,515 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 20:24:22,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:24:22,516 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 20:24:22,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:22,516 INFO L85 PathProgramCache]: Analyzing trace with hash -428749372, now seen corresponding path program 13 times [2024-06-03 20:24:22,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:22,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100020782] [2024-06-03 20:24:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:22,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:23,256 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 20:24:23,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:23,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100020782] [2024-06-03 20:24:23,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100020782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:23,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:23,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:23,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922194799] [2024-06-03 20:24:23,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:23,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:23,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:23,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:23,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:23,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:24:23,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 702 transitions, 12011 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 20:24:23,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:23,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:24:23,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:26,141 INFO L124 PetriNetUnfolderBase]: 6499/10066 cut-off events. [2024-06-03 20:24:26,141 INFO L125 PetriNetUnfolderBase]: For 1235287/1235291 co-relation queries the response was YES. [2024-06-03 20:24:26,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85581 conditions, 10066 events. 6499/10066 cut-off events. For 1235287/1235291 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 63144 event pairs, 1889 based on Foata normal form. 6/10072 useless extension candidates. Maximal degree in co-relation 85341. Up to 9922 conditions per place. [2024-06-03 20:24:26,320 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 659 selfloop transitions, 52 changer transitions 0/714 dead transitions. [2024-06-03 20:24:26,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 714 transitions, 13483 flow [2024-06-03 20:24:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:24:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:24:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-06-03 20:24:26,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.335978835978836 [2024-06-03 20:24:26,321 INFO L175 Difference]: Start difference. First operand has 519 places, 702 transitions, 12011 flow. Second operand 9 states and 127 transitions. [2024-06-03 20:24:26,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 714 transitions, 13483 flow [2024-06-03 20:24:31,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 714 transitions, 13229 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-03 20:24:31,305 INFO L231 Difference]: Finished difference. Result has 525 places, 702 transitions, 11867 flow [2024-06-03 20:24:31,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11757, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11867, PETRI_PLACES=525, PETRI_TRANSITIONS=702} [2024-06-03 20:24:31,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 482 predicate places. [2024-06-03 20:24:31,305 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 702 transitions, 11867 flow [2024-06-03 20:24:31,305 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 20:24:31,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:31,305 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 20:24:31,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:24:31,306 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 20:24:31,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:31,306 INFO L85 PathProgramCache]: Analyzing trace with hash 862188164, now seen corresponding path program 14 times [2024-06-03 20:24:31,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:31,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225457734] [2024-06-03 20:24:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:31,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:32,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:32,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225457734] [2024-06-03 20:24:32,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225457734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:32,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:32,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:32,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026252089] [2024-06-03 20:24:32,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:32,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:32,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:32,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:32,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:32,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:24:32,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 702 transitions, 11867 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 20:24:32,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:32,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:24:32,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:34,890 INFO L124 PetriNetUnfolderBase]: 6487/10052 cut-off events. [2024-06-03 20:24:34,890 INFO L125 PetriNetUnfolderBase]: For 1243849/1243853 co-relation queries the response was YES. [2024-06-03 20:24:35,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84778 conditions, 10052 events. 6487/10052 cut-off events. For 1243849/1243853 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 63216 event pairs, 1797 based on Foata normal form. 8/10060 useless extension candidates. Maximal degree in co-relation 84537. Up to 9466 conditions per place. [2024-06-03 20:24:35,089 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 602 selfloop transitions, 121 changer transitions 0/726 dead transitions. [2024-06-03 20:24:35,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 726 transitions, 13693 flow [2024-06-03 20:24:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:24:35,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:24:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:24:35,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-03 20:24:35,090 INFO L175 Difference]: Start difference. First operand has 525 places, 702 transitions, 11867 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:24:35,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 726 transitions, 13693 flow [2024-06-03 20:24:40,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 726 transitions, 13402 flow, removed 69 selfloop flow, removed 10 redundant places. [2024-06-03 20:24:40,413 INFO L231 Difference]: Finished difference. Result has 522 places, 702 transitions, 11834 flow [2024-06-03 20:24:40,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11576, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11834, PETRI_PLACES=522, PETRI_TRANSITIONS=702} [2024-06-03 20:24:40,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 479 predicate places. [2024-06-03 20:24:40,413 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 702 transitions, 11834 flow [2024-06-03 20:24:40,413 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 20:24:40,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:40,413 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 20:24:40,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:24:40,414 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 20:24:40,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:40,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1519682834, now seen corresponding path program 11 times [2024-06-03 20:24:40,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:40,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853615439] [2024-06-03 20:24:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:40,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:41,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:41,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853615439] [2024-06-03 20:24:41,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853615439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:41,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:41,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:41,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541450807] [2024-06-03 20:24:41,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:41,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:41,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:41,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:41,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:41,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:24:41,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 702 transitions, 11834 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 20:24:41,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:41,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:24:41,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:44,189 INFO L124 PetriNetUnfolderBase]: 6507/10079 cut-off events. [2024-06-03 20:24:44,189 INFO L125 PetriNetUnfolderBase]: For 1266737/1266741 co-relation queries the response was YES. [2024-06-03 20:24:44,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85150 conditions, 10079 events. 6507/10079 cut-off events. For 1266737/1266741 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 63253 event pairs, 1845 based on Foata normal form. 8/10087 useless extension candidates. Maximal degree in co-relation 84913. Up to 9661 conditions per place. [2024-06-03 20:24:44,378 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 604 selfloop transitions, 121 changer transitions 0/728 dead transitions. [2024-06-03 20:24:44,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 728 transitions, 13701 flow [2024-06-03 20:24:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:24:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:24:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:24:44,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-03 20:24:44,379 INFO L175 Difference]: Start difference. First operand has 522 places, 702 transitions, 11834 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:24:44,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 728 transitions, 13701 flow [2024-06-03 20:24:50,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 728 transitions, 13384 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 20:24:50,094 INFO L231 Difference]: Finished difference. Result has 522 places, 705 transitions, 11870 flow [2024-06-03 20:24:50,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11517, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11870, PETRI_PLACES=522, PETRI_TRANSITIONS=705} [2024-06-03 20:24:50,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 479 predicate places. [2024-06-03 20:24:50,095 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 705 transitions, 11870 flow [2024-06-03 20:24:50,095 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 20:24:50,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:50,095 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 20:24:50,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:24:50,096 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 20:24:50,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:50,096 INFO L85 PathProgramCache]: Analyzing trace with hash -215631316, now seen corresponding path program 12 times [2024-06-03 20:24:50,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:50,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039622117] [2024-06-03 20:24:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:50,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:50,966 INFO 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 20:24:50,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:50,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039622117] [2024-06-03 20:24:50,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039622117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:50,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:50,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:50,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364323927] [2024-06-03 20:24:50,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:50,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:50,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:50,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:50,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:51,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:24:51,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 705 transitions, 11870 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 20:24:51,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:51,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:24:51,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:53,808 INFO L124 PetriNetUnfolderBase]: 6495/10068 cut-off events. [2024-06-03 20:24:53,808 INFO L125 PetriNetUnfolderBase]: For 1264017/1264019 co-relation queries the response was YES. [2024-06-03 20:24:53,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84690 conditions, 10068 events. 6495/10068 cut-off events. For 1264017/1264019 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 63461 event pairs, 2479 based on Foata normal form. 6/10074 useless extension candidates. Maximal degree in co-relation 84453. Up to 9797 conditions per place. [2024-06-03 20:24:53,994 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 638 selfloop transitions, 89 changer transitions 0/730 dead transitions. [2024-06-03 20:24:53,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 730 transitions, 13436 flow [2024-06-03 20:24:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:24:53,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:24:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 20:24:53,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-03 20:24:53,995 INFO L175 Difference]: Start difference. First operand has 522 places, 705 transitions, 11870 flow. Second operand 7 states and 129 transitions. [2024-06-03 20:24:53,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 730 transitions, 13436 flow [2024-06-03 20:25:00,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 730 transitions, 13143 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-03 20:25:00,043 INFO L231 Difference]: Finished difference. Result has 524 places, 705 transitions, 11795 flow [2024-06-03 20:25:00,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11577, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11795, PETRI_PLACES=524, PETRI_TRANSITIONS=705} [2024-06-03 20:25:00,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 481 predicate places. [2024-06-03 20:25:00,044 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 705 transitions, 11795 flow [2024-06-03 20:25:00,044 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 20:25:00,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:00,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:00,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:25:00,044 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 20:25:00,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:00,045 INFO L85 PathProgramCache]: Analyzing trace with hash 6250874, now seen corresponding path program 13 times [2024-06-03 20:25:00,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:00,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558412366] [2024-06-03 20:25:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:00,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:00,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:00,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558412366] [2024-06-03 20:25:00,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558412366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:00,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:00,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:25:00,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828016366] [2024-06-03 20:25:00,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:00,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:25:00,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:00,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:25:00,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:25:01,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:25:01,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 705 transitions, 11795 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 20:25:01,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:01,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:25:01,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:03,784 INFO L124 PetriNetUnfolderBase]: 6531/10112 cut-off events. [2024-06-03 20:25:03,785 INFO L125 PetriNetUnfolderBase]: For 1275985/1275987 co-relation queries the response was YES. [2024-06-03 20:25:03,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85210 conditions, 10112 events. 6531/10112 cut-off events. For 1275985/1275987 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 63683 event pairs, 1924 based on Foata normal form. 6/10118 useless extension candidates. Maximal degree in co-relation 84973. Up to 9712 conditions per place. [2024-06-03 20:25:03,964 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 614 selfloop transitions, 120 changer transitions 0/737 dead transitions. [2024-06-03 20:25:03,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 737 transitions, 13787 flow [2024-06-03 20:25:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:25:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:25:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 20:25:03,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-03 20:25:03,965 INFO L175 Difference]: Start difference. First operand has 524 places, 705 transitions, 11795 flow. Second operand 7 states and 129 transitions. [2024-06-03 20:25:03,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 737 transitions, 13787 flow [2024-06-03 20:25:10,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 737 transitions, 13521 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 20:25:10,225 INFO L231 Difference]: Finished difference. Result has 526 places, 711 transitions, 12064 flow [2024-06-03 20:25:10,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11551, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12064, PETRI_PLACES=526, PETRI_TRANSITIONS=711} [2024-06-03 20:25:10,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 483 predicate places. [2024-06-03 20:25:10,226 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 711 transitions, 12064 flow [2024-06-03 20:25:10,226 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 20:25:10,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:10,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:10,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:25:10,226 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 20:25:10,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:10,227 INFO L85 PathProgramCache]: Analyzing trace with hash -221650276, now seen corresponding path program 14 times [2024-06-03 20:25:10,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:10,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724232000] [2024-06-03 20:25:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:10,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:11,134 INFO 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 20:25:11,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:11,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724232000] [2024-06-03 20:25:11,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724232000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:11,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:11,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:25:11,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500064615] [2024-06-03 20:25:11,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:11,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:25:11,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:11,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:25:11,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:25:11,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:25:11,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 711 transitions, 12064 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 20:25:11,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:11,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:25:11,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:13,987 INFO L124 PetriNetUnfolderBase]: 6551/10151 cut-off events. [2024-06-03 20:25:13,987 INFO L125 PetriNetUnfolderBase]: For 1239312/1239312 co-relation queries the response was YES. [2024-06-03 20:25:14,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85063 conditions, 10151 events. 6551/10151 cut-off events. For 1239312/1239312 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 63988 event pairs, 2663 based on Foata normal form. 4/10155 useless extension candidates. Maximal degree in co-relation 84824. Up to 10037 conditions per place. [2024-06-03 20:25:14,164 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 698 selfloop transitions, 28 changer transitions 0/729 dead transitions. [2024-06-03 20:25:14,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 729 transitions, 13669 flow [2024-06-03 20:25:14,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:25:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:25:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-03 20:25:14,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-03 20:25:14,165 INFO L175 Difference]: Start difference. First operand has 526 places, 711 transitions, 12064 flow. Second operand 7 states and 108 transitions. [2024-06-03 20:25:14,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 729 transitions, 13669 flow [2024-06-03 20:25:20,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 729 transitions, 13460 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 20:25:20,316 INFO L231 Difference]: Finished difference. Result has 528 places, 714 transitions, 12008 flow [2024-06-03 20:25:20,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11855, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12008, PETRI_PLACES=528, PETRI_TRANSITIONS=714} [2024-06-03 20:25:20,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 485 predicate places. [2024-06-03 20:25:20,316 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 714 transitions, 12008 flow [2024-06-03 20:25:20,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:20,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:20,317 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 20:25:20,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:25:20,317 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 20:25:20,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:20,317 INFO L85 PathProgramCache]: Analyzing trace with hash -222095932, now seen corresponding path program 15 times [2024-06-03 20:25:20,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:20,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717945501] [2024-06-03 20:25:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:20,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:21,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:21,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717945501] [2024-06-03 20:25:21,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717945501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:21,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:21,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:25:21,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099578894] [2024-06-03 20:25:21,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:21,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:25:21,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:21,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:25:21,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:25:21,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:25:21,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 714 transitions, 12008 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 20:25:21,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:21,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:25:21,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:23,971 INFO L124 PetriNetUnfolderBase]: 6545/10135 cut-off events. [2024-06-03 20:25:23,971 INFO L125 PetriNetUnfolderBase]: For 1211770/1211774 co-relation queries the response was YES. [2024-06-03 20:25:24,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84375 conditions, 10135 events. 6545/10135 cut-off events. For 1211770/1211774 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 63816 event pairs, 1835 based on Foata normal form. 6/10141 useless extension candidates. Maximal degree in co-relation 84136. Up to 9553 conditions per place. [2024-06-03 20:25:24,155 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 622 selfloop transitions, 113 changer transitions 0/738 dead transitions. [2024-06-03 20:25:24,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 738 transitions, 13858 flow [2024-06-03 20:25:24,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:25:24,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:25:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:25:24,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-03 20:25:24,156 INFO L175 Difference]: Start difference. First operand has 528 places, 714 transitions, 12008 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:25:24,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 738 transitions, 13858 flow [2024-06-03 20:25:30,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 738 transitions, 13560 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-03 20:25:30,400 INFO L231 Difference]: Finished difference. Result has 530 places, 714 transitions, 11948 flow [2024-06-03 20:25:30,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11712, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11948, PETRI_PLACES=530, PETRI_TRANSITIONS=714} [2024-06-03 20:25:30,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 487 predicate places. [2024-06-03 20:25:30,400 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 714 transitions, 11948 flow [2024-06-03 20:25:30,400 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 20:25:30,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:30,400 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 20:25:30,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:25:30,401 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 20:25:30,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash -225068976, now seen corresponding path program 15 times [2024-06-03 20:25:30,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:30,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700338758] [2024-06-03 20:25:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:30,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:31,262 INFO 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 20:25:31,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:31,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700338758] [2024-06-03 20:25:31,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700338758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:31,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:31,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:25:31,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784628730] [2024-06-03 20:25:31,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:31,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:25:31,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:31,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:25:31,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:25:31,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:25:31,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 714 transitions, 11948 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 20:25:31,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:31,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:25:31,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:34,077 INFO L124 PetriNetUnfolderBase]: 6533/10119 cut-off events. [2024-06-03 20:25:34,077 INFO L125 PetriNetUnfolderBase]: For 1198533/1198537 co-relation queries the response was YES. [2024-06-03 20:25:34,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83645 conditions, 10119 events. 6533/10119 cut-off events. For 1198533/1198537 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 63694 event pairs, 1844 based on Foata normal form. 8/10127 useless extension candidates. Maximal degree in co-relation 83406. Up to 9390 conditions per place. [2024-06-03 20:25:34,261 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 560 selfloop transitions, 174 changer transitions 0/737 dead transitions. [2024-06-03 20:25:34,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 737 transitions, 13758 flow [2024-06-03 20:25:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:25:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:25:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:25:34,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-03 20:25:34,262 INFO L175 Difference]: Start difference. First operand has 530 places, 714 transitions, 11948 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:25:34,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 737 transitions, 13758 flow [2024-06-03 20:25:40,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 737 transitions, 13562 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 20:25:40,944 INFO L231 Difference]: Finished difference. Result has 532 places, 714 transitions, 12114 flow [2024-06-03 20:25:40,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11752, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12114, PETRI_PLACES=532, PETRI_TRANSITIONS=714} [2024-06-03 20:25:40,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 489 predicate places. [2024-06-03 20:25:40,944 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 714 transitions, 12114 flow [2024-06-03 20:25:40,944 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 20:25:40,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:40,945 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 20:25:40,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:25:40,945 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 20:25:40,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:40,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2139504098, now seen corresponding path program 8 times [2024-06-03 20:25:40,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:40,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892979224] [2024-06-03 20:25:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:40,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:42,204 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 20:25:42,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:42,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892979224] [2024-06-03 20:25:42,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892979224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:42,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:42,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:25:42,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139243016] [2024-06-03 20:25:42,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:42,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:25:42,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:42,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:25:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:25:42,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:25:42,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 714 transitions, 12114 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 20:25:42,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:42,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:25:42,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:45,165 INFO L124 PetriNetUnfolderBase]: 6553/10148 cut-off events. [2024-06-03 20:25:45,165 INFO L125 PetriNetUnfolderBase]: For 1221460/1221462 co-relation queries the response was YES. [2024-06-03 20:25:45,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84227 conditions, 10148 events. 6553/10148 cut-off events. For 1221460/1221462 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 63920 event pairs, 1769 based on Foata normal form. 6/10154 useless extension candidates. Maximal degree in co-relation 83988. Up to 9624 conditions per place. [2024-06-03 20:25:45,349 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 618 selfloop transitions, 121 changer transitions 0/742 dead transitions. [2024-06-03 20:25:45,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 742 transitions, 13963 flow [2024-06-03 20:25:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:25:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:25:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 20:25:45,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:25:45,350 INFO L175 Difference]: Start difference. First operand has 532 places, 714 transitions, 12114 flow. Second operand 7 states and 126 transitions. [2024-06-03 20:25:45,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 742 transitions, 13963 flow [2024-06-03 20:25:51,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 742 transitions, 13589 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 20:25:51,410 INFO L231 Difference]: Finished difference. Result has 532 places, 717 transitions, 12067 flow [2024-06-03 20:25:51,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11744, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12067, PETRI_PLACES=532, PETRI_TRANSITIONS=717} [2024-06-03 20:25:51,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 489 predicate places. [2024-06-03 20:25:51,410 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 717 transitions, 12067 flow [2024-06-03 20:25:51,410 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 20:25:51,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:51,410 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 20:25:51,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:25:51,411 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 20:25:51,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:51,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2139515258, now seen corresponding path program 9 times [2024-06-03 20:25:51,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:51,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343317011] [2024-06-03 20:25:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:51,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:52,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:52,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343317011] [2024-06-03 20:25:52,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343317011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:52,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:52,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:25:52,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473068969] [2024-06-03 20:25:52,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:52,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:25:52,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:25:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:25:52,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:25:52,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 717 transitions, 12067 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 20:25:52,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:52,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:25:52,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:55,980 INFO L124 PetriNetUnfolderBase]: 6573/10168 cut-off events. [2024-06-03 20:25:55,981 INFO L125 PetriNetUnfolderBase]: For 1199278/1199278 co-relation queries the response was YES. [2024-06-03 20:25:56,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84040 conditions, 10168 events. 6573/10168 cut-off events. For 1199278/1199278 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 63800 event pairs, 1408 based on Foata normal form. 4/10172 useless extension candidates. Maximal degree in co-relation 83802. Up to 9640 conditions per place. [2024-06-03 20:25:56,170 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 615 selfloop transitions, 123 changer transitions 0/741 dead transitions. [2024-06-03 20:25:56,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 741 transitions, 13900 flow [2024-06-03 20:25:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:25:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:25:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 20:25:56,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-03 20:25:56,171 INFO L175 Difference]: Start difference. First operand has 532 places, 717 transitions, 12067 flow. Second operand 7 states and 122 transitions. [2024-06-03 20:25:56,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 741 transitions, 13900 flow [2024-06-03 20:26:01,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 741 transitions, 13672 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:26:01,972 INFO L231 Difference]: Finished difference. Result has 533 places, 720 transitions, 12161 flow [2024-06-03 20:26:01,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11846, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12161, PETRI_PLACES=533, PETRI_TRANSITIONS=720} [2024-06-03 20:26:01,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 490 predicate places. [2024-06-03 20:26:01,973 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 720 transitions, 12161 flow [2024-06-03 20:26:01,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:01,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:01,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:01,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:26:01,973 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 20:26:01,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:01,974 INFO L85 PathProgramCache]: Analyzing trace with hash -428503108, now seen corresponding path program 3 times [2024-06-03 20:26:01,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:01,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563446695] [2024-06-03 20:26:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:01,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:03,101 INFO 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 20:26:03,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:03,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563446695] [2024-06-03 20:26:03,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563446695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:03,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:03,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:03,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99356121] [2024-06-03 20:26:03,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:03,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:03,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:03,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:03,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:03,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:26:03,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 720 transitions, 12161 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 20:26:03,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:03,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:26:03,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:06,221 INFO L124 PetriNetUnfolderBase]: 6589/10194 cut-off events. [2024-06-03 20:26:06,221 INFO L125 PetriNetUnfolderBase]: For 1182177/1182179 co-relation queries the response was YES. [2024-06-03 20:26:06,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83971 conditions, 10194 events. 6589/10194 cut-off events. For 1182177/1182179 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 64122 event pairs, 2008 based on Foata normal form. 6/10200 useless extension candidates. Maximal degree in co-relation 83734. Up to 9935 conditions per place. [2024-06-03 20:26:06,415 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 661 selfloop transitions, 76 changer transitions 0/740 dead transitions. [2024-06-03 20:26:06,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 740 transitions, 13765 flow [2024-06-03 20:26:06,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:26:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:26:06,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 20:26:06,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-03 20:26:06,416 INFO L175 Difference]: Start difference. First operand has 533 places, 720 transitions, 12161 flow. Second operand 7 states and 116 transitions. [2024-06-03 20:26:06,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 740 transitions, 13765 flow [2024-06-03 20:26:11,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 740 transitions, 13556 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:26:11,869 INFO L231 Difference]: Finished difference. Result has 535 places, 722 transitions, 12173 flow [2024-06-03 20:26:11,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11952, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12173, PETRI_PLACES=535, PETRI_TRANSITIONS=722} [2024-06-03 20:26:11,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 492 predicate places. [2024-06-03 20:26:11,870 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 722 transitions, 12173 flow [2024-06-03 20:26:11,870 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 20:26:11,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:11,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:11,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:26:11,871 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 20:26:11,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:11,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1680971970, now seen corresponding path program 10 times [2024-06-03 20:26:11,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:11,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940312753] [2024-06-03 20:26:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:11,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:13,196 INFO 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 20:26:13,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:13,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940312753] [2024-06-03 20:26:13,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940312753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:13,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:13,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:26:13,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325065992] [2024-06-03 20:26:13,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:13,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:26:13,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:13,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:26:13,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:26:13,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:26:13,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 722 transitions, 12173 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 20:26:13,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:13,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:26:13,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:16,035 INFO L124 PetriNetUnfolderBase]: 6577/10184 cut-off events. [2024-06-03 20:26:16,036 INFO L125 PetriNetUnfolderBase]: For 1160606/1160608 co-relation queries the response was YES. [2024-06-03 20:26:16,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83288 conditions, 10184 events. 6577/10184 cut-off events. For 1160606/1160608 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 64155 event pairs, 1775 based on Foata normal form. 6/10190 useless extension candidates. Maximal degree in co-relation 83051. Up to 9876 conditions per place. [2024-06-03 20:26:16,225 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 659 selfloop transitions, 81 changer transitions 0/743 dead transitions. [2024-06-03 20:26:16,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 743 transitions, 13741 flow [2024-06-03 20:26:16,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:26:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:26:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-03 20:26:16,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 20:26:16,226 INFO L175 Difference]: Start difference. First operand has 535 places, 722 transitions, 12173 flow. Second operand 6 states and 112 transitions. [2024-06-03 20:26:16,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 743 transitions, 13741 flow [2024-06-03 20:26:22,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 743 transitions, 13538 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-03 20:26:22,714 INFO L231 Difference]: Finished difference. Result has 536 places, 722 transitions, 12175 flow [2024-06-03 20:26:22,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11970, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12175, PETRI_PLACES=536, PETRI_TRANSITIONS=722} [2024-06-03 20:26:22,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 493 predicate places. [2024-06-03 20:26:22,715 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 722 transitions, 12175 flow [2024-06-03 20:26:22,715 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 20:26:22,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:22,715 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 20:26:22,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:26:22,715 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 20:26:22,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:22,715 INFO L85 PathProgramCache]: Analyzing trace with hash -2142118690, now seen corresponding path program 4 times [2024-06-03 20:26:22,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:22,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132099857] [2024-06-03 20:26:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:22,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:23,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:23,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132099857] [2024-06-03 20:26:23,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132099857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:23,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:23,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:23,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369084855] [2024-06-03 20:26:23,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:23,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:23,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:23,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:23,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:23,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:26:23,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 722 transitions, 12175 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 20:26:23,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:23,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:26:23,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:26,798 INFO L124 PetriNetUnfolderBase]: 6593/10202 cut-off events. [2024-06-03 20:26:26,799 INFO L125 PetriNetUnfolderBase]: For 1180356/1180358 co-relation queries the response was YES. [2024-06-03 20:26:26,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83707 conditions, 10202 events. 6593/10202 cut-off events. For 1180356/1180358 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 64196 event pairs, 2004 based on Foata normal form. 6/10208 useless extension candidates. Maximal degree in co-relation 83469. Up to 10031 conditions per place. [2024-06-03 20:26:26,980 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 686 selfloop transitions, 51 changer transitions 0/740 dead transitions. [2024-06-03 20:26:26,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 740 transitions, 13771 flow [2024-06-03 20:26:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:26:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:26:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-03 20:26:26,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-03 20:26:26,981 INFO L175 Difference]: Start difference. First operand has 536 places, 722 transitions, 12175 flow. Second operand 6 states and 103 transitions. [2024-06-03 20:26:26,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 740 transitions, 13771 flow [2024-06-03 20:26:32,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 740 transitions, 13531 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:26:32,461 INFO L231 Difference]: Finished difference. Result has 536 places, 724 transitions, 12102 flow [2024-06-03 20:26:32,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11935, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12102, PETRI_PLACES=536, PETRI_TRANSITIONS=724} [2024-06-03 20:26:32,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 493 predicate places. [2024-06-03 20:26:32,462 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 724 transitions, 12102 flow [2024-06-03 20:26:32,462 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 20:26:32,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:32,462 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 20:26:32,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:26:32,462 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 20:26:32,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:32,463 INFO L85 PathProgramCache]: Analyzing trace with hash 14830682, now seen corresponding path program 5 times [2024-06-03 20:26:32,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:32,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197192333] [2024-06-03 20:26:32,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:32,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:33,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:33,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197192333] [2024-06-03 20:26:33,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197192333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:33,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:33,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:33,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140958904] [2024-06-03 20:26:33,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:33,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:33,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:33,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:33,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:33,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:26:33,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 724 transitions, 12102 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 20:26:33,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:33,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:26:33,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:36,663 INFO L124 PetriNetUnfolderBase]: 6583/10188 cut-off events. [2024-06-03 20:26:36,663 INFO L125 PetriNetUnfolderBase]: For 1175398/1175400 co-relation queries the response was YES. [2024-06-03 20:26:36,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83315 conditions, 10188 events. 6583/10188 cut-off events. For 1175398/1175400 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 64083 event pairs, 1998 based on Foata normal form. 6/10194 useless extension candidates. Maximal degree in co-relation 83076. Up to 9995 conditions per place. [2024-06-03 20:26:36,820 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 687 selfloop transitions, 55 changer transitions 0/745 dead transitions. [2024-06-03 20:26:36,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 745 transitions, 13726 flow [2024-06-03 20:26:36,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:26:36,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:26:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 20:26:36,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-03 20:26:36,821 INFO L175 Difference]: Start difference. First operand has 536 places, 724 transitions, 12102 flow. Second operand 7 states and 116 transitions. [2024-06-03 20:26:36,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 745 transitions, 13726 flow [2024-06-03 20:26:42,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 745 transitions, 13579 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 20:26:42,159 INFO L231 Difference]: Finished difference. Result has 539 places, 726 transitions, 12132 flow [2024-06-03 20:26:42,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11955, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12132, PETRI_PLACES=539, PETRI_TRANSITIONS=726} [2024-06-03 20:26:42,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 496 predicate places. [2024-06-03 20:26:42,160 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 726 transitions, 12132 flow [2024-06-03 20:26:42,160 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 20:26:42,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:42,160 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 20:26:42,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:26:42,160 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 20:26:42,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1862054852, now seen corresponding path program 1 times [2024-06-03 20:26:42,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:42,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358094895] [2024-06-03 20:26:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:42,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:43,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:43,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358094895] [2024-06-03 20:26:43,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358094895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:43,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:43,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:43,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885609589] [2024-06-03 20:26:43,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:43,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:43,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:43,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:43,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:43,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:26:43,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 726 transitions, 12132 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 20:26:43,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:43,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:26:43,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:46,108 INFO L124 PetriNetUnfolderBase]: 6633/10266 cut-off events. [2024-06-03 20:26:46,108 INFO L125 PetriNetUnfolderBase]: For 1237940/1237944 co-relation queries the response was YES. [2024-06-03 20:26:46,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84724 conditions, 10266 events. 6633/10266 cut-off events. For 1237940/1237944 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 64693 event pairs, 1732 based on Foata normal form. 10/10276 useless extension candidates. Maximal degree in co-relation 84484. Up to 9334 conditions per place. [2024-06-03 20:26:46,285 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 577 selfloop transitions, 197 changer transitions 0/777 dead transitions. [2024-06-03 20:26:46,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 777 transitions, 14841 flow [2024-06-03 20:26:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:26:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:26:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-03 20:26:46,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-03 20:26:46,287 INFO L175 Difference]: Start difference. First operand has 539 places, 726 transitions, 12132 flow. Second operand 10 states and 164 transitions. [2024-06-03 20:26:46,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 777 transitions, 14841 flow [2024-06-03 20:26:52,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 777 transitions, 14680 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 20:26:52,450 INFO L231 Difference]: Finished difference. Result has 545 places, 744 transitions, 12846 flow [2024-06-03 20:26:52,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11971, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12846, PETRI_PLACES=545, PETRI_TRANSITIONS=744} [2024-06-03 20:26:52,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 502 predicate places. [2024-06-03 20:26:52,450 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 744 transitions, 12846 flow [2024-06-03 20:26:52,450 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 20:26:52,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:52,451 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 20:26:52,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:26:52,451 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 20:26:52,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:52,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1862051938, now seen corresponding path program 1 times [2024-06-03 20:26:52,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:52,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069084437] [2024-06-03 20:26:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:52,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:53,429 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 20:26:53,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:53,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069084437] [2024-06-03 20:26:53,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069084437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:53,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:53,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:53,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901340021] [2024-06-03 20:26:53,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:53,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:53,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:53,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:53,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:53,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:26:53,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 744 transitions, 12846 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 20:26:53,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:53,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:26:53,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:56,447 INFO L124 PetriNetUnfolderBase]: 6724/10394 cut-off events. [2024-06-03 20:26:56,447 INFO L125 PetriNetUnfolderBase]: For 1293269/1293273 co-relation queries the response was YES. [2024-06-03 20:26:56,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87650 conditions, 10394 events. 6724/10394 cut-off events. For 1293269/1293273 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 65642 event pairs, 1860 based on Foata normal form. 10/10404 useless extension candidates. Maximal degree in co-relation 87408. Up to 8778 conditions per place. [2024-06-03 20:26:56,629 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 520 selfloop transitions, 272 changer transitions 0/795 dead transitions. [2024-06-03 20:26:56,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 795 transitions, 15906 flow [2024-06-03 20:26:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:26:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:26:56,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 20:26:56,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-03 20:26:56,630 INFO L175 Difference]: Start difference. First operand has 545 places, 744 transitions, 12846 flow. Second operand 9 states and 160 transitions. [2024-06-03 20:26:56,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 795 transitions, 15906 flow [2024-06-03 20:27:02,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 795 transitions, 15667 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-03 20:27:02,838 INFO L231 Difference]: Finished difference. Result has 552 places, 761 transitions, 13705 flow [2024-06-03 20:27:02,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12611, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13705, PETRI_PLACES=552, PETRI_TRANSITIONS=761} [2024-06-03 20:27:02,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 509 predicate places. [2024-06-03 20:27:02,839 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 761 transitions, 13705 flow [2024-06-03 20:27:02,839 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 20:27:02,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:02,839 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 20:27:02,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:27:02,840 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 20:27:02,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:02,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1975555772, now seen corresponding path program 2 times [2024-06-03 20:27:02,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:02,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037923009] [2024-06-03 20:27:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:02,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:03,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:03,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037923009] [2024-06-03 20:27:03,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037923009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:03,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:03,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:03,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407301026] [2024-06-03 20:27:03,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:03,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:03,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:03,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:03,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:03,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:27:03,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 761 transitions, 13705 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 20:27:03,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:03,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:27:03,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:06,843 INFO L124 PetriNetUnfolderBase]: 6734/10410 cut-off events. [2024-06-03 20:27:06,843 INFO L125 PetriNetUnfolderBase]: For 1334988/1334992 co-relation queries the response was YES. [2024-06-03 20:27:06,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89332 conditions, 10410 events. 6734/10410 cut-off events. For 1334988/1334992 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 65767 event pairs, 1847 based on Foata normal form. 12/10422 useless extension candidates. Maximal degree in co-relation 89086. Up to 9602 conditions per place. [2024-06-03 20:27:07,034 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 593 selfloop transitions, 196 changer transitions 0/792 dead transitions. [2024-06-03 20:27:07,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 792 transitions, 15927 flow [2024-06-03 20:27:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:27:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:27:07,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:27:07,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-03 20:27:07,035 INFO L175 Difference]: Start difference. First operand has 552 places, 761 transitions, 13705 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:27:07,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 792 transitions, 15927 flow [2024-06-03 20:27:13,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 792 transitions, 15565 flow, removed 83 selfloop flow, removed 3 redundant places. [2024-06-03 20:27:13,324 INFO L231 Difference]: Finished difference. Result has 559 places, 764 transitions, 13829 flow [2024-06-03 20:27:13,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13343, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13829, PETRI_PLACES=559, PETRI_TRANSITIONS=764} [2024-06-03 20:27:13,324 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 516 predicate places. [2024-06-03 20:27:13,325 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 764 transitions, 13829 flow [2024-06-03 20:27:13,325 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 20:27:13,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:13,325 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 20:27:13,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:27:13,325 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 20:27:13,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:13,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1972759138, now seen corresponding path program 2 times [2024-06-03 20:27:13,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:13,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304294570] [2024-06-03 20:27:13,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:13,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:14,366 INFO 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 20:27:14,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:14,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304294570] [2024-06-03 20:27:14,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304294570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:14,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:14,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:14,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839152482] [2024-06-03 20:27:14,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:14,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:14,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:14,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:14,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:14,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:27:14,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 764 transitions, 13829 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 20:27:14,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:14,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:27:14,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:17,526 INFO L124 PetriNetUnfolderBase]: 6836/10552 cut-off events. [2024-06-03 20:27:17,526 INFO L125 PetriNetUnfolderBase]: For 1400436/1400440 co-relation queries the response was YES. [2024-06-03 20:27:17,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91671 conditions, 10552 events. 6836/10552 cut-off events. For 1400436/1400440 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 66613 event pairs, 1858 based on Foata normal form. 10/10562 useless extension candidates. Maximal degree in co-relation 91422. Up to 9139 conditions per place. [2024-06-03 20:27:17,725 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 549 selfloop transitions, 255 changer transitions 0/807 dead transitions. [2024-06-03 20:27:17,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 807 transitions, 16834 flow [2024-06-03 20:27:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:27:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:27:17,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:27:17,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-03 20:27:17,726 INFO L175 Difference]: Start difference. First operand has 559 places, 764 transitions, 13829 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:27:17,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 807 transitions, 16834 flow [2024-06-03 20:27:22,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 807 transitions, 16371 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-03 20:27:22,932 INFO L231 Difference]: Finished difference. Result has 560 places, 775 transitions, 14207 flow [2024-06-03 20:27:22,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13368, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14207, PETRI_PLACES=560, PETRI_TRANSITIONS=775} [2024-06-03 20:27:22,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 517 predicate places. [2024-06-03 20:27:22,932 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 775 transitions, 14207 flow [2024-06-03 20:27:22,932 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 20:27:22,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:22,932 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 20:27:22,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:27:22,932 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 20:27:22,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:22,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1972759262, now seen corresponding path program 3 times [2024-06-03 20:27:22,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:22,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028888114] [2024-06-03 20:27:22,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:22,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:23,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:23,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028888114] [2024-06-03 20:27:23,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028888114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:23,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:23,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:23,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955597746] [2024-06-03 20:27:23,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:23,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:23,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:23,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:24,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:27:24,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 775 transitions, 14207 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 20:27:24,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:24,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:27:24,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:27,284 INFO L124 PetriNetUnfolderBase]: 6893/10647 cut-off events. [2024-06-03 20:27:27,284 INFO L125 PetriNetUnfolderBase]: For 1486353/1486353 co-relation queries the response was YES. [2024-06-03 20:27:27,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92746 conditions, 10647 events. 6893/10647 cut-off events. For 1486353/1486353 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 67336 event pairs, 2732 based on Foata normal form. 14/10661 useless extension candidates. Maximal degree in co-relation 92497. Up to 10435 conditions per place. [2024-06-03 20:27:27,470 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 753 selfloop transitions, 55 changer transitions 0/811 dead transitions. [2024-06-03 20:27:27,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 811 transitions, 16237 flow [2024-06-03 20:27:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:27:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:27:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 20:27:27,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-03 20:27:27,471 INFO L175 Difference]: Start difference. First operand has 560 places, 775 transitions, 14207 flow. Second operand 9 states and 145 transitions. [2024-06-03 20:27:27,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 811 transitions, 16237 flow [2024-06-03 20:27:34,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 811 transitions, 15824 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-03 20:27:34,434 INFO L231 Difference]: Finished difference. Result has 566 places, 781 transitions, 14057 flow [2024-06-03 20:27:34,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13796, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14057, PETRI_PLACES=566, PETRI_TRANSITIONS=781} [2024-06-03 20:27:34,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 523 predicate places. [2024-06-03 20:27:34,435 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 781 transitions, 14057 flow [2024-06-03 20:27:34,435 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 20:27:34,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:34,435 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 20:27:34,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:27:34,436 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 20:27:34,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:34,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1857463318, now seen corresponding path program 3 times [2024-06-03 20:27:34,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:34,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355779564] [2024-06-03 20:27:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:34,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:35,763 INFO 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 20:27:35,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:35,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355779564] [2024-06-03 20:27:35,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355779564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:35,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:35,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:35,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464601583] [2024-06-03 20:27:35,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:35,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:35,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:35,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:35,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:35,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 20:27:35,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 781 transitions, 14057 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 20:27:35,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:35,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 20:27:35,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15