./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:27:21,206 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:27:21,272 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:27:21,277 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:27:21,278 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:27:21,301 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:27:21,301 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:27:21,302 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:27:21,302 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:27:21,305 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:27:21,305 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:27:21,306 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:27:21,306 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:27:21,307 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:27:21,308 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:27:21,308 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:27:21,308 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:27:21,308 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:27:21,308 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:27:21,309 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:27:21,309 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:27:21,309 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:27:21,309 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:27:21,310 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:27:21,310 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:27:21,310 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:27:21,310 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:27:21,310 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:27:21,311 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:27:21,311 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:27:21,312 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:27:21,312 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:27:21,312 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:27:21,312 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:27:21,313 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:27:21,313 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:27:21,313 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:27:21,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:27:21,313 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:27:21,313 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:27:21,314 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:27:21,314 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:27:21,314 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:27:21,314 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:27:21,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:27:21,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:27:21,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:27:21,539 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:27:21,540 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:27:21,540 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.yml/witness.yml [2024-06-03 19:27:21,726 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:27:21,726 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:27:21,727 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-03 19:27:22,804 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:27:22,998 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:27:22,999 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-03 19:27:23,010 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae7a5f91/2a8a8a3a379a4fa8a3e6fe17ac9ac178/FLAG76966bc7c [2024-06-03 19:27:23,020 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae7a5f91/2a8a8a3a379a4fa8a3e6fe17ac9ac178 [2024-06-03 19:27:23,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:27:23,047 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:27:23,048 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:27:23,048 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:27:23,051 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:27:23,052 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:27:21" (1/2) ... [2024-06-03 19:27:23,054 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b9b4b8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:23, skipping insertion in model container [2024-06-03 19:27:23,054 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:27:21" (1/2) ... [2024-06-03 19:27:23,055 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3bbbbefe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:23, skipping insertion in model container [2024-06-03 19:27:23,055 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:27:23" (2/2) ... [2024-06-03 19:27:23,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b9b4b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23, skipping insertion in model container [2024-06-03 19:27:23,056 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:27:23" (2/2) ... [2024-06-03 19:27:23,056 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:27:23,147 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:27:23,148 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-03 19:27:23,148 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-03 19:27:23,148 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-03 19:27:23,149 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:27:23,149 INFO L106 edCorrectnessWitness]: ghost_update [L839-L839] multithreaded = 1; [2024-06-03 19:27:23,188 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:27:23,514 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:27:23,521 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:27:23,621 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:27:23,654 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:27:23,655 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23 WrapperNode [2024-06-03 19:27:23,655 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:27:23,656 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:27:23,656 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:27:23,656 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:27:23,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23" (1/1) ... [2024-06-03 19:27:23,674 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23" (1/1) ... [2024-06-03 19:27:23,694 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-03 19:27:23,695 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:27:23,695 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:27:23,695 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:27:23,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:27:23,704 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23" (1/1) ... [2024-06-03 19:27:23,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23" (1/1) ... [2024-06-03 19:27:23,707 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23" (1/1) ... [2024-06-03 19:27:23,730 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 19:27:23,730 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23" (1/1) ... [2024-06-03 19:27:23,730 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23" (1/1) ... [2024-06-03 19:27:23,737 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23" (1/1) ... [2024-06-03 19:27:23,738 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23" (1/1) ... [2024-06-03 19:27:23,740 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23" (1/1) ... [2024-06-03 19:27:23,741 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23" (1/1) ... [2024-06-03 19:27:23,743 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:27:23,744 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:27:23,744 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:27:23,744 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:27:23,745 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23" (1/1) ... [2024-06-03 19:27:23,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:27:23,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:27:23,766 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 19:27:23,769 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 19:27:23,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:27:23,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:27:23,793 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:27:23,793 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:27:23,793 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:27:23,793 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:27:23,794 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:27:23,794 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:27:23,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:27:23,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:27:23,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:27:23,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:27:23,795 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 19:27:23,895 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:27:23,896 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:27:24,212 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:27:24,212 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:27:24,360 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:27:24,361 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:27:24,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:27:24 BoogieIcfgContainer [2024-06-03 19:27:24,361 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:27:24,363 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:27:24,363 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:27:24,365 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:27:24,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:27:21" (1/4) ... [2024-06-03 19:27:24,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c67152 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:27:24, skipping insertion in model container [2024-06-03 19:27:24,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:27:23" (2/4) ... [2024-06-03 19:27:24,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c67152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:27:24, skipping insertion in model container [2024-06-03 19:27:24,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:23" (3/4) ... [2024-06-03 19:27:24,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c67152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:27:24, skipping insertion in model container [2024-06-03 19:27:24,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:27:24" (4/4) ... [2024-06-03 19:27:24,369 INFO L112 eAbstractionObserver]: Analyzing ICFG mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-03 19:27:24,381 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:27:24,381 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:27:24,381 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:27:24,421 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:27:24,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 19:27:24,477 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-03 19:27:24,478 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:27:24,480 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 61 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 19:27:24,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 19:27:24,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-03 19:27:24,512 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:27:24,546 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;@6d9587bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:27:24,546 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:27:24,552 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:27:24,552 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-03 19:27:24,552 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:27:24,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:24,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:27:24,553 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 19:27:24,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:24,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1315925462, now seen corresponding path program 1 times [2024-06-03 19:27:24,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:24,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986751890] [2024-06-03 19:27:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:24,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:25,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:25,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986751890] [2024-06-03 19:27:25,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986751890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:25,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:25,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:27:25,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402849348] [2024-06-03 19:27:25,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:25,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:27:25,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:25,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:27:25,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:27:25,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 19:27:25,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:25,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:25,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 19:27:25,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:25,830 INFO L124 PetriNetUnfolderBase]: 1359/2100 cut-off events. [2024-06-03 19:27:25,830 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-03 19:27:25,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4216 conditions, 2100 events. 1359/2100 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10067 event pairs, 941 based on Foata normal form. 1/2058 useless extension candidates. Maximal degree in co-relation 4201. Up to 2029 conditions per place. [2024-06-03 19:27:25,847 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-03 19:27:25,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 177 flow [2024-06-03 19:27:25,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:27:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:27:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-03 19:27:25,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 19:27:25,858 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 74 transitions. [2024-06-03 19:27:25,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 177 flow [2024-06-03 19:27:25,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:27:25,863 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-03 19:27:25,864 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 19:27:25,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-03 19:27:25,867 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-03 19:27:25,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:25,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:25,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:25,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:27:25,868 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 19:27:25,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:25,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1883946295, now seen corresponding path program 1 times [2024-06-03 19:27:25,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:25,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025345926] [2024-06-03 19:27:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:25,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:26,477 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 19:27:26,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:26,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025345926] [2024-06-03 19:27:26,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025345926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:26,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:26,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:27:26,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672887061] [2024-06-03 19:27:26,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:26,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:27:26,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:26,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:27:26,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:27:26,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 19:27:26,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:26,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:26,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 19:27:26,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:26,858 INFO L124 PetriNetUnfolderBase]: 1353/2091 cut-off events. [2024-06-03 19:27:26,858 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2024-06-03 19:27:26,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4749 conditions, 2091 events. 1353/2091 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9990 event pairs, 795 based on Foata normal form. 3/2084 useless extension candidates. Maximal degree in co-relation 4734. Up to 2005 conditions per place. [2024-06-03 19:27:26,867 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 41 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-03 19:27:26,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 244 flow [2024-06-03 19:27:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:27:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:27:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-03 19:27:26,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-03 19:27:26,870 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 95 transitions. [2024-06-03 19:27:26,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 244 flow [2024-06-03 19:27:26,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:27:26,871 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-03 19:27:26,871 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-03 19:27:26,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-03 19:27:26,872 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-03 19:27:26,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:26,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:26,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:26,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:27:26,873 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 19:27:26,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:26,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2003849064, now seen corresponding path program 1 times [2024-06-03 19:27:26,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:26,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181120972] [2024-06-03 19:27:26,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:26,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:27,617 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 19:27:27,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:27,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181120972] [2024-06-03 19:27:27,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181120972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:27,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:27,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:27:27,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392985720] [2024-06-03 19:27:27,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:27,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:27:27,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:27:27,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:27:27,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:27:27,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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 19:27:27,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:27,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:27:27,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:28,032 INFO L124 PetriNetUnfolderBase]: 1641/2511 cut-off events. [2024-06-03 19:27:28,032 INFO L125 PetriNetUnfolderBase]: For 1285/1285 co-relation queries the response was YES. [2024-06-03 19:27:28,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6296 conditions, 2511 events. 1641/2511 cut-off events. For 1285/1285 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11943 event pairs, 746 based on Foata normal form. 3/2502 useless extension candidates. Maximal degree in co-relation 6279. Up to 2393 conditions per place. [2024-06-03 19:27:28,044 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 56 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-03 19:27:28,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 378 flow [2024-06-03 19:27:28,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:27:28,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:27:28,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-03 19:27:28,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-03 19:27:28,049 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-03 19:27:28,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 378 flow [2024-06-03 19:27:28,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 358 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 19:27:28,052 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-03 19:27:28,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-03 19:27:28,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-03 19:27:28,053 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-03 19:27:28,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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 19:27:28,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:28,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:28,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:27:28,054 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:28,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:28,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1989780140, now seen corresponding path program 1 times [2024-06-03 19:27:28,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:28,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054283893] [2024-06-03 19:27:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:28,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:28,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:28,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054283893] [2024-06-03 19:27:28,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054283893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:28,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:28,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:27:28,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415488296] [2024-06-03 19:27:28,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:28,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:27:28,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:28,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:27:28,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:27:28,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:27:28,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:28,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:28,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:27:28,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:29,346 INFO L124 PetriNetUnfolderBase]: 1632/2496 cut-off events. [2024-06-03 19:27:29,346 INFO L125 PetriNetUnfolderBase]: For 2539/2539 co-relation queries the response was YES. [2024-06-03 19:27:29,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6975 conditions, 2496 events. 1632/2496 cut-off events. For 2539/2539 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11804 event pairs, 582 based on Foata normal form. 6/2490 useless extension candidates. Maximal degree in co-relation 6956. Up to 2348 conditions per place. [2024-06-03 19:27:29,358 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 60 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-03 19:27:29,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 438 flow [2024-06-03 19:27:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-03 19:27:29,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-03 19:27:29,360 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 7 states and 148 transitions. [2024-06-03 19:27:29,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 438 flow [2024-06-03 19:27:29,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 410 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:27:29,363 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 217 flow [2024-06-03 19:27:29,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-03 19:27:29,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-03 19:27:29,364 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 217 flow [2024-06-03 19:27:29,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:29,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:29,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:29,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:27:29,365 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:29,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:29,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1263716854, now seen corresponding path program 1 times [2024-06-03 19:27:29,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:29,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361109892] [2024-06-03 19:27:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:29,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:29,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:29,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361109892] [2024-06-03 19:27:29,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361109892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:29,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:29,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:27:29,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099791589] [2024-06-03 19:27:29,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:29,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:27:29,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:29,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:27:29,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:27:29,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:27:29,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:29,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:29,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:27:29,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:30,384 INFO L124 PetriNetUnfolderBase]: 1627/2501 cut-off events. [2024-06-03 19:27:30,385 INFO L125 PetriNetUnfolderBase]: For 3802/3802 co-relation queries the response was YES. [2024-06-03 19:27:30,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7410 conditions, 2501 events. 1627/2501 cut-off events. For 3802/3802 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11854 event pairs, 689 based on Foata normal form. 2/2503 useless extension candidates. Maximal degree in co-relation 7390. Up to 2407 conditions per place. [2024-06-03 19:27:30,398 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-03 19:27:30,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 373 flow [2024-06-03 19:27:30,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:27:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:27:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-03 19:27:30,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-03 19:27:30,399 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 217 flow. Second operand 5 states and 92 transitions. [2024-06-03 19:27:30,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 373 flow [2024-06-03 19:27:30,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 334 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 19:27:30,406 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-03 19:27:30,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-03 19:27:30,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-03 19:27:30,410 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-03 19:27:30,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:30,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:30,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:30,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:27:30,414 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 19:27:30,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:30,415 INFO L85 PathProgramCache]: Analyzing trace with hash 557161464, now seen corresponding path program 1 times [2024-06-03 19:27:30,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:30,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095973292] [2024-06-03 19:27:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:30,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:30,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:30,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095973292] [2024-06-03 19:27:30,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095973292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:30,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:30,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:27:30,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457975935] [2024-06-03 19:27:30,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:30,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:27:30,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:30,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:27:30,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:27:31,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:31,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 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 19:27:31,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:31,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:31,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:31,553 INFO L124 PetriNetUnfolderBase]: 1883/2795 cut-off events. [2024-06-03 19:27:31,554 INFO L125 PetriNetUnfolderBase]: For 6041/6041 co-relation queries the response was YES. [2024-06-03 19:27:31,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8905 conditions, 2795 events. 1883/2795 cut-off events. For 6041/6041 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12579 event pairs, 763 based on Foata normal form. 6/2801 useless extension candidates. Maximal degree in co-relation 8883. Up to 2725 conditions per place. [2024-06-03 19:27:31,568 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2024-06-03 19:27:31,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 496 flow [2024-06-03 19:27:31,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:27:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:27:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-03 19:27:31,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-03 19:27:31,569 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 6 states and 111 transitions. [2024-06-03 19:27:31,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 496 flow [2024-06-03 19:27:31,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 474 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 19:27:31,573 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 327 flow [2024-06-03 19:27:31,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2024-06-03 19:27:31,574 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-03 19:27:31,574 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 327 flow [2024-06-03 19:27:31,574 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 19:27:31,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:31,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:31,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:27:31,575 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 19:27:31,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1044008201, now seen corresponding path program 1 times [2024-06-03 19:27:31,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:31,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993615755] [2024-06-03 19:27:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:31,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:32,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:32,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993615755] [2024-06-03 19:27:32,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993615755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:32,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:32,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:27:32,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942231366] [2024-06-03 19:27:32,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:32,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:27:32,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:32,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:27:32,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:27:32,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:27:32,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 327 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 19:27:32,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:32,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:27:32,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:32,672 INFO L124 PetriNetUnfolderBase]: 1698/2615 cut-off events. [2024-06-03 19:27:32,672 INFO L125 PetriNetUnfolderBase]: For 8055/8073 co-relation queries the response was YES. [2024-06-03 19:27:32,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9210 conditions, 2615 events. 1698/2615 cut-off events. For 8055/8073 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12503 event pairs, 669 based on Foata normal form. 6/2607 useless extension candidates. Maximal degree in co-relation 9185. Up to 2456 conditions per place. [2024-06-03 19:27:32,689 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-03 19:27:32,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 607 flow [2024-06-03 19:27:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:27:32,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:27:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-03 19:27:32,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-03 19:27:32,691 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 327 flow. Second operand 6 states and 115 transitions. [2024-06-03 19:27:32,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 607 flow [2024-06-03 19:27:32,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 591 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-03 19:27:32,697 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 405 flow [2024-06-03 19:27:32,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=405, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-03 19:27:32,698 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-03 19:27:32,698 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 405 flow [2024-06-03 19:27:32,698 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 19:27:32,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:32,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:32,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:27:32,699 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 19:27:32,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:32,699 INFO L85 PathProgramCache]: Analyzing trace with hash 130675729, now seen corresponding path program 2 times [2024-06-03 19:27:32,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:32,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451663686] [2024-06-03 19:27:32,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:32,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:33,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451663686] [2024-06-03 19:27:33,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451663686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:33,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:33,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:27:33,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324339879] [2024-06-03 19:27:33,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:33,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:27:33,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:33,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:27:33,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:27:33,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:27:33,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 405 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 19:27:33,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:33,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:27:33,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:33,798 INFO L124 PetriNetUnfolderBase]: 1693/2607 cut-off events. [2024-06-03 19:27:33,798 INFO L125 PetriNetUnfolderBase]: For 10161/10175 co-relation queries the response was YES. [2024-06-03 19:27:33,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9745 conditions, 2607 events. 1693/2607 cut-off events. For 10161/10175 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12404 event pairs, 665 based on Foata normal form. 2/2595 useless extension candidates. Maximal degree in co-relation 9717. Up to 2475 conditions per place. [2024-06-03 19:27:33,812 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-03 19:27:33,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 591 flow [2024-06-03 19:27:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:27:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:27:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 19:27:33,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:27:33,815 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 405 flow. Second operand 6 states and 108 transitions. [2024-06-03 19:27:33,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 591 flow [2024-06-03 19:27:33,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 81 transitions, 549 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-03 19:27:33,824 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 393 flow [2024-06-03 19:27:33,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-03 19:27:33,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-03 19:27:33,826 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 393 flow [2024-06-03 19:27:33,826 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 19:27:33,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:33,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:33,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:27:33,827 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 19:27:33,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:33,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1824663275, now seen corresponding path program 1 times [2024-06-03 19:27:33,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:33,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128289664] [2024-06-03 19:27:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:33,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:34,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:34,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128289664] [2024-06-03 19:27:34,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128289664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:34,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:34,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:34,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748534810] [2024-06-03 19:27:34,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:34,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:34,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:34,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:34,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:34,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:27:34,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:34,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:34,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:27:34,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:35,167 INFO L124 PetriNetUnfolderBase]: 1706/2625 cut-off events. [2024-06-03 19:27:35,167 INFO L125 PetriNetUnfolderBase]: For 11692/11706 co-relation queries the response was YES. [2024-06-03 19:27:35,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9939 conditions, 2625 events. 1706/2625 cut-off events. For 11692/11706 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12478 event pairs, 647 based on Foata normal form. 2/2612 useless extension candidates. Maximal degree in co-relation 9909. Up to 2473 conditions per place. [2024-06-03 19:27:35,181 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-03 19:27:35,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 94 transitions, 659 flow [2024-06-03 19:27:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 19:27:35,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-03 19:27:35,183 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 393 flow. Second operand 7 states and 130 transitions. [2024-06-03 19:27:35,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 94 transitions, 659 flow [2024-06-03 19:27:35,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 625 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:27:35,191 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 429 flow [2024-06-03 19:27:35,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-03 19:27:35,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-03 19:27:35,191 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 429 flow [2024-06-03 19:27:35,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:35,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:35,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:35,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:27:35,192 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 19:27:35,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:35,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1824783431, now seen corresponding path program 1 times [2024-06-03 19:27:35,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:35,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329677323] [2024-06-03 19:27:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:35,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:35,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:35,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329677323] [2024-06-03 19:27:35,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329677323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:35,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:35,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:35,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385277080] [2024-06-03 19:27:35,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:35,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:35,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:35,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:35,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:35,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:35,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 429 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 19:27:35,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:35,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:35,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:36,466 INFO L124 PetriNetUnfolderBase]: 1984/2941 cut-off events. [2024-06-03 19:27:36,466 INFO L125 PetriNetUnfolderBase]: For 16941/16941 co-relation queries the response was YES. [2024-06-03 19:27:36,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11927 conditions, 2941 events. 1984/2941 cut-off events. For 16941/16941 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13293 event pairs, 682 based on Foata normal form. 6/2947 useless extension candidates. Maximal degree in co-relation 11897. Up to 2747 conditions per place. [2024-06-03 19:27:36,478 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 87 selfloop transitions, 28 changer transitions 0/118 dead transitions. [2024-06-03 19:27:36,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 118 transitions, 937 flow [2024-06-03 19:27:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:36,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 19:27:36,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-03 19:27:36,480 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 429 flow. Second operand 7 states and 137 transitions. [2024-06-03 19:27:36,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 118 transitions, 937 flow [2024-06-03 19:27:36,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 118 transitions, 891 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 19:27:36,489 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 604 flow [2024-06-03 19:27:36,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=604, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2024-06-03 19:27:36,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-03 19:27:36,490 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 604 flow [2024-06-03 19:27:36,490 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 19:27:36,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:36,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:36,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:27:36,491 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 19:27:36,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:36,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1445364259, now seen corresponding path program 2 times [2024-06-03 19:27:36,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:36,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752303278] [2024-06-03 19:27:36,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:36,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:37,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:37,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752303278] [2024-06-03 19:27:37,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752303278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:37,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:37,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:37,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545118328] [2024-06-03 19:27:37,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:37,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:37,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:37,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:37,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:37,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:27:37,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 604 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:37,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:37,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:27:37,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:37,708 INFO L124 PetriNetUnfolderBase]: 1831/2791 cut-off events. [2024-06-03 19:27:37,709 INFO L125 PetriNetUnfolderBase]: For 19489/19521 co-relation queries the response was YES. [2024-06-03 19:27:37,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12434 conditions, 2791 events. 1831/2791 cut-off events. For 19489/19521 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13144 event pairs, 623 based on Foata normal form. 6/2772 useless extension candidates. Maximal degree in co-relation 12400. Up to 2576 conditions per place. [2024-06-03 19:27:37,725 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 26 changer transitions 0/116 dead transitions. [2024-06-03 19:27:37,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 116 transitions, 988 flow [2024-06-03 19:27:37,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:27:37,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 19:27:37,727 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 604 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:27:37,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 116 transitions, 988 flow [2024-06-03 19:27:37,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 952 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-03 19:27:37,744 INFO L231 Difference]: Finished difference. Result has 80 places, 92 transitions, 710 flow [2024-06-03 19:27:37,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=80, PETRI_TRANSITIONS=92} [2024-06-03 19:27:37,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-03 19:27:37,744 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 92 transitions, 710 flow [2024-06-03 19:27:37,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:37,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:37,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:37,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:27:37,745 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 19:27:37,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:37,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1398084339, now seen corresponding path program 2 times [2024-06-03 19:27:37,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:37,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463874019] [2024-06-03 19:27:37,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:37,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:38,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:38,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463874019] [2024-06-03 19:27:38,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463874019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:38,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:38,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:38,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700643763] [2024-06-03 19:27:38,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:38,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:38,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:38,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:38,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 92 transitions, 710 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 19:27:38,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:38,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:38,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:39,069 INFO L124 PetriNetUnfolderBase]: 2031/3007 cut-off events. [2024-06-03 19:27:39,070 INFO L125 PetriNetUnfolderBase]: For 26534/26534 co-relation queries the response was YES. [2024-06-03 19:27:39,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14278 conditions, 3007 events. 2031/3007 cut-off events. For 26534/26534 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13571 event pairs, 702 based on Foata normal form. 6/3013 useless extension candidates. Maximal degree in co-relation 14241. Up to 2931 conditions per place. [2024-06-03 19:27:39,084 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 96 selfloop transitions, 21 changer transitions 0/120 dead transitions. [2024-06-03 19:27:39,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 120 transitions, 1094 flow [2024-06-03 19:27:39,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:39,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 19:27:39,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:27:39,086 INFO L175 Difference]: Start difference. First operand has 80 places, 92 transitions, 710 flow. Second operand 7 states and 126 transitions. [2024-06-03 19:27:39,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 120 transitions, 1094 flow [2024-06-03 19:27:39,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 1042 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 19:27:39,105 INFO L231 Difference]: Finished difference. Result has 85 places, 98 transitions, 775 flow [2024-06-03 19:27:39,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=775, PETRI_PLACES=85, PETRI_TRANSITIONS=98} [2024-06-03 19:27:39,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-03 19:27:39,106 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 98 transitions, 775 flow [2024-06-03 19:27:39,106 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 19:27:39,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:39,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:39,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:27:39,107 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 19:27:39,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:39,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2001914951, now seen corresponding path program 3 times [2024-06-03 19:27:39,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:39,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351816358] [2024-06-03 19:27:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:39,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:39,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:39,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351816358] [2024-06-03 19:27:39,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351816358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:39,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:39,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:39,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816666024] [2024-06-03 19:27:39,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:39,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:39,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:39,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:39,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:39,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:39,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 98 transitions, 775 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 19:27:39,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:39,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:39,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:40,367 INFO L124 PetriNetUnfolderBase]: 2035/3013 cut-off events. [2024-06-03 19:27:40,367 INFO L125 PetriNetUnfolderBase]: For 29761/29761 co-relation queries the response was YES. [2024-06-03 19:27:40,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14738 conditions, 3013 events. 2035/3013 cut-off events. For 29761/29761 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13651 event pairs, 702 based on Foata normal form. 6/3019 useless extension candidates. Maximal degree in co-relation 14698. Up to 2877 conditions per place. [2024-06-03 19:27:40,382 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 99 selfloop transitions, 27 changer transitions 0/129 dead transitions. [2024-06-03 19:27:40,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 129 transitions, 1238 flow [2024-06-03 19:27:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 19:27:40,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-03 19:27:40,383 INFO L175 Difference]: Start difference. First operand has 85 places, 98 transitions, 775 flow. Second operand 7 states and 129 transitions. [2024-06-03 19:27:40,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 129 transitions, 1238 flow [2024-06-03 19:27:40,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 129 transitions, 1183 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 19:27:40,403 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 882 flow [2024-06-03 19:27:40,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=882, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-03 19:27:40,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-03 19:27:40,404 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 882 flow [2024-06-03 19:27:40,404 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 19:27:40,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:40,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:40,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:27:40,405 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 19:27:40,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:40,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1438935169, now seen corresponding path program 3 times [2024-06-03 19:27:40,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:40,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380654264] [2024-06-03 19:27:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:40,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:41,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:41,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380654264] [2024-06-03 19:27:41,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380654264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:41,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:41,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:41,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413231866] [2024-06-03 19:27:41,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:41,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:41,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:41,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:41,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:41,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:27:41,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 882 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:41,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:41,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:27:41,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:41,607 INFO L124 PetriNetUnfolderBase]: 1860/2835 cut-off events. [2024-06-03 19:27:41,607 INFO L125 PetriNetUnfolderBase]: For 30160/30180 co-relation queries the response was YES. [2024-06-03 19:27:41,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14108 conditions, 2835 events. 1860/2835 cut-off events. For 30160/30180 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13371 event pairs, 613 based on Foata normal form. 2/2815 useless extension candidates. Maximal degree in co-relation 14067. Up to 2672 conditions per place. [2024-06-03 19:27:41,623 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 95 selfloop transitions, 14 changer transitions 0/124 dead transitions. [2024-06-03 19:27:41,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 124 transitions, 1148 flow [2024-06-03 19:27:41,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 19:27:41,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-03 19:27:41,624 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 882 flow. Second operand 7 states and 124 transitions. [2024-06-03 19:27:41,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 124 transitions, 1148 flow [2024-06-03 19:27:41,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 124 transitions, 1077 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-03 19:27:41,650 INFO L231 Difference]: Finished difference. Result has 93 places, 105 transitions, 847 flow [2024-06-03 19:27:41,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=847, PETRI_PLACES=93, PETRI_TRANSITIONS=105} [2024-06-03 19:27:41,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-03 19:27:41,651 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 105 transitions, 847 flow [2024-06-03 19:27:41,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:41,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:41,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:41,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:27:41,652 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 19:27:41,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:41,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1438688905, now seen corresponding path program 1 times [2024-06-03 19:27:41,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:41,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204655958] [2024-06-03 19:27:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:41,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:42,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:42,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204655958] [2024-06-03 19:27:42,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204655958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:42,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:42,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:42,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929870844] [2024-06-03 19:27:42,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:42,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:42,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:42,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:42,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:42,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:42,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 105 transitions, 847 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 19:27:42,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:42,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:42,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:43,359 INFO L124 PetriNetUnfolderBase]: 2033/3011 cut-off events. [2024-06-03 19:27:43,359 INFO L125 PetriNetUnfolderBase]: For 36830/36830 co-relation queries the response was YES. [2024-06-03 19:27:43,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15416 conditions, 3011 events. 2033/3011 cut-off events. For 36830/36830 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13600 event pairs, 679 based on Foata normal form. 6/3017 useless extension candidates. Maximal degree in co-relation 15373. Up to 2915 conditions per place. [2024-06-03 19:27:43,376 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 102 selfloop transitions, 25 changer transitions 0/130 dead transitions. [2024-06-03 19:27:43,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 130 transitions, 1251 flow [2024-06-03 19:27:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 19:27:43,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-03 19:27:43,377 INFO L175 Difference]: Start difference. First operand has 93 places, 105 transitions, 847 flow. Second operand 7 states and 127 transitions. [2024-06-03 19:27:43,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 130 transitions, 1251 flow [2024-06-03 19:27:43,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 130 transitions, 1207 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:27:43,403 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 907 flow [2024-06-03 19:27:43,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=907, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-03 19:27:43,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-03 19:27:43,403 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 907 flow [2024-06-03 19:27:43,404 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 19:27:43,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:43,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:43,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:27:43,404 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:43,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:43,404 INFO L85 PathProgramCache]: Analyzing trace with hash 811864944, now seen corresponding path program 1 times [2024-06-03 19:27:43,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:43,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301373277] [2024-06-03 19:27:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:43,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:43,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:43,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301373277] [2024-06-03 19:27:43,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301373277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:43,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:43,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:27:43,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539077045] [2024-06-03 19:27:43,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:43,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:27:43,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:43,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:27:43,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:27:43,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:27:43,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 907 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:43,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:43,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:27:43,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:44,415 INFO L124 PetriNetUnfolderBase]: 1904/2881 cut-off events. [2024-06-03 19:27:44,416 INFO L125 PetriNetUnfolderBase]: For 40030/40030 co-relation queries the response was YES. [2024-06-03 19:27:44,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15333 conditions, 2881 events. 1904/2881 cut-off events. For 40030/40030 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13420 event pairs, 703 based on Foata normal form. 1/2882 useless extension candidates. Maximal degree in co-relation 15289. Up to 2769 conditions per place. [2024-06-03 19:27:44,432 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 95 selfloop transitions, 8 changer transitions 0/116 dead transitions. [2024-06-03 19:27:44,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 116 transitions, 1133 flow [2024-06-03 19:27:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:27:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:27:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-03 19:27:44,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-03 19:27:44,433 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 907 flow. Second operand 5 states and 88 transitions. [2024-06-03 19:27:44,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 116 transitions, 1133 flow [2024-06-03 19:27:44,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 116 transitions, 1045 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 19:27:44,458 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 841 flow [2024-06-03 19:27:44,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-03 19:27:44,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-03 19:27:44,459 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 841 flow [2024-06-03 19:27:44,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:44,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:44,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:44,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:27:44,460 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 19:27:44,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:44,460 INFO L85 PathProgramCache]: Analyzing trace with hash 729898036, now seen corresponding path program 1 times [2024-06-03 19:27:44,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:44,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706818527] [2024-06-03 19:27:44,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:44,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:45,376 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 19:27:45,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:45,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706818527] [2024-06-03 19:27:45,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706818527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:45,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:45,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:45,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932755699] [2024-06-03 19:27:45,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:45,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:45,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:45,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:45,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:45,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:27:45,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 841 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:45,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:45,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:27:45,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:46,151 INFO L124 PetriNetUnfolderBase]: 1888/2870 cut-off events. [2024-06-03 19:27:46,151 INFO L125 PetriNetUnfolderBase]: For 43029/43043 co-relation queries the response was YES. [2024-06-03 19:27:46,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15309 conditions, 2870 events. 1888/2870 cut-off events. For 43029/43043 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13467 event pairs, 619 based on Foata normal form. 6/2865 useless extension candidates. Maximal degree in co-relation 15264. Up to 2658 conditions per place. [2024-06-03 19:27:46,172 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 111 selfloop transitions, 20 changer transitions 0/147 dead transitions. [2024-06-03 19:27:46,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 147 transitions, 1243 flow [2024-06-03 19:27:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:27:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:27:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:27:46,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-03 19:27:46,174 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 841 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:27:46,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 147 transitions, 1243 flow [2024-06-03 19:27:46,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 147 transitions, 1221 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 19:27:46,208 INFO L231 Difference]: Finished difference. Result has 99 places, 111 transitions, 922 flow [2024-06-03 19:27:46,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=922, PETRI_PLACES=99, PETRI_TRANSITIONS=111} [2024-06-03 19:27:46,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-03 19:27:46,209 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 111 transitions, 922 flow [2024-06-03 19:27:46,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:46,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:46,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:46,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:27:46,210 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 19:27:46,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:46,210 INFO L85 PathProgramCache]: Analyzing trace with hash 729988401, now seen corresponding path program 1 times [2024-06-03 19:27:46,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:46,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387171758] [2024-06-03 19:27:46,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:46,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:46,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:46,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387171758] [2024-06-03 19:27:46,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387171758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:46,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:46,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:46,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430080051] [2024-06-03 19:27:46,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:46,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:46,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:46,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:46,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:47,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:47,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 111 transitions, 922 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 19:27:47,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:47,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:47,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:47,620 INFO L124 PetriNetUnfolderBase]: 2101/3108 cut-off events. [2024-06-03 19:27:47,620 INFO L125 PetriNetUnfolderBase]: For 50527/50527 co-relation queries the response was YES. [2024-06-03 19:27:47,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17228 conditions, 3108 events. 2101/3108 cut-off events. For 50527/50527 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14090 event pairs, 670 based on Foata normal form. 6/3114 useless extension candidates. Maximal degree in co-relation 17183. Up to 2996 conditions per place. [2024-06-03 19:27:47,635 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 126 selfloop transitions, 27 changer transitions 0/156 dead transitions. [2024-06-03 19:27:47,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 156 transitions, 1540 flow [2024-06-03 19:27:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:27:47,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 19:27:47,638 INFO L175 Difference]: Start difference. First operand has 99 places, 111 transitions, 922 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:27:47,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 156 transitions, 1540 flow [2024-06-03 19:27:47,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 156 transitions, 1463 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-03 19:27:47,671 INFO L231 Difference]: Finished difference. Result has 102 places, 122 transitions, 1059 flow [2024-06-03 19:27:47,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1059, PETRI_PLACES=102, PETRI_TRANSITIONS=122} [2024-06-03 19:27:47,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-03 19:27:47,671 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 122 transitions, 1059 flow [2024-06-03 19:27:47,672 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 19:27:47,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:47,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:47,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:27:47,672 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 19:27:47,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:47,672 INFO L85 PathProgramCache]: Analyzing trace with hash 733713051, now seen corresponding path program 2 times [2024-06-03 19:27:47,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:47,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172064392] [2024-06-03 19:27:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:47,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:48,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:48,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172064392] [2024-06-03 19:27:48,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172064392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:48,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:48,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:48,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546482350] [2024-06-03 19:27:48,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:48,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:48,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:48,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:48,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:48,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:48,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 122 transitions, 1059 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 19:27:48,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:48,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:48,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:48,961 INFO L124 PetriNetUnfolderBase]: 2233/3297 cut-off events. [2024-06-03 19:27:48,962 INFO L125 PetriNetUnfolderBase]: For 61682/61684 co-relation queries the response was YES. [2024-06-03 19:27:48,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19474 conditions, 3297 events. 2233/3297 cut-off events. For 61682/61684 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15080 event pairs, 653 based on Foata normal form. 8/3305 useless extension candidates. Maximal degree in co-relation 19426. Up to 2811 conditions per place. [2024-06-03 19:27:49,014 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 110 selfloop transitions, 62 changer transitions 0/175 dead transitions. [2024-06-03 19:27:49,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 175 transitions, 1957 flow [2024-06-03 19:27:49,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:27:49,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-03 19:27:49,016 INFO L175 Difference]: Start difference. First operand has 102 places, 122 transitions, 1059 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:27:49,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 175 transitions, 1957 flow [2024-06-03 19:27:49,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 175 transitions, 1839 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-03 19:27:49,057 INFO L231 Difference]: Finished difference. Result has 108 places, 137 transitions, 1324 flow [2024-06-03 19:27:49,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1324, PETRI_PLACES=108, PETRI_TRANSITIONS=137} [2024-06-03 19:27:49,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-03 19:27:49,058 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 137 transitions, 1324 flow [2024-06-03 19:27:49,058 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 19:27:49,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:49,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:49,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:27:49,058 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 19:27:49,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:49,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1770908655, now seen corresponding path program 3 times [2024-06-03 19:27:49,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:49,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635549060] [2024-06-03 19:27:49,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:49,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:49,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:49,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635549060] [2024-06-03 19:27:49,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635549060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:49,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:49,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:49,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912776790] [2024-06-03 19:27:49,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:49,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:49,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:49,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:49,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 137 transitions, 1324 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 19:27:49,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:49,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:49,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:50,453 INFO L124 PetriNetUnfolderBase]: 2221/3281 cut-off events. [2024-06-03 19:27:50,453 INFO L125 PetriNetUnfolderBase]: For 69535/69537 co-relation queries the response was YES. [2024-06-03 19:27:50,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20436 conditions, 3281 events. 2221/3281 cut-off events. For 69535/69537 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14999 event pairs, 657 based on Foata normal form. 8/3289 useless extension candidates. Maximal degree in co-relation 20385. Up to 2805 conditions per place. [2024-06-03 19:27:50,476 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 114 selfloop transitions, 57 changer transitions 0/174 dead transitions. [2024-06-03 19:27:50,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 174 transitions, 2004 flow [2024-06-03 19:27:50,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:50,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:50,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:27:50,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-03 19:27:50,478 INFO L175 Difference]: Start difference. First operand has 108 places, 137 transitions, 1324 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:27:50,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 174 transitions, 2004 flow [2024-06-03 19:27:50,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 174 transitions, 1875 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-03 19:27:50,550 INFO L231 Difference]: Finished difference. Result has 114 places, 137 transitions, 1323 flow [2024-06-03 19:27:50,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1323, PETRI_PLACES=114, PETRI_TRANSITIONS=137} [2024-06-03 19:27:50,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-03 19:27:50,551 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 137 transitions, 1323 flow [2024-06-03 19:27:50,551 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 19:27:50,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:50,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:50,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:27:50,552 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 19:27:50,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:50,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1770908810, now seen corresponding path program 2 times [2024-06-03 19:27:50,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:50,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951609346] [2024-06-03 19:27:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:50,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:51,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:51,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951609346] [2024-06-03 19:27:51,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951609346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:51,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:51,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:51,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140451426] [2024-06-03 19:27:51,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:51,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:51,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:51,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:51,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:51,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:27:51,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 137 transitions, 1323 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:51,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:51,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:27:51,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:52,082 INFO L124 PetriNetUnfolderBase]: 2102/3166 cut-off events. [2024-06-03 19:27:52,082 INFO L125 PetriNetUnfolderBase]: For 69650/69672 co-relation queries the response was YES. [2024-06-03 19:27:52,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19527 conditions, 3166 events. 2102/3166 cut-off events. For 69650/69672 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14908 event pairs, 640 based on Foata normal form. 12/3167 useless extension candidates. Maximal degree in co-relation 19474. Up to 2895 conditions per place. [2024-06-03 19:27:52,103 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 114 selfloop transitions, 29 changer transitions 0/166 dead transitions. [2024-06-03 19:27:52,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 166 transitions, 1735 flow [2024-06-03 19:27:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:52,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:52,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:27:52,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-03 19:27:52,104 INFO L175 Difference]: Start difference. First operand has 114 places, 137 transitions, 1323 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:27:52,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 166 transitions, 1735 flow [2024-06-03 19:27:52,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 166 transitions, 1574 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 19:27:52,155 INFO L231 Difference]: Finished difference. Result has 114 places, 140 transitions, 1294 flow [2024-06-03 19:27:52,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1294, PETRI_PLACES=114, PETRI_TRANSITIONS=140} [2024-06-03 19:27:52,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-03 19:27:52,156 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 140 transitions, 1294 flow [2024-06-03 19:27:52,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:52,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:52,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:52,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:27:52,156 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 19:27:52,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:52,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1025580777, now seen corresponding path program 4 times [2024-06-03 19:27:52,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:52,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122549447] [2024-06-03 19:27:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:52,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:52,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:52,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122549447] [2024-06-03 19:27:52,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122549447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:52,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:52,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:52,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984677618] [2024-06-03 19:27:52,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:52,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:52,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:52,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:52,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:52,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:52,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 140 transitions, 1294 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 19:27:52,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:52,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:52,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:53,454 INFO L124 PetriNetUnfolderBase]: 2268/3347 cut-off events. [2024-06-03 19:27:53,454 INFO L125 PetriNetUnfolderBase]: For 78622/78622 co-relation queries the response was YES. [2024-06-03 19:27:53,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20848 conditions, 3347 events. 2268/3347 cut-off events. For 78622/78622 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15290 event pairs, 689 based on Foata normal form. 6/3353 useless extension candidates. Maximal degree in co-relation 20796. Up to 3239 conditions per place. [2024-06-03 19:27:53,474 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 142 selfloop transitions, 25 changer transitions 0/170 dead transitions. [2024-06-03 19:27:53,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 170 transitions, 1806 flow [2024-06-03 19:27:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:53,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 19:27:53,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-03 19:27:53,475 INFO L175 Difference]: Start difference. First operand has 114 places, 140 transitions, 1294 flow. Second operand 8 states and 142 transitions. [2024-06-03 19:27:53,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 170 transitions, 1806 flow [2024-06-03 19:27:53,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 170 transitions, 1698 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:27:53,531 INFO L231 Difference]: Finished difference. Result has 116 places, 144 transitions, 1321 flow [2024-06-03 19:27:53,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1321, PETRI_PLACES=116, PETRI_TRANSITIONS=144} [2024-06-03 19:27:53,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-03 19:27:53,532 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 144 transitions, 1321 flow [2024-06-03 19:27:53,532 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 19:27:53,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:53,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:53,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:27:53,533 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 19:27:53,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:53,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1937182182, now seen corresponding path program 1 times [2024-06-03 19:27:53,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:53,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332462674] [2024-06-03 19:27:53,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:53,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:54,313 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 19:27:54,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:54,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332462674] [2024-06-03 19:27:54,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332462674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:54,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:54,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:54,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637633675] [2024-06-03 19:27:54,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:54,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:54,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:54,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:54,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:54,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:54,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 144 transitions, 1321 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 19:27:54,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:54,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:54,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:55,031 INFO L124 PetriNetUnfolderBase]: 2270/3350 cut-off events. [2024-06-03 19:27:55,031 INFO L125 PetriNetUnfolderBase]: For 83623/83623 co-relation queries the response was YES. [2024-06-03 19:27:55,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21173 conditions, 3350 events. 2270/3350 cut-off events. For 83623/83623 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15339 event pairs, 674 based on Foata normal form. 3/3353 useless extension candidates. Maximal degree in co-relation 21120. Up to 3243 conditions per place. [2024-06-03 19:27:55,050 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 136 selfloop transitions, 30 changer transitions 0/169 dead transitions. [2024-06-03 19:27:55,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 169 transitions, 1815 flow [2024-06-03 19:27:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 19:27:55,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-03 19:27:55,051 INFO L175 Difference]: Start difference. First operand has 116 places, 144 transitions, 1321 flow. Second operand 7 states and 127 transitions. [2024-06-03 19:27:55,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 169 transitions, 1815 flow [2024-06-03 19:27:55,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 169 transitions, 1716 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:27:55,115 INFO L231 Difference]: Finished difference. Result has 117 places, 148 transitions, 1368 flow [2024-06-03 19:27:55,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1368, PETRI_PLACES=117, PETRI_TRANSITIONS=148} [2024-06-03 19:27:55,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-03 19:27:55,116 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 148 transitions, 1368 flow [2024-06-03 19:27:55,116 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 19:27:55,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:55,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:55,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:27:55,117 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 19:27:55,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:55,117 INFO L85 PathProgramCache]: Analyzing trace with hash 877597846, now seen corresponding path program 3 times [2024-06-03 19:27:55,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:55,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422828847] [2024-06-03 19:27:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:55,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:55,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:55,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422828847] [2024-06-03 19:27:55,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422828847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:55,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:55,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:55,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178353280] [2024-06-03 19:27:55,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:55,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:55,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:55,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:55,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:56,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:27:56,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 148 transitions, 1368 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:56,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:56,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:27:56,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:56,625 INFO L124 PetriNetUnfolderBase]: 2130/3208 cut-off events. [2024-06-03 19:27:56,625 INFO L125 PetriNetUnfolderBase]: For 87272/87300 co-relation queries the response was YES. [2024-06-03 19:27:56,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20799 conditions, 3208 events. 2130/3208 cut-off events. For 87272/87300 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15144 event pairs, 619 based on Foata normal form. 6/3203 useless extension candidates. Maximal degree in co-relation 20745. Up to 2986 conditions per place. [2024-06-03 19:27:56,646 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 132 selfloop transitions, 17 changer transitions 0/174 dead transitions. [2024-06-03 19:27:56,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 174 transitions, 1794 flow [2024-06-03 19:27:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:27:56,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:27:56,648 INFO L175 Difference]: Start difference. First operand has 117 places, 148 transitions, 1368 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:27:56,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 174 transitions, 1794 flow [2024-06-03 19:27:56,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 174 transitions, 1700 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 19:27:56,727 INFO L231 Difference]: Finished difference. Result has 120 places, 151 transitions, 1392 flow [2024-06-03 19:27:56,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=120, PETRI_TRANSITIONS=151} [2024-06-03 19:27:56,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-03 19:27:56,728 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 151 transitions, 1392 flow [2024-06-03 19:27:56,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:56,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:56,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:56,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:27:56,728 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 19:27:56,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:56,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1657315555, now seen corresponding path program 5 times [2024-06-03 19:27:56,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:56,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806516272] [2024-06-03 19:27:56,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:56,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:57,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806516272] [2024-06-03 19:27:57,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806516272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:57,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:57,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:57,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206066883] [2024-06-03 19:27:57,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:57,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:57,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:57,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:57,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:57,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:57,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 151 transitions, 1392 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 19:27:57,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:57,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:57,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:58,079 INFO L124 PetriNetUnfolderBase]: 2301/3395 cut-off events. [2024-06-03 19:27:58,080 INFO L125 PetriNetUnfolderBase]: For 98770/98770 co-relation queries the response was YES. [2024-06-03 19:27:58,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22471 conditions, 3395 events. 2301/3395 cut-off events. For 98770/98770 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15567 event pairs, 668 based on Foata normal form. 6/3401 useless extension candidates. Maximal degree in co-relation 22416. Up to 3123 conditions per place. [2024-06-03 19:27:58,099 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 147 selfloop transitions, 37 changer transitions 0/187 dead transitions. [2024-06-03 19:27:58,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 187 transitions, 2174 flow [2024-06-03 19:27:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:58,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:27:58,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-03 19:27:58,101 INFO L175 Difference]: Start difference. First operand has 120 places, 151 transitions, 1392 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:27:58,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 187 transitions, 2174 flow [2024-06-03 19:27:58,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 187 transitions, 2080 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 19:27:58,170 INFO L231 Difference]: Finished difference. Result has 123 places, 156 transitions, 1502 flow [2024-06-03 19:27:58,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1502, PETRI_PLACES=123, PETRI_TRANSITIONS=156} [2024-06-03 19:27:58,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-03 19:27:58,171 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 156 transitions, 1502 flow [2024-06-03 19:27:58,171 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 19:27:58,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:58,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:58,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:27:58,171 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 19:27:58,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:58,172 INFO L85 PathProgramCache]: Analyzing trace with hash 877603581, now seen corresponding path program 6 times [2024-06-03 19:27:58,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:58,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057318671] [2024-06-03 19:27:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:58,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:58,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:58,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057318671] [2024-06-03 19:27:58,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057318671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:58,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:58,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:58,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509981115] [2024-06-03 19:27:58,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:58,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:58,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:58,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:58,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:58,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:58,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 156 transitions, 1502 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 19:27:58,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:58,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:58,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:59,514 INFO L124 PetriNetUnfolderBase]: 2305/3401 cut-off events. [2024-06-03 19:27:59,514 INFO L125 PetriNetUnfolderBase]: For 106195/106195 co-relation queries the response was YES. [2024-06-03 19:27:59,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23076 conditions, 3401 events. 2305/3401 cut-off events. For 106195/106195 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15569 event pairs, 679 based on Foata normal form. 6/3407 useless extension candidates. Maximal degree in co-relation 23019. Up to 3132 conditions per place. [2024-06-03 19:27:59,537 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 144 selfloop transitions, 41 changer transitions 0/188 dead transitions. [2024-06-03 19:27:59,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 188 transitions, 2137 flow [2024-06-03 19:27:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:59,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:27:59,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-03 19:27:59,538 INFO L175 Difference]: Start difference. First operand has 123 places, 156 transitions, 1502 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:27:59,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 188 transitions, 2137 flow [2024-06-03 19:27:59,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 188 transitions, 1939 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-03 19:27:59,622 INFO L231 Difference]: Finished difference. Result has 124 places, 160 transitions, 1488 flow [2024-06-03 19:27:59,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1488, PETRI_PLACES=124, PETRI_TRANSITIONS=160} [2024-06-03 19:27:59,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-03 19:27:59,623 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 160 transitions, 1488 flow [2024-06-03 19:27:59,623 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 19:27:59,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:59,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:59,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:27:59,624 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:59,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:59,624 INFO L85 PathProgramCache]: Analyzing trace with hash -601988692, now seen corresponding path program 1 times [2024-06-03 19:27:59,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:59,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410230627] [2024-06-03 19:27:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:59,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:00,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:00,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410230627] [2024-06-03 19:28:00,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410230627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:00,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:00,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:28:00,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999281795] [2024-06-03 19:28:00,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:00,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:28:00,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:00,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:28:00,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:28:00,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:28:00,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 160 transitions, 1488 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:00,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:00,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:28:00,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:00,772 INFO L124 PetriNetUnfolderBase]: 2143/3212 cut-off events. [2024-06-03 19:28:00,772 INFO L125 PetriNetUnfolderBase]: For 109273/109297 co-relation queries the response was YES. [2024-06-03 19:28:00,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22043 conditions, 3212 events. 2143/3212 cut-off events. For 109273/109297 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14986 event pairs, 661 based on Foata normal form. 3/3176 useless extension candidates. Maximal degree in co-relation 21986. Up to 3083 conditions per place. [2024-06-03 19:28:00,794 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 149 selfloop transitions, 11 changer transitions 0/174 dead transitions. [2024-06-03 19:28:00,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 174 transitions, 1862 flow [2024-06-03 19:28:00,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:28:00,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:28:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-03 19:28:00,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-03 19:28:00,795 INFO L175 Difference]: Start difference. First operand has 124 places, 160 transitions, 1488 flow. Second operand 6 states and 103 transitions. [2024-06-03 19:28:00,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 174 transitions, 1862 flow [2024-06-03 19:28:00,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 174 transitions, 1748 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:00,868 INFO L231 Difference]: Finished difference. Result has 125 places, 163 transitions, 1436 flow [2024-06-03 19:28:00,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1436, PETRI_PLACES=125, PETRI_TRANSITIONS=163} [2024-06-03 19:28:00,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-03 19:28:00,868 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 163 transitions, 1436 flow [2024-06-03 19:28:00,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:00,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:00,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:00,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:28:00,869 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 19:28:00,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:00,869 INFO L85 PathProgramCache]: Analyzing trace with hash 818255208, now seen corresponding path program 1 times [2024-06-03 19:28:00,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:00,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280537480] [2024-06-03 19:28:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:00,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:01,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:01,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280537480] [2024-06-03 19:28:01,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280537480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:01,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:01,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:01,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638398280] [2024-06-03 19:28:01,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:01,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:01,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:01,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:01,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:01,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:28:01,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 163 transitions, 1436 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:01,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:01,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:28:01,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:02,636 INFO L124 PetriNetUnfolderBase]: 2198/3314 cut-off events. [2024-06-03 19:28:02,636 INFO L125 PetriNetUnfolderBase]: For 116625/116657 co-relation queries the response was YES. [2024-06-03 19:28:02,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22917 conditions, 3314 events. 2198/3314 cut-off events. For 116625/116657 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15840 event pairs, 465 based on Foata normal form. 8/3311 useless extension candidates. Maximal degree in co-relation 22859. Up to 2974 conditions per place. [2024-06-03 19:28:02,656 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 159 selfloop transitions, 25 changer transitions 0/211 dead transitions. [2024-06-03 19:28:02,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 211 transitions, 2162 flow [2024-06-03 19:28:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:28:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:28:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-03 19:28:02,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-03 19:28:02,657 INFO L175 Difference]: Start difference. First operand has 125 places, 163 transitions, 1436 flow. Second operand 10 states and 185 transitions. [2024-06-03 19:28:02,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 211 transitions, 2162 flow [2024-06-03 19:28:02,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 211 transitions, 2120 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:28:02,738 INFO L231 Difference]: Finished difference. Result has 131 places, 167 transitions, 1599 flow [2024-06-03 19:28:02,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1599, PETRI_PLACES=131, PETRI_TRANSITIONS=167} [2024-06-03 19:28:02,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-03 19:28:02,739 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 167 transitions, 1599 flow [2024-06-03 19:28:02,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:02,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:02,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:02,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:28:02,739 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 19:28:02,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:02,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1152004360, now seen corresponding path program 1 times [2024-06-03 19:28:02,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:02,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025338618] [2024-06-03 19:28:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:02,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:03,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:03,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025338618] [2024-06-03 19:28:03,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025338618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:03,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:03,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:03,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146360162] [2024-06-03 19:28:03,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:03,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:03,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:03,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:03,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:03,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:03,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 167 transitions, 1599 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:03,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:03,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:03,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:04,355 INFO L124 PetriNetUnfolderBase]: 2465/3635 cut-off events. [2024-06-03 19:28:04,355 INFO L125 PetriNetUnfolderBase]: For 133375/133375 co-relation queries the response was YES. [2024-06-03 19:28:04,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25726 conditions, 3635 events. 2465/3635 cut-off events. For 133375/133375 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16952 event pairs, 634 based on Foata normal form. 6/3641 useless extension candidates. Maximal degree in co-relation 25667. Up to 3370 conditions per place. [2024-06-03 19:28:04,379 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 190 selfloop transitions, 41 changer transitions 0/234 dead transitions. [2024-06-03 19:28:04,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 234 transitions, 2807 flow [2024-06-03 19:28:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:28:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:28:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-03 19:28:04,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-03 19:28:04,382 INFO L175 Difference]: Start difference. First operand has 131 places, 167 transitions, 1599 flow. Second operand 10 states and 193 transitions. [2024-06-03 19:28:04,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 234 transitions, 2807 flow [2024-06-03 19:28:04,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 234 transitions, 2693 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-03 19:28:04,492 INFO L231 Difference]: Finished difference. Result has 137 places, 181 transitions, 1815 flow [2024-06-03 19:28:04,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1815, PETRI_PLACES=137, PETRI_TRANSITIONS=181} [2024-06-03 19:28:04,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-03 19:28:04,493 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 181 transitions, 1815 flow [2024-06-03 19:28:04,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:04,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:04,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:04,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:28:04,493 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 19:28:04,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:04,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1152004236, now seen corresponding path program 2 times [2024-06-03 19:28:04,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:04,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212717390] [2024-06-03 19:28:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:04,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:05,366 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 19:28:05,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:05,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212717390] [2024-06-03 19:28:05,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212717390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:05,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:05,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:05,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407808116] [2024-06-03 19:28:05,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:05,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:05,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:05,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:05,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:05,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:28:05,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 181 transitions, 1815 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:05,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:05,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:28:05,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:06,232 INFO L124 PetriNetUnfolderBase]: 2368/3547 cut-off events. [2024-06-03 19:28:06,233 INFO L125 PetriNetUnfolderBase]: For 143750/143782 co-relation queries the response was YES. [2024-06-03 19:28:06,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26049 conditions, 3547 events. 2368/3547 cut-off events. For 143750/143782 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16980 event pairs, 595 based on Foata normal form. 8/3544 useless extension candidates. Maximal degree in co-relation 25986. Up to 3241 conditions per place. [2024-06-03 19:28:06,256 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 170 selfloop transitions, 25 changer transitions 0/225 dead transitions. [2024-06-03 19:28:06,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 225 transitions, 2372 flow [2024-06-03 19:28:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:28:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:28:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-03 19:28:06,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-03 19:28:06,257 INFO L175 Difference]: Start difference. First operand has 137 places, 181 transitions, 1815 flow. Second operand 10 states and 182 transitions. [2024-06-03 19:28:06,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 225 transitions, 2372 flow [2024-06-03 19:28:06,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 225 transitions, 2225 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:06,383 INFO L231 Difference]: Finished difference. Result has 142 places, 184 transitions, 1792 flow [2024-06-03 19:28:06,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1792, PETRI_PLACES=142, PETRI_TRANSITIONS=184} [2024-06-03 19:28:06,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-03 19:28:06,384 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 184 transitions, 1792 flow [2024-06-03 19:28:06,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:06,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:06,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:06,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:28:06,385 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 19:28:06,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:06,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2101901248, now seen corresponding path program 3 times [2024-06-03 19:28:06,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:06,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702035626] [2024-06-03 19:28:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:06,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:07,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:07,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702035626] [2024-06-03 19:28:07,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702035626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:07,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:07,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:07,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463429355] [2024-06-03 19:28:07,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:07,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:07,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:07,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:07,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:07,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:28:07,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 184 transitions, 1792 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:07,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:07,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:28:07,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:08,095 INFO L124 PetriNetUnfolderBase]: 2360/3535 cut-off events. [2024-06-03 19:28:08,095 INFO L125 PetriNetUnfolderBase]: For 148459/148491 co-relation queries the response was YES. [2024-06-03 19:28:08,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25887 conditions, 3535 events. 2360/3535 cut-off events. For 148459/148491 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16945 event pairs, 598 based on Foata normal form. 8/3532 useless extension candidates. Maximal degree in co-relation 25822. Up to 3253 conditions per place. [2024-06-03 19:28:08,122 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 19 changer transitions 0/218 dead transitions. [2024-06-03 19:28:08,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 218 transitions, 2254 flow [2024-06-03 19:28:08,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:28:08,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:28:08,124 INFO L175 Difference]: Start difference. First operand has 142 places, 184 transitions, 1792 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:28:08,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 218 transitions, 2254 flow [2024-06-03 19:28:08,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 218 transitions, 2119 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-03 19:28:08,261 INFO L231 Difference]: Finished difference. Result has 145 places, 184 transitions, 1702 flow [2024-06-03 19:28:08,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1702, PETRI_PLACES=145, PETRI_TRANSITIONS=184} [2024-06-03 19:28:08,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-03 19:28:08,261 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 184 transitions, 1702 flow [2024-06-03 19:28:08,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:08,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:08,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:08,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:28:08,262 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 19:28:08,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:08,262 INFO L85 PathProgramCache]: Analyzing trace with hash 821116942, now seen corresponding path program 2 times [2024-06-03 19:28:08,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:08,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880660195] [2024-06-03 19:28:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:08,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:09,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:09,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880660195] [2024-06-03 19:28:09,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880660195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:09,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:09,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:09,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864132799] [2024-06-03 19:28:09,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:09,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:09,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:09,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:09,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:09,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:09,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 184 transitions, 1702 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:09,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:09,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:09,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:10,121 INFO L124 PetriNetUnfolderBase]: 2510/3702 cut-off events. [2024-06-03 19:28:10,121 INFO L125 PetriNetUnfolderBase]: For 158970/158970 co-relation queries the response was YES. [2024-06-03 19:28:10,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27084 conditions, 3702 events. 2510/3702 cut-off events. For 158970/158970 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17343 event pairs, 643 based on Foata normal form. 6/3708 useless extension candidates. Maximal degree in co-relation 27018. Up to 3556 conditions per place. [2024-06-03 19:28:10,145 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 193 selfloop transitions, 31 changer transitions 0/227 dead transitions. [2024-06-03 19:28:10,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 227 transitions, 2519 flow [2024-06-03 19:28:10,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:10,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:10,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:28:10,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-03 19:28:10,147 INFO L175 Difference]: Start difference. First operand has 145 places, 184 transitions, 1702 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:28:10,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 227 transitions, 2519 flow [2024-06-03 19:28:10,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 227 transitions, 2457 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-03 19:28:10,251 INFO L231 Difference]: Finished difference. Result has 145 places, 188 transitions, 1800 flow [2024-06-03 19:28:10,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1800, PETRI_PLACES=145, PETRI_TRANSITIONS=188} [2024-06-03 19:28:10,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-03 19:28:10,252 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 188 transitions, 1800 flow [2024-06-03 19:28:10,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:10,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:10,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:10,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:28:10,253 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 19:28:10,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:10,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1154800870, now seen corresponding path program 3 times [2024-06-03 19:28:10,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:10,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093234467] [2024-06-03 19:28:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:10,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:11,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:11,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093234467] [2024-06-03 19:28:11,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093234467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:11,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:11,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:11,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868695758] [2024-06-03 19:28:11,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:11,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:11,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:11,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:11,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:11,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:11,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 188 transitions, 1800 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:11,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:11,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:11,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:12,000 INFO L124 PetriNetUnfolderBase]: 2514/3708 cut-off events. [2024-06-03 19:28:12,001 INFO L125 PetriNetUnfolderBase]: For 166476/166476 co-relation queries the response was YES. [2024-06-03 19:28:12,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27419 conditions, 3708 events. 2514/3708 cut-off events. For 166476/166476 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17379 event pairs, 639 based on Foata normal form. 6/3714 useless extension candidates. Maximal degree in co-relation 27352. Up to 3499 conditions per place. [2024-06-03 19:28:12,027 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 195 selfloop transitions, 37 changer transitions 0/235 dead transitions. [2024-06-03 19:28:12,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 235 transitions, 2767 flow [2024-06-03 19:28:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:28:12,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 19:28:12,028 INFO L175 Difference]: Start difference. First operand has 145 places, 188 transitions, 1800 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:28:12,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 235 transitions, 2767 flow [2024-06-03 19:28:12,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 235 transitions, 2646 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:12,153 INFO L231 Difference]: Finished difference. Result has 148 places, 195 transitions, 1927 flow [2024-06-03 19:28:12,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1927, PETRI_PLACES=148, PETRI_TRANSITIONS=195} [2024-06-03 19:28:12,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-03 19:28:12,154 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 195 transitions, 1927 flow [2024-06-03 19:28:12,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:12,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:12,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:12,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:28:12,155 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 19:28:12,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:12,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2106554596, now seen corresponding path program 1 times [2024-06-03 19:28:12,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:12,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55886429] [2024-06-03 19:28:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:12,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:13,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:13,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55886429] [2024-06-03 19:28:13,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55886429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:13,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:13,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:13,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065562172] [2024-06-03 19:28:13,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:13,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:13,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:13,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:13,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:13,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:13,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 195 transitions, 1927 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:13,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:13,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:13,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:13,917 INFO L124 PetriNetUnfolderBase]: 2542/3754 cut-off events. [2024-06-03 19:28:13,917 INFO L125 PetriNetUnfolderBase]: For 180033/180035 co-relation queries the response was YES. [2024-06-03 19:28:13,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28132 conditions, 3754 events. 2542/3754 cut-off events. For 180033/180035 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17659 event pairs, 583 based on Foata normal form. 8/3762 useless extension candidates. Maximal degree in co-relation 28063. Up to 3518 conditions per place. [2024-06-03 19:28:13,946 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 188 selfloop transitions, 40 changer transitions 0/231 dead transitions. [2024-06-03 19:28:13,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 231 transitions, 2745 flow [2024-06-03 19:28:13,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:28:13,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:28:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:28:13,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 19:28:13,947 INFO L175 Difference]: Start difference. First operand has 148 places, 195 transitions, 1927 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:28:13,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 231 transitions, 2745 flow [2024-06-03 19:28:14,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 231 transitions, 2628 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:14,103 INFO L231 Difference]: Finished difference. Result has 151 places, 198 transitions, 1982 flow [2024-06-03 19:28:14,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1982, PETRI_PLACES=151, PETRI_TRANSITIONS=198} [2024-06-03 19:28:14,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-03 19:28:14,104 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 198 transitions, 1982 flow [2024-06-03 19:28:14,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:14,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:14,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:14,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:28:14,104 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 19:28:14,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1270269670, now seen corresponding path program 4 times [2024-06-03 19:28:14,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:14,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118679425] [2024-06-03 19:28:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:14,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:14,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:14,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118679425] [2024-06-03 19:28:14,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118679425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:14,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:14,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:14,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370727740] [2024-06-03 19:28:14,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:14,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:14,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:14,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:14,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:15,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:15,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 198 transitions, 1982 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:15,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:15,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:15,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:15,731 INFO L124 PetriNetUnfolderBase]: 2578/3806 cut-off events. [2024-06-03 19:28:15,732 INFO L125 PetriNetUnfolderBase]: For 188977/188979 co-relation queries the response was YES. [2024-06-03 19:28:15,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29047 conditions, 3806 events. 2578/3806 cut-off events. For 188977/188979 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17970 event pairs, 564 based on Foata normal form. 6/3812 useless extension candidates. Maximal degree in co-relation 28976. Up to 3193 conditions per place. [2024-06-03 19:28:15,759 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 159 selfloop transitions, 84 changer transitions 0/246 dead transitions. [2024-06-03 19:28:15,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 246 transitions, 3044 flow [2024-06-03 19:28:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 19:28:15,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-03 19:28:15,764 INFO L175 Difference]: Start difference. First operand has 151 places, 198 transitions, 1982 flow. Second operand 9 states and 175 transitions. [2024-06-03 19:28:15,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 246 transitions, 3044 flow [2024-06-03 19:28:15,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 246 transitions, 2896 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 19:28:15,905 INFO L231 Difference]: Finished difference. Result has 155 places, 205 transitions, 2196 flow [2024-06-03 19:28:15,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1834, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2196, PETRI_PLACES=155, PETRI_TRANSITIONS=205} [2024-06-03 19:28:15,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-03 19:28:15,905 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 205 transitions, 2196 flow [2024-06-03 19:28:15,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:15,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:15,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:15,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:28:15,906 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 19:28:15,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:15,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1270091916, now seen corresponding path program 4 times [2024-06-03 19:28:15,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:15,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102608815] [2024-06-03 19:28:15,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:15,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:16,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:16,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102608815] [2024-06-03 19:28:16,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102608815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:16,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:16,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:16,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741899528] [2024-06-03 19:28:16,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:16,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:16,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:16,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:16,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:16,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:28:16,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 205 transitions, 2196 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:16,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:16,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:28:16,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:17,595 INFO L124 PetriNetUnfolderBase]: 2470/3706 cut-off events. [2024-06-03 19:28:17,595 INFO L125 PetriNetUnfolderBase]: For 199543/199587 co-relation queries the response was YES. [2024-06-03 19:28:17,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29562 conditions, 3706 events. 2470/3706 cut-off events. For 199543/199587 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17980 event pairs, 588 based on Foata normal form. 14/3709 useless extension candidates. Maximal degree in co-relation 29489. Up to 3360 conditions per place. [2024-06-03 19:28:17,622 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 171 selfloop transitions, 31 changer transitions 0/238 dead transitions. [2024-06-03 19:28:17,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 238 transitions, 2768 flow [2024-06-03 19:28:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:28:17,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-03 19:28:17,624 INFO L175 Difference]: Start difference. First operand has 155 places, 205 transitions, 2196 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:28:17,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 238 transitions, 2768 flow [2024-06-03 19:28:17,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 238 transitions, 2610 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:17,806 INFO L231 Difference]: Finished difference. Result has 159 places, 207 transitions, 2201 flow [2024-06-03 19:28:17,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2201, PETRI_PLACES=159, PETRI_TRANSITIONS=207} [2024-06-03 19:28:17,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-03 19:28:17,807 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 207 transitions, 2201 flow [2024-06-03 19:28:17,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:17,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:17,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:17,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:28:17,807 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 19:28:17,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:17,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1270092040, now seen corresponding path program 5 times [2024-06-03 19:28:17,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:17,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987465027] [2024-06-03 19:28:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:17,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:18,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:18,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987465027] [2024-06-03 19:28:18,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987465027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:18,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:18,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:18,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807975551] [2024-06-03 19:28:18,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:18,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:18,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:18,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:18,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:18,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:18,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 207 transitions, 2201 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:18,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:18,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:18,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:19,545 INFO L124 PetriNetUnfolderBase]: 2655/3918 cut-off events. [2024-06-03 19:28:19,545 INFO L125 PetriNetUnfolderBase]: For 217800/217802 co-relation queries the response was YES. [2024-06-03 19:28:19,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31507 conditions, 3918 events. 2655/3918 cut-off events. For 217800/217802 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18625 event pairs, 564 based on Foata normal form. 8/3926 useless extension candidates. Maximal degree in co-relation 31432. Up to 3288 conditions per place. [2024-06-03 19:28:19,577 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 178 selfloop transitions, 79 changer transitions 0/260 dead transitions. [2024-06-03 19:28:19,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 260 transitions, 3381 flow [2024-06-03 19:28:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:28:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:28:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-03 19:28:19,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-03 19:28:19,578 INFO L175 Difference]: Start difference. First operand has 159 places, 207 transitions, 2201 flow. Second operand 10 states and 193 transitions. [2024-06-03 19:28:19,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 260 transitions, 3381 flow [2024-06-03 19:28:19,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 260 transitions, 3236 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:19,730 INFO L231 Difference]: Finished difference. Result has 163 places, 215 transitions, 2434 flow [2024-06-03 19:28:19,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2434, PETRI_PLACES=163, PETRI_TRANSITIONS=215} [2024-06-03 19:28:19,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-03 19:28:19,731 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 215 transitions, 2434 flow [2024-06-03 19:28:19,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:19,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:19,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:19,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:28:19,731 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 19:28:19,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:19,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2037501715, now seen corresponding path program 1 times [2024-06-03 19:28:19,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:19,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182365015] [2024-06-03 19:28:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:19,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:20,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:20,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182365015] [2024-06-03 19:28:20,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182365015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:20,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:20,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:28:20,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441753283] [2024-06-03 19:28:20,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:20,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:28:20,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:20,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:28:20,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:28:20,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:28:20,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 215 transitions, 2434 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:20,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:20,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:28:20,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:20,948 INFO L124 PetriNetUnfolderBase]: 2505/3746 cut-off events. [2024-06-03 19:28:20,948 INFO L125 PetriNetUnfolderBase]: For 226799/226823 co-relation queries the response was YES. [2024-06-03 19:28:20,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31677 conditions, 3746 events. 2505/3746 cut-off events. For 226799/226823 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18231 event pairs, 627 based on Foata normal form. 2/3709 useless extension candidates. Maximal degree in co-relation 31600. Up to 3588 conditions per place. [2024-06-03 19:28:20,979 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 199 selfloop transitions, 22 changer transitions 0/236 dead transitions. [2024-06-03 19:28:20,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 236 transitions, 3078 flow [2024-06-03 19:28:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:28:20,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:28:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-03 19:28:20,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-03 19:28:20,980 INFO L175 Difference]: Start difference. First operand has 163 places, 215 transitions, 2434 flow. Second operand 6 states and 110 transitions. [2024-06-03 19:28:20,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 236 transitions, 3078 flow [2024-06-03 19:28:21,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 236 transitions, 2853 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-03 19:28:21,173 INFO L231 Difference]: Finished difference. Result has 163 places, 220 transitions, 2350 flow [2024-06-03 19:28:21,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2350, PETRI_PLACES=163, PETRI_TRANSITIONS=220} [2024-06-03 19:28:21,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-03 19:28:21,173 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 220 transitions, 2350 flow [2024-06-03 19:28:21,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:21,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:21,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:21,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:28:21,174 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 19:28:21,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:21,174 INFO L85 PathProgramCache]: Analyzing trace with hash 163006840, now seen corresponding path program 2 times [2024-06-03 19:28:21,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:21,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441028336] [2024-06-03 19:28:21,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:21,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:22,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:22,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441028336] [2024-06-03 19:28:22,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441028336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:22,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:22,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:22,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125225069] [2024-06-03 19:28:22,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:22,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:22,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:22,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:22,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:22,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:22,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 220 transitions, 2350 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:22,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:22,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:22,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:23,045 INFO L124 PetriNetUnfolderBase]: 2693/3987 cut-off events. [2024-06-03 19:28:23,045 INFO L125 PetriNetUnfolderBase]: For 239113/239113 co-relation queries the response was YES. [2024-06-03 19:28:23,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32860 conditions, 3987 events. 2693/3987 cut-off events. For 239113/239113 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19225 event pairs, 1047 based on Foata normal form. 6/3993 useless extension candidates. Maximal degree in co-relation 32781. Up to 3814 conditions per place. [2024-06-03 19:28:23,073 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 217 selfloop transitions, 32 changer transitions 0/252 dead transitions. [2024-06-03 19:28:23,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 252 transitions, 3181 flow [2024-06-03 19:28:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 19:28:23,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:28:23,075 INFO L175 Difference]: Start difference. First operand has 163 places, 220 transitions, 2350 flow. Second operand 9 states and 153 transitions. [2024-06-03 19:28:23,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 252 transitions, 3181 flow [2024-06-03 19:28:23,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 252 transitions, 3131 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 19:28:23,299 INFO L231 Difference]: Finished difference. Result has 170 places, 225 transitions, 2494 flow [2024-06-03 19:28:23,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2494, PETRI_PLACES=170, PETRI_TRANSITIONS=225} [2024-06-03 19:28:23,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-03 19:28:23,299 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 225 transitions, 2494 flow [2024-06-03 19:28:23,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:23,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:23,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:23,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:28:23,300 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 19:28:23,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:23,300 INFO L85 PathProgramCache]: Analyzing trace with hash 162999896, now seen corresponding path program 6 times [2024-06-03 19:28:23,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:23,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836836850] [2024-06-03 19:28:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:23,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:24,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:24,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836836850] [2024-06-03 19:28:24,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836836850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:24,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:24,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:24,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139622286] [2024-06-03 19:28:24,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:24,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:24,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:24,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:24,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:24,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:24,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 225 transitions, 2494 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:24,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:24,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:24,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:24,985 INFO L124 PetriNetUnfolderBase]: 2729/4039 cut-off events. [2024-06-03 19:28:24,986 INFO L125 PetriNetUnfolderBase]: For 252783/252783 co-relation queries the response was YES. [2024-06-03 19:28:25,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33984 conditions, 4039 events. 2729/4039 cut-off events. For 252783/252783 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19428 event pairs, 1052 based on Foata normal form. 6/4045 useless extension candidates. Maximal degree in co-relation 33903. Up to 3661 conditions per place. [2024-06-03 19:28:25,023 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 206 selfloop transitions, 55 changer transitions 0/264 dead transitions. [2024-06-03 19:28:25,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 264 transitions, 3530 flow [2024-06-03 19:28:25,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:25,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:25,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:28:25,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-03 19:28:25,025 INFO L175 Difference]: Start difference. First operand has 170 places, 225 transitions, 2494 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:28:25,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 264 transitions, 3530 flow [2024-06-03 19:28:25,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 264 transitions, 3391 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:25,301 INFO L231 Difference]: Finished difference. Result has 174 places, 229 transitions, 2602 flow [2024-06-03 19:28:25,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2602, PETRI_PLACES=174, PETRI_TRANSITIONS=229} [2024-06-03 19:28:25,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-03 19:28:25,301 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 229 transitions, 2602 flow [2024-06-03 19:28:25,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:25,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:25,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:25,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:28:25,303 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 19:28:25,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:25,303 INFO L85 PathProgramCache]: Analyzing trace with hash 390907990, now seen corresponding path program 3 times [2024-06-03 19:28:25,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:25,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474188819] [2024-06-03 19:28:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:25,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:26,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:26,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474188819] [2024-06-03 19:28:26,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474188819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:26,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:26,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106404504] [2024-06-03 19:28:26,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:26,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:26,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:26,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:26,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:26,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:26,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 229 transitions, 2602 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:26,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:26,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:26,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:27,162 INFO L124 PetriNetUnfolderBase]: 2757/4083 cut-off events. [2024-06-03 19:28:27,162 INFO L125 PetriNetUnfolderBase]: For 265509/265509 co-relation queries the response was YES. [2024-06-03 19:28:27,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34972 conditions, 4083 events. 2757/4083 cut-off events. For 265509/265509 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19678 event pairs, 1064 based on Foata normal form. 6/4089 useless extension candidates. Maximal degree in co-relation 34889. Up to 3970 conditions per place. [2024-06-03 19:28:27,197 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 228 selfloop transitions, 26 changer transitions 0/257 dead transitions. [2024-06-03 19:28:27,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 257 transitions, 3358 flow [2024-06-03 19:28:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:27,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 19:28:27,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-03 19:28:27,198 INFO L175 Difference]: Start difference. First operand has 174 places, 229 transitions, 2602 flow. Second operand 9 states and 150 transitions. [2024-06-03 19:28:27,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 257 transitions, 3358 flow [2024-06-03 19:28:27,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 257 transitions, 3120 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:27,473 INFO L231 Difference]: Finished difference. Result has 176 places, 232 transitions, 2534 flow [2024-06-03 19:28:27,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2534, PETRI_PLACES=176, PETRI_TRANSITIONS=232} [2024-06-03 19:28:27,473 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-03 19:28:27,473 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 232 transitions, 2534 flow [2024-06-03 19:28:27,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:27,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:27,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:27,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:28:27,474 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 19:28:27,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:27,474 INFO L85 PathProgramCache]: Analyzing trace with hash 399478870, now seen corresponding path program 4 times [2024-06-03 19:28:27,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:27,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904698083] [2024-06-03 19:28:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:27,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:28,282 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 19:28:28,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:28,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904698083] [2024-06-03 19:28:28,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904698083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:28,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:28,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:28,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273506534] [2024-06-03 19:28:28,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:28,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:28,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:28,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:28,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:28,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:28,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 232 transitions, 2534 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:28,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:28,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:28,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:29,224 INFO L124 PetriNetUnfolderBase]: 2785/4127 cut-off events. [2024-06-03 19:28:29,225 INFO L125 PetriNetUnfolderBase]: For 276853/276853 co-relation queries the response was YES. [2024-06-03 19:28:29,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35327 conditions, 4127 events. 2785/4127 cut-off events. For 276853/276853 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19971 event pairs, 1055 based on Foata normal form. 6/4133 useless extension candidates. Maximal degree in co-relation 35243. Up to 3986 conditions per place. [2024-06-03 19:28:29,258 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 228 selfloop transitions, 29 changer transitions 0/260 dead transitions. [2024-06-03 19:28:29,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 260 transitions, 3302 flow [2024-06-03 19:28:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:28:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:28:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 19:28:29,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-03 19:28:29,259 INFO L175 Difference]: Start difference. First operand has 176 places, 232 transitions, 2534 flow. Second operand 8 states and 142 transitions. [2024-06-03 19:28:29,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 260 transitions, 3302 flow [2024-06-03 19:28:29,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 260 transitions, 3156 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:29,541 INFO L231 Difference]: Finished difference. Result has 177 places, 235 transitions, 2570 flow [2024-06-03 19:28:29,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2570, PETRI_PLACES=177, PETRI_TRANSITIONS=235} [2024-06-03 19:28:29,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-03 19:28:29,542 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 235 transitions, 2570 flow [2024-06-03 19:28:29,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:29,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:29,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:29,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:28:29,545 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:29,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:29,545 INFO L85 PathProgramCache]: Analyzing trace with hash 390901046, now seen corresponding path program 7 times [2024-06-03 19:28:29,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:29,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185156494] [2024-06-03 19:28:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:29,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:30,298 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 19:28:30,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:30,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185156494] [2024-06-03 19:28:30,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185156494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:30,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:30,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:30,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61032247] [2024-06-03 19:28:30,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:30,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:30,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:30,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:30,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:30,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 235 transitions, 2570 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:30,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:30,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:30,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:31,322 INFO L124 PetriNetUnfolderBase]: 2832/4195 cut-off events. [2024-06-03 19:28:31,322 INFO L125 PetriNetUnfolderBase]: For 292951/292951 co-relation queries the response was YES. [2024-06-03 19:28:31,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36324 conditions, 4195 events. 2832/4195 cut-off events. For 292951/292951 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20359 event pairs, 1070 based on Foata normal form. 6/4201 useless extension candidates. Maximal degree in co-relation 36239. Up to 3981 conditions per place. [2024-06-03 19:28:31,359 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 229 selfloop transitions, 43 changer transitions 0/275 dead transitions. [2024-06-03 19:28:31,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 275 transitions, 3691 flow [2024-06-03 19:28:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:28:31,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-03 19:28:31,360 INFO L175 Difference]: Start difference. First operand has 177 places, 235 transitions, 2570 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:28:31,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 275 transitions, 3691 flow [2024-06-03 19:28:31,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 275 transitions, 3533 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-03 19:28:31,720 INFO L231 Difference]: Finished difference. Result has 181 places, 243 transitions, 2779 flow [2024-06-03 19:28:31,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2779, PETRI_PLACES=181, PETRI_TRANSITIONS=243} [2024-06-03 19:28:31,721 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-03 19:28:31,721 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 243 transitions, 2779 flow [2024-06-03 19:28:31,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:31,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:31,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:31,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:28:31,722 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:31,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:31,722 INFO L85 PathProgramCache]: Analyzing trace with hash 162826916, now seen corresponding path program 8 times [2024-06-03 19:28:31,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:31,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266257253] [2024-06-03 19:28:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:31,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:32,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:32,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266257253] [2024-06-03 19:28:32,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266257253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:32,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:32,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:32,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006522930] [2024-06-03 19:28:32,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:32,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:32,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:32,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:32,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:32,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:32,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 243 transitions, 2779 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:32,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:32,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:32,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:33,415 INFO L124 PetriNetUnfolderBase]: 2868/4247 cut-off events. [2024-06-03 19:28:33,415 INFO L125 PetriNetUnfolderBase]: For 306076/306076 co-relation queries the response was YES. [2024-06-03 19:28:33,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37461 conditions, 4247 events. 2868/4247 cut-off events. For 306076/306076 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20666 event pairs, 1044 based on Foata normal form. 6/4253 useless extension candidates. Maximal degree in co-relation 37374. Up to 3867 conditions per place. [2024-06-03 19:28:33,456 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 220 selfloop transitions, 61 changer transitions 0/284 dead transitions. [2024-06-03 19:28:33,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 284 transitions, 3959 flow [2024-06-03 19:28:33,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:33,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:28:33,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-03 19:28:33,457 INFO L175 Difference]: Start difference. First operand has 181 places, 243 transitions, 2779 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:28:33,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 284 transitions, 3959 flow [2024-06-03 19:28:33,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 284 transitions, 3777 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:33,785 INFO L231 Difference]: Finished difference. Result has 186 places, 250 transitions, 2949 flow [2024-06-03 19:28:33,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2949, PETRI_PLACES=186, PETRI_TRANSITIONS=250} [2024-06-03 19:28:33,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-03 19:28:33,785 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 250 transitions, 2949 flow [2024-06-03 19:28:33,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:33,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:33,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:33,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:28:33,786 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:33,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:33,786 INFO L85 PathProgramCache]: Analyzing trace with hash 399182200, now seen corresponding path program 5 times [2024-06-03 19:28:33,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:33,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858086502] [2024-06-03 19:28:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:33,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:34,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:34,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858086502] [2024-06-03 19:28:34,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858086502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:34,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:34,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:34,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986998625] [2024-06-03 19:28:34,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:34,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:34,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:34,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:34,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:34,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:34,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 250 transitions, 2949 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:34,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:34,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:34,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:35,600 INFO L124 PetriNetUnfolderBase]: 2871/4252 cut-off events. [2024-06-03 19:28:35,600 INFO L125 PetriNetUnfolderBase]: For 316962/316962 co-relation queries the response was YES. [2024-06-03 19:28:35,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38077 conditions, 4252 events. 2871/4252 cut-off events. For 316962/316962 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20693 event pairs, 1068 based on Foata normal form. 6/4258 useless extension candidates. Maximal degree in co-relation 37987. Up to 4080 conditions per place. [2024-06-03 19:28:35,642 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 238 selfloop transitions, 37 changer transitions 0/278 dead transitions. [2024-06-03 19:28:35,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 278 transitions, 3777 flow [2024-06-03 19:28:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:28:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:28:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:28:35,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-03 19:28:35,645 INFO L175 Difference]: Start difference. First operand has 186 places, 250 transitions, 2949 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:28:35,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 278 transitions, 3777 flow [2024-06-03 19:28:35,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 278 transitions, 3562 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:35,995 INFO L231 Difference]: Finished difference. Result has 189 places, 253 transitions, 2952 flow [2024-06-03 19:28:35,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2734, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2952, PETRI_PLACES=189, PETRI_TRANSITIONS=253} [2024-06-03 19:28:35,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-03 19:28:35,995 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 253 transitions, 2952 flow [2024-06-03 19:28:35,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:35,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:35,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:35,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:28:35,996 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:35,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:35,996 INFO L85 PathProgramCache]: Analyzing trace with hash 399181952, now seen corresponding path program 1 times [2024-06-03 19:28:35,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:35,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229589369] [2024-06-03 19:28:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:35,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:36,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:36,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229589369] [2024-06-03 19:28:36,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229589369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:36,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:36,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:36,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577561622] [2024-06-03 19:28:36,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:36,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:36,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:36,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:36,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:36,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:36,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 253 transitions, 2952 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:36,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:36,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:36,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:37,695 INFO L124 PetriNetUnfolderBase]: 2862/4239 cut-off events. [2024-06-03 19:28:37,695 INFO L125 PetriNetUnfolderBase]: For 320504/320504 co-relation queries the response was YES. [2024-06-03 19:28:37,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37845 conditions, 4239 events. 2862/4239 cut-off events. For 320504/320504 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 20635 event pairs, 1067 based on Foata normal form. 3/4242 useless extension candidates. Maximal degree in co-relation 37754. Up to 4072 conditions per place. [2024-06-03 19:28:37,737 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 236 selfloop transitions, 39 changer transitions 0/278 dead transitions. [2024-06-03 19:28:37,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 278 transitions, 3658 flow [2024-06-03 19:28:37,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:28:37,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:28:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:28:37,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:28:37,738 INFO L175 Difference]: Start difference. First operand has 189 places, 253 transitions, 2952 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:28:37,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 278 transitions, 3658 flow [2024-06-03 19:28:38,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 278 transitions, 3406 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-03 19:28:38,122 INFO L231 Difference]: Finished difference. Result has 191 places, 253 transitions, 2792 flow [2024-06-03 19:28:38,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2792, PETRI_PLACES=191, PETRI_TRANSITIONS=253} [2024-06-03 19:28:38,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-03 19:28:38,123 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 253 transitions, 2792 flow [2024-06-03 19:28:38,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:38,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:38,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:38,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:28:38,123 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:38,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:38,123 INFO L85 PathProgramCache]: Analyzing trace with hash 162822266, now seen corresponding path program 9 times [2024-06-03 19:28:38,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:38,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617741681] [2024-06-03 19:28:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:38,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:38,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:38,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617741681] [2024-06-03 19:28:38,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617741681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:38,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:38,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:38,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293773351] [2024-06-03 19:28:38,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:38,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:38,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:38,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:38,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:38,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:38,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 253 transitions, 2792 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:38,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:38,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:38,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:39,797 INFO L124 PetriNetUnfolderBase]: 2866/4245 cut-off events. [2024-06-03 19:28:39,797 INFO L125 PetriNetUnfolderBase]: For 330657/330657 co-relation queries the response was YES. [2024-06-03 19:28:39,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37636 conditions, 4245 events. 2866/4245 cut-off events. For 330657/330657 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 20626 event pairs, 1039 based on Foata normal form. 6/4251 useless extension candidates. Maximal degree in co-relation 37544. Up to 3719 conditions per place. [2024-06-03 19:28:39,838 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 219 selfloop transitions, 73 changer transitions 0/295 dead transitions. [2024-06-03 19:28:39,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 295 transitions, 4102 flow [2024-06-03 19:28:39,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:39,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:28:39,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-03 19:28:39,839 INFO L175 Difference]: Start difference. First operand has 191 places, 253 transitions, 2792 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:28:39,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 295 transitions, 4102 flow [2024-06-03 19:28:40,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 295 transitions, 4024 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:40,294 INFO L231 Difference]: Finished difference. Result has 194 places, 261 transitions, 3171 flow [2024-06-03 19:28:40,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2714, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3171, PETRI_PLACES=194, PETRI_TRANSITIONS=261} [2024-06-03 19:28:40,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-03 19:28:40,294 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 261 transitions, 3171 flow [2024-06-03 19:28:40,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:40,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:40,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:40,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:28:40,295 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:40,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:40,295 INFO L85 PathProgramCache]: Analyzing trace with hash 162822142, now seen corresponding path program 5 times [2024-06-03 19:28:40,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:40,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803412908] [2024-06-03 19:28:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:40,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:41,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:41,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803412908] [2024-06-03 19:28:41,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803412908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:41,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:41,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:41,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506502548] [2024-06-03 19:28:41,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:41,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:41,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:41,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:41,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:41,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:28:41,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 261 transitions, 3171 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:41,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:41,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:28:41,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:42,168 INFO L124 PetriNetUnfolderBase]: 2748/4122 cut-off events. [2024-06-03 19:28:42,169 INFO L125 PetriNetUnfolderBase]: For 347427/347459 co-relation queries the response was YES. [2024-06-03 19:28:42,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37868 conditions, 4122 events. 2748/4122 cut-off events. For 347427/347459 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20499 event pairs, 990 based on Foata normal form. 11/4106 useless extension candidates. Maximal degree in co-relation 37774. Up to 3778 conditions per place. [2024-06-03 19:28:42,206 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 219 selfloop transitions, 20 changer transitions 0/290 dead transitions. [2024-06-03 19:28:42,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 290 transitions, 3833 flow [2024-06-03 19:28:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:28:42,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-03 19:28:42,207 INFO L175 Difference]: Start difference. First operand has 194 places, 261 transitions, 3171 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:28:42,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 290 transitions, 3833 flow [2024-06-03 19:28:42,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 290 transitions, 3569 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:42,630 INFO L231 Difference]: Finished difference. Result has 198 places, 263 transitions, 3074 flow [2024-06-03 19:28:42,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2907, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3074, PETRI_PLACES=198, PETRI_TRANSITIONS=263} [2024-06-03 19:28:42,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-03 19:28:42,630 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 263 transitions, 3074 flow [2024-06-03 19:28:42,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:42,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:42,630 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 19:28:42,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:28:42,631 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 19:28:42,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:42,631 INFO L85 PathProgramCache]: Analyzing trace with hash 754968021, now seen corresponding path program 1 times [2024-06-03 19:28:42,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:42,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127730654] [2024-06-03 19:28:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:42,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:43,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:43,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127730654] [2024-06-03 19:28:43,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127730654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:43,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:43,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:28:43,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363863967] [2024-06-03 19:28:43,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:43,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:28:43,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:43,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:28:43,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:28:43,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:28:43,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 263 transitions, 3074 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:43,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:43,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:28:43,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:44,088 INFO L124 PetriNetUnfolderBase]: 2740/4111 cut-off events. [2024-06-03 19:28:44,088 INFO L125 PetriNetUnfolderBase]: For 361943/361996 co-relation queries the response was YES. [2024-06-03 19:28:44,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37554 conditions, 4111 events. 2740/4111 cut-off events. For 361943/361996 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20716 event pairs, 1046 based on Foata normal form. 16/4087 useless extension candidates. Maximal degree in co-relation 37458. Up to 3895 conditions per place. [2024-06-03 19:28:44,128 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 22 changer transitions 0/286 dead transitions. [2024-06-03 19:28:44,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 286 transitions, 3816 flow [2024-06-03 19:28:44,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:28:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:28:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 19:28:44,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-03 19:28:44,129 INFO L175 Difference]: Start difference. First operand has 198 places, 263 transitions, 3074 flow. Second operand 7 states and 121 transitions. [2024-06-03 19:28:44,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 286 transitions, 3816 flow [2024-06-03 19:28:44,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 286 transitions, 3667 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:44,570 INFO L231 Difference]: Finished difference. Result has 199 places, 272 transitions, 3076 flow [2024-06-03 19:28:44,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2925, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3076, PETRI_PLACES=199, PETRI_TRANSITIONS=272} [2024-06-03 19:28:44,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-03 19:28:44,570 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 272 transitions, 3076 flow [2024-06-03 19:28:44,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:44,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:44,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:44,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:28:44,571 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:44,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:44,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1499666905, now seen corresponding path program 2 times [2024-06-03 19:28:44,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:44,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654524702] [2024-06-03 19:28:44,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:44,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:45,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:45,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654524702] [2024-06-03 19:28:45,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654524702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:45,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:45,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:28:45,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911547793] [2024-06-03 19:28:45,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:45,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:28:45,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:45,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:28:45,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:28:45,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:28:45,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 272 transitions, 3076 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:45,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:45,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:28:45,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:45,882 INFO L124 PetriNetUnfolderBase]: 2722/4085 cut-off events. [2024-06-03 19:28:45,882 INFO L125 PetriNetUnfolderBase]: For 362841/362884 co-relation queries the response was YES. [2024-06-03 19:28:45,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37661 conditions, 4085 events. 2722/4085 cut-off events. For 362841/362884 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20596 event pairs, 1046 based on Foata normal form. 12/4055 useless extension candidates. Maximal degree in co-relation 37563. Up to 3917 conditions per place. [2024-06-03 19:28:45,919 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 246 selfloop transitions, 14 changer transitions 0/280 dead transitions. [2024-06-03 19:28:45,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 280 transitions, 3616 flow [2024-06-03 19:28:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:28:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:28:45,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-03 19:28:45,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-03 19:28:45,920 INFO L175 Difference]: Start difference. First operand has 199 places, 272 transitions, 3076 flow. Second operand 6 states and 101 transitions. [2024-06-03 19:28:45,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 280 transitions, 3616 flow [2024-06-03 19:28:46,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 280 transitions, 3540 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-03 19:28:46,323 INFO L231 Difference]: Finished difference. Result has 202 places, 272 transitions, 3036 flow [2024-06-03 19:28:46,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3000, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3036, PETRI_PLACES=202, PETRI_TRANSITIONS=272} [2024-06-03 19:28:46,324 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-03 19:28:46,324 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 272 transitions, 3036 flow [2024-06-03 19:28:46,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:46,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:46,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:46,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:28:46,324 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:46,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:46,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1220222261, now seen corresponding path program 1 times [2024-06-03 19:28:46,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:46,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8321224] [2024-06-03 19:28:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:46,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:46,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:46,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8321224] [2024-06-03 19:28:46,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8321224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:46,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:46,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:28:46,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321650864] [2024-06-03 19:28:46,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:46,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:28:46,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:46,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:28:46,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:28:46,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:46,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 272 transitions, 3036 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:46,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:46,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:46,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:47,830 INFO L124 PetriNetUnfolderBase]: 2929/4332 cut-off events. [2024-06-03 19:28:47,830 INFO L125 PetriNetUnfolderBase]: For 367055/367055 co-relation queries the response was YES. [2024-06-03 19:28:47,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39313 conditions, 4332 events. 2929/4332 cut-off events. For 367055/367055 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20994 event pairs, 1093 based on Foata normal form. 3/4335 useless extension candidates. Maximal degree in co-relation 39214. Up to 4251 conditions per place. [2024-06-03 19:28:47,879 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 259 selfloop transitions, 25 changer transitions 0/287 dead transitions. [2024-06-03 19:28:47,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 287 transitions, 3778 flow [2024-06-03 19:28:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:28:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:28:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-03 19:28:47,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-03 19:28:47,880 INFO L175 Difference]: Start difference. First operand has 202 places, 272 transitions, 3036 flow. Second operand 6 states and 106 transitions. [2024-06-03 19:28:47,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 287 transitions, 3778 flow [2024-06-03 19:28:48,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 287 transitions, 3737 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:48,320 INFO L231 Difference]: Finished difference. Result has 203 places, 275 transitions, 3102 flow [2024-06-03 19:28:48,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2995, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3102, PETRI_PLACES=203, PETRI_TRANSITIONS=275} [2024-06-03 19:28:48,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-03 19:28:48,320 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 275 transitions, 3102 flow [2024-06-03 19:28:48,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:48,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:48,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:48,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:28:48,321 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:48,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:48,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1481411563, now seen corresponding path program 2 times [2024-06-03 19:28:48,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:48,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955008048] [2024-06-03 19:28:48,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:48,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:48,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:48,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955008048] [2024-06-03 19:28:48,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955008048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:48,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:48,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:28:48,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935107470] [2024-06-03 19:28:48,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:48,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:28:48,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:48,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:28:48,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:28:48,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:48,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 275 transitions, 3102 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:48,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:48,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:48,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:49,778 INFO L124 PetriNetUnfolderBase]: 2894/4280 cut-off events. [2024-06-03 19:28:49,778 INFO L125 PetriNetUnfolderBase]: For 375077/375079 co-relation queries the response was YES. [2024-06-03 19:28:49,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39185 conditions, 4280 events. 2894/4280 cut-off events. For 375077/375079 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20722 event pairs, 1103 based on Foata normal form. 1/4281 useless extension candidates. Maximal degree in co-relation 39085. Up to 4200 conditions per place. [2024-06-03 19:28:49,814 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 254 selfloop transitions, 26 changer transitions 0/283 dead transitions. [2024-06-03 19:28:49,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 283 transitions, 3682 flow [2024-06-03 19:28:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:28:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:28:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-03 19:28:49,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-03 19:28:49,815 INFO L175 Difference]: Start difference. First operand has 203 places, 275 transitions, 3102 flow. Second operand 6 states and 103 transitions. [2024-06-03 19:28:49,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 283 transitions, 3682 flow [2024-06-03 19:28:50,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 283 transitions, 3628 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:28:50,282 INFO L231 Difference]: Finished difference. Result has 205 places, 275 transitions, 3106 flow [2024-06-03 19:28:50,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3048, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3106, PETRI_PLACES=205, PETRI_TRANSITIONS=275} [2024-06-03 19:28:50,282 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-03 19:28:50,282 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 275 transitions, 3106 flow [2024-06-03 19:28:50,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:50,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:50,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:50,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:28:50,283 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 19:28:50,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:50,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1283331388, now seen corresponding path program 1 times [2024-06-03 19:28:50,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:50,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203747322] [2024-06-03 19:28:50,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:50,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:51,122 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 19:28:51,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:51,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203747322] [2024-06-03 19:28:51,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203747322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:51,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:51,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:28:51,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747272730] [2024-06-03 19:28:51,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:51,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:28:51,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:51,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:28:51,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:28:51,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:51,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 275 transitions, 3106 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 19:28:51,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:51,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:51,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:52,428 INFO L124 PetriNetUnfolderBase]: 3638/5410 cut-off events. [2024-06-03 19:28:52,429 INFO L125 PetriNetUnfolderBase]: For 509375/509381 co-relation queries the response was YES. [2024-06-03 19:28:52,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51402 conditions, 5410 events. 3638/5410 cut-off events. For 509375/509381 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27903 event pairs, 768 based on Foata normal form. 30/5440 useless extension candidates. Maximal degree in co-relation 51301. Up to 4329 conditions per place. [2024-06-03 19:28:52,483 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 344 selfloop transitions, 72 changer transitions 0/419 dead transitions. [2024-06-03 19:28:52,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 419 transitions, 5832 flow [2024-06-03 19:28:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 19:28:52,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 19:28:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 250 transitions. [2024-06-03 19:28:52,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45787545787545786 [2024-06-03 19:28:52,484 INFO L175 Difference]: Start difference. First operand has 205 places, 275 transitions, 3106 flow. Second operand 13 states and 250 transitions. [2024-06-03 19:28:52,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 419 transitions, 5832 flow [2024-06-03 19:28:53,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 419 transitions, 5764 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:53,116 INFO L231 Difference]: Finished difference. Result has 219 places, 323 transitions, 4025 flow [2024-06-03 19:28:53,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3038, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4025, PETRI_PLACES=219, PETRI_TRANSITIONS=323} [2024-06-03 19:28:53,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-03 19:28:53,117 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 323 transitions, 4025 flow [2024-06-03 19:28:53,117 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 19:28:53,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:53,117 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 19:28:53,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:28:53,117 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 19:28:53,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash 903424700, now seen corresponding path program 2 times [2024-06-03 19:28:53,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:53,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889756298] [2024-06-03 19:28:53,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:53,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:54,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:54,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889756298] [2024-06-03 19:28:54,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889756298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:54,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:54,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:28:54,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526000477] [2024-06-03 19:28:54,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:54,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:28:54,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:54,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:28:54,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:28:54,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:54,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 323 transitions, 4025 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 19:28:54,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:54,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:54,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:55,797 INFO L124 PetriNetUnfolderBase]: 4996/7469 cut-off events. [2024-06-03 19:28:55,798 INFO L125 PetriNetUnfolderBase]: For 732291/732295 co-relation queries the response was YES. [2024-06-03 19:28:55,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77831 conditions, 7469 events. 4996/7469 cut-off events. For 732291/732295 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41607 event pairs, 1235 based on Foata normal form. 28/7497 useless extension candidates. Maximal degree in co-relation 77723. Up to 5657 conditions per place. [2024-06-03 19:28:55,882 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 385 selfloop transitions, 119 changer transitions 0/507 dead transitions. [2024-06-03 19:28:55,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 507 transitions, 7813 flow [2024-06-03 19:28:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:28:55,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:28:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-06-03 19:28:55,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-03 19:28:55,883 INFO L175 Difference]: Start difference. First operand has 219 places, 323 transitions, 4025 flow. Second operand 12 states and 232 transitions. [2024-06-03 19:28:55,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 507 transitions, 7813 flow [2024-06-03 19:28:57,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 507 transitions, 7532 flow, removed 115 selfloop flow, removed 4 redundant places. [2024-06-03 19:28:57,203 INFO L231 Difference]: Finished difference. Result has 233 places, 415 transitions, 5923 flow [2024-06-03 19:28:57,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3875, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5923, PETRI_PLACES=233, PETRI_TRANSITIONS=415} [2024-06-03 19:28:57,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-03 19:28:57,203 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 415 transitions, 5923 flow [2024-06-03 19:28:57,204 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 19:28:57,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:57,204 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 19:28:57,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:28:57,204 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 19:28:57,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:57,204 INFO L85 PathProgramCache]: Analyzing trace with hash 393527662, now seen corresponding path program 3 times [2024-06-03 19:28:57,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:57,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799164788] [2024-06-03 19:28:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:57,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:57,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:57,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799164788] [2024-06-03 19:28:57,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799164788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:57,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:57,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:57,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818141603] [2024-06-03 19:28:57,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:57,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:57,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:57,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:57,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:57,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:57,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 415 transitions, 5923 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 19:28:57,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:57,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:57,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:00,308 INFO L124 PetriNetUnfolderBase]: 6648/10119 cut-off events. [2024-06-03 19:29:00,308 INFO L125 PetriNetUnfolderBase]: For 1167888/1167894 co-relation queries the response was YES. [2024-06-03 19:29:00,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115768 conditions, 10119 events. 6648/10119 cut-off events. For 1167888/1167894 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 62104 event pairs, 1427 based on Foata normal form. 30/10149 useless extension candidates. Maximal degree in co-relation 115652. Up to 4659 conditions per place. [2024-06-03 19:29:00,425 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 351 selfloop transitions, 176 changer transitions 0/530 dead transitions. [2024-06-03 19:29:00,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 530 transitions, 9494 flow [2024-06-03 19:29:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:29:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:29:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-03 19:29:00,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-03 19:29:00,426 INFO L175 Difference]: Start difference. First operand has 233 places, 415 transitions, 5923 flow. Second operand 11 states and 220 transitions. [2024-06-03 19:29:00,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 530 transitions, 9494 flow [2024-06-03 19:29:02,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 530 transitions, 9151 flow, removed 167 selfloop flow, removed 2 redundant places. [2024-06-03 19:29:02,642 INFO L231 Difference]: Finished difference. Result has 245 places, 446 transitions, 7182 flow [2024-06-03 19:29:02,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5798, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7182, PETRI_PLACES=245, PETRI_TRANSITIONS=446} [2024-06-03 19:29:02,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-03 19:29:02,643 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 446 transitions, 7182 flow [2024-06-03 19:29:02,643 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 19:29:02,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:02,643 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 19:29:02,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:29:02,643 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 19:29:02,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:02,644 INFO L85 PathProgramCache]: Analyzing trace with hash 493292008, now seen corresponding path program 4 times [2024-06-03 19:29:02,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:02,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940111257] [2024-06-03 19:29:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:02,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:03,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:03,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940111257] [2024-06-03 19:29:03,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940111257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:03,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:03,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:03,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198369839] [2024-06-03 19:29:03,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:03,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:03,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:03,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:03,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:03,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:29:03,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 446 transitions, 7182 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 19:29:03,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:03,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:29:03,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:06,865 INFO L124 PetriNetUnfolderBase]: 8268/12600 cut-off events. [2024-06-03 19:29:06,865 INFO L125 PetriNetUnfolderBase]: For 1535006/1535012 co-relation queries the response was YES. [2024-06-03 19:29:06,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151272 conditions, 12600 events. 8268/12600 cut-off events. For 1535006/1535012 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 80662 event pairs, 2412 based on Foata normal form. 46/12646 useless extension candidates. Maximal degree in co-relation 151151. Up to 7572 conditions per place. [2024-06-03 19:29:07,102 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 368 selfloop transitions, 241 changer transitions 0/612 dead transitions. [2024-06-03 19:29:07,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 612 transitions, 11636 flow [2024-06-03 19:29:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:29:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:29:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-06-03 19:29:07,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-03 19:29:07,112 INFO L175 Difference]: Start difference. First operand has 245 places, 446 transitions, 7182 flow. Second operand 12 states and 236 transitions. [2024-06-03 19:29:07,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 612 transitions, 11636 flow [2024-06-03 19:29:10,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 612 transitions, 11223 flow, removed 125 selfloop flow, removed 4 redundant places. [2024-06-03 19:29:10,484 INFO L231 Difference]: Finished difference. Result has 257 places, 520 transitions, 9300 flow [2024-06-03 19:29:10,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6933, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9300, PETRI_PLACES=257, PETRI_TRANSITIONS=520} [2024-06-03 19:29:10,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-03 19:29:10,485 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 520 transitions, 9300 flow [2024-06-03 19:29:10,485 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 19:29:10,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:10,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:10,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:29:10,485 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 19:29:10,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:10,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1962472060, now seen corresponding path program 5 times [2024-06-03 19:29:10,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:10,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877712043] [2024-06-03 19:29:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:10,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:11,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:11,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877712043] [2024-06-03 19:29:11,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877712043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:11,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:11,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:11,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611379352] [2024-06-03 19:29:11,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:11,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:11,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:11,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:11,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:11,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:29:11,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 520 transitions, 9300 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 19:29:11,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:11,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:29:11,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:15,366 INFO L124 PetriNetUnfolderBase]: 9852/15052 cut-off events. [2024-06-03 19:29:15,366 INFO L125 PetriNetUnfolderBase]: For 2085671/2085673 co-relation queries the response was YES. [2024-06-03 19:29:15,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190707 conditions, 15052 events. 9852/15052 cut-off events. For 2085671/2085673 co-relation queries the response was YES. Maximal size of possible extension queue 886. Compared 99953 event pairs, 3524 based on Foata normal form. 114/15166 useless extension candidates. Maximal degree in co-relation 190580. Up to 10978 conditions per place. [2024-06-03 19:29:15,556 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 428 selfloop transitions, 247 changer transitions 0/678 dead transitions. [2024-06-03 19:29:15,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 678 transitions, 13852 flow [2024-06-03 19:29:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:29:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:29:15,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-06-03 19:29:15,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-03 19:29:15,557 INFO L175 Difference]: Start difference. First operand has 257 places, 520 transitions, 9300 flow. Second operand 12 states and 232 transitions. [2024-06-03 19:29:15,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 678 transitions, 13852 flow [2024-06-03 19:29:20,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 678 transitions, 13559 flow, removed 113 selfloop flow, removed 5 redundant places. [2024-06-03 19:29:20,172 INFO L231 Difference]: Finished difference. Result has 265 places, 578 transitions, 11132 flow [2024-06-03 19:29:20,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9007, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11132, PETRI_PLACES=265, PETRI_TRANSITIONS=578} [2024-06-03 19:29:20,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-03 19:29:20,172 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 578 transitions, 11132 flow [2024-06-03 19:29:20,173 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 19:29:20,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:20,173 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 19:29:20,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:29:20,173 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 19:29:20,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash 493382218, now seen corresponding path program 6 times [2024-06-03 19:29:20,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:20,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737082476] [2024-06-03 19:29:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:20,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:20,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:20,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737082476] [2024-06-03 19:29:20,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737082476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:20,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:20,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:20,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100494009] [2024-06-03 19:29:20,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:20,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:20,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:20,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:20,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:21,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:29:21,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 578 transitions, 11132 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 19:29:21,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:21,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:29:21,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:25,362 INFO L124 PetriNetUnfolderBase]: 9888/15156 cut-off events. [2024-06-03 19:29:25,362 INFO L125 PetriNetUnfolderBase]: For 2082588/2082590 co-relation queries the response was YES. [2024-06-03 19:29:25,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189070 conditions, 15156 events. 9888/15156 cut-off events. For 2082588/2082590 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 100917 event pairs, 3834 based on Foata normal form. 134/15290 useless extension candidates. Maximal degree in co-relation 188941. Up to 12670 conditions per place. [2024-06-03 19:29:25,547 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 426 selfloop transitions, 246 changer transitions 0/675 dead transitions. [2024-06-03 19:29:25,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 675 transitions, 14095 flow [2024-06-03 19:29:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:29:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:29:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 229 transitions. [2024-06-03 19:29:25,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45436507936507936 [2024-06-03 19:29:25,549 INFO L175 Difference]: Start difference. First operand has 265 places, 578 transitions, 11132 flow. Second operand 12 states and 229 transitions. [2024-06-03 19:29:25,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 675 transitions, 14095 flow [2024-06-03 19:29:30,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 675 transitions, 13658 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-03 19:29:30,288 INFO L231 Difference]: Finished difference. Result has 272 places, 593 transitions, 11724 flow [2024-06-03 19:29:30,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10695, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11724, PETRI_PLACES=272, PETRI_TRANSITIONS=593} [2024-06-03 19:29:30,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-03 19:29:30,288 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 593 transitions, 11724 flow [2024-06-03 19:29:30,289 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 19:29:30,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:30,289 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 19:29:30,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:29:30,289 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 19:29:30,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:30,289 INFO L85 PathProgramCache]: Analyzing trace with hash 905302370, now seen corresponding path program 7 times [2024-06-03 19:29:30,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:30,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708580882] [2024-06-03 19:29:30,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:30,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:31,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:31,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708580882] [2024-06-03 19:29:31,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708580882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:31,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:31,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:29:31,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510607956] [2024-06-03 19:29:31,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:31,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:29:31,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:31,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:29:31,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:29:31,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:29:31,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 593 transitions, 11724 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 19:29:31,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:31,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:29:31,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:35,783 INFO L124 PetriNetUnfolderBase]: 10183/15608 cut-off events. [2024-06-03 19:29:35,783 INFO L125 PetriNetUnfolderBase]: For 2003640/2003644 co-relation queries the response was YES. [2024-06-03 19:29:35,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193005 conditions, 15608 events. 10183/15608 cut-off events. For 2003640/2003644 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 104325 event pairs, 3833 based on Foata normal form. 98/15706 useless extension candidates. Maximal degree in co-relation 192872. Up to 13764 conditions per place. [2024-06-03 19:29:36,007 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 510 selfloop transitions, 177 changer transitions 0/690 dead transitions. [2024-06-03 19:29:36,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 690 transitions, 14484 flow [2024-06-03 19:29:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 19:29:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 19:29:36,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 239 transitions. [2024-06-03 19:29:36,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43772893772893773 [2024-06-03 19:29:36,008 INFO L175 Difference]: Start difference. First operand has 272 places, 593 transitions, 11724 flow. Second operand 13 states and 239 transitions. [2024-06-03 19:29:36,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 690 transitions, 14484 flow [2024-06-03 19:29:41,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 690 transitions, 13830 flow, removed 92 selfloop flow, removed 9 redundant places. [2024-06-03 19:29:41,267 INFO L231 Difference]: Finished difference. Result has 281 places, 622 transitions, 12378 flow [2024-06-03 19:29:41,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11159, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12378, PETRI_PLACES=281, PETRI_TRANSITIONS=622} [2024-06-03 19:29:41,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-03 19:29:41,267 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 622 transitions, 12378 flow [2024-06-03 19:29:41,268 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 19:29:41,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:41,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:41,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:29:41,268 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 19:29:41,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:41,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1699725742, now seen corresponding path program 8 times [2024-06-03 19:29:41,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:41,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487120830] [2024-06-03 19:29:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:41,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:42,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:42,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487120830] [2024-06-03 19:29:42,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487120830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:42,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:42,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:29:42,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466047609] [2024-06-03 19:29:42,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:42,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:29:42,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:42,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:29:42,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:29:42,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:29:42,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 622 transitions, 12378 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 19:29:42,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:42,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:29:42,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:46,922 INFO L124 PetriNetUnfolderBase]: 10253/15721 cut-off events. [2024-06-03 19:29:46,923 INFO L125 PetriNetUnfolderBase]: For 1869830/1869834 co-relation queries the response was YES. [2024-06-03 19:29:47,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189066 conditions, 15721 events. 10253/15721 cut-off events. For 1869830/1869834 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 105099 event pairs, 3508 based on Foata normal form. 76/15797 useless extension candidates. Maximal degree in co-relation 188927. Up to 12291 conditions per place. [2024-06-03 19:29:47,128 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 528 selfloop transitions, 175 changer transitions 0/706 dead transitions. [2024-06-03 19:29:47,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 706 transitions, 15219 flow [2024-06-03 19:29:47,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:29:47,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:29:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 225 transitions. [2024-06-03 19:29:47,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 19:29:47,129 INFO L175 Difference]: Start difference. First operand has 281 places, 622 transitions, 12378 flow. Second operand 12 states and 225 transitions. [2024-06-03 19:29:47,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 706 transitions, 15219 flow [2024-06-03 19:29:52,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 706 transitions, 14828 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-03 19:29:52,596 INFO L231 Difference]: Finished difference. Result has 286 places, 638 transitions, 13058 flow [2024-06-03 19:29:52,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11989, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13058, PETRI_PLACES=286, PETRI_TRANSITIONS=638} [2024-06-03 19:29:52,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-03 19:29:52,597 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 638 transitions, 13058 flow [2024-06-03 19:29:52,597 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 19:29:52,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:52,597 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 19:29:52,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:29:52,597 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 19:29:52,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:52,598 INFO L85 PathProgramCache]: Analyzing trace with hash 276565636, now seen corresponding path program 1 times [2024-06-03 19:29:52,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:52,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145052156] [2024-06-03 19:29:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:52,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:53,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:53,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145052156] [2024-06-03 19:29:53,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145052156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:53,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:53,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:29:53,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417099616] [2024-06-03 19:29:53,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:53,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:29:53,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:53,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:29:53,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:29:53,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:29:53,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 638 transitions, 13058 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 19:29:53,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:53,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:29:53,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:58,264 INFO L124 PetriNetUnfolderBase]: 10779/16499 cut-off events. [2024-06-03 19:29:58,264 INFO L125 PetriNetUnfolderBase]: For 1768901/1768907 co-relation queries the response was YES. [2024-06-03 19:29:58,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193979 conditions, 16499 events. 10779/16499 cut-off events. For 1768901/1768907 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 110881 event pairs, 3838 based on Foata normal form. 12/16511 useless extension candidates. Maximal degree in co-relation 193838. Up to 15175 conditions per place. [2024-06-03 19:29:58,641 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 582 selfloop transitions, 200 changer transitions 0/785 dead transitions. [2024-06-03 19:29:58,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 785 transitions, 16498 flow [2024-06-03 19:29:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:29:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:29:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-03 19:29:58,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-03 19:29:58,643 INFO L175 Difference]: Start difference. First operand has 286 places, 638 transitions, 13058 flow. Second operand 10 states and 193 transitions. [2024-06-03 19:29:58,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 785 transitions, 16498 flow [2024-06-03 19:30:03,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 785 transitions, 16152 flow, removed 83 selfloop flow, removed 8 redundant places. [2024-06-03 19:30:03,540 INFO L231 Difference]: Finished difference. Result has 292 places, 702 transitions, 14206 flow [2024-06-03 19:30:03,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12712, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14206, PETRI_PLACES=292, PETRI_TRANSITIONS=702} [2024-06-03 19:30:03,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-03 19:30:03,540 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 702 transitions, 14206 flow [2024-06-03 19:30:03,541 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 19:30:03,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:03,541 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 19:30:03,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:30:03,541 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 19:30:03,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:03,541 INFO L85 PathProgramCache]: Analyzing trace with hash 276559684, now seen corresponding path program 9 times [2024-06-03 19:30:03,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:03,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644465233] [2024-06-03 19:30:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:03,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:04,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:04,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644465233] [2024-06-03 19:30:04,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644465233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:04,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:04,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:30:04,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681514527] [2024-06-03 19:30:04,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:04,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:30:04,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:04,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:30:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:30:04,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:30:04,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 702 transitions, 14206 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 19:30:04,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:04,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:30:04,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:09,568 INFO L124 PetriNetUnfolderBase]: 11027/16879 cut-off events. [2024-06-03 19:30:09,569 INFO L125 PetriNetUnfolderBase]: For 1841986/1841992 co-relation queries the response was YES. [2024-06-03 19:30:09,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197500 conditions, 16879 events. 11027/16879 cut-off events. For 1841986/1841992 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 113992 event pairs, 3847 based on Foata normal form. 36/16915 useless extension candidates. Maximal degree in co-relation 197353. Up to 15520 conditions per place. [2024-06-03 19:30:09,848 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 671 selfloop transitions, 183 changer transitions 0/857 dead transitions. [2024-06-03 19:30:09,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 857 transitions, 18000 flow [2024-06-03 19:30:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:30:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:30:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-03 19:30:09,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-03 19:30:09,853 INFO L175 Difference]: Start difference. First operand has 292 places, 702 transitions, 14206 flow. Second operand 11 states and 213 transitions. [2024-06-03 19:30:09,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 857 transitions, 18000 flow [2024-06-03 19:30:14,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 857 transitions, 17589 flow, removed 97 selfloop flow, removed 3 redundant places. [2024-06-03 19:30:14,936 INFO L231 Difference]: Finished difference. Result has 303 places, 753 transitions, 15247 flow [2024-06-03 19:30:14,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13839, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15247, PETRI_PLACES=303, PETRI_TRANSITIONS=753} [2024-06-03 19:30:14,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-03 19:30:14,937 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 753 transitions, 15247 flow [2024-06-03 19:30:14,937 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 19:30:14,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:14,938 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 19:30:14,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:30:14,938 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 19:30:14,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:14,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1966717790, now seen corresponding path program 2 times [2024-06-03 19:30:14,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:14,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95022049] [2024-06-03 19:30:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:14,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat