./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix016.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix016.oepc.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/mix016.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix016.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:48:40,606 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:48:40,655 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:48:40,662 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:48:40,664 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:48:40,677 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:48:40,682 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:48:40,682 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:48:40,683 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:48:40,685 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:48:40,686 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:48:40,686 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:48:40,687 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:48:40,687 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:48:40,688 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:48:40,688 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:48:40,688 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:48:40,688 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:48:40,689 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:48:40,689 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:48:40,689 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:48:40,689 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:48:40,689 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:48:40,690 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:48:40,690 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:48:40,690 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:48:40,690 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:48:40,690 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:48:40,691 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:48:40,691 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:48:40,692 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:48:40,692 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:48:40,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:48:40,693 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:48:40,693 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:48:40,693 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:48:40,693 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:48:40,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:48:40,694 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:48:40,694 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:48:40,694 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:48:40,694 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:48:40,694 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:48:40,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:48:40,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:48:40,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:48:40,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:48:40,935 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:48:40,935 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:48:40,936 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix016.oepc.yml/witness.yml [2024-06-04 14:48:41,063 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:48:41,063 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:48:41,064 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix016.oepc.i [2024-06-04 14:48:42,054 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:48:42,278 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:48:42,279 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix016.oepc.i [2024-06-04 14:48:42,289 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bffe9251f/a4817425a1804564bd5c2e117ae6d687/FLAGe961a74c4 [2024-06-04 14:48:42,298 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bffe9251f/a4817425a1804564bd5c2e117ae6d687 [2024-06-04 14:48:42,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:48:42,304 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:48:42,306 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:48:42,306 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:48:42,309 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:48:42,310 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:48:41" (1/2) ... [2024-06-04 14:48:42,311 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6957339 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:48:42, skipping insertion in model container [2024-06-04 14:48:42,311 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:48:41" (1/2) ... [2024-06-04 14:48:42,312 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7ac8b49b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:48:42, skipping insertion in model container [2024-06-04 14:48:42,312 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:48:42" (2/2) ... [2024-06-04 14:48:42,312 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6957339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42, skipping insertion in model container [2024-06-04 14:48:42,313 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:48:42" (2/2) ... [2024-06-04 14:48:42,313 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:48:42,383 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:48:42,385 INFO L97 edCorrectnessWitness]: Location invariant before [L845-L845] (((((((((((((((((((! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-04 14:48:42,385 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-04 14:48:42,385 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] (((((((((((((((((((! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-04 14:48:42,385 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:48:42,385 INFO L106 edCorrectnessWitness]: ghost_update [L841-L841] multithreaded = 1; [2024-06-04 14:48:42,417 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:48:42,729 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:48:42,740 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:48:42,829 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:48:42,862 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:48:42,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42 WrapperNode [2024-06-04 14:48:42,862 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:48:42,864 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:48:42,864 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:48:42,864 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:48:42,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42" (1/1) ... [2024-06-04 14:48:42,902 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42" (1/1) ... [2024-06-04 14:48:42,971 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-04 14:48:42,971 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:48:42,972 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:48:42,972 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:48:42,972 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:48:42,981 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42" (1/1) ... [2024-06-04 14:48:42,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42" (1/1) ... [2024-06-04 14:48:42,995 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42" (1/1) ... [2024-06-04 14:48:43,010 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]. [2024-06-04 14:48:43,013 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42" (1/1) ... [2024-06-04 14:48:43,013 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42" (1/1) ... [2024-06-04 14:48:43,033 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42" (1/1) ... [2024-06-04 14:48:43,035 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42" (1/1) ... [2024-06-04 14:48:43,036 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42" (1/1) ... [2024-06-04 14:48:43,038 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42" (1/1) ... [2024-06-04 14:48:43,042 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:48:43,042 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:48:43,042 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:48:43,042 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:48:43,043 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42" (1/1) ... [2024-06-04 14:48:43,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:48:43,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:48:43,076 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) [2024-06-04 14:48:43,129 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 [2024-06-04 14:48:43,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:48:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:48:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:48:43,147 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:48:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:48:43,147 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:48:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:48:43,147 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:48:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:48:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:48:43,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:48:43,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:48:43,149 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:48:43,246 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:48:43,248 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:48:43,519 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:48:43,520 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:48:43,696 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:48:43,696 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:48:43,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:48:43 BoogieIcfgContainer [2024-06-04 14:48:43,697 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:48:43,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:48:43,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:48:43,702 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:48:43,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:48:41" (1/4) ... [2024-06-04 14:48:43,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37def435 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:48:43, skipping insertion in model container [2024-06-04 14:48:43,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:48:42" (2/4) ... [2024-06-04 14:48:43,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37def435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:48:43, skipping insertion in model container [2024-06-04 14:48:43,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:42" (3/4) ... [2024-06-04 14:48:43,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37def435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:48:43, skipping insertion in model container [2024-06-04 14:48:43,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:48:43" (4/4) ... [2024-06-04 14:48:43,707 INFO L112 eAbstractionObserver]: Analyzing ICFG mix016.oepc.i [2024-06-04 14:48:43,719 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:48:43,719 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 14:48:43,720 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:48:43,766 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:48:43,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 14:48:43,826 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-04 14:48:43,826 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:48:43,828 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 62 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. [2024-06-04 14:48:43,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 14:48:43,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-04 14:48:43,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:48:43,845 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;@561d5937, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:48:43,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 14:48:43,852 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:48:43,852 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:48:43,852 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:48:43,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:43,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:48:43,854 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)] === [2024-06-04 14:48:43,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:43,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1248596661, now seen corresponding path program 1 times [2024-06-04 14:48:43,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:43,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100101122] [2024-06-04 14:48:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:43,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:44,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:44,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100101122] [2024-06-04 14:48:44,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100101122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:44,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:44,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:48:44,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535905320] [2024-06-04 14:48:44,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:44,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:48:44,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:44,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:48:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:48:44,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-04 14:48:44,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:44,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:44,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-04 14:48:44,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:45,222 INFO L124 PetriNetUnfolderBase]: 1116/1757 cut-off events. [2024-06-04 14:48:45,223 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-04 14:48:45,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3510 conditions, 1757 events. 1116/1757 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8469 event pairs, 765 based on Foata normal form. 1/1728 useless extension candidates. Maximal degree in co-relation 3495. Up to 1676 conditions per place. [2024-06-04 14:48:45,235 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 14:48:45,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-04 14:48:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:48:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:48:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-04 14:48:45,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-04 14:48:45,247 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 76 transitions. [2024-06-04 14:48:45,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-04 14:48:45,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:48:45,251 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-04 14:48:45,253 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} [2024-06-04 14:48:45,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-04 14:48:45,256 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-04 14:48:45,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:45,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:45,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:45,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:48:45,257 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)] === [2024-06-04 14:48:45,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:45,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1605470230, now seen corresponding path program 1 times [2024-06-04 14:48:45,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:45,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706689126] [2024-06-04 14:48:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:45,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:45,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:45,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706689126] [2024-06-04 14:48:45,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706689126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:45,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:45,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:48:45,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29635337] [2024-06-04 14:48:45,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:45,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:48:45,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:45,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:48:45,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:48:45,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-04 14:48:45,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:45,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:45,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-04 14:48:45,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:46,144 INFO L124 PetriNetUnfolderBase]: 1110/1756 cut-off events. [2024-06-04 14:48:46,144 INFO L125 PetriNetUnfolderBase]: For 339/339 co-relation queries the response was YES. [2024-06-04 14:48:46,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3979 conditions, 1756 events. 1110/1756 cut-off events. For 339/339 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8528 event pairs, 641 based on Foata normal form. 3/1757 useless extension candidates. Maximal degree in co-relation 3964. Up to 1652 conditions per place. [2024-06-04 14:48:46,155 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-04 14:48:46,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 242 flow [2024-06-04 14:48:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:48:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:48:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-04 14:48:46,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 14:48:46,159 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 98 transitions. [2024-06-04 14:48:46,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 242 flow [2024-06-04 14:48:46,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:48:46,162 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-04 14:48:46,163 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} [2024-06-04 14:48:46,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-04 14:48:46,163 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-04 14:48:46,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:46,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:46,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:46,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:48:46,166 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)] === [2024-06-04 14:48:46,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:46,169 INFO L85 PathProgramCache]: Analyzing trace with hash -963584375, now seen corresponding path program 1 times [2024-06-04 14:48:46,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:46,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345947285] [2024-06-04 14:48:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:46,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:47,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:47,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345947285] [2024-06-04 14:48:47,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345947285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:47,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:47,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:48:47,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502461733] [2024-06-04 14:48:47,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:47,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:48:47,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:47,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:48:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:48:47,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:48:47,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:47,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:47,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:48:47,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:47,510 INFO L124 PetriNetUnfolderBase]: 1345/2103 cut-off events. [2024-06-04 14:48:47,511 INFO L125 PetriNetUnfolderBase]: For 1107/1107 co-relation queries the response was YES. [2024-06-04 14:48:47,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5284 conditions, 2103 events. 1345/2103 cut-off events. For 1107/1107 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10170 event pairs, 592 based on Foata normal form. 3/2104 useless extension candidates. Maximal degree in co-relation 5267. Up to 1965 conditions per place. [2024-06-04 14:48:47,520 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-04 14:48:47,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 376 flow [2024-06-04 14:48:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:48:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:48:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-04 14:48:47,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436507936507936 [2024-06-04 14:48:47,522 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 137 transitions. [2024-06-04 14:48:47,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 376 flow [2024-06-04 14:48:47,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 356 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-04 14:48:47,524 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-04 14:48:47,525 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} [2024-06-04 14:48:47,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-04 14:48:47,525 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-04 14:48:47,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:47,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:47,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:47,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:48:47,526 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)] === [2024-06-04 14:48:47,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:47,526 INFO L85 PathProgramCache]: Analyzing trace with hash 193656989, now seen corresponding path program 1 times [2024-06-04 14:48:47,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:47,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219136921] [2024-06-04 14:48:47,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:47,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:48,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:48,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219136921] [2024-06-04 14:48:48,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219136921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:48,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:48,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:48:48,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824101548] [2024-06-04 14:48:48,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:48,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:48:48,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:48,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:48:48,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:48:48,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:48:48,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:48,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:48,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:48:48,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:48,952 INFO L124 PetriNetUnfolderBase]: 1336/2086 cut-off events. [2024-06-04 14:48:48,952 INFO L125 PetriNetUnfolderBase]: For 2178/2178 co-relation queries the response was YES. [2024-06-04 14:48:48,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5857 conditions, 2086 events. 1336/2086 cut-off events. For 2178/2178 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10079 event pairs, 450 based on Foata normal form. 6/2090 useless extension candidates. Maximal degree in co-relation 5838. Up to 1920 conditions per place. [2024-06-04 14:48:48,961 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-04 14:48:48,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 436 flow [2024-06-04 14:48:48,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:48:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:48:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-04 14:48:48,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 14:48:48,963 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 7 states and 154 transitions. [2024-06-04 14:48:48,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 436 flow [2024-06-04 14:48:48,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 408 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 14:48:48,966 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 217 flow [2024-06-04 14:48:48,966 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} [2024-06-04 14:48:48,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-04 14:48:48,967 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 217 flow [2024-06-04 14:48:48,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:48,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:48,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:48,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:48:48,968 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)] === [2024-06-04 14:48:48,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:48,968 INFO L85 PathProgramCache]: Analyzing trace with hash -760605331, now seen corresponding path program 1 times [2024-06-04 14:48:48,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:48,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024743630] [2024-06-04 14:48:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:48,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:49,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:49,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024743630] [2024-06-04 14:48:49,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024743630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:49,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:49,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:48:49,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902889838] [2024-06-04 14:48:49,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:49,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:48:49,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:49,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:48:49,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:48:49,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:48:49,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:49,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:49,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:48:49,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:49,973 INFO L124 PetriNetUnfolderBase]: 1326/2106 cut-off events. [2024-06-04 14:48:49,973 INFO L125 PetriNetUnfolderBase]: For 3261/3261 co-relation queries the response was YES. [2024-06-04 14:48:49,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6226 conditions, 2106 events. 1326/2106 cut-off events. For 3261/3261 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10265 event pairs, 517 based on Foata normal form. 4/2108 useless extension candidates. Maximal degree in co-relation 6206. Up to 1963 conditions per place. [2024-06-04 14:48:49,983 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-04 14:48:49,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 375 flow [2024-06-04 14:48:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:48:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:48:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-04 14:48:49,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-04 14:48:49,984 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 217 flow. Second operand 5 states and 97 transitions. [2024-06-04 14:48:49,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 375 flow [2024-06-04 14:48:49,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 61 transitions, 336 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:48:49,987 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-04 14:48:49,987 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} [2024-06-04 14:48:49,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-04 14:48:49,988 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-04 14:48:49,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:49,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:49,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:49,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:48:49,989 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)] === [2024-06-04 14:48:49,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:49,989 INFO L85 PathProgramCache]: Analyzing trace with hash -437286924, now seen corresponding path program 1 times [2024-06-04 14:48:49,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:49,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746451943] [2024-06-04 14:48:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:49,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:50,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:50,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746451943] [2024-06-04 14:48:50,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746451943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:50,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:50,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:48:50,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290902793] [2024-06-04 14:48:50,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:50,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:48:50,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:48:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:48:50,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:48:50,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:50,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:50,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:48:50,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:51,070 INFO L124 PetriNetUnfolderBase]: 1364/2156 cut-off events. [2024-06-04 14:48:51,070 INFO L125 PetriNetUnfolderBase]: For 4528/4528 co-relation queries the response was YES. [2024-06-04 14:48:51,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6832 conditions, 2156 events. 1364/2156 cut-off events. For 4528/4528 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10493 event pairs, 487 based on Foata normal form. 4/2157 useless extension candidates. Maximal degree in co-relation 6810. Up to 1970 conditions per place. [2024-06-04 14:48:51,080 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-04 14:48:51,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 80 transitions, 510 flow [2024-06-04 14:48:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:48:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:48:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-04 14:48:51,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-04 14:48:51,082 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 6 states and 122 transitions. [2024-06-04 14:48:51,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 80 transitions, 510 flow [2024-06-04 14:48:51,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 476 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 14:48:51,085 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 310 flow [2024-06-04 14:48:51,085 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=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-06-04 14:48:51,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-04 14:48:51,086 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 310 flow [2024-06-04 14:48:51,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:51,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:51,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:51,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:48:51,087 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)] === [2024-06-04 14:48:51,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:51,087 INFO L85 PathProgramCache]: Analyzing trace with hash -424567314, now seen corresponding path program 2 times [2024-06-04 14:48:51,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:51,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651722307] [2024-06-04 14:48:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:51,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:51,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:51,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651722307] [2024-06-04 14:48:51,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651722307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:51,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:51,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:48:51,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418601704] [2024-06-04 14:48:51,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:51,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:48:51,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:51,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:48:51,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:48:51,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:48:51,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:51,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:51,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:48:51,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:52,093 INFO L124 PetriNetUnfolderBase]: 1354/2145 cut-off events. [2024-06-04 14:48:52,093 INFO L125 PetriNetUnfolderBase]: For 6184/6184 co-relation queries the response was YES. [2024-06-04 14:48:52,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7445 conditions, 2145 events. 1354/2145 cut-off events. For 6184/6184 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10440 event pairs, 496 based on Foata normal form. 4/2147 useless extension candidates. Maximal degree in co-relation 7421. Up to 1995 conditions per place. [2024-06-04 14:48:52,111 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-04 14:48:52,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 74 transitions, 490 flow [2024-06-04 14:48:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:48:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:48:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-04 14:48:52,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 14:48:52,113 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 310 flow. Second operand 6 states and 114 transitions. [2024-06-04 14:48:52,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 74 transitions, 490 flow [2024-06-04 14:48:52,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 74 transitions, 462 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-04 14:48:52,120 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 312 flow [2024-06-04 14:48:52,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-04 14:48:52,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-04 14:48:52,121 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 312 flow [2024-06-04 14:48:52,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:52,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:52,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:52,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:48:52,122 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)] === [2024-06-04 14:48:52,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:52,123 INFO L85 PathProgramCache]: Analyzing trace with hash 877834162, now seen corresponding path program 1 times [2024-06-04 14:48:52,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:52,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527432077] [2024-06-04 14:48:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:52,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:52,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:52,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527432077] [2024-06-04 14:48:52,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527432077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:52,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:52,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:48:52,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022573151] [2024-06-04 14:48:52,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:52,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:48:52,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:52,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:48:52,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:48:53,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:48:53,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 312 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:53,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:53,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:48:53,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:53,485 INFO L124 PetriNetUnfolderBase]: 1376/2167 cut-off events. [2024-06-04 14:48:53,485 INFO L125 PetriNetUnfolderBase]: For 7393/7393 co-relation queries the response was YES. [2024-06-04 14:48:53,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7660 conditions, 2167 events. 1376/2167 cut-off events. For 7393/7393 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10507 event pairs, 489 based on Foata normal form. 4/2169 useless extension candidates. Maximal degree in co-relation 7633. Up to 2006 conditions per place. [2024-06-04 14:48:53,499 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 68 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-04 14:48:53,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 568 flow [2024-06-04 14:48:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:48:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:48:53,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-04 14:48:53,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-04 14:48:53,505 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 312 flow. Second operand 7 states and 137 transitions. [2024-06-04 14:48:53,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 568 flow [2024-06-04 14:48:53,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 87 transitions, 532 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 14:48:53,511 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 342 flow [2024-06-04 14:48:53,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-04 14:48:53,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-04 14:48:53,513 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 342 flow [2024-06-04 14:48:53,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:53,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:53,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:53,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:48:53,514 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)] === [2024-06-04 14:48:53,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:53,514 INFO L85 PathProgramCache]: Analyzing trace with hash -670991756, now seen corresponding path program 2 times [2024-06-04 14:48:53,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:53,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102747496] [2024-06-04 14:48:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:53,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:54,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:54,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102747496] [2024-06-04 14:48:54,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102747496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:54,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:54,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:48:54,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584483289] [2024-06-04 14:48:54,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:54,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:48:54,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:54,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:48:54,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:48:54,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:48:54,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 342 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:54,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:54,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:48:54,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:54,809 INFO L124 PetriNetUnfolderBase]: 1414/2221 cut-off events. [2024-06-04 14:48:54,809 INFO L125 PetriNetUnfolderBase]: For 9499/9499 co-relation queries the response was YES. [2024-06-04 14:48:54,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8402 conditions, 2221 events. 1414/2221 cut-off events. For 9499/9499 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10808 event pairs, 467 based on Foata normal form. 4/2222 useless extension candidates. Maximal degree in co-relation 8376. Up to 1964 conditions per place. [2024-06-04 14:48:54,821 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 63 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-04 14:48:54,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 94 transitions, 684 flow [2024-06-04 14:48:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:48:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:48:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-04 14:48:54,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-04 14:48:54,822 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 342 flow. Second operand 7 states and 142 transitions. [2024-06-04 14:48:54,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 94 transitions, 684 flow [2024-06-04 14:48:54,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 642 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 14:48:54,828 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 426 flow [2024-06-04 14:48:54,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-06-04 14:48:54,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-04 14:48:54,828 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 426 flow [2024-06-04 14:48:54,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:54,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:54,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:54,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:48:54,829 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)] === [2024-06-04 14:48:54,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:54,829 INFO L85 PathProgramCache]: Analyzing trace with hash -276683846, now seen corresponding path program 3 times [2024-06-04 14:48:54,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:54,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543632444] [2024-06-04 14:48:54,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:54,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:55,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:55,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543632444] [2024-06-04 14:48:55,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543632444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:55,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:55,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:48:55,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292561709] [2024-06-04 14:48:55,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:55,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:48:55,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:55,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:48:55,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:48:55,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:48:55,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 426 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:55,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:55,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:48:55,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:56,138 INFO L124 PetriNetUnfolderBase]: 1404/2210 cut-off events. [2024-06-04 14:48:56,138 INFO L125 PetriNetUnfolderBase]: For 11926/11926 co-relation queries the response was YES. [2024-06-04 14:48:56,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 2210 events. 1404/2210 cut-off events. For 11926/11926 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10754 event pairs, 491 based on Foata normal form. 4/2212 useless extension candidates. Maximal degree in co-relation 8805. Up to 2045 conditions per place. [2024-06-04 14:48:56,151 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 69 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-04 14:48:56,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 88 transitions, 648 flow [2024-06-04 14:48:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:48:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:48:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-04 14:48:56,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-04 14:48:56,152 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 426 flow. Second operand 7 states and 132 transitions. [2024-06-04 14:48:56,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 88 transitions, 648 flow [2024-06-04 14:48:56,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 592 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 14:48:56,165 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 406 flow [2024-06-04 14:48:56,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2024-06-04 14:48:56,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-04 14:48:56,166 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 406 flow [2024-06-04 14:48:56,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:56,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:56,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:56,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:48:56,167 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)] === [2024-06-04 14:48:56,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:56,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1055216596, now seen corresponding path program 1 times [2024-06-04 14:48:56,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:56,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632404264] [2024-06-04 14:48:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:56,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:57,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:57,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632404264] [2024-06-04 14:48:57,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632404264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:57,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:57,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:57,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836319136] [2024-06-04 14:48:57,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:57,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:57,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:57,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:57,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:57,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:48:57,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 406 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) [2024-06-04 14:48:57,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:57,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:48:57,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:57,870 INFO L124 PetriNetUnfolderBase]: 1710/2636 cut-off events. [2024-06-04 14:48:57,870 INFO L125 PetriNetUnfolderBase]: For 15801/15801 co-relation queries the response was YES. [2024-06-04 14:48:57,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10499 conditions, 2636 events. 1710/2636 cut-off events. For 15801/15801 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12433 event pairs, 617 based on Foata normal form. 4/2638 useless extension candidates. Maximal degree in co-relation 10470. Up to 2493 conditions per place. [2024-06-04 14:48:57,884 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 73 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-06-04 14:48:57,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 92 transitions, 679 flow [2024-06-04 14:48:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:48:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:48:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-04 14:48:57,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-04 14:48:57,886 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 406 flow. Second operand 7 states and 125 transitions. [2024-06-04 14:48:57,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 92 transitions, 679 flow [2024-06-04 14:48:57,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 630 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 14:48:57,896 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 451 flow [2024-06-04 14:48:57,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=451, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-06-04 14:48:57,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-04 14:48:57,896 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 451 flow [2024-06-04 14:48:57,897 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) [2024-06-04 14:48:57,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:57,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:57,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:48:57,897 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:57,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:57,897 INFO L85 PathProgramCache]: Analyzing trace with hash 378904292, now seen corresponding path program 1 times [2024-06-04 14:48:57,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:57,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817377405] [2024-06-04 14:48:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:57,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:58,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:58,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817377405] [2024-06-04 14:48:58,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817377405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:58,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:58,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:48:58,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547310453] [2024-06-04 14:48:58,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:58,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:48:58,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:58,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:48:58,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:48:58,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:48:58,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 451 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) [2024-06-04 14:48:58,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:58,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:48:58,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:58,918 INFO L124 PetriNetUnfolderBase]: 1799/2725 cut-off events. [2024-06-04 14:48:58,918 INFO L125 PetriNetUnfolderBase]: For 21039/21043 co-relation queries the response was YES. [2024-06-04 14:48:58,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11675 conditions, 2725 events. 1799/2725 cut-off events. For 21039/21043 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12709 event pairs, 723 based on Foata normal form. 5/2711 useless extension candidates. Maximal degree in co-relation 11644. Up to 2667 conditions per place. [2024-06-04 14:48:58,932 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 68 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-06-04 14:48:58,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 643 flow [2024-06-04 14:48:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:48:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:48:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-04 14:48:58,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-04 14:48:58,933 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 451 flow. Second operand 5 states and 88 transitions. [2024-06-04 14:48:58,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 643 flow [2024-06-04 14:48:58,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 598 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:48:58,950 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 454 flow [2024-06-04 14:48:58,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=454, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-04 14:48:58,951 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-04 14:48:58,951 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 454 flow [2024-06-04 14:48:58,951 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) [2024-06-04 14:48:58,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:58,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:58,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:48:58,952 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)] === [2024-06-04 14:48:58,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:58,952 INFO L85 PathProgramCache]: Analyzing trace with hash 496469163, now seen corresponding path program 1 times [2024-06-04 14:48:58,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:58,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393382872] [2024-06-04 14:48:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:58,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:59,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:59,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393382872] [2024-06-04 14:48:59,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393382872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:59,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:59,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:59,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012989640] [2024-06-04 14:48:59,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:59,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:59,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:59,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:59,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:59,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:48:59,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 454 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 14:48:59,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:59,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:48:59,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:00,624 INFO L124 PetriNetUnfolderBase]: 1737/2673 cut-off events. [2024-06-04 14:49:00,624 INFO L125 PetriNetUnfolderBase]: For 24230/24230 co-relation queries the response was YES. [2024-06-04 14:49:00,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11938 conditions, 2673 events. 1737/2673 cut-off events. For 24230/24230 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13145 event pairs, 616 based on Foata normal form. 4/2663 useless extension candidates. Maximal degree in co-relation 11906. Up to 2426 conditions per place. [2024-06-04 14:49:00,639 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 23 changer transitions 0/122 dead transitions. [2024-06-04 14:49:00,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 122 transitions, 906 flow [2024-06-04 14:49:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-04 14:49:00,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-04 14:49:00,641 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 454 flow. Second operand 9 states and 179 transitions. [2024-06-04 14:49:00,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 122 transitions, 906 flow [2024-06-04 14:49:00,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 122 transitions, 880 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:00,652 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 556 flow [2024-06-04 14:49:00,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=556, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-04 14:49:00,653 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-04 14:49:00,653 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 556 flow [2024-06-04 14:49:00,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 14:49:00,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:00,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:00,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:49:00,655 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)] === [2024-06-04 14:49:00,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:00,655 INFO L85 PathProgramCache]: Analyzing trace with hash 496559373, now seen corresponding path program 2 times [2024-06-04 14:49:00,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:00,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912039828] [2024-06-04 14:49:00,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:00,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:01,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:01,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912039828] [2024-06-04 14:49:01,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912039828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:01,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:01,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:01,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514576516] [2024-06-04 14:49:01,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:01,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:01,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:01,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:01,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:01,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:49:01,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 556 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 14:49:01,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:01,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:49:01,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:02,325 INFO L124 PetriNetUnfolderBase]: 1729/2663 cut-off events. [2024-06-04 14:49:02,325 INFO L125 PetriNetUnfolderBase]: For 28102/28106 co-relation queries the response was YES. [2024-06-04 14:49:02,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12503 conditions, 2663 events. 1729/2663 cut-off events. For 28102/28106 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13128 event pairs, 619 based on Foata normal form. 4/2652 useless extension candidates. Maximal degree in co-relation 12470. Up to 2453 conditions per place. [2024-06-04 14:49:02,339 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 88 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-04 14:49:02,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 848 flow [2024-06-04 14:49:02,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-04 14:49:02,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-04 14:49:02,340 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 556 flow. Second operand 8 states and 155 transitions. [2024-06-04 14:49:02,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 848 flow [2024-06-04 14:49:02,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 112 transitions, 778 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 14:49:02,355 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 528 flow [2024-06-04 14:49:02,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=528, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-06-04 14:49:02,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-04 14:49:02,355 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 528 flow [2024-06-04 14:49:02,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 14:49:02,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:02,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:02,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:49:02,356 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)] === [2024-06-04 14:49:02,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:02,356 INFO L85 PathProgramCache]: Analyzing trace with hash 500278443, now seen corresponding path program 3 times [2024-06-04 14:49:02,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:02,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42929319] [2024-06-04 14:49:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:02,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:03,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:03,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42929319] [2024-06-04 14:49:03,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42929319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:03,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:03,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:03,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034921162] [2024-06-04 14:49:03,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:03,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:03,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:03,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:03,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:03,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:49:03,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 528 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 14:49:03,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:03,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:49:03,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:04,013 INFO L124 PetriNetUnfolderBase]: 1753/2696 cut-off events. [2024-06-04 14:49:04,013 INFO L125 PetriNetUnfolderBase]: For 31703/31711 co-relation queries the response was YES. [2024-06-04 14:49:04,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12882 conditions, 2696 events. 1753/2696 cut-off events. For 31703/31711 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13326 event pairs, 582 based on Foata normal form. 4/2682 useless extension candidates. Maximal degree in co-relation 12847. Up to 2391 conditions per place. [2024-06-04 14:49:04,030 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 76 selfloop transitions, 31 changer transitions 0/114 dead transitions. [2024-06-04 14:49:04,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 114 transitions, 864 flow [2024-06-04 14:49:04,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-04 14:49:04,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-04 14:49:04,032 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 528 flow. Second operand 8 states and 158 transitions. [2024-06-04 14:49:04,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 114 transitions, 864 flow [2024-06-04 14:49:04,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 114 transitions, 822 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:49:04,048 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 602 flow [2024-06-04 14:49:04,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=602, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-06-04 14:49:04,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-04 14:49:04,049 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 602 flow [2024-06-04 14:49:04,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 14:49:04,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:04,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:04,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:49:04,050 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:04,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:04,050 INFO L85 PathProgramCache]: Analyzing trace with hash 12736397, now seen corresponding path program 4 times [2024-06-04 14:49:04,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:04,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251664848] [2024-06-04 14:49:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:04,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:04,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:04,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251664848] [2024-06-04 14:49:04,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251664848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:04,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:04,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:04,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300994791] [2024-06-04 14:49:04,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:04,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:04,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:04,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:04,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:05,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:49:05,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 602 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 14:49:05,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:05,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:49:05,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:05,593 INFO L124 PetriNetUnfolderBase]: 1762/2711 cut-off events. [2024-06-04 14:49:05,594 INFO L125 PetriNetUnfolderBase]: For 36233/36245 co-relation queries the response was YES. [2024-06-04 14:49:05,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13565 conditions, 2711 events. 1762/2711 cut-off events. For 36233/36245 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13398 event pairs, 623 based on Foata normal form. 4/2694 useless extension candidates. Maximal degree in co-relation 13529. Up to 2494 conditions per place. [2024-06-04 14:49:05,609 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 87 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2024-06-04 14:49:05,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 930 flow [2024-06-04 14:49:05,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 14:49:05,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-04 14:49:05,611 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 602 flow. Second operand 8 states and 150 transitions. [2024-06-04 14:49:05,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 930 flow [2024-06-04 14:49:05,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 113 transitions, 838 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:05,632 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 608 flow [2024-06-04 14:49:05,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=608, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2024-06-04 14:49:05,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-04 14:49:05,632 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 608 flow [2024-06-04 14:49:05,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 14:49:05,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:05,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:05,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:49:05,633 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)] === [2024-06-04 14:49:05,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:05,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1648292003, now seen corresponding path program 1 times [2024-06-04 14:49:05,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:05,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757162911] [2024-06-04 14:49:05,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:05,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:06,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:06,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757162911] [2024-06-04 14:49:06,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757162911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:06,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:06,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:06,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685712473] [2024-06-04 14:49:06,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:06,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:06,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:06,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:06,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:06,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:06,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 608 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) [2024-06-04 14:49:06,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:06,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:06,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:07,189 INFO L124 PetriNetUnfolderBase]: 1925/2923 cut-off events. [2024-06-04 14:49:07,189 INFO L125 PetriNetUnfolderBase]: For 41497/41497 co-relation queries the response was YES. [2024-06-04 14:49:07,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14888 conditions, 2923 events. 1925/2923 cut-off events. For 41497/41497 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13756 event pairs, 683 based on Foata normal form. 2/2921 useless extension candidates. Maximal degree in co-relation 14851. Up to 2753 conditions per place. [2024-06-04 14:49:07,205 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2024-06-04 14:49:07,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 113 transitions, 947 flow [2024-06-04 14:49:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:49:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:49:07,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-04 14:49:07,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:49:07,206 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 608 flow. Second operand 7 states and 126 transitions. [2024-06-04 14:49:07,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 113 transitions, 947 flow [2024-06-04 14:49:07,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 113 transitions, 867 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:07,231 INFO L231 Difference]: Finished difference. Result has 86 places, 93 transitions, 661 flow [2024-06-04 14:49:07,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=661, PETRI_PLACES=86, PETRI_TRANSITIONS=93} [2024-06-04 14:49:07,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-04 14:49:07,231 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 93 transitions, 661 flow [2024-06-04 14:49:07,232 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) [2024-06-04 14:49:07,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:07,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:07,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:49:07,232 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:07,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:07,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1098649674, now seen corresponding path program 1 times [2024-06-04 14:49:07,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:07,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458580940] [2024-06-04 14:49:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:07,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:07,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:07,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458580940] [2024-06-04 14:49:07,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458580940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:07,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:07,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:49:07,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265930697] [2024-06-04 14:49:07,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:07,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:49:07,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:07,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:49:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:49:07,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:07,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 93 transitions, 661 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) [2024-06-04 14:49:07,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:07,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:07,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:08,435 INFO L124 PetriNetUnfolderBase]: 1930/2914 cut-off events. [2024-06-04 14:49:08,436 INFO L125 PetriNetUnfolderBase]: For 46457/46475 co-relation queries the response was YES. [2024-06-04 14:49:08,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15244 conditions, 2914 events. 1930/2914 cut-off events. For 46457/46475 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13604 event pairs, 720 based on Foata normal form. 7/2898 useless extension candidates. Maximal degree in co-relation 15206. Up to 2830 conditions per place. [2024-06-04 14:49:08,452 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 87 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2024-06-04 14:49:08,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 107 transitions, 907 flow [2024-06-04 14:49:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:49:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:49:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-04 14:49:08,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-04 14:49:08,453 INFO L175 Difference]: Start difference. First operand has 86 places, 93 transitions, 661 flow. Second operand 6 states and 103 transitions. [2024-06-04 14:49:08,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 107 transitions, 907 flow [2024-06-04 14:49:08,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 107 transitions, 847 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 14:49:08,479 INFO L231 Difference]: Finished difference. Result has 87 places, 96 transitions, 659 flow [2024-06-04 14:49:08,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=659, PETRI_PLACES=87, PETRI_TRANSITIONS=96} [2024-06-04 14:49:08,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-04 14:49:08,479 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 96 transitions, 659 flow [2024-06-04 14:49:08,480 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) [2024-06-04 14:49:08,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:08,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:08,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:49:08,480 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)] === [2024-06-04 14:49:08,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:08,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1789384519, now seen corresponding path program 1 times [2024-06-04 14:49:08,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:08,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971652990] [2024-06-04 14:49:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:08,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:09,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:09,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971652990] [2024-06-04 14:49:09,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971652990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:09,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:09,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:09,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325606829] [2024-06-04 14:49:09,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:09,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:09,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:09,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:09,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:09,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:49:09,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 96 transitions, 659 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:09,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:09,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:49:09,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:10,394 INFO L124 PetriNetUnfolderBase]: 1986/3066 cut-off events. [2024-06-04 14:49:10,394 INFO L125 PetriNetUnfolderBase]: For 57492/57492 co-relation queries the response was YES. [2024-06-04 14:49:10,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16995 conditions, 3066 events. 1986/3066 cut-off events. For 57492/57492 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15610 event pairs, 509 based on Foata normal form. 16/3068 useless extension candidates. Maximal degree in co-relation 16956. Up to 2526 conditions per place. [2024-06-04 14:49:10,411 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 118 selfloop transitions, 26 changer transitions 0/151 dead transitions. [2024-06-04 14:49:10,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 151 transitions, 1247 flow [2024-06-04 14:49:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:49:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:49:10,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-04 14:49:10,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-04 14:49:10,413 INFO L175 Difference]: Start difference. First operand has 87 places, 96 transitions, 659 flow. Second operand 10 states and 201 transitions. [2024-06-04 14:49:10,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 151 transitions, 1247 flow [2024-06-04 14:49:10,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 151 transitions, 1211 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 14:49:10,440 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 739 flow [2024-06-04 14:49:10,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=739, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2024-06-04 14:49:10,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-04 14:49:10,440 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 739 flow [2024-06-04 14:49:10,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:10,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:10,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:10,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:49:10,441 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)] === [2024-06-04 14:49:10,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:10,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1671453659, now seen corresponding path program 2 times [2024-06-04 14:49:10,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:10,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162801751] [2024-06-04 14:49:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:10,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:11,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:11,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162801751] [2024-06-04 14:49:11,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162801751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:11,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:11,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:11,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609839833] [2024-06-04 14:49:11,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:11,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:11,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:11,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:11,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:11,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:49:11,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 739 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:11,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:11,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:49:11,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:12,671 INFO L124 PetriNetUnfolderBase]: 2015/3127 cut-off events. [2024-06-04 14:49:12,672 INFO L125 PetriNetUnfolderBase]: For 63758/63758 co-relation queries the response was YES. [2024-06-04 14:49:12,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17315 conditions, 3127 events. 2015/3127 cut-off events. For 63758/63758 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15992 event pairs, 613 based on Foata normal form. 36/3155 useless extension candidates. Maximal degree in co-relation 17275. Up to 2656 conditions per place. [2024-06-04 14:49:12,690 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 115 selfloop transitions, 25 changer transitions 0/147 dead transitions. [2024-06-04 14:49:12,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 147 transitions, 1203 flow [2024-06-04 14:49:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:49:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:49:12,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-04 14:49:12,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-04 14:49:12,692 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 739 flow. Second operand 10 states and 196 transitions. [2024-06-04 14:49:12,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 147 transitions, 1203 flow [2024-06-04 14:49:12,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 147 transitions, 1159 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:12,723 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 788 flow [2024-06-04 14:49:12,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=788, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2024-06-04 14:49:12,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-04 14:49:12,724 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 788 flow [2024-06-04 14:49:12,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:12,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:12,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:12,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:49:12,724 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)] === [2024-06-04 14:49:12,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1789726037, now seen corresponding path program 1 times [2024-06-04 14:49:12,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:12,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081414536] [2024-06-04 14:49:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:12,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:13,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:13,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081414536] [2024-06-04 14:49:13,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081414536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:13,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:13,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:13,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200562844] [2024-06-04 14:49:13,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:13,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:13,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:13,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:13,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:13,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:13,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 788 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) [2024-06-04 14:49:13,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:13,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:13,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:14,414 INFO L124 PetriNetUnfolderBase]: 2180/3336 cut-off events. [2024-06-04 14:49:14,415 INFO L125 PetriNetUnfolderBase]: For 64971/64973 co-relation queries the response was YES. [2024-06-04 14:49:14,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18548 conditions, 3336 events. 2180/3336 cut-off events. For 64971/64973 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16332 event pairs, 662 based on Foata normal form. 4/3333 useless extension candidates. Maximal degree in co-relation 18506. Up to 3098 conditions per place. [2024-06-04 14:49:14,433 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 103 selfloop transitions, 26 changer transitions 0/134 dead transitions. [2024-06-04 14:49:14,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 134 transitions, 1181 flow [2024-06-04 14:49:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 14:49:14,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-04 14:49:14,438 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 788 flow. Second operand 8 states and 149 transitions. [2024-06-04 14:49:14,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 134 transitions, 1181 flow [2024-06-04 14:49:14,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1130 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 14:49:14,475 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 861 flow [2024-06-04 14:49:14,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2024-06-04 14:49:14,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-04 14:49:14,476 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 861 flow [2024-06-04 14:49:14,476 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) [2024-06-04 14:49:14,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:14,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:14,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:49:14,476 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)] === [2024-06-04 14:49:14,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1789541339, now seen corresponding path program 3 times [2024-06-04 14:49:14,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:14,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50791906] [2024-06-04 14:49:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:14,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:15,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:15,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50791906] [2024-06-04 14:49:15,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50791906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:15,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:15,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:15,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857466639] [2024-06-04 14:49:15,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:15,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:15,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:15,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:49:15,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 861 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:15,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:15,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:49:15,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:16,253 INFO L124 PetriNetUnfolderBase]: 2129/3313 cut-off events. [2024-06-04 14:49:16,253 INFO L125 PetriNetUnfolderBase]: For 76214/76218 co-relation queries the response was YES. [2024-06-04 14:49:16,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19102 conditions, 3313 events. 2129/3313 cut-off events. For 76214/76218 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 17341 event pairs, 624 based on Foata normal form. 24/3325 useless extension candidates. Maximal degree in co-relation 19058. Up to 2814 conditions per place. [2024-06-04 14:49:16,273 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 101 selfloop transitions, 36 changer transitions 0/145 dead transitions. [2024-06-04 14:49:16,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 145 transitions, 1305 flow [2024-06-04 14:49:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-04 14:49:16,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-04 14:49:16,274 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 861 flow. Second operand 9 states and 179 transitions. [2024-06-04 14:49:16,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 145 transitions, 1305 flow [2024-06-04 14:49:16,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 145 transitions, 1222 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 14:49:16,304 INFO L231 Difference]: Finished difference. Result has 102 places, 105 transitions, 894 flow [2024-06-04 14:49:16,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=894, PETRI_PLACES=102, PETRI_TRANSITIONS=105} [2024-06-04 14:49:16,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-04 14:49:16,304 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 105 transitions, 894 flow [2024-06-04 14:49:16,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:16,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:16,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:16,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:49:16,305 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:16,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:16,305 INFO L85 PathProgramCache]: Analyzing trace with hash -945553371, now seen corresponding path program 1 times [2024-06-04 14:49:16,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:16,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448256274] [2024-06-04 14:49:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:16,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:16,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:16,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448256274] [2024-06-04 14:49:16,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448256274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:16,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:16,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:49:16,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229172967] [2024-06-04 14:49:16,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:16,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:49:16,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:16,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:49:16,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:49:16,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:16,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 105 transitions, 894 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) [2024-06-04 14:49:16,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:16,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:16,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:17,421 INFO L124 PetriNetUnfolderBase]: 2292/3510 cut-off events. [2024-06-04 14:49:17,421 INFO L125 PetriNetUnfolderBase]: For 80271/80289 co-relation queries the response was YES. [2024-06-04 14:49:17,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20430 conditions, 3510 events. 2292/3510 cut-off events. For 80271/80289 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17516 event pairs, 792 based on Foata normal form. 6/3491 useless extension candidates. Maximal degree in co-relation 20385. Up to 3383 conditions per place. [2024-06-04 14:49:17,442 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 98 selfloop transitions, 18 changer transitions 0/127 dead transitions. [2024-06-04 14:49:17,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 127 transitions, 1262 flow [2024-06-04 14:49:17,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:49:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:49:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-04 14:49:17,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-04 14:49:17,443 INFO L175 Difference]: Start difference. First operand has 102 places, 105 transitions, 894 flow. Second operand 6 states and 110 transitions. [2024-06-04 14:49:17,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 127 transitions, 1262 flow [2024-06-04 14:49:17,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 127 transitions, 1182 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 14:49:17,480 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 915 flow [2024-06-04 14:49:17,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=915, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-06-04 14:49:17,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-04 14:49:17,480 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 915 flow [2024-06-04 14:49:17,480 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) [2024-06-04 14:49:17,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:17,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:17,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:49:17,481 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)] === [2024-06-04 14:49:17,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:17,481 INFO L85 PathProgramCache]: Analyzing trace with hash 214424917, now seen corresponding path program 2 times [2024-06-04 14:49:17,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:17,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88680697] [2024-06-04 14:49:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:17,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:18,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:18,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88680697] [2024-06-04 14:49:18,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88680697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:18,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:18,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:18,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746824354] [2024-06-04 14:49:18,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:18,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:18,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:18,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:18,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:18,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:18,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 915 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) [2024-06-04 14:49:18,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:18,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:18,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:19,152 INFO L124 PetriNetUnfolderBase]: 2330/3573 cut-off events. [2024-06-04 14:49:19,152 INFO L125 PetriNetUnfolderBase]: For 85332/85342 co-relation queries the response was YES. [2024-06-04 14:49:19,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21039 conditions, 3573 events. 2330/3573 cut-off events. For 85332/85342 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 17794 event pairs, 735 based on Foata normal form. 4/3571 useless extension candidates. Maximal degree in co-relation 20993. Up to 3374 conditions per place. [2024-06-04 14:49:19,173 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 114 selfloop transitions, 21 changer transitions 0/142 dead transitions. [2024-06-04 14:49:19,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 142 transitions, 1320 flow [2024-06-04 14:49:19,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:19,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 14:49:19,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:49:19,174 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 915 flow. Second operand 8 states and 144 transitions. [2024-06-04 14:49:19,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 142 transitions, 1320 flow [2024-06-04 14:49:19,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 142 transitions, 1292 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-04 14:49:19,228 INFO L231 Difference]: Finished difference. Result has 108 places, 116 transitions, 1017 flow [2024-06-04 14:49:19,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1017, PETRI_PLACES=108, PETRI_TRANSITIONS=116} [2024-06-04 14:49:19,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-04 14:49:19,228 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 116 transitions, 1017 flow [2024-06-04 14:49:19,229 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) [2024-06-04 14:49:19,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:19,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:19,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:49:19,229 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)] === [2024-06-04 14:49:19,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1505597255, now seen corresponding path program 4 times [2024-06-04 14:49:19,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:19,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372662806] [2024-06-04 14:49:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:19,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:20,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:20,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372662806] [2024-06-04 14:49:20,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372662806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:20,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:20,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:20,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970059186] [2024-06-04 14:49:20,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:20,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:20,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:20,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:49:20,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 116 transitions, 1017 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:20,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:20,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:49:20,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:21,171 INFO L124 PetriNetUnfolderBase]: 2252/3522 cut-off events. [2024-06-04 14:49:21,171 INFO L125 PetriNetUnfolderBase]: For 98832/98842 co-relation queries the response was YES. [2024-06-04 14:49:21,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21337 conditions, 3522 events. 2252/3522 cut-off events. For 98832/98842 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18471 event pairs, 640 based on Foata normal form. 28/3539 useless extension candidates. Maximal degree in co-relation 21288. Up to 3070 conditions per place. [2024-06-04 14:49:21,192 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 117 selfloop transitions, 25 changer transitions 0/153 dead transitions. [2024-06-04 14:49:21,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 153 transitions, 1465 flow [2024-06-04 14:49:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:21,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 14:49:21,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 14:49:21,194 INFO L175 Difference]: Start difference. First operand has 108 places, 116 transitions, 1017 flow. Second operand 9 states and 171 transitions. [2024-06-04 14:49:21,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 153 transitions, 1465 flow [2024-06-04 14:49:21,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 153 transitions, 1378 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 14:49:21,259 INFO L231 Difference]: Finished difference. Result has 112 places, 117 transitions, 1028 flow [2024-06-04 14:49:21,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1028, PETRI_PLACES=112, PETRI_TRANSITIONS=117} [2024-06-04 14:49:21,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-04 14:49:21,260 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 117 transitions, 1028 flow [2024-06-04 14:49:21,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:21,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:21,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:21,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:49:21,260 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)] === [2024-06-04 14:49:21,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:21,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1541798159, now seen corresponding path program 3 times [2024-06-04 14:49:21,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:21,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705138800] [2024-06-04 14:49:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:21,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:22,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:22,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705138800] [2024-06-04 14:49:22,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705138800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:22,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:22,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:22,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731023108] [2024-06-04 14:49:22,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:22,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:22,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:22,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:22,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:22,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:22,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 117 transitions, 1028 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) [2024-06-04 14:49:22,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:22,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:22,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:23,089 INFO L124 PetriNetUnfolderBase]: 2406/3701 cut-off events. [2024-06-04 14:49:23,090 INFO L125 PetriNetUnfolderBase]: For 101153/101163 co-relation queries the response was YES. [2024-06-04 14:49:23,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22647 conditions, 3701 events. 2406/3701 cut-off events. For 101153/101163 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18702 event pairs, 749 based on Foata normal form. 4/3699 useless extension candidates. Maximal degree in co-relation 22597. Up to 3506 conditions per place. [2024-06-04 14:49:23,109 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 116 selfloop transitions, 21 changer transitions 0/144 dead transitions. [2024-06-04 14:49:23,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 144 transitions, 1416 flow [2024-06-04 14:49:23,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 14:49:23,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-04 14:49:23,110 INFO L175 Difference]: Start difference. First operand has 112 places, 117 transitions, 1028 flow. Second operand 8 states and 142 transitions. [2024-06-04 14:49:23,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 144 transitions, 1416 flow [2024-06-04 14:49:23,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 144 transitions, 1354 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 14:49:23,178 INFO L231 Difference]: Finished difference. Result has 113 places, 119 transitions, 1070 flow [2024-06-04 14:49:23,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1070, PETRI_PLACES=113, PETRI_TRANSITIONS=119} [2024-06-04 14:49:23,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-04 14:49:23,178 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 119 transitions, 1070 flow [2024-06-04 14:49:23,178 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) [2024-06-04 14:49:23,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:23,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:23,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:49:23,179 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:23,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:23,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1030125855, now seen corresponding path program 1 times [2024-06-04 14:49:23,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:23,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253888692] [2024-06-04 14:49:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:23,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:24,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:24,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253888692] [2024-06-04 14:49:24,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253888692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:24,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:24,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:24,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807701459] [2024-06-04 14:49:24,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:24,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:24,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:24,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:24,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:24,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:24,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 119 transitions, 1070 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) [2024-06-04 14:49:24,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:24,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:24,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:24,962 INFO L124 PetriNetUnfolderBase]: 2416/3719 cut-off events. [2024-06-04 14:49:24,962 INFO L125 PetriNetUnfolderBase]: For 103392/103392 co-relation queries the response was YES. [2024-06-04 14:49:24,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22740 conditions, 3719 events. 2416/3719 cut-off events. For 103392/103392 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18829 event pairs, 724 based on Foata normal form. 2/3719 useless extension candidates. Maximal degree in co-relation 22689. Up to 3511 conditions per place. [2024-06-04 14:49:24,988 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 117 selfloop transitions, 27 changer transitions 0/151 dead transitions. [2024-06-04 14:49:24,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 151 transitions, 1523 flow [2024-06-04 14:49:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:24,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 14:49:24,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:49:24,990 INFO L175 Difference]: Start difference. First operand has 113 places, 119 transitions, 1070 flow. Second operand 9 states and 153 transitions. [2024-06-04 14:49:24,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 151 transitions, 1523 flow [2024-06-04 14:49:25,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 151 transitions, 1437 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:25,054 INFO L231 Difference]: Finished difference. Result has 117 places, 127 transitions, 1168 flow [2024-06-04 14:49:25,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1168, PETRI_PLACES=117, PETRI_TRANSITIONS=127} [2024-06-04 14:49:25,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-04 14:49:25,054 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 127 transitions, 1168 flow [2024-06-04 14:49:25,054 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) [2024-06-04 14:49:25,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:25,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:25,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:49:25,054 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)] === [2024-06-04 14:49:25,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:25,055 INFO L85 PathProgramCache]: Analyzing trace with hash 450896947, now seen corresponding path program 4 times [2024-06-04 14:49:25,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:25,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237097522] [2024-06-04 14:49:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:25,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:26,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:26,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237097522] [2024-06-04 14:49:26,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237097522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:26,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:26,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:26,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077950363] [2024-06-04 14:49:26,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:26,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:26,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:26,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:26,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:26,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:26,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 127 transitions, 1168 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) [2024-06-04 14:49:26,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:26,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:26,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:26,799 INFO L124 PetriNetUnfolderBase]: 2408/3707 cut-off events. [2024-06-04 14:49:26,799 INFO L125 PetriNetUnfolderBase]: For 110060/110060 co-relation queries the response was YES. [2024-06-04 14:49:26,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23114 conditions, 3707 events. 2408/3707 cut-off events. For 110060/110060 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18697 event pairs, 726 based on Foata normal form. 4/3709 useless extension candidates. Maximal degree in co-relation 23061. Up to 3517 conditions per place. [2024-06-04 14:49:26,825 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 128 selfloop transitions, 18 changer transitions 0/153 dead transitions. [2024-06-04 14:49:26,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 153 transitions, 1576 flow [2024-06-04 14:49:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 14:49:26,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-04 14:49:26,826 INFO L175 Difference]: Start difference. First operand has 117 places, 127 transitions, 1168 flow. Second operand 8 states and 141 transitions. [2024-06-04 14:49:26,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 153 transitions, 1576 flow [2024-06-04 14:49:26,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 153 transitions, 1474 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:26,893 INFO L231 Difference]: Finished difference. Result has 119 places, 129 transitions, 1169 flow [2024-06-04 14:49:26,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1169, PETRI_PLACES=119, PETRI_TRANSITIONS=129} [2024-06-04 14:49:26,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-04 14:49:26,894 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 129 transitions, 1169 flow [2024-06-04 14:49:26,894 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) [2024-06-04 14:49:26,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:26,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:26,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:49:26,895 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:26,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:26,895 INFO L85 PathProgramCache]: Analyzing trace with hash -945167421, now seen corresponding path program 2 times [2024-06-04 14:49:26,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:26,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603248036] [2024-06-04 14:49:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:26,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:27,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:27,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603248036] [2024-06-04 14:49:27,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603248036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:27,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:27,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:49:27,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290952141] [2024-06-04 14:49:27,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:27,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:49:27,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:27,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:49:27,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:49:27,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:27,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 129 transitions, 1169 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) [2024-06-04 14:49:27,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:27,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:27,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:28,093 INFO L124 PetriNetUnfolderBase]: 2378/3665 cut-off events. [2024-06-04 14:49:28,094 INFO L125 PetriNetUnfolderBase]: For 115198/115205 co-relation queries the response was YES. [2024-06-04 14:49:28,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23072 conditions, 3665 events. 2378/3665 cut-off events. For 115198/115205 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18627 event pairs, 777 based on Foata normal form. 4/3651 useless extension candidates. Maximal degree in co-relation 23018. Up to 3546 conditions per place. [2024-06-04 14:49:28,120 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 110 selfloop transitions, 12 changer transitions 0/137 dead transitions. [2024-06-04 14:49:28,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 137 transitions, 1433 flow [2024-06-04 14:49:28,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:49:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:49:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-04 14:49:28,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-04 14:49:28,121 INFO L175 Difference]: Start difference. First operand has 119 places, 129 transitions, 1169 flow. Second operand 6 states and 101 transitions. [2024-06-04 14:49:28,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 137 transitions, 1433 flow [2024-06-04 14:49:28,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 137 transitions, 1334 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:28,239 INFO L231 Difference]: Finished difference. Result has 119 places, 129 transitions, 1100 flow [2024-06-04 14:49:28,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1100, PETRI_PLACES=119, PETRI_TRANSITIONS=129} [2024-06-04 14:49:28,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-04 14:49:28,240 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 129 transitions, 1100 flow [2024-06-04 14:49:28,240 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) [2024-06-04 14:49:28,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:28,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:28,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:49:28,241 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:28,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash -950875389, now seen corresponding path program 1 times [2024-06-04 14:49:28,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:28,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701889957] [2024-06-04 14:49:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:28,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:28,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:28,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701889957] [2024-06-04 14:49:28,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701889957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:28,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:28,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:49:28,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584846650] [2024-06-04 14:49:28,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:28,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:49:28,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:28,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:49:28,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:49:28,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:49:28,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 129 transitions, 1100 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) [2024-06-04 14:49:28,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:28,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:49:28,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:29,591 INFO L124 PetriNetUnfolderBase]: 2529/3828 cut-off events. [2024-06-04 14:49:29,592 INFO L125 PetriNetUnfolderBase]: For 119339/119339 co-relation queries the response was YES. [2024-06-04 14:49:29,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23993 conditions, 3828 events. 2529/3828 cut-off events. For 119339/119339 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18803 event pairs, 792 based on Foata normal form. 1/3827 useless extension candidates. Maximal degree in co-relation 23938. Up to 3796 conditions per place. [2024-06-04 14:49:29,619 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 127 selfloop transitions, 17 changer transitions 0/147 dead transitions. [2024-06-04 14:49:29,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 147 transitions, 1528 flow [2024-06-04 14:49:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:49:29,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:49:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-04 14:49:29,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:49:29,620 INFO L175 Difference]: Start difference. First operand has 119 places, 129 transitions, 1100 flow. Second operand 6 states and 102 transitions. [2024-06-04 14:49:29,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 147 transitions, 1528 flow [2024-06-04 14:49:29,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 147 transitions, 1491 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 14:49:29,726 INFO L231 Difference]: Finished difference. Result has 120 places, 135 transitions, 1161 flow [2024-06-04 14:49:29,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1161, PETRI_PLACES=120, PETRI_TRANSITIONS=135} [2024-06-04 14:49:29,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-04 14:49:29,726 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 135 transitions, 1161 flow [2024-06-04 14:49:29,727 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) [2024-06-04 14:49:29,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:29,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:29,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:49:29,727 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:29,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:29,727 INFO L85 PathProgramCache]: Analyzing trace with hash 342703461, now seen corresponding path program 2 times [2024-06-04 14:49:29,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:29,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697358503] [2024-06-04 14:49:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:29,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:30,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:30,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697358503] [2024-06-04 14:49:30,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697358503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:30,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:30,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:49:30,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816357039] [2024-06-04 14:49:30,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:30,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:49:30,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:30,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:49:30,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:49:30,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:49:30,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 135 transitions, 1161 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) [2024-06-04 14:49:30,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:30,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:49:30,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:31,030 INFO L124 PetriNetUnfolderBase]: 2526/3825 cut-off events. [2024-06-04 14:49:31,030 INFO L125 PetriNetUnfolderBase]: For 126543/126545 co-relation queries the response was YES. [2024-06-04 14:49:31,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24539 conditions, 3825 events. 2526/3825 cut-off events. For 126543/126545 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18832 event pairs, 795 based on Foata normal form. 3/3826 useless extension candidates. Maximal degree in co-relation 24483. Up to 3793 conditions per place. [2024-06-04 14:49:31,057 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 123 selfloop transitions, 17 changer transitions 0/143 dead transitions. [2024-06-04 14:49:31,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 143 transitions, 1461 flow [2024-06-04 14:49:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:49:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:49:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-04 14:49:31,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-04 14:49:31,058 INFO L175 Difference]: Start difference. First operand has 120 places, 135 transitions, 1161 flow. Second operand 6 states and 98 transitions. [2024-06-04 14:49:31,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 143 transitions, 1461 flow [2024-06-04 14:49:31,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 143 transitions, 1414 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-04 14:49:31,138 INFO L231 Difference]: Finished difference. Result has 124 places, 135 transitions, 1154 flow [2024-06-04 14:49:31,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1154, PETRI_PLACES=124, PETRI_TRANSITIONS=135} [2024-06-04 14:49:31,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-04 14:49:31,139 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 135 transitions, 1154 flow [2024-06-04 14:49:31,139 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) [2024-06-04 14:49:31,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:31,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:31,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:49:31,139 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)] === [2024-06-04 14:49:31,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:31,140 INFO L85 PathProgramCache]: Analyzing trace with hash -353066701, now seen corresponding path program 1 times [2024-06-04 14:49:31,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:31,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114553721] [2024-06-04 14:49:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:31,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:32,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:32,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114553721] [2024-06-04 14:49:32,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114553721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:32,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:32,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:49:32,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489586752] [2024-06-04 14:49:32,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:32,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:49:32,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:32,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:49:32,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:49:32,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:32,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 135 transitions, 1154 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:32,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:32,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:32,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:32,995 INFO L124 PetriNetUnfolderBase]: 2440/3749 cut-off events. [2024-06-04 14:49:32,995 INFO L125 PetriNetUnfolderBase]: For 136615/136617 co-relation queries the response was YES. [2024-06-04 14:49:33,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24299 conditions, 3749 events. 2440/3749 cut-off events. For 136615/136617 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18971 event pairs, 638 based on Foata normal form. 4/3743 useless extension candidates. Maximal degree in co-relation 24241. Up to 3310 conditions per place. [2024-06-04 14:49:33,023 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 122 selfloop transitions, 48 changer transitions 0/179 dead transitions. [2024-06-04 14:49:33,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 179 transitions, 1744 flow [2024-06-04 14:49:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 14:49:33,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-04 14:49:33,024 INFO L175 Difference]: Start difference. First operand has 124 places, 135 transitions, 1154 flow. Second operand 9 states and 169 transitions. [2024-06-04 14:49:33,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 179 transitions, 1744 flow [2024-06-04 14:49:33,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 179 transitions, 1698 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:33,129 INFO L231 Difference]: Finished difference. Result has 129 places, 145 transitions, 1392 flow [2024-06-04 14:49:33,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1392, PETRI_PLACES=129, PETRI_TRANSITIONS=145} [2024-06-04 14:49:33,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-04 14:49:33,129 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 145 transitions, 1392 flow [2024-06-04 14:49:33,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:33,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:33,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:33,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:49:33,130 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:33,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:33,130 INFO L85 PathProgramCache]: Analyzing trace with hash 410319293, now seen corresponding path program 1 times [2024-06-04 14:49:33,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:33,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652663290] [2024-06-04 14:49:33,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:33,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:33,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:33,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652663290] [2024-06-04 14:49:33,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652663290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:33,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:33,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:49:33,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843539143] [2024-06-04 14:49:33,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:33,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:49:33,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:33,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:49:33,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:49:33,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:33,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 145 transitions, 1392 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) [2024-06-04 14:49:33,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:33,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:33,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:34,491 INFO L124 PetriNetUnfolderBase]: 2426/3737 cut-off events. [2024-06-04 14:49:34,491 INFO L125 PetriNetUnfolderBase]: For 149947/149978 co-relation queries the response was YES. [2024-06-04 14:49:34,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25241 conditions, 3737 events. 2426/3737 cut-off events. For 149947/149978 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19041 event pairs, 737 based on Foata normal form. 8/3717 useless extension candidates. Maximal degree in co-relation 25181. Up to 3549 conditions per place. [2024-06-04 14:49:34,514 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 133 selfloop transitions, 26 changer transitions 0/174 dead transitions. [2024-06-04 14:49:34,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 174 transitions, 1902 flow [2024-06-04 14:49:34,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:49:34,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:49:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-04 14:49:34,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-04 14:49:34,516 INFO L175 Difference]: Start difference. First operand has 129 places, 145 transitions, 1392 flow. Second operand 7 states and 129 transitions. [2024-06-04 14:49:34,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 174 transitions, 1902 flow [2024-06-04 14:49:34,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 174 transitions, 1759 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:34,641 INFO L231 Difference]: Finished difference. Result has 134 places, 154 transitions, 1406 flow [2024-06-04 14:49:34,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1406, PETRI_PLACES=134, PETRI_TRANSITIONS=154} [2024-06-04 14:49:34,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-04 14:49:34,641 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 154 transitions, 1406 flow [2024-06-04 14:49:34,641 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) [2024-06-04 14:49:34,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:34,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:34,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:49:34,642 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)] === [2024-06-04 14:49:34,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:34,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1083707699, now seen corresponding path program 2 times [2024-06-04 14:49:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:34,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784149081] [2024-06-04 14:49:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:34,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:35,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:35,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784149081] [2024-06-04 14:49:35,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784149081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:35,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:35,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:49:35,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477671597] [2024-06-04 14:49:35,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:35,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:49:35,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:35,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:49:35,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:49:35,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:35,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 154 transitions, 1406 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:35,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:35,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:35,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:36,727 INFO L124 PetriNetUnfolderBase]: 2554/3920 cut-off events. [2024-06-04 14:49:36,727 INFO L125 PetriNetUnfolderBase]: For 159173/159173 co-relation queries the response was YES. [2024-06-04 14:49:36,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26831 conditions, 3920 events. 2554/3920 cut-off events. For 159173/159173 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19926 event pairs, 746 based on Foata normal form. 4/3922 useless extension candidates. Maximal degree in co-relation 26768. Up to 3625 conditions per place. [2024-06-04 14:49:36,757 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 150 selfloop transitions, 31 changer transitions 0/190 dead transitions. [2024-06-04 14:49:36,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 190 transitions, 2116 flow [2024-06-04 14:49:36,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 14:49:36,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:49:36,759 INFO L175 Difference]: Start difference. First operand has 134 places, 154 transitions, 1406 flow. Second operand 9 states and 162 transitions. [2024-06-04 14:49:36,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 190 transitions, 2116 flow [2024-06-04 14:49:36,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 190 transitions, 2077 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-04 14:49:36,879 INFO L231 Difference]: Finished difference. Result has 142 places, 159 transitions, 1603 flow [2024-06-04 14:49:36,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1603, PETRI_PLACES=142, PETRI_TRANSITIONS=159} [2024-06-04 14:49:36,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-04 14:49:36,879 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 159 transitions, 1603 flow [2024-06-04 14:49:36,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:36,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:36,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:36,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:49:36,879 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)] === [2024-06-04 14:49:36,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:36,880 INFO L85 PathProgramCache]: Analyzing trace with hash 576851989, now seen corresponding path program 3 times [2024-06-04 14:49:36,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:36,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88384631] [2024-06-04 14:49:36,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:36,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:37,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:37,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88384631] [2024-06-04 14:49:37,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88384631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:37,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:37,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:49:37,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040358739] [2024-06-04 14:49:37,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:37,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:49:37,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:37,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:49:37,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:49:38,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:38,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 159 transitions, 1603 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:38,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:38,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:38,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:38,904 INFO L124 PetriNetUnfolderBase]: 2571/3947 cut-off events. [2024-06-04 14:49:38,904 INFO L125 PetriNetUnfolderBase]: For 169892/169892 co-relation queries the response was YES. [2024-06-04 14:49:38,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27548 conditions, 3947 events. 2571/3947 cut-off events. For 169892/169892 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20082 event pairs, 741 based on Foata normal form. 4/3949 useless extension candidates. Maximal degree in co-relation 27481. Up to 3644 conditions per place. [2024-06-04 14:49:38,932 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 155 selfloop transitions, 32 changer transitions 0/196 dead transitions. [2024-06-04 14:49:38,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 196 transitions, 2193 flow [2024-06-04 14:49:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:38,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 14:49:38,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-04 14:49:38,933 INFO L175 Difference]: Start difference. First operand has 142 places, 159 transitions, 1603 flow. Second operand 9 states and 163 transitions. [2024-06-04 14:49:38,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 196 transitions, 2193 flow [2024-06-04 14:49:39,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 196 transitions, 2082 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-04 14:49:39,036 INFO L231 Difference]: Finished difference. Result has 148 places, 166 transitions, 1727 flow [2024-06-04 14:49:39,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1727, PETRI_PLACES=148, PETRI_TRANSITIONS=166} [2024-06-04 14:49:39,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-04 14:49:39,037 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 166 transitions, 1727 flow [2024-06-04 14:49:39,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:39,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:39,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:39,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:49:39,037 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)] === [2024-06-04 14:49:39,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:39,037 INFO L85 PathProgramCache]: Analyzing trace with hash 551096233, now seen corresponding path program 4 times [2024-06-04 14:49:39,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:39,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242573206] [2024-06-04 14:49:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:39,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:40,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:40,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242573206] [2024-06-04 14:49:40,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242573206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:40,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:40,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:49:40,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702079725] [2024-06-04 14:49:40,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:40,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:49:40,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:40,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:49:40,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:49:40,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:40,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 166 transitions, 1727 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:40,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:40,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:40,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:41,039 INFO L124 PetriNetUnfolderBase]: 2563/3935 cut-off events. [2024-06-04 14:49:41,039 INFO L125 PetriNetUnfolderBase]: For 176512/176512 co-relation queries the response was YES. [2024-06-04 14:49:41,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27843 conditions, 3935 events. 2563/3935 cut-off events. For 176512/176512 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20039 event pairs, 739 based on Foata normal form. 4/3937 useless extension candidates. Maximal degree in co-relation 27772. Up to 3692 conditions per place. [2024-06-04 14:49:41,072 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 29 changer transitions 0/195 dead transitions. [2024-06-04 14:49:41,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 195 transitions, 2175 flow [2024-06-04 14:49:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:41,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 14:49:41,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-04 14:49:41,073 INFO L175 Difference]: Start difference. First operand has 148 places, 166 transitions, 1727 flow. Second operand 9 states and 159 transitions. [2024-06-04 14:49:41,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 195 transitions, 2175 flow [2024-06-04 14:49:41,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 195 transitions, 1994 flow, removed 84 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:41,246 INFO L231 Difference]: Finished difference. Result has 154 places, 166 transitions, 1613 flow [2024-06-04 14:49:41,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1613, PETRI_PLACES=154, PETRI_TRANSITIONS=166} [2024-06-04 14:49:41,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-04 14:49:41,246 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 166 transitions, 1613 flow [2024-06-04 14:49:41,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:41,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:41,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:41,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:49:41,247 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)] === [2024-06-04 14:49:41,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:41,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1083700042, now seen corresponding path program 1 times [2024-06-04 14:49:41,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:41,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062020463] [2024-06-04 14:49:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:41,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:42,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:42,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062020463] [2024-06-04 14:49:42,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062020463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:42,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:42,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:49:42,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725455733] [2024-06-04 14:49:42,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:42,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:49:42,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:42,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:49:42,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:49:42,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:42,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 166 transitions, 1613 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:42,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:42,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:42,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:43,631 INFO L124 PetriNetUnfolderBase]: 2580/3960 cut-off events. [2024-06-04 14:49:43,631 INFO L125 PetriNetUnfolderBase]: For 179194/179194 co-relation queries the response was YES. [2024-06-04 14:49:43,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27566 conditions, 3960 events. 2580/3960 cut-off events. For 179194/179194 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20148 event pairs, 737 based on Foata normal form. 2/3960 useless extension candidates. Maximal degree in co-relation 27493. Up to 3721 conditions per place. [2024-06-04 14:49:43,663 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 160 selfloop transitions, 32 changer transitions 0/201 dead transitions. [2024-06-04 14:49:43,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 201 transitions, 2173 flow [2024-06-04 14:49:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 14:49:43,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-04 14:49:43,665 INFO L175 Difference]: Start difference. First operand has 154 places, 166 transitions, 1613 flow. Second operand 9 states and 160 transitions. [2024-06-04 14:49:43,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 201 transitions, 2173 flow [2024-06-04 14:49:43,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 201 transitions, 2107 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 14:49:43,784 INFO L231 Difference]: Finished difference. Result has 155 places, 172 transitions, 1733 flow [2024-06-04 14:49:43,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1733, PETRI_PLACES=155, PETRI_TRANSITIONS=172} [2024-06-04 14:49:43,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-04 14:49:43,784 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 172 transitions, 1733 flow [2024-06-04 14:49:43,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:43,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:43,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:43,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:49:43,785 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:43,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:43,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1741412445, now seen corresponding path program 5 times [2024-06-04 14:49:43,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:43,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505430936] [2024-06-04 14:49:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:43,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:44,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:44,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505430936] [2024-06-04 14:49:44,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505430936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:44,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:44,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:49:44,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262095407] [2024-06-04 14:49:44,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:44,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:49:44,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:44,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:49:44,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:49:44,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:44,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 172 transitions, 1733 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:44,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:44,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:44,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:45,773 INFO L124 PetriNetUnfolderBase]: 2572/3948 cut-off events. [2024-06-04 14:49:45,773 INFO L125 PetriNetUnfolderBase]: For 187938/187938 co-relation queries the response was YES. [2024-06-04 14:49:45,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27906 conditions, 3948 events. 2572/3948 cut-off events. For 187938/187938 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20014 event pairs, 709 based on Foata normal form. 4/3950 useless extension candidates. Maximal degree in co-relation 27832. Up to 3736 conditions per place. [2024-06-04 14:49:45,800 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 174 selfloop transitions, 20 changer transitions 0/203 dead transitions. [2024-06-04 14:49:45,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 203 transitions, 2267 flow [2024-06-04 14:49:45,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:45,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:45,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 14:49:45,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 14:49:45,801 INFO L175 Difference]: Start difference. First operand has 155 places, 172 transitions, 1733 flow. Second operand 9 states and 157 transitions. [2024-06-04 14:49:45,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 203 transitions, 2267 flow [2024-06-04 14:49:45,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 203 transitions, 2141 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-04 14:49:45,948 INFO L231 Difference]: Finished difference. Result has 157 places, 174 transitions, 1732 flow [2024-06-04 14:49:45,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1732, PETRI_PLACES=157, PETRI_TRANSITIONS=174} [2024-06-04 14:49:45,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-04 14:49:45,949 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 174 transitions, 1732 flow [2024-06-04 14:49:45,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:45,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:45,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:45,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:49:45,950 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:45,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:45,950 INFO L85 PathProgramCache]: Analyzing trace with hash 759646229, now seen corresponding path program 2 times [2024-06-04 14:49:45,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:45,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404856824] [2024-06-04 14:49:45,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:45,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:46,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:46,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404856824] [2024-06-04 14:49:46,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404856824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:46,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:46,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:49:46,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28832834] [2024-06-04 14:49:46,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:46,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:49:46,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:46,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:49:46,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:49:46,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:46,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 174 transitions, 1732 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) [2024-06-04 14:49:46,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:46,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:46,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:47,317 INFO L124 PetriNetUnfolderBase]: 2488/3839 cut-off events. [2024-06-04 14:49:47,317 INFO L125 PetriNetUnfolderBase]: For 198878/198933 co-relation queries the response was YES. [2024-06-04 14:49:47,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27545 conditions, 3839 events. 2488/3839 cut-off events. For 198878/198933 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19717 event pairs, 745 based on Foata normal form. 6/3811 useless extension candidates. Maximal degree in co-relation 27470. Up to 3704 conditions per place. [2024-06-04 14:49:47,350 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 158 selfloop transitions, 15 changer transitions 0/188 dead transitions. [2024-06-04 14:49:47,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 188 transitions, 2146 flow [2024-06-04 14:49:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:49:47,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:49:47,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 14:49:47,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-04 14:49:47,351 INFO L175 Difference]: Start difference. First operand has 157 places, 174 transitions, 1732 flow. Second operand 7 states and 116 transitions. [2024-06-04 14:49:47,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 188 transitions, 2146 flow [2024-06-04 14:49:47,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 188 transitions, 2039 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-04 14:49:47,513 INFO L231 Difference]: Finished difference. Result has 157 places, 177 transitions, 1707 flow [2024-06-04 14:49:47,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1707, PETRI_PLACES=157, PETRI_TRANSITIONS=177} [2024-06-04 14:49:47,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-04 14:49:47,513 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 177 transitions, 1707 flow [2024-06-04 14:49:47,513 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) [2024-06-04 14:49:47,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:47,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:47,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:49:47,514 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:47,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:47,514 INFO L85 PathProgramCache]: Analyzing trace with hash 764582333, now seen corresponding path program 3 times [2024-06-04 14:49:47,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:47,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401922771] [2024-06-04 14:49:47,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:47,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:48,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:48,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401922771] [2024-06-04 14:49:48,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401922771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:48,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:48,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:49:48,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500016671] [2024-06-04 14:49:48,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:48,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:49:48,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:48,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:49:48,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:49:48,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:49:48,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 177 transitions, 1707 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) [2024-06-04 14:49:48,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:48,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:49:48,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:48,899 INFO L124 PetriNetUnfolderBase]: 2476/3821 cut-off events. [2024-06-04 14:49:48,899 INFO L125 PetriNetUnfolderBase]: For 201382/201421 co-relation queries the response was YES. [2024-06-04 14:49:48,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27231 conditions, 3821 events. 2476/3821 cut-off events. For 201382/201421 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19606 event pairs, 735 based on Foata normal form. 5/3795 useless extension candidates. Maximal degree in co-relation 27155. Up to 3677 conditions per place. [2024-06-04 14:49:48,934 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 155 selfloop transitions, 20 changer transitions 0/190 dead transitions. [2024-06-04 14:49:48,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 190 transitions, 2091 flow [2024-06-04 14:49:48,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:49:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:49:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-04 14:49:48,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-04 14:49:48,935 INFO L175 Difference]: Start difference. First operand has 157 places, 177 transitions, 1707 flow. Second operand 7 states and 120 transitions. [2024-06-04 14:49:48,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 190 transitions, 2091 flow [2024-06-04 14:49:49,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 190 transitions, 2016 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 14:49:49,079 INFO L231 Difference]: Finished difference. Result has 159 places, 177 transitions, 1678 flow [2024-06-04 14:49:49,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1678, PETRI_PLACES=159, PETRI_TRANSITIONS=177} [2024-06-04 14:49:49,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-04 14:49:49,080 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 177 transitions, 1678 flow [2024-06-04 14:49:49,080 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) [2024-06-04 14:49:49,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:49,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:49,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:49:49,081 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:49,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:49,081 INFO L85 PathProgramCache]: Analyzing trace with hash 794878945, now seen corresponding path program 1 times [2024-06-04 14:49:49,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:49,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029033409] [2024-06-04 14:49:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:49,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:49,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:49,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029033409] [2024-06-04 14:49:49,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029033409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:49,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:49,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:49:49,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463022755] [2024-06-04 14:49:49,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:49,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:49:49,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:49,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:49:49,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:49:49,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:49:49,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 177 transitions, 1678 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:49,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:49,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:49:49,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:50,606 INFO L124 PetriNetUnfolderBase]: 2704/4090 cut-off events. [2024-06-04 14:49:50,607 INFO L125 PetriNetUnfolderBase]: For 206872/206872 co-relation queries the response was YES. [2024-06-04 14:49:50,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28828 conditions, 4090 events. 2704/4090 cut-off events. For 206872/206872 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20377 event pairs, 771 based on Foata normal form. 2/4090 useless extension candidates. Maximal degree in co-relation 28752. Up to 4042 conditions per place. [2024-06-04 14:49:50,644 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 176 selfloop transitions, 17 changer transitions 0/196 dead transitions. [2024-06-04 14:49:50,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 196 transitions, 2150 flow [2024-06-04 14:49:50,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:49:50,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:49:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 14:49:50,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-04 14:49:50,645 INFO L175 Difference]: Start difference. First operand has 159 places, 177 transitions, 1678 flow. Second operand 7 states and 116 transitions. [2024-06-04 14:49:50,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 196 transitions, 2150 flow [2024-06-04 14:49:50,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 196 transitions, 2079 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:50,846 INFO L231 Difference]: Finished difference. Result has 160 places, 180 transitions, 1698 flow [2024-06-04 14:49:50,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1698, PETRI_PLACES=160, PETRI_TRANSITIONS=180} [2024-06-04 14:49:50,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-04 14:49:50,847 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 180 transitions, 1698 flow [2024-06-04 14:49:50,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:50,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:50,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:50,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:49:50,847 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:50,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:50,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1833505325, now seen corresponding path program 2 times [2024-06-04 14:49:50,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:50,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946785310] [2024-06-04 14:49:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:50,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:51,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:51,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946785310] [2024-06-04 14:49:51,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946785310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:51,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:51,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:49:51,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168279929] [2024-06-04 14:49:51,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:51,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:49:51,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:51,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:49:51,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:49:51,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:49:51,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 180 transitions, 1698 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:51,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:51,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:49:51,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:52,516 INFO L124 PetriNetUnfolderBase]: 2714/4104 cut-off events. [2024-06-04 14:49:52,516 INFO L125 PetriNetUnfolderBase]: For 216088/216088 co-relation queries the response was YES. [2024-06-04 14:49:52,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29400 conditions, 4104 events. 2714/4104 cut-off events. For 216088/216088 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20442 event pairs, 782 based on Foata normal form. 2/4104 useless extension candidates. Maximal degree in co-relation 29323. Up to 4032 conditions per place. [2024-06-04 14:49:52,546 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 170 selfloop transitions, 29 changer transitions 0/202 dead transitions. [2024-06-04 14:49:52,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 202 transitions, 2322 flow [2024-06-04 14:49:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:49:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:49:52,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 14:49:52,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:49:52,547 INFO L175 Difference]: Start difference. First operand has 160 places, 180 transitions, 1698 flow. Second operand 7 states and 119 transitions. [2024-06-04 14:49:52,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 202 transitions, 2322 flow [2024-06-04 14:49:52,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 202 transitions, 2255 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 14:49:52,735 INFO L231 Difference]: Finished difference. Result has 162 places, 186 transitions, 1801 flow [2024-06-04 14:49:52,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1801, PETRI_PLACES=162, PETRI_TRANSITIONS=186} [2024-06-04 14:49:52,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-04 14:49:52,736 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 186 transitions, 1801 flow [2024-06-04 14:49:52,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:52,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:52,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:52,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:49:52,737 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:52,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash 794999101, now seen corresponding path program 1 times [2024-06-04 14:49:52,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:52,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598842924] [2024-06-04 14:49:52,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:52,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:53,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:53,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598842924] [2024-06-04 14:49:53,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598842924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:53,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:53,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:49:53,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82264739] [2024-06-04 14:49:53,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:53,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:49:53,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:53,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:49:53,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:49:53,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:49:53,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 186 transitions, 1801 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:53,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:53,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:49:53,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:54,316 INFO L124 PetriNetUnfolderBase]: 2729/4125 cut-off events. [2024-06-04 14:49:54,316 INFO L125 PetriNetUnfolderBase]: For 228252/228252 co-relation queries the response was YES. [2024-06-04 14:49:54,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30058 conditions, 4125 events. 2729/4125 cut-off events. For 228252/228252 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 20545 event pairs, 778 based on Foata normal form. 3/4126 useless extension candidates. Maximal degree in co-relation 29980. Up to 4056 conditions per place. [2024-06-04 14:49:54,350 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 26 changer transitions 0/210 dead transitions. [2024-06-04 14:49:54,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 210 transitions, 2409 flow [2024-06-04 14:49:54,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:49:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:49:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 14:49:54,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-04 14:49:54,352 INFO L175 Difference]: Start difference. First operand has 162 places, 186 transitions, 1801 flow. Second operand 7 states and 122 transitions. [2024-06-04 14:49:54,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 210 transitions, 2409 flow [2024-06-04 14:49:54,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 210 transitions, 2343 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:54,548 INFO L231 Difference]: Finished difference. Result has 166 places, 192 transitions, 1863 flow [2024-06-04 14:49:54,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1863, PETRI_PLACES=166, PETRI_TRANSITIONS=192} [2024-06-04 14:49:54,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-04 14:49:54,549 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 192 transitions, 1863 flow [2024-06-04 14:49:54,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:54,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:54,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:54,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:49:54,549 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:54,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:54,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2087505475, now seen corresponding path program 3 times [2024-06-04 14:49:54,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:54,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983486371] [2024-06-04 14:49:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:54,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:55,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:55,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983486371] [2024-06-04 14:49:55,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983486371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:55,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:55,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:49:55,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627314334] [2024-06-04 14:49:55,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:55,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:49:55,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:55,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:49:55,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:49:55,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:49:55,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 192 transitions, 1863 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:55,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:55,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:49:55,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:56,139 INFO L124 PetriNetUnfolderBase]: 2723/4118 cut-off events. [2024-06-04 14:49:56,139 INFO L125 PetriNetUnfolderBase]: For 235704/235706 co-relation queries the response was YES. [2024-06-04 14:49:56,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30495 conditions, 4118 events. 2723/4118 cut-off events. For 235704/235706 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20532 event pairs, 782 based on Foata normal form. 2/4118 useless extension candidates. Maximal degree in co-relation 30415. Up to 4048 conditions per place. [2024-06-04 14:49:56,175 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 171 selfloop transitions, 29 changer transitions 0/203 dead transitions. [2024-06-04 14:49:56,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 203 transitions, 2293 flow [2024-06-04 14:49:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:49:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:49:56,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-04 14:49:56,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-04 14:49:56,176 INFO L175 Difference]: Start difference. First operand has 166 places, 192 transitions, 1863 flow. Second operand 7 states and 115 transitions. [2024-06-04 14:49:56,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 203 transitions, 2293 flow [2024-06-04 14:49:56,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 203 transitions, 2216 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:56,391 INFO L231 Difference]: Finished difference. Result has 170 places, 192 transitions, 1850 flow [2024-06-04 14:49:56,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1850, PETRI_PLACES=170, PETRI_TRANSITIONS=192} [2024-06-04 14:49:56,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-04 14:49:56,392 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 192 transitions, 1850 flow [2024-06-04 14:49:56,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:56,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:56,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:56,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:49:56,392 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:56,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:56,393 INFO L85 PathProgramCache]: Analyzing trace with hash 759652181, now seen corresponding path program 2 times [2024-06-04 14:49:56,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:56,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969620002] [2024-06-04 14:49:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:56,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:57,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:57,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969620002] [2024-06-04 14:49:57,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969620002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:57,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:57,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:49:57,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599407366] [2024-06-04 14:49:57,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:57,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:49:57,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:57,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:49:57,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:49:57,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:49:57,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 192 transitions, 1850 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:57,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:57,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:49:57,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:57,918 INFO L124 PetriNetUnfolderBase]: 2738/4139 cut-off events. [2024-06-04 14:49:57,918 INFO L125 PetriNetUnfolderBase]: For 245297/245299 co-relation queries the response was YES. [2024-06-04 14:49:57,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30781 conditions, 4139 events. 2738/4139 cut-off events. For 245297/245299 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20706 event pairs, 767 based on Foata normal form. 5/4142 useless extension candidates. Maximal degree in co-relation 30699. Up to 4062 conditions per place. [2024-06-04 14:49:57,955 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 176 selfloop transitions, 30 changer transitions 0/209 dead transitions. [2024-06-04 14:49:57,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 209 transitions, 2418 flow [2024-06-04 14:49:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:49:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:49:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 14:49:57,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-04 14:49:57,958 INFO L175 Difference]: Start difference. First operand has 170 places, 192 transitions, 1850 flow. Second operand 7 states and 116 transitions. [2024-06-04 14:49:57,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 209 transitions, 2418 flow [2024-06-04 14:49:58,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 209 transitions, 2338 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:58,148 INFO L231 Difference]: Finished difference. Result has 171 places, 195 transitions, 1869 flow [2024-06-04 14:49:58,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1869, PETRI_PLACES=171, PETRI_TRANSITIONS=195} [2024-06-04 14:49:58,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-04 14:49:58,149 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 195 transitions, 1869 flow [2024-06-04 14:49:58,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:58,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:58,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:58,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:49:58,149 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:58,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:58,150 INFO L85 PathProgramCache]: Analyzing trace with hash 759415031, now seen corresponding path program 3 times [2024-06-04 14:49:58,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:58,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671799011] [2024-06-04 14:49:58,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:58,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:58,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:58,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671799011] [2024-06-04 14:49:58,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671799011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:58,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:58,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:49:58,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133370404] [2024-06-04 14:49:58,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:58,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:49:58,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:58,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:49:58,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:49:58,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:49:58,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 195 transitions, 1869 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:58,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:58,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:49:58,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:59,701 INFO L124 PetriNetUnfolderBase]: 2729/4127 cut-off events. [2024-06-04 14:49:59,701 INFO L125 PetriNetUnfolderBase]: For 251658/251660 co-relation queries the response was YES. [2024-06-04 14:49:59,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30803 conditions, 4127 events. 2729/4127 cut-off events. For 251658/251660 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20649 event pairs, 775 based on Foata normal form. 5/4130 useless extension candidates. Maximal degree in co-relation 30720. Up to 4055 conditions per place. [2024-06-04 14:49:59,744 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 178 selfloop transitions, 29 changer transitions 0/210 dead transitions. [2024-06-04 14:49:59,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 210 transitions, 2323 flow [2024-06-04 14:49:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:49:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:49:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-04 14:49:59,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-04 14:49:59,745 INFO L175 Difference]: Start difference. First operand has 171 places, 195 transitions, 1869 flow. Second operand 7 states and 118 transitions. [2024-06-04 14:49:59,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 210 transitions, 2323 flow [2024-06-04 14:49:59,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 210 transitions, 2242 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-04 14:49:59,925 INFO L231 Difference]: Finished difference. Result has 174 places, 195 transitions, 1852 flow [2024-06-04 14:49:59,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1852, PETRI_PLACES=174, PETRI_TRANSITIONS=195} [2024-06-04 14:49:59,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-04 14:49:59,926 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 195 transitions, 1852 flow [2024-06-04 14:49:59,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:59,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:59,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:59,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:49:59,926 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:59,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:59,926 INFO L85 PathProgramCache]: Analyzing trace with hash -165340796, now seen corresponding path program 1 times [2024-06-04 14:49:59,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:59,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052010785] [2024-06-04 14:49:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:59,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:00,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:00,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052010785] [2024-06-04 14:50:00,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052010785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:00,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:00,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:00,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244238327] [2024-06-04 14:50:00,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:00,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:00,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:00,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:00,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:00,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:00,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 195 transitions, 1852 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:00,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:00,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:00,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:01,702 INFO L124 PetriNetUnfolderBase]: 2739/4140 cut-off events. [2024-06-04 14:50:01,702 INFO L125 PetriNetUnfolderBase]: For 258709/258709 co-relation queries the response was YES. [2024-06-04 14:50:01,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31007 conditions, 4140 events. 2739/4140 cut-off events. For 258709/258709 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20690 event pairs, 763 based on Foata normal form. 1/4139 useless extension candidates. Maximal degree in co-relation 30923. Up to 4053 conditions per place. [2024-06-04 14:50:01,739 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 200 selfloop transitions, 36 changer transitions 0/239 dead transitions. [2024-06-04 14:50:01,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 239 transitions, 2641 flow [2024-06-04 14:50:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:50:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:50:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 14:50:01,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-04 14:50:01,740 INFO L175 Difference]: Start difference. First operand has 174 places, 195 transitions, 1852 flow. Second operand 9 states and 155 transitions. [2024-06-04 14:50:01,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 239 transitions, 2641 flow [2024-06-04 14:50:01,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 239 transitions, 2558 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 14:50:01,935 INFO L231 Difference]: Finished difference. Result has 177 places, 209 transitions, 2009 flow [2024-06-04 14:50:01,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2009, PETRI_PLACES=177, PETRI_TRANSITIONS=209} [2024-06-04 14:50:01,936 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-04 14:50:01,936 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 209 transitions, 2009 flow [2024-06-04 14:50:01,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:01,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:01,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:01,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:50:01,936 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:01,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:01,936 INFO L85 PathProgramCache]: Analyzing trace with hash -170724318, now seen corresponding path program 1 times [2024-06-04 14:50:01,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:01,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745991558] [2024-06-04 14:50:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:01,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:02,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:02,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745991558] [2024-06-04 14:50:02,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745991558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:02,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:02,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:50:02,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339040182] [2024-06-04 14:50:02,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:02,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:50:02,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:02,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:50:02,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:50:02,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:02,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 209 transitions, 2009 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:02,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:02,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:02,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:03,333 INFO L124 PetriNetUnfolderBase]: 2752/4159 cut-off events. [2024-06-04 14:50:03,334 INFO L125 PetriNetUnfolderBase]: For 271917/271919 co-relation queries the response was YES. [2024-06-04 14:50:03,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31864 conditions, 4159 events. 2752/4159 cut-off events. For 271917/271919 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20822 event pairs, 768 based on Foata normal form. 3/4160 useless extension candidates. Maximal degree in co-relation 31778. Up to 4071 conditions per place. [2024-06-04 14:50:03,372 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 200 selfloop transitions, 35 changer transitions 0/238 dead transitions. [2024-06-04 14:50:03,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 238 transitions, 2839 flow [2024-06-04 14:50:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:50:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:50:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-04 14:50:03,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-04 14:50:03,373 INFO L175 Difference]: Start difference. First operand has 177 places, 209 transitions, 2009 flow. Second operand 7 states and 124 transitions. [2024-06-04 14:50:03,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 238 transitions, 2839 flow [2024-06-04 14:50:03,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 238 transitions, 2774 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-04 14:50:03,655 INFO L231 Difference]: Finished difference. Result has 182 places, 218 transitions, 2146 flow [2024-06-04 14:50:03,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1944, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2146, PETRI_PLACES=182, PETRI_TRANSITIONS=218} [2024-06-04 14:50:03,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-04 14:50:03,656 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 218 transitions, 2146 flow [2024-06-04 14:50:03,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:03,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:03,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:03,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:50:03,656 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)] === [2024-06-04 14:50:03,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash -165010398, now seen corresponding path program 2 times [2024-06-04 14:50:03,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:03,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628241015] [2024-06-04 14:50:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:03,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:04,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:04,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628241015] [2024-06-04 14:50:04,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628241015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:04,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:04,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:50:04,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753247855] [2024-06-04 14:50:04,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:04,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:50:04,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:04,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:50:04,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:50:04,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:04,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 218 transitions, 2146 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:04,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:04,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:04,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:05,111 INFO L124 PetriNetUnfolderBase]: 2765/4177 cut-off events. [2024-06-04 14:50:05,111 INFO L125 PetriNetUnfolderBase]: For 285025/285027 co-relation queries the response was YES. [2024-06-04 14:50:05,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32655 conditions, 4177 events. 2765/4177 cut-off events. For 285025/285027 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20902 event pairs, 773 based on Foata normal form. 3/4178 useless extension candidates. Maximal degree in co-relation 32567. Up to 4086 conditions per place. [2024-06-04 14:50:05,157 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 197 selfloop transitions, 42 changer transitions 0/242 dead transitions. [2024-06-04 14:50:05,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 242 transitions, 2961 flow [2024-06-04 14:50:05,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:50:05,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:50:05,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-04 14:50:05,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-04 14:50:05,158 INFO L175 Difference]: Start difference. First operand has 182 places, 218 transitions, 2146 flow. Second operand 7 states and 121 transitions. [2024-06-04 14:50:05,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 242 transitions, 2961 flow [2024-06-04 14:50:05,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 242 transitions, 2858 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-04 14:50:05,512 INFO L231 Difference]: Finished difference. Result has 187 places, 225 transitions, 2234 flow [2024-06-04 14:50:05,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2234, PETRI_PLACES=187, PETRI_TRANSITIONS=225} [2024-06-04 14:50:05,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-04 14:50:05,513 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 225 transitions, 2234 flow [2024-06-04 14:50:05,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:05,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:05,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:05,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:50:05,513 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:05,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:05,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1939835188, now seen corresponding path program 1 times [2024-06-04 14:50:05,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:05,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397283208] [2024-06-04 14:50:05,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:05,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:06,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:06,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397283208] [2024-06-04 14:50:06,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397283208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:06,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:06,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:50:06,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835369065] [2024-06-04 14:50:06,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:06,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:50:06,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:06,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:50:06,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:50:07,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:50:07,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 225 transitions, 2234 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:07,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:07,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:50:07,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:07,876 INFO L124 PetriNetUnfolderBase]: 2735/4177 cut-off events. [2024-06-04 14:50:07,876 INFO L125 PetriNetUnfolderBase]: For 311404/311406 co-relation queries the response was YES. [2024-06-04 14:50:07,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33133 conditions, 4177 events. 2735/4177 cut-off events. For 311404/311406 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 21362 event pairs, 678 based on Foata normal form. 12/4177 useless extension candidates. Maximal degree in co-relation 33043. Up to 3624 conditions per place. [2024-06-04 14:50:07,913 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 58 changer transitions 0/266 dead transitions. [2024-06-04 14:50:07,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 266 transitions, 2894 flow [2024-06-04 14:50:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:07,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-04 14:50:07,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-04 14:50:07,914 INFO L175 Difference]: Start difference. First operand has 187 places, 225 transitions, 2234 flow. Second operand 10 states and 187 transitions. [2024-06-04 14:50:07,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 266 transitions, 2894 flow [2024-06-04 14:50:08,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 266 transitions, 2824 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 14:50:08,189 INFO L231 Difference]: Finished difference. Result has 194 places, 226 transitions, 2344 flow [2024-06-04 14:50:08,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2344, PETRI_PLACES=194, PETRI_TRANSITIONS=226} [2024-06-04 14:50:08,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-04 14:50:08,189 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 226 transitions, 2344 flow [2024-06-04 14:50:08,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:08,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:08,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:08,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:50:08,189 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)] === [2024-06-04 14:50:08,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:08,190 INFO L85 PathProgramCache]: Analyzing trace with hash -165014366, now seen corresponding path program 2 times [2024-06-04 14:50:08,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:08,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545489242] [2024-06-04 14:50:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:08,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:09,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:09,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545489242] [2024-06-04 14:50:09,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545489242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:09,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:09,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:09,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743170441] [2024-06-04 14:50:09,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:09,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:09,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:09,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:09,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:09,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:09,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 226 transitions, 2344 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:09,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:09,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:09,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:09,858 INFO L124 PetriNetUnfolderBase]: 2811/4254 cut-off events. [2024-06-04 14:50:09,858 INFO L125 PetriNetUnfolderBase]: For 310181/310181 co-relation queries the response was YES. [2024-06-04 14:50:09,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33783 conditions, 4254 events. 2811/4254 cut-off events. For 310181/310181 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 21473 event pairs, 777 based on Foata normal form. 1/4253 useless extension candidates. Maximal degree in co-relation 33692. Up to 4190 conditions per place. [2024-06-04 14:50:09,897 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 212 selfloop transitions, 30 changer transitions 0/245 dead transitions. [2024-06-04 14:50:09,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 245 transitions, 2908 flow [2024-06-04 14:50:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:09,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:09,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-04 14:50:09,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-04 14:50:09,898 INFO L175 Difference]: Start difference. First operand has 194 places, 226 transitions, 2344 flow. Second operand 8 states and 130 transitions. [2024-06-04 14:50:09,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 245 transitions, 2908 flow [2024-06-04 14:50:10,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 245 transitions, 2750 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-04 14:50:10,225 INFO L231 Difference]: Finished difference. Result has 194 places, 229 transitions, 2296 flow [2024-06-04 14:50:10,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2296, PETRI_PLACES=194, PETRI_TRANSITIONS=229} [2024-06-04 14:50:10,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-04 14:50:10,226 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 229 transitions, 2296 flow [2024-06-04 14:50:10,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:10,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:10,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:10,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:50:10,226 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)] === [2024-06-04 14:50:10,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:10,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1025385506, now seen corresponding path program 3 times [2024-06-04 14:50:10,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:10,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417468480] [2024-06-04 14:50:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:10,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:10,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:10,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417468480] [2024-06-04 14:50:10,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417468480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:10,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:10,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:50:10,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362118537] [2024-06-04 14:50:10,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:10,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:50:10,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:10,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:50:10,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:50:10,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:10,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 229 transitions, 2296 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:10,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:10,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:10,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:11,663 INFO L124 PetriNetUnfolderBase]: 2808/4250 cut-off events. [2024-06-04 14:50:11,663 INFO L125 PetriNetUnfolderBase]: For 314200/314200 co-relation queries the response was YES. [2024-06-04 14:50:11,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33472 conditions, 4250 events. 2808/4250 cut-off events. For 314200/314200 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21476 event pairs, 776 based on Foata normal form. 1/4249 useless extension candidates. Maximal degree in co-relation 33380. Up to 4201 conditions per place. [2024-06-04 14:50:11,704 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 217 selfloop transitions, 25 changer transitions 0/245 dead transitions. [2024-06-04 14:50:11,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 245 transitions, 2922 flow [2024-06-04 14:50:11,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:50:11,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:50:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-04 14:50:11,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-04 14:50:11,705 INFO L175 Difference]: Start difference. First operand has 194 places, 229 transitions, 2296 flow. Second operand 7 states and 118 transitions. [2024-06-04 14:50:11,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 245 transitions, 2922 flow [2024-06-04 14:50:12,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 245 transitions, 2828 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:12,031 INFO L231 Difference]: Finished difference. Result has 196 places, 229 transitions, 2258 flow [2024-06-04 14:50:12,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2258, PETRI_PLACES=196, PETRI_TRANSITIONS=229} [2024-06-04 14:50:12,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-04 14:50:12,032 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 229 transitions, 2258 flow [2024-06-04 14:50:12,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:12,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:12,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:12,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:50:12,033 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:12,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:12,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1036813346, now seen corresponding path program 4 times [2024-06-04 14:50:12,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:12,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463127382] [2024-06-04 14:50:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:12,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:12,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:12,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463127382] [2024-06-04 14:50:12,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463127382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:12,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:12,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:50:12,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841435171] [2024-06-04 14:50:12,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:12,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:50:12,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:12,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:50:12,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:50:12,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:12,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 229 transitions, 2258 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:12,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:12,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:12,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:13,497 INFO L124 PetriNetUnfolderBase]: 2813/4257 cut-off events. [2024-06-04 14:50:13,497 INFO L125 PetriNetUnfolderBase]: For 325832/325832 co-relation queries the response was YES. [2024-06-04 14:50:13,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33697 conditions, 4257 events. 2813/4257 cut-off events. For 325832/325832 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21473 event pairs, 787 based on Foata normal form. 1/4256 useless extension candidates. Maximal degree in co-relation 33604. Up to 4223 conditions per place. [2024-06-04 14:50:13,540 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 221 selfloop transitions, 20 changer transitions 0/244 dead transitions. [2024-06-04 14:50:13,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 244 transitions, 2815 flow [2024-06-04 14:50:13,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:50:13,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:50:13,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-04 14:50:13,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-04 14:50:13,541 INFO L175 Difference]: Start difference. First operand has 196 places, 229 transitions, 2258 flow. Second operand 7 states and 113 transitions. [2024-06-04 14:50:13,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 244 transitions, 2815 flow [2024-06-04 14:50:13,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 244 transitions, 2721 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 14:50:13,916 INFO L231 Difference]: Finished difference. Result has 197 places, 232 transitions, 2261 flow [2024-06-04 14:50:13,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2261, PETRI_PLACES=197, PETRI_TRANSITIONS=232} [2024-06-04 14:50:13,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-04 14:50:13,917 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 232 transitions, 2261 flow [2024-06-04 14:50:13,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:13,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:13,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:13,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:50:13,917 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:13,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:13,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1380141564, now seen corresponding path program 5 times [2024-06-04 14:50:13,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:13,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389614998] [2024-06-04 14:50:13,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:13,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:14,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:14,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389614998] [2024-06-04 14:50:14,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389614998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:14,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:14,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:50:14,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736048361] [2024-06-04 14:50:14,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:14,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:50:14,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:50:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:50:14,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:14,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 232 transitions, 2261 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:14,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:14,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:14,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:15,346 INFO L124 PetriNetUnfolderBase]: 2810/4254 cut-off events. [2024-06-04 14:50:15,347 INFO L125 PetriNetUnfolderBase]: For 335508/335510 co-relation queries the response was YES. [2024-06-04 14:50:15,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33772 conditions, 4254 events. 2810/4254 cut-off events. For 335508/335510 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 21520 event pairs, 790 based on Foata normal form. 3/4255 useless extension candidates. Maximal degree in co-relation 33679. Up to 4209 conditions per place. [2024-06-04 14:50:15,386 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 211 selfloop transitions, 28 changer transitions 0/242 dead transitions. [2024-06-04 14:50:15,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 242 transitions, 2869 flow [2024-06-04 14:50:15,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:50:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:50:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-04 14:50:15,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:50:15,387 INFO L175 Difference]: Start difference. First operand has 197 places, 232 transitions, 2261 flow. Second operand 7 states and 112 transitions. [2024-06-04 14:50:15,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 242 transitions, 2869 flow [2024-06-04 14:50:15,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 242 transitions, 2801 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:15,735 INFO L231 Difference]: Finished difference. Result has 199 places, 232 transitions, 2255 flow [2024-06-04 14:50:15,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2255, PETRI_PLACES=199, PETRI_TRANSITIONS=232} [2024-06-04 14:50:15,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-04 14:50:15,736 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 232 transitions, 2255 flow [2024-06-04 14:50:15,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:15,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:15,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:15,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:50:15,736 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:15,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:15,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2067016936, now seen corresponding path program 6 times [2024-06-04 14:50:15,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:15,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171638867] [2024-06-04 14:50:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:15,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:16,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:16,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171638867] [2024-06-04 14:50:16,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171638867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:16,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:16,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:50:16,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005221192] [2024-06-04 14:50:16,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:16,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:50:16,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:16,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:50:16,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:50:16,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:16,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 232 transitions, 2255 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:16,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:16,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:16,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:17,201 INFO L124 PetriNetUnfolderBase]: 2807/4250 cut-off events. [2024-06-04 14:50:17,201 INFO L125 PetriNetUnfolderBase]: For 344184/344186 co-relation queries the response was YES. [2024-06-04 14:50:17,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33895 conditions, 4250 events. 2807/4250 cut-off events. For 344184/344186 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 21505 event pairs, 779 based on Foata normal form. 3/4251 useless extension candidates. Maximal degree in co-relation 33801. Up to 4215 conditions per place. [2024-06-04 14:50:17,241 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 218 selfloop transitions, 20 changer transitions 0/241 dead transitions. [2024-06-04 14:50:17,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 241 transitions, 2753 flow [2024-06-04 14:50:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:50:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:50:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-04 14:50:17,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-04 14:50:17,253 INFO L175 Difference]: Start difference. First operand has 199 places, 232 transitions, 2255 flow. Second operand 7 states and 110 transitions. [2024-06-04 14:50:17,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 241 transitions, 2753 flow [2024-06-04 14:50:17,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 241 transitions, 2648 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 14:50:17,612 INFO L231 Difference]: Finished difference. Result has 200 places, 232 transitions, 2196 flow [2024-06-04 14:50:17,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2196, PETRI_PLACES=200, PETRI_TRANSITIONS=232} [2024-06-04 14:50:17,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-04 14:50:17,612 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 232 transitions, 2196 flow [2024-06-04 14:50:17,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:17,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:17,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:17,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:50:17,613 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)] === [2024-06-04 14:50:17,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:17,613 INFO L85 PathProgramCache]: Analyzing trace with hash -704976808, now seen corresponding path program 1 times [2024-06-04 14:50:17,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:17,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338297737] [2024-06-04 14:50:17,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:17,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:18,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:18,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338297737] [2024-06-04 14:50:18,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338297737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:18,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:18,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:18,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488238704] [2024-06-04 14:50:18,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:18,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:18,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:18,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:18,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:18,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:50:18,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 232 transitions, 2196 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:18,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:18,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:50:18,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:19,970 INFO L124 PetriNetUnfolderBase]: 2837/4355 cut-off events. [2024-06-04 14:50:19,971 INFO L125 PetriNetUnfolderBase]: For 374080/374080 co-relation queries the response was YES. [2024-06-04 14:50:19,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34688 conditions, 4355 events. 2837/4355 cut-off events. For 374080/374080 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22746 event pairs, 769 based on Foata normal form. 16/4369 useless extension candidates. Maximal degree in co-relation 34593. Up to 3885 conditions per place. [2024-06-04 14:50:20,010 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 34 changer transitions 0/272 dead transitions. [2024-06-04 14:50:20,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 272 transitions, 2912 flow [2024-06-04 14:50:20,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-04 14:50:20,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-04 14:50:20,011 INFO L175 Difference]: Start difference. First operand has 200 places, 232 transitions, 2196 flow. Second operand 10 states and 179 transitions. [2024-06-04 14:50:20,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 272 transitions, 2912 flow [2024-06-04 14:50:20,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 272 transitions, 2870 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:20,446 INFO L231 Difference]: Finished difference. Result has 205 places, 234 transitions, 2320 flow [2024-06-04 14:50:20,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2320, PETRI_PLACES=205, PETRI_TRANSITIONS=234} [2024-06-04 14:50:20,446 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-04 14:50:20,447 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 234 transitions, 2320 flow [2024-06-04 14:50:20,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:20,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:20,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:20,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:50:20,447 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)] === [2024-06-04 14:50:20,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:20,448 INFO L85 PathProgramCache]: Analyzing trace with hash -95884930, now seen corresponding path program 2 times [2024-06-04 14:50:20,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:20,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454368458] [2024-06-04 14:50:20,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:20,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:21,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:21,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454368458] [2024-06-04 14:50:21,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454368458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:21,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:21,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:50:21,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728206818] [2024-06-04 14:50:21,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:21,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:50:21,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:21,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:50:21,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:50:22,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:50:22,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 234 transitions, 2320 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:22,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:22,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:50:22,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:23,143 INFO L124 PetriNetUnfolderBase]: 2919/4497 cut-off events. [2024-06-04 14:50:23,143 INFO L125 PetriNetUnfolderBase]: For 389687/389687 co-relation queries the response was YES. [2024-06-04 14:50:23,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36037 conditions, 4497 events. 2919/4497 cut-off events. For 389687/389687 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 23849 event pairs, 774 based on Foata normal form. 12/4507 useless extension candidates. Maximal degree in co-relation 35941. Up to 4097 conditions per place. [2024-06-04 14:50:23,189 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 31 changer transitions 0/272 dead transitions. [2024-06-04 14:50:23,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 272 transitions, 3008 flow [2024-06-04 14:50:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-04 14:50:23,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-04 14:50:23,190 INFO L175 Difference]: Start difference. First operand has 205 places, 234 transitions, 2320 flow. Second operand 10 states and 176 transitions. [2024-06-04 14:50:23,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 272 transitions, 3008 flow [2024-06-04 14:50:23,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 272 transitions, 2910 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-04 14:50:23,724 INFO L231 Difference]: Finished difference. Result has 207 places, 236 transitions, 2383 flow [2024-06-04 14:50:23,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2383, PETRI_PLACES=207, PETRI_TRANSITIONS=236} [2024-06-04 14:50:23,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-04 14:50:23,725 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 236 transitions, 2383 flow [2024-06-04 14:50:23,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:23,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:23,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:23,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:50:23,726 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)] === [2024-06-04 14:50:23,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:23,726 INFO L85 PathProgramCache]: Analyzing trace with hash 573091438, now seen corresponding path program 3 times [2024-06-04 14:50:23,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:23,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206213548] [2024-06-04 14:50:23,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:23,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:25,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:25,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206213548] [2024-06-04 14:50:25,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206213548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:25,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:25,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:50:25,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444676762] [2024-06-04 14:50:25,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:25,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:50:25,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:25,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:50:25,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:50:25,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:50:25,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 236 transitions, 2383 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:25,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:25,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:50:25,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:26,248 INFO L124 PetriNetUnfolderBase]: 2960/4568 cut-off events. [2024-06-04 14:50:26,248 INFO L125 PetriNetUnfolderBase]: For 403190/403190 co-relation queries the response was YES. [2024-06-04 14:50:26,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36605 conditions, 4568 events. 2960/4568 cut-off events. For 403190/403190 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24367 event pairs, 799 based on Foata normal form. 12/4578 useless extension candidates. Maximal degree in co-relation 36508. Up to 4150 conditions per place. [2024-06-04 14:50:26,294 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 210 selfloop transitions, 40 changer transitions 0/274 dead transitions. [2024-06-04 14:50:26,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 274 transitions, 3051 flow [2024-06-04 14:50:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:26,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:26,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-04 14:50:26,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-04 14:50:26,295 INFO L175 Difference]: Start difference. First operand has 207 places, 236 transitions, 2383 flow. Second operand 10 states and 181 transitions. [2024-06-04 14:50:26,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 274 transitions, 3051 flow [2024-06-04 14:50:26,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 274 transitions, 2930 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-04 14:50:26,810 INFO L231 Difference]: Finished difference. Result has 209 places, 237 transitions, 2412 flow [2024-06-04 14:50:26,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2412, PETRI_PLACES=209, PETRI_TRANSITIONS=237} [2024-06-04 14:50:26,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-04 14:50:26,811 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 237 transitions, 2412 flow [2024-06-04 14:50:26,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:26,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:26,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:26,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:50:26,811 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)] === [2024-06-04 14:50:26,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:26,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1887093894, now seen corresponding path program 4 times [2024-06-04 14:50:26,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:26,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400046347] [2024-06-04 14:50:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:26,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:28,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:28,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400046347] [2024-06-04 14:50:28,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400046347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:28,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:28,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:50:28,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080342198] [2024-06-04 14:50:28,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:28,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:50:28,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:28,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:50:28,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:50:28,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:50:28,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 237 transitions, 2412 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:28,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:28,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:50:28,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:29,283 INFO L124 PetriNetUnfolderBase]: 3035/4693 cut-off events. [2024-06-04 14:50:29,283 INFO L125 PetriNetUnfolderBase]: For 416535/416535 co-relation queries the response was YES. [2024-06-04 14:50:29,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37298 conditions, 4693 events. 3035/4693 cut-off events. For 416535/416535 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25316 event pairs, 819 based on Foata normal form. 12/4703 useless extension candidates. Maximal degree in co-relation 37200. Up to 4366 conditions per place. [2024-06-04 14:50:29,325 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 231 selfloop transitions, 24 changer transitions 0/279 dead transitions. [2024-06-04 14:50:29,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 279 transitions, 3119 flow [2024-06-04 14:50:29,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:29,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-04 14:50:29,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-04 14:50:29,327 INFO L175 Difference]: Start difference. First operand has 209 places, 237 transitions, 2412 flow. Second operand 10 states and 176 transitions. [2024-06-04 14:50:29,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 279 transitions, 3119 flow [2024-06-04 14:50:29,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 279 transitions, 2991 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-04 14:50:29,717 INFO L231 Difference]: Finished difference. Result has 213 places, 243 transitions, 2454 flow [2024-06-04 14:50:29,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2454, PETRI_PLACES=213, PETRI_TRANSITIONS=243} [2024-06-04 14:50:29,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-04 14:50:29,718 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 243 transitions, 2454 flow [2024-06-04 14:50:29,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:29,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:29,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:29,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:50:29,718 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)] === [2024-06-04 14:50:29,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:29,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1645580766, now seen corresponding path program 5 times [2024-06-04 14:50:29,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:29,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830731461] [2024-06-04 14:50:29,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:29,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:31,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:31,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830731461] [2024-06-04 14:50:31,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830731461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:31,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:31,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:50:31,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066819378] [2024-06-04 14:50:31,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:31,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:50:31,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:31,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:50:31,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:50:31,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:50:31,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 243 transitions, 2454 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:31,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:31,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:50:31,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:32,500 INFO L124 PetriNetUnfolderBase]: 3076/4764 cut-off events. [2024-06-04 14:50:32,500 INFO L125 PetriNetUnfolderBase]: For 430434/430434 co-relation queries the response was YES. [2024-06-04 14:50:32,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37864 conditions, 4764 events. 3076/4764 cut-off events. For 430434/430434 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 25792 event pairs, 823 based on Foata normal form. 12/4774 useless extension candidates. Maximal degree in co-relation 37763. Up to 4464 conditions per place. [2024-06-04 14:50:32,541 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 235 selfloop transitions, 21 changer transitions 0/280 dead transitions. [2024-06-04 14:50:32,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 280 transitions, 3132 flow [2024-06-04 14:50:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-04 14:50:32,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-04 14:50:32,543 INFO L175 Difference]: Start difference. First operand has 213 places, 243 transitions, 2454 flow. Second operand 10 states and 174 transitions. [2024-06-04 14:50:32,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 280 transitions, 3132 flow [2024-06-04 14:50:32,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 280 transitions, 3047 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:32,872 INFO L231 Difference]: Finished difference. Result has 218 places, 244 transitions, 2485 flow [2024-06-04 14:50:32,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2369, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2485, PETRI_PLACES=218, PETRI_TRANSITIONS=244} [2024-06-04 14:50:32,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-04 14:50:32,872 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 244 transitions, 2485 flow [2024-06-04 14:50:32,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:32,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:32,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:32,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:50:32,873 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)] === [2024-06-04 14:50:32,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:32,873 INFO L85 PathProgramCache]: Analyzing trace with hash -764798668, now seen corresponding path program 6 times [2024-06-04 14:50:32,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:32,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759797187] [2024-06-04 14:50:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:32,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:34,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:34,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759797187] [2024-06-04 14:50:34,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759797187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:34,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:34,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:50:34,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395578416] [2024-06-04 14:50:34,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:34,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:50:34,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:34,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:50:34,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:50:34,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:50:34,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 244 transitions, 2485 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:34,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:34,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:50:34,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:35,499 INFO L124 PetriNetUnfolderBase]: 3056/4732 cut-off events. [2024-06-04 14:50:35,499 INFO L125 PetriNetUnfolderBase]: For 424658/424658 co-relation queries the response was YES. [2024-06-04 14:50:35,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36942 conditions, 4732 events. 3056/4732 cut-off events. For 424658/424658 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25629 event pairs, 795 based on Foata normal form. 12/4742 useless extension candidates. Maximal degree in co-relation 36840. Up to 4250 conditions per place. [2024-06-04 14:50:35,549 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 38 changer transitions 0/279 dead transitions. [2024-06-04 14:50:35,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 279 transitions, 3021 flow [2024-06-04 14:50:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-04 14:50:35,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-04 14:50:35,550 INFO L175 Difference]: Start difference. First operand has 218 places, 244 transitions, 2485 flow. Second operand 10 states and 176 transitions. [2024-06-04 14:50:35,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 279 transitions, 3021 flow [2024-06-04 14:50:35,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 279 transitions, 2927 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-04 14:50:35,959 INFO L231 Difference]: Finished difference. Result has 219 places, 243 transitions, 2397 flow [2024-06-04 14:50:35,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2397, PETRI_PLACES=219, PETRI_TRANSITIONS=243} [2024-06-04 14:50:35,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-04 14:50:35,960 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 243 transitions, 2397 flow [2024-06-04 14:50:35,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:35,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:35,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:35,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:50:35,960 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:35,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:35,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2061299048, now seen corresponding path program 3 times [2024-06-04 14:50:35,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:35,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554153055] [2024-06-04 14:50:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:35,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:36,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:36,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554153055] [2024-06-04 14:50:36,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554153055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:36,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:36,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:36,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649652316] [2024-06-04 14:50:36,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:36,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:36,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:36,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:36,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:36,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 243 transitions, 2397 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:36,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:36,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:36,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:37,809 INFO L124 PetriNetUnfolderBase]: 3131/4806 cut-off events. [2024-06-04 14:50:37,810 INFO L125 PetriNetUnfolderBase]: For 414530/414530 co-relation queries the response was YES. [2024-06-04 14:50:37,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37170 conditions, 4806 events. 3131/4806 cut-off events. For 414530/414530 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25692 event pairs, 884 based on Foata normal form. 1/4805 useless extension candidates. Maximal degree in co-relation 37067. Up to 4781 conditions per place. [2024-06-04 14:50:37,852 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 18 changer transitions 0/253 dead transitions. [2024-06-04 14:50:37,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 253 transitions, 2921 flow [2024-06-04 14:50:37,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:37,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-04 14:50:37,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-04 14:50:37,853 INFO L175 Difference]: Start difference. First operand has 219 places, 243 transitions, 2397 flow. Second operand 8 states and 119 transitions. [2024-06-04 14:50:37,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 253 transitions, 2921 flow [2024-06-04 14:50:38,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 253 transitions, 2773 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-04 14:50:38,333 INFO L231 Difference]: Finished difference. Result has 219 places, 243 transitions, 2291 flow [2024-06-04 14:50:38,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2291, PETRI_PLACES=219, PETRI_TRANSITIONS=243} [2024-06-04 14:50:38,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-04 14:50:38,334 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 243 transitions, 2291 flow [2024-06-04 14:50:38,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:38,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:38,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:38,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:50:38,334 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:38,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:38,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2074643432, now seen corresponding path program 1 times [2024-06-04 14:50:38,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:38,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63629417] [2024-06-04 14:50:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:38,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:39,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:39,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63629417] [2024-06-04 14:50:39,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63629417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:39,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:39,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:39,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261362417] [2024-06-04 14:50:39,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:39,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:39,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:39,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:39,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:39,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:50:39,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 243 transitions, 2291 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:39,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:39,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:50:39,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:40,155 INFO L124 PetriNetUnfolderBase]: 2896/4524 cut-off events. [2024-06-04 14:50:40,155 INFO L125 PetriNetUnfolderBase]: For 406439/406450 co-relation queries the response was YES. [2024-06-04 14:50:40,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34941 conditions, 4524 events. 2896/4524 cut-off events. For 406439/406450 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 24841 event pairs, 826 based on Foata normal form. 5/4485 useless extension candidates. Maximal degree in co-relation 34837. Up to 4358 conditions per place. [2024-06-04 14:50:40,207 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 18 changer transitions 0/258 dead transitions. [2024-06-04 14:50:40,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 258 transitions, 2837 flow [2024-06-04 14:50:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 14:50:40,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:50:40,208 INFO L175 Difference]: Start difference. First operand has 219 places, 243 transitions, 2291 flow. Second operand 8 states and 128 transitions. [2024-06-04 14:50:40,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 258 transitions, 2837 flow [2024-06-04 14:50:40,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 258 transitions, 2759 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 14:50:40,585 INFO L231 Difference]: Finished difference. Result has 219 places, 246 transitions, 2311 flow [2024-06-04 14:50:40,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2311, PETRI_PLACES=219, PETRI_TRANSITIONS=246} [2024-06-04 14:50:40,585 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-04 14:50:40,585 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 246 transitions, 2311 flow [2024-06-04 14:50:40,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:40,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:40,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:40,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:50:40,586 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:40,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:40,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2033485321, now seen corresponding path program 1 times [2024-06-04 14:50:40,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:40,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994335739] [2024-06-04 14:50:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:40,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:41,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:41,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994335739] [2024-06-04 14:50:41,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994335739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:41,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:41,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:41,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401016252] [2024-06-04 14:50:41,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:41,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:41,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:41,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:41,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:41,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:41,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 246 transitions, 2311 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:41,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:41,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:41,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:42,381 INFO L124 PetriNetUnfolderBase]: 3149/4832 cut-off events. [2024-06-04 14:50:42,381 INFO L125 PetriNetUnfolderBase]: For 422830/422830 co-relation queries the response was YES. [2024-06-04 14:50:42,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37079 conditions, 4832 events. 3149/4832 cut-off events. For 422830/422830 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 25842 event pairs, 885 based on Foata normal form. 6/4836 useless extension candidates. Maximal degree in co-relation 36974. Up to 4760 conditions per place. [2024-06-04 14:50:42,433 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 246 selfloop transitions, 20 changer transitions 0/269 dead transitions. [2024-06-04 14:50:42,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 269 transitions, 2953 flow [2024-06-04 14:50:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-04 14:50:42,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-04 14:50:42,434 INFO L175 Difference]: Start difference. First operand has 219 places, 246 transitions, 2311 flow. Second operand 8 states and 130 transitions. [2024-06-04 14:50:42,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 269 transitions, 2953 flow [2024-06-04 14:50:42,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 269 transitions, 2871 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 14:50:42,845 INFO L231 Difference]: Finished difference. Result has 221 places, 249 transitions, 2337 flow [2024-06-04 14:50:42,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2337, PETRI_PLACES=221, PETRI_TRANSITIONS=249} [2024-06-04 14:50:42,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-04 14:50:42,846 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 249 transitions, 2337 flow [2024-06-04 14:50:42,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:42,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:42,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:42,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:50:42,847 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:42,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:42,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1124830519, now seen corresponding path program 2 times [2024-06-04 14:50:42,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:42,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763384713] [2024-06-04 14:50:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:42,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:43,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:43,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763384713] [2024-06-04 14:50:43,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763384713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:43,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:43,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:43,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433365471] [2024-06-04 14:50:43,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:43,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:43,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:43,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:43,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:43,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:43,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 249 transitions, 2337 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:43,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:43,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:43,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:44,838 INFO L124 PetriNetUnfolderBase]: 3227/4940 cut-off events. [2024-06-04 14:50:44,838 INFO L125 PetriNetUnfolderBase]: For 449326/449326 co-relation queries the response was YES. [2024-06-04 14:50:44,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38698 conditions, 4940 events. 3227/4940 cut-off events. For 449326/449326 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 26403 event pairs, 875 based on Foata normal form. 6/4944 useless extension candidates. Maximal degree in co-relation 38592. Up to 4695 conditions per place. [2024-06-04 14:50:44,882 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 49 changer transitions 0/284 dead transitions. [2024-06-04 14:50:44,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 284 transitions, 3409 flow [2024-06-04 14:50:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 14:50:44,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-04 14:50:44,883 INFO L175 Difference]: Start difference. First operand has 221 places, 249 transitions, 2337 flow. Second operand 8 states and 143 transitions. [2024-06-04 14:50:44,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 284 transitions, 3409 flow [2024-06-04 14:50:45,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 284 transitions, 3323 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 14:50:45,429 INFO L231 Difference]: Finished difference. Result has 223 places, 258 transitions, 2547 flow [2024-06-04 14:50:45,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2251, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2547, PETRI_PLACES=223, PETRI_TRANSITIONS=258} [2024-06-04 14:50:45,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-04 14:50:45,429 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 258 transitions, 2547 flow [2024-06-04 14:50:45,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:45,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:45,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:45,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:50:45,430 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:45,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:45,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1036821437, now seen corresponding path program 3 times [2024-06-04 14:50:45,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:45,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785841550] [2024-06-04 14:50:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:45,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:46,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:46,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785841550] [2024-06-04 14:50:46,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785841550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:46,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:46,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:46,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55123637] [2024-06-04 14:50:46,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:46,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:46,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:46,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:46,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:46,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:46,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 258 transitions, 2547 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:46,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:46,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:46,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:47,404 INFO L124 PetriNetUnfolderBase]: 3209/4916 cut-off events. [2024-06-04 14:50:47,405 INFO L125 PetriNetUnfolderBase]: For 452427/452427 co-relation queries the response was YES. [2024-06-04 14:50:47,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38631 conditions, 4916 events. 3209/4916 cut-off events. For 452427/452427 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 26257 event pairs, 871 based on Foata normal form. 6/4920 useless extension candidates. Maximal degree in co-relation 38524. Up to 4684 conditions per place. [2024-06-04 14:50:47,459 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 48 changer transitions 0/285 dead transitions. [2024-06-04 14:50:47,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 285 transitions, 3315 flow [2024-06-04 14:50:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 14:50:47,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-04 14:50:47,460 INFO L175 Difference]: Start difference. First operand has 223 places, 258 transitions, 2547 flow. Second operand 8 states and 145 transitions. [2024-06-04 14:50:47,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 285 transitions, 3315 flow [2024-06-04 14:50:48,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 285 transitions, 3185 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-04 14:50:48,061 INFO L231 Difference]: Finished difference. Result has 228 places, 258 transitions, 2519 flow [2024-06-04 14:50:48,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2519, PETRI_PLACES=228, PETRI_TRANSITIONS=258} [2024-06-04 14:50:48,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-04 14:50:48,062 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 258 transitions, 2519 flow [2024-06-04 14:50:48,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:48,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:48,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:48,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:50:48,062 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:48,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:48,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1367062323, now seen corresponding path program 4 times [2024-06-04 14:50:48,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:48,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429558580] [2024-06-04 14:50:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:48,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:48,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:48,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429558580] [2024-06-04 14:50:48,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429558580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:48,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:48,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:48,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017541662] [2024-06-04 14:50:48,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:48,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:48,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:48,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:48,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:48,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:48,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 258 transitions, 2519 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:48,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:48,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:48,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:50,128 INFO L124 PetriNetUnfolderBase]: 3239/4959 cut-off events. [2024-06-04 14:50:50,128 INFO L125 PetriNetUnfolderBase]: For 464916/464918 co-relation queries the response was YES. [2024-06-04 14:50:50,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38993 conditions, 4959 events. 3239/4959 cut-off events. For 464916/464918 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26489 event pairs, 888 based on Foata normal form. 6/4963 useless extension candidates. Maximal degree in co-relation 38884. Up to 4706 conditions per place. [2024-06-04 14:50:50,178 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 54 changer transitions 0/281 dead transitions. [2024-06-04 14:50:50,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 281 transitions, 3331 flow [2024-06-04 14:50:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:50,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:50:50,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:50:50,180 INFO L175 Difference]: Start difference. First operand has 228 places, 258 transitions, 2519 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:50:50,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 281 transitions, 3331 flow [2024-06-04 14:50:50,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 281 transitions, 3211 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 14:50:50,694 INFO L231 Difference]: Finished difference. Result has 229 places, 261 transitions, 2583 flow [2024-06-04 14:50:50,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2405, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2583, PETRI_PLACES=229, PETRI_TRANSITIONS=261} [2024-06-04 14:50:50,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-04 14:50:50,694 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 261 transitions, 2583 flow [2024-06-04 14:50:50,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:50,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:50,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:50,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 14:50:50,695 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:50,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:50,695 INFO L85 PathProgramCache]: Analyzing trace with hash -986297383, now seen corresponding path program 5 times [2024-06-04 14:50:50,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:50,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730605007] [2024-06-04 14:50:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:50,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:51,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:51,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730605007] [2024-06-04 14:50:51,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730605007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:51,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:51,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:51,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986794256] [2024-06-04 14:50:51,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:51,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:51,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:51,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:51,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:51,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:51,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 261 transitions, 2583 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:51,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:51,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:51,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:52,758 INFO L124 PetriNetUnfolderBase]: 3269/5001 cut-off events. [2024-06-04 14:50:52,758 INFO L125 PetriNetUnfolderBase]: For 479138/479140 co-relation queries the response was YES. [2024-06-04 14:50:52,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39521 conditions, 5001 events. 3269/5001 cut-off events. For 479138/479140 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26756 event pairs, 893 based on Foata normal form. 6/5005 useless extension candidates. Maximal degree in co-relation 39411. Up to 4728 conditions per place. [2024-06-04 14:50:52,809 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 228 selfloop transitions, 55 changer transitions 0/286 dead transitions. [2024-06-04 14:50:52,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 286 transitions, 3413 flow [2024-06-04 14:50:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:52,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 14:50:52,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-04 14:50:52,810 INFO L175 Difference]: Start difference. First operand has 229 places, 261 transitions, 2583 flow. Second operand 8 states and 139 transitions. [2024-06-04 14:50:52,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 286 transitions, 3413 flow [2024-06-04 14:50:53,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 286 transitions, 3261 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:53,350 INFO L231 Difference]: Finished difference. Result has 232 places, 264 transitions, 2617 flow [2024-06-04 14:50:53,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2617, PETRI_PLACES=232, PETRI_TRANSITIONS=264} [2024-06-04 14:50:53,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-04 14:50:53,350 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 264 transitions, 2617 flow [2024-06-04 14:50:53,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:53,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:53,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:53,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 14:50:53,350 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:53,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:53,351 INFO L85 PathProgramCache]: Analyzing trace with hash -986291803, now seen corresponding path program 6 times [2024-06-04 14:50:53,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:53,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387147202] [2024-06-04 14:50:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:53,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:54,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:54,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387147202] [2024-06-04 14:50:54,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387147202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:54,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:54,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:54,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912861309] [2024-06-04 14:50:54,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:54,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:54,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:54,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:54,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:54,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:54,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 264 transitions, 2617 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:54,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:54,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:54,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:55,342 INFO L124 PetriNetUnfolderBase]: 3251/4977 cut-off events. [2024-06-04 14:50:55,342 INFO L125 PetriNetUnfolderBase]: For 477123/477125 co-relation queries the response was YES. [2024-06-04 14:50:55,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38887 conditions, 4977 events. 3251/4977 cut-off events. For 477123/477125 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26627 event pairs, 898 based on Foata normal form. 6/4981 useless extension candidates. Maximal degree in co-relation 38776. Up to 4717 conditions per place. [2024-06-04 14:50:55,395 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 229 selfloop transitions, 54 changer transitions 0/286 dead transitions. [2024-06-04 14:50:55,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 286 transitions, 3247 flow [2024-06-04 14:50:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:55,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 14:50:55,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 14:50:55,396 INFO L175 Difference]: Start difference. First operand has 232 places, 264 transitions, 2617 flow. Second operand 8 states and 140 transitions. [2024-06-04 14:50:55,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 286 transitions, 3247 flow [2024-06-04 14:50:56,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 286 transitions, 3042 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-04 14:50:56,090 INFO L231 Difference]: Finished difference. Result has 234 places, 264 transitions, 2526 flow [2024-06-04 14:50:56,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2526, PETRI_PLACES=234, PETRI_TRANSITIONS=264} [2024-06-04 14:50:56,091 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-04 14:50:56,091 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 264 transitions, 2526 flow [2024-06-04 14:50:56,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:56,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:56,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:56,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 14:50:56,091 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:56,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:56,092 INFO L85 PathProgramCache]: Analyzing trace with hash 2074659304, now seen corresponding path program 1 times [2024-06-04 14:50:56,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:56,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459007768] [2024-06-04 14:50:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:56,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:57,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:57,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459007768] [2024-06-04 14:50:57,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459007768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:57,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:57,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:57,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886457356] [2024-06-04 14:50:57,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:57,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:57,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:57,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:57,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:57,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:50:57,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 264 transitions, 2526 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:57,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:57,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:50:57,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:58,274 INFO L124 PetriNetUnfolderBase]: 3033/4717 cut-off events. [2024-06-04 14:50:58,274 INFO L125 PetriNetUnfolderBase]: For 475011/475022 co-relation queries the response was YES. [2024-06-04 14:50:58,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37252 conditions, 4717 events. 3033/4717 cut-off events. For 475011/475022 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25819 event pairs, 855 based on Foata normal form. 3/4676 useless extension candidates. Maximal degree in co-relation 37140. Up to 4554 conditions per place. [2024-06-04 14:50:58,327 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 237 selfloop transitions, 17 changer transitions 0/278 dead transitions. [2024-06-04 14:50:58,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 278 transitions, 3108 flow [2024-06-04 14:50:58,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:58,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:50:58,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-04 14:50:58,328 INFO L175 Difference]: Start difference. First operand has 234 places, 264 transitions, 2526 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:50:58,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 278 transitions, 3108 flow [2024-06-04 14:50:58,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 278 transitions, 2962 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:50:58,788 INFO L231 Difference]: Finished difference. Result has 234 places, 266 transitions, 2469 flow [2024-06-04 14:50:58,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2469, PETRI_PLACES=234, PETRI_TRANSITIONS=266} [2024-06-04 14:50:58,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-04 14:50:58,788 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 266 transitions, 2469 flow [2024-06-04 14:50:58,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:58,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:58,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:58,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 14:50:58,789 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:58,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:58,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1861580396, now seen corresponding path program 1 times [2024-06-04 14:50:58,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:58,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529254474] [2024-06-04 14:50:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:58,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:59,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:59,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529254474] [2024-06-04 14:50:59,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529254474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:59,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:59,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:59,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479806656] [2024-06-04 14:50:59,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:59,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:59,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:59,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:59,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:59,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:50:59,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 266 transitions, 2469 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:59,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:59,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:50:59,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:00,628 INFO L124 PetriNetUnfolderBase]: 3259/4987 cut-off events. [2024-06-04 14:51:00,629 INFO L125 PetriNetUnfolderBase]: For 487285/487285 co-relation queries the response was YES. [2024-06-04 14:51:00,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38883 conditions, 4987 events. 3259/4987 cut-off events. For 487285/487285 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26678 event pairs, 903 based on Foata normal form. 1/4986 useless extension candidates. Maximal degree in co-relation 38770. Up to 4906 conditions per place. [2024-06-04 14:51:00,684 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 260 selfloop transitions, 36 changer transitions 0/299 dead transitions. [2024-06-04 14:51:00,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 299 transitions, 3380 flow [2024-06-04 14:51:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 14:51:00,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-04 14:51:00,685 INFO L175 Difference]: Start difference. First operand has 234 places, 266 transitions, 2469 flow. Second operand 8 states and 139 transitions. [2024-06-04 14:51:00,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 299 transitions, 3380 flow [2024-06-04 14:51:01,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 299 transitions, 3307 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 14:51:01,145 INFO L231 Difference]: Finished difference. Result has 237 places, 273 transitions, 2603 flow [2024-06-04 14:51:01,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2603, PETRI_PLACES=237, PETRI_TRANSITIONS=273} [2024-06-04 14:51:01,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-04 14:51:01,145 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 273 transitions, 2603 flow [2024-06-04 14:51:01,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:01,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:01,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:01,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 14:51:01,146 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:01,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:01,146 INFO L85 PathProgramCache]: Analyzing trace with hash 2033528096, now seen corresponding path program 2 times [2024-06-04 14:51:01,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:01,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257930267] [2024-06-04 14:51:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:01,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:01,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:01,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257930267] [2024-06-04 14:51:01,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257930267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:01,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:01,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:01,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574769970] [2024-06-04 14:51:01,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:01,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:01,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:01,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:02,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:02,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 273 transitions, 2603 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:02,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:02,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:02,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:03,112 INFO L124 PetriNetUnfolderBase]: 3264/4994 cut-off events. [2024-06-04 14:51:03,112 INFO L125 PetriNetUnfolderBase]: For 502237/502237 co-relation queries the response was YES. [2024-06-04 14:51:03,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39486 conditions, 4994 events. 3264/4994 cut-off events. For 502237/502237 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26735 event pairs, 907 based on Foata normal form. 1/4993 useless extension candidates. Maximal degree in co-relation 39371. Up to 4912 conditions per place. [2024-06-04 14:51:03,170 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 40 changer transitions 0/304 dead transitions. [2024-06-04 14:51:03,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 304 transitions, 3480 flow [2024-06-04 14:51:03,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:03,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-04 14:51:03,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-04 14:51:03,171 INFO L175 Difference]: Start difference. First operand has 237 places, 273 transitions, 2603 flow. Second operand 10 states and 163 transitions. [2024-06-04 14:51:03,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 304 transitions, 3480 flow [2024-06-04 14:51:03,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 304 transitions, 3346 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-04 14:51:03,952 INFO L231 Difference]: Finished difference. Result has 243 places, 276 transitions, 2616 flow [2024-06-04 14:51:03,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2616, PETRI_PLACES=243, PETRI_TRANSITIONS=276} [2024-06-04 14:51:03,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-04 14:51:03,952 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 276 transitions, 2616 flow [2024-06-04 14:51:03,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:03,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:03,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:03,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 14:51:03,953 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:03,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1747897940, now seen corresponding path program 1 times [2024-06-04 14:51:03,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:03,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102478051] [2024-06-04 14:51:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:03,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:04,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:04,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102478051] [2024-06-04 14:51:04,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102478051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:04,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:04,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:51:04,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947937301] [2024-06-04 14:51:04,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:04,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:51:04,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:04,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:51:04,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:51:05,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:05,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 276 transitions, 2616 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:05,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:05,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:05,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:06,065 INFO L124 PetriNetUnfolderBase]: 3272/5006 cut-off events. [2024-06-04 14:51:06,065 INFO L125 PetriNetUnfolderBase]: For 518239/518239 co-relation queries the response was YES. [2024-06-04 14:51:06,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39755 conditions, 5006 events. 3272/5006 cut-off events. For 518239/518239 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 26680 event pairs, 773 based on Foata normal form. 2/5006 useless extension candidates. Maximal degree in co-relation 39638. Up to 4868 conditions per place. [2024-06-04 14:51:06,121 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 44 changer transitions 0/315 dead transitions. [2024-06-04 14:51:06,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 315 transitions, 3560 flow [2024-06-04 14:51:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:51:06,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:51:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-04 14:51:06,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-04 14:51:06,122 INFO L175 Difference]: Start difference. First operand has 243 places, 276 transitions, 2616 flow. Second operand 9 states and 158 transitions. [2024-06-04 14:51:06,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 315 transitions, 3560 flow [2024-06-04 14:51:06,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 315 transitions, 3460 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 14:51:06,774 INFO L231 Difference]: Finished difference. Result has 244 places, 280 transitions, 2697 flow [2024-06-04 14:51:06,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2697, PETRI_PLACES=244, PETRI_TRANSITIONS=280} [2024-06-04 14:51:06,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-04 14:51:06,775 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 280 transitions, 2697 flow [2024-06-04 14:51:06,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:06,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:06,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:06,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 14:51:06,775 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:06,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:06,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1115695938, now seen corresponding path program 1 times [2024-06-04 14:51:06,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:06,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944986177] [2024-06-04 14:51:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:06,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:07,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:07,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944986177] [2024-06-04 14:51:07,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944986177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:07,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:07,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:51:07,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788640677] [2024-06-04 14:51:07,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:07,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:51:07,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:51:07,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:51:07,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:07,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 280 transitions, 2697 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:07,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:07,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:07,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:09,008 INFO L124 PetriNetUnfolderBase]: 3318/5070 cut-off events. [2024-06-04 14:51:09,008 INFO L125 PetriNetUnfolderBase]: For 541313/541313 co-relation queries the response was YES. [2024-06-04 14:51:09,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40648 conditions, 5070 events. 3318/5070 cut-off events. For 541313/541313 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27183 event pairs, 897 based on Foata normal form. 3/5071 useless extension candidates. Maximal degree in co-relation 40530. Up to 4857 conditions per place. [2024-06-04 14:51:09,061 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 272 selfloop transitions, 63 changer transitions 0/338 dead transitions. [2024-06-04 14:51:09,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 338 transitions, 3796 flow [2024-06-04 14:51:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:51:09,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:51:09,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-04 14:51:09,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-04 14:51:09,062 INFO L175 Difference]: Start difference. First operand has 244 places, 280 transitions, 2697 flow. Second operand 11 states and 192 transitions. [2024-06-04 14:51:09,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 338 transitions, 3796 flow [2024-06-04 14:51:09,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 338 transitions, 3691 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 14:51:09,766 INFO L231 Difference]: Finished difference. Result has 252 places, 298 transitions, 2949 flow [2024-06-04 14:51:09,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2949, PETRI_PLACES=252, PETRI_TRANSITIONS=298} [2024-06-04 14:51:09,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-04 14:51:09,767 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 298 transitions, 2949 flow [2024-06-04 14:51:09,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:09,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:09,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:09,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 14:51:09,767 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:09,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:09,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1115696248, now seen corresponding path program 2 times [2024-06-04 14:51:09,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:09,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184020095] [2024-06-04 14:51:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:09,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:10,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:10,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184020095] [2024-06-04 14:51:10,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184020095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:10,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:10,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:51:10,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465755393] [2024-06-04 14:51:10,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:10,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:51:10,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:51:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:51:10,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:10,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 298 transitions, 2949 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:10,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:10,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:10,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:11,918 INFO L124 PetriNetUnfolderBase]: 3326/5082 cut-off events. [2024-06-04 14:51:11,919 INFO L125 PetriNetUnfolderBase]: For 553933/553933 co-relation queries the response was YES. [2024-06-04 14:51:11,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41850 conditions, 5082 events. 3326/5082 cut-off events. For 553933/553933 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 27207 event pairs, 905 based on Foata normal form. 2/5082 useless extension candidates. Maximal degree in co-relation 41728. Up to 4989 conditions per place. [2024-06-04 14:51:11,972 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 286 selfloop transitions, 42 changer transitions 0/331 dead transitions. [2024-06-04 14:51:11,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 331 transitions, 3717 flow [2024-06-04 14:51:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-04 14:51:11,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-04 14:51:11,974 INFO L175 Difference]: Start difference. First operand has 252 places, 298 transitions, 2949 flow. Second operand 10 states and 165 transitions. [2024-06-04 14:51:11,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 331 transitions, 3717 flow [2024-06-04 14:51:12,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 331 transitions, 3625 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-04 14:51:12,783 INFO L231 Difference]: Finished difference. Result has 258 places, 300 transitions, 2978 flow [2024-06-04 14:51:12,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2857, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2978, PETRI_PLACES=258, PETRI_TRANSITIONS=300} [2024-06-04 14:51:12,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-04 14:51:12,784 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 300 transitions, 2978 flow [2024-06-04 14:51:12,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:12,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:12,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:12,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 14:51:12,784 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:12,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:12,784 INFO L85 PathProgramCache]: Analyzing trace with hash -997605406, now seen corresponding path program 1 times [2024-06-04 14:51:12,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:12,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002432315] [2024-06-04 14:51:12,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:12,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:13,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:13,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002432315] [2024-06-04 14:51:13,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002432315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:13,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:13,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:13,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689100641] [2024-06-04 14:51:13,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:13,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:13,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:13,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:13,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:13,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 300 transitions, 2978 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:13,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:13,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:13,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:14,622 INFO L124 PetriNetUnfolderBase]: 3336/5097 cut-off events. [2024-06-04 14:51:14,622 INFO L125 PetriNetUnfolderBase]: For 567392/567394 co-relation queries the response was YES. [2024-06-04 14:51:14,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42060 conditions, 5097 events. 3336/5097 cut-off events. For 567392/567394 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27370 event pairs, 837 based on Foata normal form. 2/5097 useless extension candidates. Maximal degree in co-relation 41936. Up to 4970 conditions per place. [2024-06-04 14:51:14,680 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 295 selfloop transitions, 30 changer transitions 0/328 dead transitions. [2024-06-04 14:51:14,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 328 transitions, 3766 flow [2024-06-04 14:51:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 14:51:14,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-04 14:51:14,682 INFO L175 Difference]: Start difference. First operand has 258 places, 300 transitions, 2978 flow. Second operand 8 states and 138 transitions. [2024-06-04 14:51:14,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 328 transitions, 3766 flow [2024-06-04 14:51:15,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 328 transitions, 3665 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 14:51:15,300 INFO L231 Difference]: Finished difference. Result has 258 places, 303 transitions, 3017 flow [2024-06-04 14:51:15,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3017, PETRI_PLACES=258, PETRI_TRANSITIONS=303} [2024-06-04 14:51:15,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-04 14:51:15,300 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 303 transitions, 3017 flow [2024-06-04 14:51:15,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:15,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:15,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:15,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 14:51:15,301 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:15,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:15,301 INFO L85 PathProgramCache]: Analyzing trace with hash -997784152, now seen corresponding path program 3 times [2024-06-04 14:51:15,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:15,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506917060] [2024-06-04 14:51:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:15,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:16,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:16,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506917060] [2024-06-04 14:51:16,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506917060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:16,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:16,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:16,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357278339] [2024-06-04 14:51:16,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:16,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:16,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:16,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:16,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:16,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:16,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 303 transitions, 3017 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:16,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:16,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:16,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:17,068 INFO L124 PetriNetUnfolderBase]: 3349/5115 cut-off events. [2024-06-04 14:51:17,068 INFO L125 PetriNetUnfolderBase]: For 583033/583035 co-relation queries the response was YES. [2024-06-04 14:51:17,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42818 conditions, 5115 events. 3349/5115 cut-off events. For 583033/583035 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27450 event pairs, 904 based on Foata normal form. 3/5116 useless extension candidates. Maximal degree in co-relation 42693. Up to 4942 conditions per place. [2024-06-04 14:51:17,130 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 73 changer transitions 0/337 dead transitions. [2024-06-04 14:51:17,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 337 transitions, 4385 flow [2024-06-04 14:51:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 14:51:17,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-04 14:51:17,131 INFO L175 Difference]: Start difference. First operand has 258 places, 303 transitions, 3017 flow. Second operand 8 states and 142 transitions. [2024-06-04 14:51:17,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 337 transitions, 4385 flow [2024-06-04 14:51:17,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 337 transitions, 4267 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 14:51:17,804 INFO L231 Difference]: Finished difference. Result has 260 places, 312 transitions, 3243 flow [2024-06-04 14:51:17,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2899, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3243, PETRI_PLACES=260, PETRI_TRANSITIONS=312} [2024-06-04 14:51:17,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-04 14:51:17,805 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 312 transitions, 3243 flow [2024-06-04 14:51:17,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:17,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:17,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:17,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 14:51:17,805 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:17,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:17,805 INFO L85 PathProgramCache]: Analyzing trace with hash -997485436, now seen corresponding path program 2 times [2024-06-04 14:51:17,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:17,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565928285] [2024-06-04 14:51:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:17,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:18,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:18,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565928285] [2024-06-04 14:51:18,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565928285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:18,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:18,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:18,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196740013] [2024-06-04 14:51:18,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:18,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:18,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:18,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:18,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:18,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:18,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 312 transitions, 3243 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:18,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:18,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:18,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:19,602 INFO L124 PetriNetUnfolderBase]: 3383/5162 cut-off events. [2024-06-04 14:51:19,602 INFO L125 PetriNetUnfolderBase]: For 613043/613045 co-relation queries the response was YES. [2024-06-04 14:51:19,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44020 conditions, 5162 events. 3383/5162 cut-off events. For 613043/613045 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27712 event pairs, 838 based on Foata normal form. 2/5162 useless extension candidates. Maximal degree in co-relation 43894. Up to 4949 conditions per place. [2024-06-04 14:51:19,666 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 287 selfloop transitions, 63 changer transitions 0/353 dead transitions. [2024-06-04 14:51:19,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 353 transitions, 4588 flow [2024-06-04 14:51:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:19,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 14:51:19,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-04 14:51:19,667 INFO L175 Difference]: Start difference. First operand has 260 places, 312 transitions, 3243 flow. Second operand 8 states and 143 transitions. [2024-06-04 14:51:19,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 353 transitions, 4588 flow [2024-06-04 14:51:20,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 353 transitions, 4407 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-04 14:51:20,374 INFO L231 Difference]: Finished difference. Result has 264 places, 328 transitions, 3504 flow [2024-06-04 14:51:20,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3068, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3504, PETRI_PLACES=264, PETRI_TRANSITIONS=328} [2024-06-04 14:51:20,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-04 14:51:20,375 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 328 transitions, 3504 flow [2024-06-04 14:51:20,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:20,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:20,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:20,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 14:51:20,376 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:20,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:20,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1704647302, now seen corresponding path program 4 times [2024-06-04 14:51:20,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:20,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263566263] [2024-06-04 14:51:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:20,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:21,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:21,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263566263] [2024-06-04 14:51:21,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263566263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:21,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:21,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:21,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134606542] [2024-06-04 14:51:21,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:21,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:21,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:21,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:21,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:21,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:21,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 328 transitions, 3504 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:21,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:21,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:21,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:22,220 INFO L124 PetriNetUnfolderBase]: 3388/5169 cut-off events. [2024-06-04 14:51:22,220 INFO L125 PetriNetUnfolderBase]: For 625219/625221 co-relation queries the response was YES. [2024-06-04 14:51:22,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44444 conditions, 5169 events. 3388/5169 cut-off events. For 625219/625221 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 27733 event pairs, 908 based on Foata normal form. 3/5170 useless extension candidates. Maximal degree in co-relation 44317. Up to 4995 conditions per place. [2024-06-04 14:51:22,285 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 75 changer transitions 0/352 dead transitions. [2024-06-04 14:51:22,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 352 transitions, 4598 flow [2024-06-04 14:51:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:22,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 14:51:22,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-04 14:51:22,286 INFO L175 Difference]: Start difference. First operand has 264 places, 328 transitions, 3504 flow. Second operand 8 states and 138 transitions. [2024-06-04 14:51:22,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 352 transitions, 4598 flow [2024-06-04 14:51:23,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 352 transitions, 4494 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-04 14:51:23,143 INFO L231 Difference]: Finished difference. Result has 270 places, 331 transitions, 3590 flow [2024-06-04 14:51:23,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3400, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3590, PETRI_PLACES=270, PETRI_TRANSITIONS=331} [2024-06-04 14:51:23,143 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-04 14:51:23,143 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 331 transitions, 3590 flow [2024-06-04 14:51:23,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:23,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:23,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:23,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 14:51:23,143 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:23,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:23,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1866347948, now seen corresponding path program 1 times [2024-06-04 14:51:23,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:23,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983344541] [2024-06-04 14:51:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:23,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:23,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:23,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983344541] [2024-06-04 14:51:23,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983344541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:23,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:23,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:23,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988078083] [2024-06-04 14:51:23,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:23,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:23,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:23,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:23,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:23,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:23,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 331 transitions, 3590 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:23,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:23,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:23,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:24,979 INFO L124 PetriNetUnfolderBase]: 3443/5245 cut-off events. [2024-06-04 14:51:24,979 INFO L125 PetriNetUnfolderBase]: For 661835/661837 co-relation queries the response was YES. [2024-06-04 14:51:25,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45602 conditions, 5245 events. 3443/5245 cut-off events. For 661835/661837 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28143 event pairs, 900 based on Foata normal form. 5/5248 useless extension candidates. Maximal degree in co-relation 45472. Up to 5050 conditions per place. [2024-06-04 14:51:25,049 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 60 changer transitions 0/374 dead transitions. [2024-06-04 14:51:25,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 374 transitions, 4925 flow [2024-06-04 14:51:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 14:51:25,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:51:25,054 INFO L175 Difference]: Start difference. First operand has 270 places, 331 transitions, 3590 flow. Second operand 8 states and 144 transitions. [2024-06-04 14:51:25,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 374 transitions, 4925 flow [2024-06-04 14:51:26,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 374 transitions, 4785 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:51:26,043 INFO L231 Difference]: Finished difference. Result has 274 places, 347 transitions, 3812 flow [2024-06-04 14:51:26,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3812, PETRI_PLACES=274, PETRI_TRANSITIONS=347} [2024-06-04 14:51:26,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-04 14:51:26,043 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 347 transitions, 3812 flow [2024-06-04 14:51:26,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:26,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:26,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:26,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 14:51:26,043 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:26,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:26,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2043479096, now seen corresponding path program 5 times [2024-06-04 14:51:26,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:26,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807538580] [2024-06-04 14:51:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:26,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:26,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:26,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807538580] [2024-06-04 14:51:26,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807538580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:26,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:26,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:26,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163296083] [2024-06-04 14:51:26,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:26,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:26,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:26,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:26,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:26,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:26,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 347 transitions, 3812 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:26,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:26,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:26,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:27,856 INFO L124 PetriNetUnfolderBase]: 3464/5274 cut-off events. [2024-06-04 14:51:27,856 INFO L125 PetriNetUnfolderBase]: For 680404/680406 co-relation queries the response was YES. [2024-06-04 14:51:27,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46733 conditions, 5274 events. 3464/5274 cut-off events. For 680404/680406 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28299 event pairs, 895 based on Foata normal form. 3/5275 useless extension candidates. Maximal degree in co-relation 46601. Up to 5095 conditions per place. [2024-06-04 14:51:27,922 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 288 selfloop transitions, 84 changer transitions 0/375 dead transitions. [2024-06-04 14:51:27,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 375 transitions, 5209 flow [2024-06-04 14:51:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:27,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:27,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:51:27,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:51:27,924 INFO L175 Difference]: Start difference. First operand has 274 places, 347 transitions, 3812 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:51:27,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 375 transitions, 5209 flow [2024-06-04 14:51:29,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 375 transitions, 5129 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-04 14:51:29,185 INFO L231 Difference]: Finished difference. Result has 280 places, 356 transitions, 4037 flow [2024-06-04 14:51:29,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3732, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4037, PETRI_PLACES=280, PETRI_TRANSITIONS=356} [2024-06-04 14:51:29,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-04 14:51:29,185 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 356 transitions, 4037 flow [2024-06-04 14:51:29,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:29,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:29,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:29,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 14:51:29,186 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:29,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:29,186 INFO L85 PathProgramCache]: Analyzing trace with hash -820474072, now seen corresponding path program 6 times [2024-06-04 14:51:29,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:29,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229583768] [2024-06-04 14:51:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:29,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:29,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:29,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229583768] [2024-06-04 14:51:29,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229583768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:29,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:29,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:29,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340547791] [2024-06-04 14:51:29,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:29,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:29,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:29,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:29,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:30,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:30,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 356 transitions, 4037 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:30,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:30,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:30,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:31,234 INFO L124 PetriNetUnfolderBase]: 3461/5269 cut-off events. [2024-06-04 14:51:31,235 INFO L125 PetriNetUnfolderBase]: For 692193/692193 co-relation queries the response was YES. [2024-06-04 14:51:31,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46735 conditions, 5269 events. 3461/5269 cut-off events. For 692193/692193 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28247 event pairs, 892 based on Foata normal form. 1/5268 useless extension candidates. Maximal degree in co-relation 46600. Up to 5205 conditions per place. [2024-06-04 14:51:31,299 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 30 changer transitions 0/372 dead transitions. [2024-06-04 14:51:31,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 372 transitions, 4817 flow [2024-06-04 14:51:31,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 14:51:31,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-04 14:51:31,300 INFO L175 Difference]: Start difference. First operand has 280 places, 356 transitions, 4037 flow. Second operand 8 states and 129 transitions. [2024-06-04 14:51:31,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 372 transitions, 4817 flow [2024-06-04 14:51:32,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 372 transitions, 4686 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-04 14:51:32,532 INFO L231 Difference]: Finished difference. Result has 285 places, 356 transitions, 3972 flow [2024-06-04 14:51:32,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3972, PETRI_PLACES=285, PETRI_TRANSITIONS=356} [2024-06-04 14:51:32,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-04 14:51:32,533 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 356 transitions, 3972 flow [2024-06-04 14:51:32,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:32,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:32,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:32,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 14:51:32,533 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:32,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:32,533 INFO L85 PathProgramCache]: Analyzing trace with hash -820116580, now seen corresponding path program 2 times [2024-06-04 14:51:32,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:32,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562209939] [2024-06-04 14:51:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:32,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:33,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:33,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562209939] [2024-06-04 14:51:33,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562209939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:33,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:33,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:33,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936296638] [2024-06-04 14:51:33,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:33,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:33,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:33,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:33,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:33,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:33,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 356 transitions, 3972 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:33,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:33,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:33,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:34,418 INFO L124 PetriNetUnfolderBase]: 3524/5357 cut-off events. [2024-06-04 14:51:34,419 INFO L125 PetriNetUnfolderBase]: For 735780/735782 co-relation queries the response was YES. [2024-06-04 14:51:34,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47842 conditions, 5357 events. 3524/5357 cut-off events. For 735780/735782 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28767 event pairs, 898 based on Foata normal form. 5/5360 useless extension candidates. Maximal degree in co-relation 47706. Up to 5131 conditions per place. [2024-06-04 14:51:34,481 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 70 changer transitions 0/390 dead transitions. [2024-06-04 14:51:34,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 390 transitions, 5285 flow [2024-06-04 14:51:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 14:51:34,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-04 14:51:34,482 INFO L175 Difference]: Start difference. First operand has 285 places, 356 transitions, 3972 flow. Second operand 8 states and 141 transitions. [2024-06-04 14:51:34,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 390 transitions, 5285 flow [2024-06-04 14:51:35,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 390 transitions, 5217 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 14:51:35,843 INFO L231 Difference]: Finished difference. Result has 286 places, 366 transitions, 4189 flow [2024-06-04 14:51:35,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3904, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4189, PETRI_PLACES=286, PETRI_TRANSITIONS=366} [2024-06-04 14:51:35,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-04 14:51:35,843 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 366 transitions, 4189 flow [2024-06-04 14:51:35,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:35,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:35,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:35,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 14:51:35,844 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:35,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:35,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1551527482, now seen corresponding path program 3 times [2024-06-04 14:51:35,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:35,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405138427] [2024-06-04 14:51:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:35,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:36,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:36,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405138427] [2024-06-04 14:51:36,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405138427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:36,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:36,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:36,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297242530] [2024-06-04 14:51:36,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:36,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:36,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:36,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:36,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:36,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:36,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 366 transitions, 4189 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:36,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:36,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:36,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:37,745 INFO L124 PetriNetUnfolderBase]: 3515/5345 cut-off events. [2024-06-04 14:51:37,745 INFO L125 PetriNetUnfolderBase]: For 743186/743188 co-relation queries the response was YES. [2024-06-04 14:51:37,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47924 conditions, 5345 events. 3515/5345 cut-off events. For 743186/743188 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28731 event pairs, 892 based on Foata normal form. 5/5348 useless extension candidates. Maximal degree in co-relation 47787. Up to 5124 conditions per place. [2024-06-04 14:51:37,815 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 68 changer transitions 0/392 dead transitions. [2024-06-04 14:51:37,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 392 transitions, 5381 flow [2024-06-04 14:51:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:37,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 14:51:37,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:51:37,816 INFO L175 Difference]: Start difference. First operand has 286 places, 366 transitions, 4189 flow. Second operand 8 states and 144 transitions. [2024-06-04 14:51:37,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 392 transitions, 5381 flow [2024-06-04 14:51:39,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 392 transitions, 5241 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 14:51:39,074 INFO L231 Difference]: Finished difference. Result has 290 places, 366 transitions, 4191 flow [2024-06-04 14:51:39,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4049, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4191, PETRI_PLACES=290, PETRI_TRANSITIONS=366} [2024-06-04 14:51:39,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-04 14:51:39,075 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 366 transitions, 4191 flow [2024-06-04 14:51:39,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:39,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:39,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:39,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 14:51:39,076 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:39,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash -820353916, now seen corresponding path program 3 times [2024-06-04 14:51:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:39,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507068376] [2024-06-04 14:51:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:39,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:39,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:39,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507068376] [2024-06-04 14:51:39,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507068376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:39,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:39,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:39,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226976694] [2024-06-04 14:51:39,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:39,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:39,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:39,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:39,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:39,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:39,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 366 transitions, 4191 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:39,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:39,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:39,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:41,039 INFO L124 PetriNetUnfolderBase]: 3541/5381 cut-off events. [2024-06-04 14:51:41,040 INFO L125 PetriNetUnfolderBase]: For 764512/764514 co-relation queries the response was YES. [2024-06-04 14:51:41,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48502 conditions, 5381 events. 3541/5381 cut-off events. For 764512/764514 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 28871 event pairs, 872 based on Foata normal form. 2/5381 useless extension candidates. Maximal degree in co-relation 48364. Up to 5157 conditions per place. [2024-06-04 14:51:41,111 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 71 changer transitions 0/393 dead transitions. [2024-06-04 14:51:41,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 393 transitions, 5501 flow [2024-06-04 14:51:41,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 14:51:41,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-04 14:51:41,112 INFO L175 Difference]: Start difference. First operand has 290 places, 366 transitions, 4191 flow. Second operand 8 states and 138 transitions. [2024-06-04 14:51:41,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 393 transitions, 5501 flow [2024-06-04 14:51:42,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 393 transitions, 5403 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 14:51:42,362 INFO L231 Difference]: Finished difference. Result has 294 places, 372 transitions, 4375 flow [2024-06-04 14:51:42,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4093, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4375, PETRI_PLACES=294, PETRI_TRANSITIONS=372} [2024-06-04 14:51:42,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-04 14:51:42,363 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 372 transitions, 4375 flow [2024-06-04 14:51:42,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:42,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:42,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:42,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 14:51:42,363 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:42,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:42,363 INFO L85 PathProgramCache]: Analyzing trace with hash 863183988, now seen corresponding path program 2 times [2024-06-04 14:51:42,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:42,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324353843] [2024-06-04 14:51:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:42,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:43,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:43,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324353843] [2024-06-04 14:51:43,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324353843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:43,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:43,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:51:43,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542583289] [2024-06-04 14:51:43,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:43,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:51:43,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:43,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:51:43,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:51:43,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:43,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 372 transitions, 4375 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:43,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:43,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:43,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:44,515 INFO L124 PetriNetUnfolderBase]: 3571/5422 cut-off events. [2024-06-04 14:51:44,516 INFO L125 PetriNetUnfolderBase]: For 786103/786103 co-relation queries the response was YES. [2024-06-04 14:51:44,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48971 conditions, 5422 events. 3571/5422 cut-off events. For 786103/786103 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29144 event pairs, 887 based on Foata normal form. 3/5423 useless extension candidates. Maximal degree in co-relation 48832. Up to 5261 conditions per place. [2024-06-04 14:51:44,589 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 348 selfloop transitions, 52 changer transitions 0/403 dead transitions. [2024-06-04 14:51:44,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 403 transitions, 5331 flow [2024-06-04 14:51:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:51:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:51:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-04 14:51:44,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-04 14:51:44,590 INFO L175 Difference]: Start difference. First operand has 294 places, 372 transitions, 4375 flow. Second operand 9 states and 152 transitions. [2024-06-04 14:51:44,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 403 transitions, 5331 flow [2024-06-04 14:51:45,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 403 transitions, 5196 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-04 14:51:45,656 INFO L231 Difference]: Finished difference. Result has 299 places, 379 transitions, 4439 flow [2024-06-04 14:51:45,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4240, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4439, PETRI_PLACES=299, PETRI_TRANSITIONS=379} [2024-06-04 14:51:45,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-04 14:51:45,657 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 379 transitions, 4439 flow [2024-06-04 14:51:45,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:45,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:45,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:45,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 14:51:45,658 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:45,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:45,658 INFO L85 PathProgramCache]: Analyzing trace with hash -820466508, now seen corresponding path program 3 times [2024-06-04 14:51:45,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:45,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111335719] [2024-06-04 14:51:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:45,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:46,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:46,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111335719] [2024-06-04 14:51:46,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111335719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:46,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:46,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:51:46,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57585305] [2024-06-04 14:51:46,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:46,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:51:46,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:46,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:51:46,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:51:46,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:46,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 379 transitions, 4439 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:46,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:46,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:46,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:48,002 INFO L124 PetriNetUnfolderBase]: 3586/5443 cut-off events. [2024-06-04 14:51:48,002 INFO L125 PetriNetUnfolderBase]: For 804092/804092 co-relation queries the response was YES. [2024-06-04 14:51:48,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49307 conditions, 5443 events. 3586/5443 cut-off events. For 804092/804092 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 29269 event pairs, 887 based on Foata normal form. 3/5444 useless extension candidates. Maximal degree in co-relation 49167. Up to 5282 conditions per place. [2024-06-04 14:51:48,076 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 355 selfloop transitions, 51 changer transitions 0/409 dead transitions. [2024-06-04 14:51:48,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 409 transitions, 5403 flow [2024-06-04 14:51:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:51:48,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:51:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 14:51:48,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-04 14:51:48,077 INFO L175 Difference]: Start difference. First operand has 299 places, 379 transitions, 4439 flow. Second operand 9 states and 155 transitions. [2024-06-04 14:51:48,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 409 transitions, 5403 flow [2024-06-04 14:51:49,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 409 transitions, 5268 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 14:51:49,360 INFO L231 Difference]: Finished difference. Result has 302 places, 383 transitions, 4487 flow [2024-06-04 14:51:49,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4304, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4487, PETRI_PLACES=302, PETRI_TRANSITIONS=383} [2024-06-04 14:51:49,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-04 14:51:49,360 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 383 transitions, 4487 flow [2024-06-04 14:51:49,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:49,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:49,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:49,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 14:51:49,361 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:49,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:49,361 INFO L85 PathProgramCache]: Analyzing trace with hash -820477048, now seen corresponding path program 3 times [2024-06-04 14:51:49,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:49,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732351687] [2024-06-04 14:51:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:49,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:50,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:50,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732351687] [2024-06-04 14:51:50,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732351687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:50,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:50,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:51:50,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063859952] [2024-06-04 14:51:50,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:50,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:51:50,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:50,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:51:50,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:51:50,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:50,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 383 transitions, 4487 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:50,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:50,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:50,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:51,711 INFO L124 PetriNetUnfolderBase]: 3594/5455 cut-off events. [2024-06-04 14:51:51,711 INFO L125 PetriNetUnfolderBase]: For 817750/817750 co-relation queries the response was YES. [2024-06-04 14:51:51,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49542 conditions, 5455 events. 3594/5455 cut-off events. For 817750/817750 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 29330 event pairs, 909 based on Foata normal form. 2/5455 useless extension candidates. Maximal degree in co-relation 49401. Up to 5385 conditions per place. [2024-06-04 14:51:51,784 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 368 selfloop transitions, 32 changer transitions 0/403 dead transitions. [2024-06-04 14:51:51,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 403 transitions, 5365 flow [2024-06-04 14:51:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:51:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:51:51,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-04 14:51:51,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-04 14:51:51,785 INFO L175 Difference]: Start difference. First operand has 302 places, 383 transitions, 4487 flow. Second operand 9 states and 141 transitions. [2024-06-04 14:51:51,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 403 transitions, 5365 flow [2024-06-04 14:51:53,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 403 transitions, 5238 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-04 14:51:53,023 INFO L231 Difference]: Finished difference. Result has 306 places, 385 transitions, 4465 flow [2024-06-04 14:51:53,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4360, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4465, PETRI_PLACES=306, PETRI_TRANSITIONS=385} [2024-06-04 14:51:53,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-04 14:51:53,024 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 385 transitions, 4465 flow [2024-06-04 14:51:53,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:53,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:53,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:53,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 14:51:53,025 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:53,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:53,025 INFO L85 PathProgramCache]: Analyzing trace with hash -820476738, now seen corresponding path program 4 times [2024-06-04 14:51:53,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:53,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162459015] [2024-06-04 14:51:53,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:53,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:53,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:53,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162459015] [2024-06-04 14:51:53,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162459015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:53,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:53,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:51:53,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700281176] [2024-06-04 14:51:53,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:53,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:51:53,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:53,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:51:53,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:51:54,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:54,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 385 transitions, 4465 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:54,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:54,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:54,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:55,329 INFO L124 PetriNetUnfolderBase]: 3599/5462 cut-off events. [2024-06-04 14:51:55,329 INFO L125 PetriNetUnfolderBase]: For 831659/831659 co-relation queries the response was YES. [2024-06-04 14:51:55,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49635 conditions, 5462 events. 3599/5462 cut-off events. For 831659/831659 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 29377 event pairs, 889 based on Foata normal form. 1/5461 useless extension candidates. Maximal degree in co-relation 49493. Up to 5284 conditions per place. [2024-06-04 14:51:55,402 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 61 changer transitions 0/416 dead transitions. [2024-06-04 14:51:55,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 416 transitions, 5440 flow [2024-06-04 14:51:55,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-04 14:51:55,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:51:55,403 INFO L175 Difference]: Start difference. First operand has 306 places, 385 transitions, 4465 flow. Second operand 10 states and 170 transitions. [2024-06-04 14:51:55,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 416 transitions, 5440 flow [2024-06-04 14:51:56,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 416 transitions, 5355 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-04 14:51:56,606 INFO L231 Difference]: Finished difference. Result has 309 places, 388 transitions, 4578 flow [2024-06-04 14:51:56,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4578, PETRI_PLACES=309, PETRI_TRANSITIONS=388} [2024-06-04 14:51:56,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-04 14:51:56,607 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 388 transitions, 4578 flow [2024-06-04 14:51:56,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:56,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:56,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:56,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 14:51:56,607 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:56,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:56,608 INFO L85 PathProgramCache]: Analyzing trace with hash -864703852, now seen corresponding path program 7 times [2024-06-04 14:51:56,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:56,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846276489] [2024-06-04 14:51:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:56,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:57,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:57,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846276489] [2024-06-04 14:51:57,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846276489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:57,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:57,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:57,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940539266] [2024-06-04 14:51:57,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:57,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:57,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:57,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:57,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:57,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:51:57,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 388 transitions, 4578 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:57,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:57,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:51:57,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:58,586 INFO L124 PetriNetUnfolderBase]: 3604/5469 cut-off events. [2024-06-04 14:51:58,586 INFO L125 PetriNetUnfolderBase]: For 849780/849780 co-relation queries the response was YES. [2024-06-04 14:51:58,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50021 conditions, 5469 events. 3604/5469 cut-off events. For 849780/849780 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29396 event pairs, 907 based on Foata normal form. 1/5468 useless extension candidates. Maximal degree in co-relation 49878. Up to 5398 conditions per place. [2024-06-04 14:51:58,660 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 369 selfloop transitions, 39 changer transitions 0/411 dead transitions. [2024-06-04 14:51:58,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 411 transitions, 5671 flow [2024-06-04 14:51:58,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:58,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 14:51:58,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-04 14:51:58,661 INFO L175 Difference]: Start difference. First operand has 309 places, 388 transitions, 4578 flow. Second operand 8 states and 133 transitions. [2024-06-04 14:51:58,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 411 transitions, 5671 flow [2024-06-04 14:51:59,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 411 transitions, 5520 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-04 14:51:59,924 INFO L231 Difference]: Finished difference. Result has 309 places, 391 transitions, 4562 flow [2024-06-04 14:51:59,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4427, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4562, PETRI_PLACES=309, PETRI_TRANSITIONS=391} [2024-06-04 14:51:59,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-04 14:51:59,925 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 391 transitions, 4562 flow [2024-06-04 14:51:59,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:59,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:59,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:59,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 14:51:59,925 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:59,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:59,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1722176090, now seen corresponding path program 4 times [2024-06-04 14:51:59,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:59,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632705367] [2024-06-04 14:51:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:59,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:00,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:00,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632705367] [2024-06-04 14:52:00,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632705367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:00,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:00,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:00,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807938367] [2024-06-04 14:52:00,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:00,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:00,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:00,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:00,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:00,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:00,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 391 transitions, 4562 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:00,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:00,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:00,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:01,963 INFO L124 PetriNetUnfolderBase]: 3614/5483 cut-off events. [2024-06-04 14:52:01,963 INFO L125 PetriNetUnfolderBase]: For 871893/871893 co-relation queries the response was YES. [2024-06-04 14:52:02,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50226 conditions, 5483 events. 3614/5483 cut-off events. For 871893/871893 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 29457 event pairs, 894 based on Foata normal form. 2/5483 useless extension candidates. Maximal degree in co-relation 50082. Up to 5399 conditions per place. [2024-06-04 14:52:02,041 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 390 selfloop transitions, 23 changer transitions 0/416 dead transitions. [2024-06-04 14:52:02,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 416 transitions, 5521 flow [2024-06-04 14:52:02,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 14:52:02,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-04 14:52:02,042 INFO L175 Difference]: Start difference. First operand has 309 places, 391 transitions, 4562 flow. Second operand 8 states and 133 transitions. [2024-06-04 14:52:02,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 416 transitions, 5521 flow [2024-06-04 14:52:03,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 416 transitions, 5304 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-04 14:52:03,405 INFO L231 Difference]: Finished difference. Result has 309 places, 394 transitions, 4470 flow [2024-06-04 14:52:03,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4345, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4470, PETRI_PLACES=309, PETRI_TRANSITIONS=394} [2024-06-04 14:52:03,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-04 14:52:03,406 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 394 transitions, 4470 flow [2024-06-04 14:52:03,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:03,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:03,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:03,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 14:52:03,406 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:03,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:03,406 INFO L85 PathProgramCache]: Analyzing trace with hash -123534500, now seen corresponding path program 5 times [2024-06-04 14:52:03,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:03,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267688955] [2024-06-04 14:52:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:03,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:04,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:04,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267688955] [2024-06-04 14:52:04,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267688955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:04,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:04,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:04,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576784382] [2024-06-04 14:52:04,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:04,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:04,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:04,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:04,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:04,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:04,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 394 transitions, 4470 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:04,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:04,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:04,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:05,361 INFO L124 PetriNetUnfolderBase]: 3640/5519 cut-off events. [2024-06-04 14:52:05,361 INFO L125 PetriNetUnfolderBase]: For 899176/899176 co-relation queries the response was YES. [2024-06-04 14:52:05,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50750 conditions, 5519 events. 3640/5519 cut-off events. For 899176/899176 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29716 event pairs, 894 based on Foata normal form. 2/5519 useless extension candidates. Maximal degree in co-relation 50607. Up to 5450 conditions per place. [2024-06-04 14:52:05,435 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 24 changer transitions 0/424 dead transitions. [2024-06-04 14:52:05,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 424 transitions, 5711 flow [2024-06-04 14:52:05,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:52:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:52:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-04 14:52:05,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:52:05,436 INFO L175 Difference]: Start difference. First operand has 309 places, 394 transitions, 4470 flow. Second operand 9 states and 144 transitions. [2024-06-04 14:52:05,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 424 transitions, 5711 flow [2024-06-04 14:52:06,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 424 transitions, 5617 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:06,881 INFO L231 Difference]: Finished difference. Result has 314 places, 401 transitions, 4611 flow [2024-06-04 14:52:06,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4376, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4611, PETRI_PLACES=314, PETRI_TRANSITIONS=401} [2024-06-04 14:52:06,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-04 14:52:06,881 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 401 transitions, 4611 flow [2024-06-04 14:52:06,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:06,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:06,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:06,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 14:52:06,882 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:06,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:06,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1722180926, now seen corresponding path program 4 times [2024-06-04 14:52:06,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:06,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337206756] [2024-06-04 14:52:06,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:06,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:07,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:07,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337206756] [2024-06-04 14:52:07,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337206756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:07,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:07,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:07,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819949617] [2024-06-04 14:52:07,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:07,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:07,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:07,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:07,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:07,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:07,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 401 transitions, 4611 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:07,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:07,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:07,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:08,905 INFO L124 PetriNetUnfolderBase]: 3631/5507 cut-off events. [2024-06-04 14:52:08,906 INFO L125 PetriNetUnfolderBase]: For 909781/909781 co-relation queries the response was YES. [2024-06-04 14:52:08,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50627 conditions, 5507 events. 3631/5507 cut-off events. For 909781/909781 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29667 event pairs, 896 based on Foata normal form. 3/5508 useless extension candidates. Maximal degree in co-relation 50481. Up to 5415 conditions per place. [2024-06-04 14:52:08,987 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 380 selfloop transitions, 39 changer transitions 0/422 dead transitions. [2024-06-04 14:52:08,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 422 transitions, 5693 flow [2024-06-04 14:52:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:08,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:52:08,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:52:08,988 INFO L175 Difference]: Start difference. First operand has 314 places, 401 transitions, 4611 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:52:08,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 422 transitions, 5693 flow [2024-06-04 14:52:10,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 422 transitions, 5567 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-04 14:52:10,246 INFO L231 Difference]: Finished difference. Result has 317 places, 401 transitions, 4569 flow [2024-06-04 14:52:10,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4485, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4569, PETRI_PLACES=317, PETRI_TRANSITIONS=401} [2024-06-04 14:52:10,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-04 14:52:10,247 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 401 transitions, 4569 flow [2024-06-04 14:52:10,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:10,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:10,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:10,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 14:52:10,247 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:10,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:10,247 INFO L85 PathProgramCache]: Analyzing trace with hash -625484416, now seen corresponding path program 6 times [2024-06-04 14:52:10,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:10,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002127447] [2024-06-04 14:52:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:10,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:10,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:10,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002127447] [2024-06-04 14:52:10,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002127447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:10,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:10,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:10,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849477516] [2024-06-04 14:52:10,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:10,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:10,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:10,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:10,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:11,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:11,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 401 transitions, 4569 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:11,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:11,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:11,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:12,313 INFO L124 PetriNetUnfolderBase]: 3625/5499 cut-off events. [2024-06-04 14:52:12,313 INFO L125 PetriNetUnfolderBase]: For 914926/914926 co-relation queries the response was YES. [2024-06-04 14:52:12,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50464 conditions, 5499 events. 3625/5499 cut-off events. For 914926/914926 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29590 event pairs, 893 based on Foata normal form. 2/5499 useless extension candidates. Maximal degree in co-relation 50317. Up to 5459 conditions per place. [2024-06-04 14:52:12,388 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 18 changer transitions 0/418 dead transitions. [2024-06-04 14:52:12,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 418 transitions, 5445 flow [2024-06-04 14:52:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-04 14:52:12,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-04 14:52:12,389 INFO L175 Difference]: Start difference. First operand has 317 places, 401 transitions, 4569 flow. Second operand 8 states and 126 transitions. [2024-06-04 14:52:12,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 418 transitions, 5445 flow [2024-06-04 14:52:13,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 418 transitions, 5289 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 14:52:13,811 INFO L231 Difference]: Finished difference. Result has 318 places, 401 transitions, 4455 flow [2024-06-04 14:52:13,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4455, PETRI_PLACES=318, PETRI_TRANSITIONS=401} [2024-06-04 14:52:13,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-04 14:52:13,812 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 401 transitions, 4455 flow [2024-06-04 14:52:13,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:13,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:13,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:13,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 14:52:13,812 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:13,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:13,812 INFO L85 PathProgramCache]: Analyzing trace with hash -129670826, now seen corresponding path program 8 times [2024-06-04 14:52:13,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:13,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651293620] [2024-06-04 14:52:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:13,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:14,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:14,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651293620] [2024-06-04 14:52:14,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651293620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:14,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:14,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:14,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050489622] [2024-06-04 14:52:14,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:14,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:14,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:14,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:14,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:14,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:14,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 401 transitions, 4455 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:14,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:14,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:14,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:15,714 INFO L124 PetriNetUnfolderBase]: 3622/5495 cut-off events. [2024-06-04 14:52:15,714 INFO L125 PetriNetUnfolderBase]: For 923990/923990 co-relation queries the response was YES. [2024-06-04 14:52:15,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50394 conditions, 5495 events. 3622/5495 cut-off events. For 923990/923990 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29559 event pairs, 894 based on Foata normal form. 1/5494 useless extension candidates. Maximal degree in co-relation 50248. Up to 5425 conditions per place. [2024-06-04 14:52:15,787 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 378 selfloop transitions, 37 changer transitions 0/418 dead transitions. [2024-06-04 14:52:15,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 418 transitions, 5513 flow [2024-06-04 14:52:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:15,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 14:52:15,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-04 14:52:15,788 INFO L175 Difference]: Start difference. First operand has 318 places, 401 transitions, 4455 flow. Second operand 8 states and 131 transitions. [2024-06-04 14:52:15,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 418 transitions, 5513 flow [2024-06-04 14:52:17,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 418 transitions, 5455 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:17,264 INFO L231 Difference]: Finished difference. Result has 320 places, 401 transitions, 4477 flow [2024-06-04 14:52:17,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4397, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4477, PETRI_PLACES=320, PETRI_TRANSITIONS=401} [2024-06-04 14:52:17,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-04 14:52:17,265 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 401 transitions, 4477 flow [2024-06-04 14:52:17,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:17,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:17,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:17,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 14:52:17,265 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:17,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:17,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1722180740, now seen corresponding path program 7 times [2024-06-04 14:52:17,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:17,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182148563] [2024-06-04 14:52:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:17,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:17,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:17,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182148563] [2024-06-04 14:52:17,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182148563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:17,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:17,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:17,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756443062] [2024-06-04 14:52:17,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:17,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:17,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:17,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:17,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:18,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:18,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 401 transitions, 4477 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:18,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:18,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:18,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:19,224 INFO L124 PetriNetUnfolderBase]: 3616/5487 cut-off events. [2024-06-04 14:52:19,224 INFO L125 PetriNetUnfolderBase]: For 938470/938470 co-relation queries the response was YES. [2024-06-04 14:52:19,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50352 conditions, 5487 events. 3616/5487 cut-off events. For 938470/938470 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29540 event pairs, 884 based on Foata normal form. 2/5487 useless extension candidates. Maximal degree in co-relation 50205. Up to 5341 conditions per place. [2024-06-04 14:52:19,302 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 365 selfloop transitions, 53 changer transitions 0/421 dead transitions. [2024-06-04 14:52:19,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 421 transitions, 5561 flow [2024-06-04 14:52:19,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 14:52:19,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-04 14:52:19,303 INFO L175 Difference]: Start difference. First operand has 320 places, 401 transitions, 4477 flow. Second operand 8 states and 135 transitions. [2024-06-04 14:52:19,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 421 transitions, 5561 flow [2024-06-04 14:52:21,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 421 transitions, 5440 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:21,529 INFO L231 Difference]: Finished difference. Result has 322 places, 401 transitions, 4468 flow [2024-06-04 14:52:21,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4356, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4468, PETRI_PLACES=322, PETRI_TRANSITIONS=401} [2024-06-04 14:52:21,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-04 14:52:21,530 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 401 transitions, 4468 flow [2024-06-04 14:52:21,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:21,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:21,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:21,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 14:52:21,530 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:21,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:21,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2076859676, now seen corresponding path program 5 times [2024-06-04 14:52:21,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:21,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940995209] [2024-06-04 14:52:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:21,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:22,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:22,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940995209] [2024-06-04 14:52:22,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940995209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:22,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:22,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:22,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652219073] [2024-06-04 14:52:22,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:22,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:22,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:22,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:22,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:22,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:22,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 401 transitions, 4468 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:22,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:22,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:22,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:23,507 INFO L124 PetriNetUnfolderBase]: 3631/5508 cut-off events. [2024-06-04 14:52:23,507 INFO L125 PetriNetUnfolderBase]: For 962217/962217 co-relation queries the response was YES. [2024-06-04 14:52:23,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50733 conditions, 5508 events. 3631/5508 cut-off events. For 962217/962217 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29641 event pairs, 898 based on Foata normal form. 3/5509 useless extension candidates. Maximal degree in co-relation 50585. Up to 5456 conditions per place. [2024-06-04 14:52:23,585 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 29 changer transitions 0/420 dead transitions. [2024-06-04 14:52:23,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 420 transitions, 5397 flow [2024-06-04 14:52:23,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 14:52:23,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:52:23,586 INFO L175 Difference]: Start difference. First operand has 322 places, 401 transitions, 4468 flow. Second operand 8 states and 128 transitions. [2024-06-04 14:52:23,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 420 transitions, 5397 flow [2024-06-04 14:52:25,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 420 transitions, 5203 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-04 14:52:25,792 INFO L231 Difference]: Finished difference. Result has 323 places, 405 transitions, 4397 flow [2024-06-04 14:52:25,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4274, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4397, PETRI_PLACES=323, PETRI_TRANSITIONS=405} [2024-06-04 14:52:25,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-04 14:52:25,792 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 405 transitions, 4397 flow [2024-06-04 14:52:25,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:25,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:25,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:25,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 14:52:25,793 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:25,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:25,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2076443780, now seen corresponding path program 8 times [2024-06-04 14:52:25,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:25,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014086322] [2024-06-04 14:52:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:25,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:26,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:26,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014086322] [2024-06-04 14:52:26,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014086322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:26,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:26,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:26,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008728797] [2024-06-04 14:52:26,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:26,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:26,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:26,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:26,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:26,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 405 transitions, 4397 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:26,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:26,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:26,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:27,767 INFO L124 PetriNetUnfolderBase]: 3657/5544 cut-off events. [2024-06-04 14:52:27,767 INFO L125 PetriNetUnfolderBase]: For 986269/986269 co-relation queries the response was YES. [2024-06-04 14:52:27,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51281 conditions, 5544 events. 3657/5544 cut-off events. For 986269/986269 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 29860 event pairs, 898 based on Foata normal form. 2/5544 useless extension candidates. Maximal degree in co-relation 51133. Up to 5471 conditions per place. [2024-06-04 14:52:27,847 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 38 changer transitions 0/428 dead transitions. [2024-06-04 14:52:27,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 428 transitions, 5636 flow [2024-06-04 14:52:27,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-04 14:52:27,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-04 14:52:27,848 INFO L175 Difference]: Start difference. First operand has 323 places, 405 transitions, 4397 flow. Second operand 8 states and 130 transitions. [2024-06-04 14:52:27,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 428 transitions, 5636 flow [2024-06-04 14:52:29,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 428 transitions, 5532 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:29,785 INFO L231 Difference]: Finished difference. Result has 325 places, 412 transitions, 4532 flow [2024-06-04 14:52:29,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4293, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4532, PETRI_PLACES=325, PETRI_TRANSITIONS=412} [2024-06-04 14:52:29,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-04 14:52:29,786 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 412 transitions, 4532 flow [2024-06-04 14:52:29,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:29,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:29,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:29,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 14:52:29,786 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:29,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:29,786 INFO L85 PathProgramCache]: Analyzing trace with hash -510430210, now seen corresponding path program 6 times [2024-06-04 14:52:29,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:29,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941798123] [2024-06-04 14:52:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:30,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:30,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941798123] [2024-06-04 14:52:30,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941798123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:30,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:30,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:30,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517743156] [2024-06-04 14:52:30,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:30,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:30,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:30,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:30,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:30,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:30,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 412 transitions, 4532 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:30,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:30,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:30,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:31,767 INFO L124 PetriNetUnfolderBase]: 3672/5565 cut-off events. [2024-06-04 14:52:31,768 INFO L125 PetriNetUnfolderBase]: For 1010188/1010188 co-relation queries the response was YES. [2024-06-04 14:52:31,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51462 conditions, 5565 events. 3672/5565 cut-off events. For 1010188/1010188 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 29980 event pairs, 895 based on Foata normal form. 3/5566 useless extension candidates. Maximal degree in co-relation 51314. Up to 5501 conditions per place. [2024-06-04 14:52:31,846 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 395 selfloop transitions, 34 changer transitions 0/432 dead transitions. [2024-06-04 14:52:31,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 432 transitions, 5496 flow [2024-06-04 14:52:31,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:31,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:31,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 14:52:31,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-04 14:52:31,847 INFO L175 Difference]: Start difference. First operand has 325 places, 412 transitions, 4532 flow. Second operand 8 states and 132 transitions. [2024-06-04 14:52:31,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 432 transitions, 5496 flow [2024-06-04 14:52:33,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 432 transitions, 5403 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-04 14:52:33,773 INFO L231 Difference]: Finished difference. Result has 330 places, 415 transitions, 4573 flow [2024-06-04 14:52:33,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4439, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=330, PETRI_TRANSITIONS=415} [2024-06-04 14:52:33,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-04 14:52:33,774 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 415 transitions, 4573 flow [2024-06-04 14:52:33,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:33,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:33,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:33,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 14:52:33,774 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:33,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:33,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1732357544, now seen corresponding path program 9 times [2024-06-04 14:52:33,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:33,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93249298] [2024-06-04 14:52:33,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:33,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:34,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:34,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93249298] [2024-06-04 14:52:34,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93249298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:34,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:34,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:34,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586736084] [2024-06-04 14:52:34,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:34,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:34,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:34,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:34,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:34,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:34,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 415 transitions, 4573 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:34,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:34,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:34,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:35,701 INFO L124 PetriNetUnfolderBase]: 3677/5572 cut-off events. [2024-06-04 14:52:35,702 INFO L125 PetriNetUnfolderBase]: For 1019984/1019984 co-relation queries the response was YES. [2024-06-04 14:52:35,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51731 conditions, 5572 events. 3677/5572 cut-off events. For 1019984/1019984 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29994 event pairs, 898 based on Foata normal form. 1/5571 useless extension candidates. Maximal degree in co-relation 51581. Up to 5535 conditions per place. [2024-06-04 14:52:35,781 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 405 selfloop transitions, 23 changer transitions 0/431 dead transitions. [2024-06-04 14:52:35,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 431 transitions, 5503 flow [2024-06-04 14:52:35,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:52:35,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-04 14:52:35,782 INFO L175 Difference]: Start difference. First operand has 330 places, 415 transitions, 4573 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:52:35,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 431 transitions, 5503 flow [2024-06-04 14:52:37,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 431 transitions, 5403 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:37,916 INFO L231 Difference]: Finished difference. Result has 332 places, 418 transitions, 4573 flow [2024-06-04 14:52:37,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4473, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=332, PETRI_TRANSITIONS=418} [2024-06-04 14:52:37,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-04 14:52:37,917 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 418 transitions, 4573 flow [2024-06-04 14:52:37,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:37,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:37,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:37,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 14:52:37,918 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:37,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:37,918 INFO L85 PathProgramCache]: Analyzing trace with hash 2076680930, now seen corresponding path program 9 times [2024-06-04 14:52:37,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:37,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483329197] [2024-06-04 14:52:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:37,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:37,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:38,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:38,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483329197] [2024-06-04 14:52:38,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483329197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:38,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:38,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:38,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693951538] [2024-06-04 14:52:38,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:38,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:38,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:38,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:38,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:38,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:38,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 418 transitions, 4573 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:38,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:38,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:38,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:39,877 INFO L124 PetriNetUnfolderBase]: 3671/5564 cut-off events. [2024-06-04 14:52:39,877 INFO L125 PetriNetUnfolderBase]: For 1034015/1034015 co-relation queries the response was YES. [2024-06-04 14:52:39,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51554 conditions, 5564 events. 3671/5564 cut-off events. For 1034015/1034015 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29956 event pairs, 897 based on Foata normal form. 2/5564 useless extension candidates. Maximal degree in co-relation 51403. Up to 5509 conditions per place. [2024-06-04 14:52:39,956 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 399 selfloop transitions, 30 changer transitions 0/432 dead transitions. [2024-06-04 14:52:39,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 432 transitions, 5469 flow [2024-06-04 14:52:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:52:39,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-04 14:52:39,959 INFO L175 Difference]: Start difference. First operand has 332 places, 418 transitions, 4573 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:52:39,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 432 transitions, 5469 flow [2024-06-04 14:52:42,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 432 transitions, 5365 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:42,151 INFO L231 Difference]: Finished difference. Result has 334 places, 418 transitions, 4535 flow [2024-06-04 14:52:42,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4469, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4535, PETRI_PLACES=334, PETRI_TRANSITIONS=418} [2024-06-04 14:52:42,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-04 14:52:42,152 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 418 transitions, 4535 flow [2024-06-04 14:52:42,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:42,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:42,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:42,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 14:52:42,152 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:42,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:42,152 INFO L85 PathProgramCache]: Analyzing trace with hash 570734168, now seen corresponding path program 7 times [2024-06-04 14:52:42,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:42,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866832137] [2024-06-04 14:52:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:42,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:42,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:42,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866832137] [2024-06-04 14:52:42,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866832137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:42,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:42,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:42,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698877861] [2024-06-04 14:52:42,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:42,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:42,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:42,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:42,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:42,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:42,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 418 transitions, 4535 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:42,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:42,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:42,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:44,138 INFO L124 PetriNetUnfolderBase]: 3686/5586 cut-off events. [2024-06-04 14:52:44,138 INFO L125 PetriNetUnfolderBase]: For 1059449/1059451 co-relation queries the response was YES. [2024-06-04 14:52:44,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51877 conditions, 5586 events. 3686/5586 cut-off events. For 1059449/1059451 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 30136 event pairs, 900 based on Foata normal form. 5/5589 useless extension candidates. Maximal degree in co-relation 51725. Up to 5533 conditions per place. [2024-06-04 14:52:44,218 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 400 selfloop transitions, 31 changer transitions 0/434 dead transitions. [2024-06-04 14:52:44,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 434 transitions, 5496 flow [2024-06-04 14:52:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:52:44,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-04 14:52:44,219 INFO L175 Difference]: Start difference. First operand has 334 places, 418 transitions, 4535 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:52:44,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 434 transitions, 5496 flow [2024-06-04 14:52:45,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 434 transitions, 5404 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 14:52:45,934 INFO L231 Difference]: Finished difference. Result has 334 places, 422 transitions, 4582 flow [2024-06-04 14:52:45,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4443, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4582, PETRI_PLACES=334, PETRI_TRANSITIONS=422} [2024-06-04 14:52:45,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-04 14:52:45,935 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 422 transitions, 4582 flow [2024-06-04 14:52:45,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:45,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:45,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:45,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 14:52:45,935 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:45,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:45,935 INFO L85 PathProgramCache]: Analyzing trace with hash -344791262, now seen corresponding path program 10 times [2024-06-04 14:52:45,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:45,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073286568] [2024-06-04 14:52:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:45,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:46,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:46,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073286568] [2024-06-04 14:52:46,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073286568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:46,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:46,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:46,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189821428] [2024-06-04 14:52:46,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:46,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:46,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:46,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:46,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:46,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:46,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 422 transitions, 4582 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:46,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:46,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:46,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:47,925 INFO L124 PetriNetUnfolderBase]: 3696/5600 cut-off events. [2024-06-04 14:52:47,925 INFO L125 PetriNetUnfolderBase]: For 1075292/1075294 co-relation queries the response was YES. [2024-06-04 14:52:47,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52214 conditions, 5600 events. 3696/5600 cut-off events. For 1075292/1075294 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 30211 event pairs, 904 based on Foata normal form. 2/5600 useless extension candidates. Maximal degree in co-relation 52062. Up to 5532 conditions per place. [2024-06-04 14:52:48,004 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 400 selfloop transitions, 35 changer transitions 0/438 dead transitions. [2024-06-04 14:52:48,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 438 transitions, 5769 flow [2024-06-04 14:52:48,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 14:52:48,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:52:48,005 INFO L175 Difference]: Start difference. First operand has 334 places, 422 transitions, 4582 flow. Second operand 8 states and 128 transitions. [2024-06-04 14:52:48,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 438 transitions, 5769 flow [2024-06-04 14:52:50,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 438 transitions, 5685 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 14:52:50,583 INFO L231 Difference]: Finished difference. Result has 338 places, 425 transitions, 4651 flow [2024-06-04 14:52:50,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4498, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4651, PETRI_PLACES=338, PETRI_TRANSITIONS=425} [2024-06-04 14:52:50,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-04 14:52:50,584 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 425 transitions, 4651 flow [2024-06-04 14:52:50,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:50,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:50,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:50,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 14:52:50,584 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:50,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash -118873642, now seen corresponding path program 8 times [2024-06-04 14:52:50,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:50,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648400116] [2024-06-04 14:52:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:50,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:51,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:51,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648400116] [2024-06-04 14:52:51,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648400116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:51,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:51,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:51,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985484478] [2024-06-04 14:52:51,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:51,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:51,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:51,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:51,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:51,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 425 transitions, 4651 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:51,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:51,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:51,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:52,780 INFO L124 PetriNetUnfolderBase]: 3735/5654 cut-off events. [2024-06-04 14:52:52,780 INFO L125 PetriNetUnfolderBase]: For 1117335/1117337 co-relation queries the response was YES. [2024-06-04 14:52:52,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53061 conditions, 5654 events. 3735/5654 cut-off events. For 1117335/1117337 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30534 event pairs, 894 based on Foata normal form. 5/5657 useless extension candidates. Maximal degree in co-relation 52908. Up to 5556 conditions per place. [2024-06-04 14:52:52,864 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 42 changer transitions 0/447 dead transitions. [2024-06-04 14:52:52,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 447 transitions, 5912 flow [2024-06-04 14:52:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:52,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 14:52:52,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:52:52,865 INFO L175 Difference]: Start difference. First operand has 338 places, 425 transitions, 4651 flow. Second operand 8 states and 128 transitions. [2024-06-04 14:52:52,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 447 transitions, 5912 flow [2024-06-04 14:52:54,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 447 transitions, 5695 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-04 14:52:54,747 INFO L231 Difference]: Finished difference. Result has 339 places, 432 transitions, 4677 flow [2024-06-04 14:52:54,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4434, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4677, PETRI_PLACES=339, PETRI_TRANSITIONS=432} [2024-06-04 14:52:54,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-04 14:52:54,747 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 432 transitions, 4677 flow [2024-06-04 14:52:54,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:54,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:54,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:54,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 14:52:54,748 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:54,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:54,748 INFO L85 PathProgramCache]: Analyzing trace with hash -510697682, now seen corresponding path program 10 times [2024-06-04 14:52:54,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:54,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544381698] [2024-06-04 14:52:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:54,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:55,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:55,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544381698] [2024-06-04 14:52:55,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544381698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:55,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:55,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:55,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329247503] [2024-06-04 14:52:55,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:55,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:55,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:55,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:52:55,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 432 transitions, 4677 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:55,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:55,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:52:55,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:56,814 INFO L124 PetriNetUnfolderBase]: 3732/5650 cut-off events. [2024-06-04 14:52:56,815 INFO L125 PetriNetUnfolderBase]: For 1121614/1121616 co-relation queries the response was YES. [2024-06-04 14:52:56,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53036 conditions, 5650 events. 3732/5650 cut-off events. For 1121614/1121616 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30516 event pairs, 902 based on Foata normal form. 3/5651 useless extension candidates. Maximal degree in co-relation 52883. Up to 5612 conditions per place. [2024-06-04 14:52:56,897 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 416 selfloop transitions, 23 changer transitions 0/442 dead transitions. [2024-06-04 14:52:56,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 442 transitions, 5579 flow [2024-06-04 14:52:56,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-04 14:52:56,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-04 14:52:56,898 INFO L175 Difference]: Start difference. First operand has 339 places, 432 transitions, 4677 flow. Second operand 8 states and 121 transitions. [2024-06-04 14:52:56,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 442 transitions, 5579 flow [2024-06-04 14:52:59,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 442 transitions, 5451 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 14:52:59,667 INFO L231 Difference]: Finished difference. Result has 342 places, 432 transitions, 4601 flow [2024-06-04 14:52:59,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4601, PETRI_PLACES=342, PETRI_TRANSITIONS=432} [2024-06-04 14:52:59,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-04 14:52:59,668 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 432 transitions, 4601 flow [2024-06-04 14:52:59,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:59,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:59,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:59,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 14:52:59,668 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:59,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:59,668 INFO L85 PathProgramCache]: Analyzing trace with hash -346746148, now seen corresponding path program 11 times [2024-06-04 14:52:59,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:59,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558637059] [2024-06-04 14:52:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:59,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:00,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:00,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558637059] [2024-06-04 14:53:00,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558637059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:00,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:00,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:00,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460429288] [2024-06-04 14:53:00,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:00,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:00,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:00,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:00,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:00,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:00,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 432 transitions, 4601 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:00,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:00,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:00,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:01,691 INFO L124 PetriNetUnfolderBase]: 3726/5642 cut-off events. [2024-06-04 14:53:01,691 INFO L125 PetriNetUnfolderBase]: For 1135924/1135926 co-relation queries the response was YES. [2024-06-04 14:53:01,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52748 conditions, 5642 events. 3726/5642 cut-off events. For 1135924/1135926 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30429 event pairs, 905 based on Foata normal form. 2/5642 useless extension candidates. Maximal degree in co-relation 52594. Up to 5586 conditions per place. [2024-06-04 14:53:01,775 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 410 selfloop transitions, 30 changer transitions 0/443 dead transitions. [2024-06-04 14:53:01,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 443 transitions, 5511 flow [2024-06-04 14:53:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:53:01,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-04 14:53:01,776 INFO L175 Difference]: Start difference. First operand has 342 places, 432 transitions, 4601 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:53:01,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 443 transitions, 5511 flow [2024-06-04 14:53:04,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 443 transitions, 5417 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:04,588 INFO L231 Difference]: Finished difference. Result has 344 places, 432 transitions, 4573 flow [2024-06-04 14:53:04,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=344, PETRI_TRANSITIONS=432} [2024-06-04 14:53:04,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-04 14:53:04,588 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 432 transitions, 4573 flow [2024-06-04 14:53:04,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:04,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:04,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:04,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 14:53:04,589 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:04,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:04,589 INFO L85 PathProgramCache]: Analyzing trace with hash -346567402, now seen corresponding path program 9 times [2024-06-04 14:53:04,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:04,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099965367] [2024-06-04 14:53:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:04,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:05,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:05,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099965367] [2024-06-04 14:53:05,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099965367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:05,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:05,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:05,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970906706] [2024-06-04 14:53:05,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:05,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:05,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:05,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:05,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:05,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 432 transitions, 4573 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:05,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:05,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:05,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:06,573 INFO L124 PetriNetUnfolderBase]: 3717/5630 cut-off events. [2024-06-04 14:53:06,574 INFO L125 PetriNetUnfolderBase]: For 1145413/1145415 co-relation queries the response was YES. [2024-06-04 14:53:06,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52514 conditions, 5630 events. 3717/5630 cut-off events. For 1145413/1145415 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30390 event pairs, 899 based on Foata normal form. 5/5633 useless extension candidates. Maximal degree in co-relation 52359. Up to 5577 conditions per place. [2024-06-04 14:53:06,654 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 30 changer transitions 0/444 dead transitions. [2024-06-04 14:53:06,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 444 transitions, 5489 flow [2024-06-04 14:53:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:06,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:06,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-04 14:53:06,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-04 14:53:06,655 INFO L175 Difference]: Start difference. First operand has 344 places, 432 transitions, 4573 flow. Second operand 8 states and 125 transitions. [2024-06-04 14:53:06,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 444 transitions, 5489 flow [2024-06-04 14:53:09,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 444 transitions, 5393 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:09,999 INFO L231 Difference]: Finished difference. Result has 345 places, 432 transitions, 4543 flow [2024-06-04 14:53:10,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4543, PETRI_PLACES=345, PETRI_TRANSITIONS=432} [2024-06-04 14:53:10,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-04 14:53:10,000 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 432 transitions, 4543 flow [2024-06-04 14:53:10,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:10,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:10,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:10,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 14:53:10,000 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:10,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:10,001 INFO L85 PathProgramCache]: Analyzing trace with hash -524114818, now seen corresponding path program 12 times [2024-06-04 14:53:10,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:10,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251097778] [2024-06-04 14:53:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:10,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:10,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:10,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251097778] [2024-06-04 14:53:10,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251097778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:10,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:10,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:10,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903909311] [2024-06-04 14:53:10,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:10,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:10,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:10,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:10,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:10,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:10,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 432 transitions, 4543 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:10,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:10,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:10,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:12,026 INFO L124 PetriNetUnfolderBase]: 3711/5622 cut-off events. [2024-06-04 14:53:12,026 INFO L125 PetriNetUnfolderBase]: For 1149049/1149051 co-relation queries the response was YES. [2024-06-04 14:53:12,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52384 conditions, 5622 events. 3711/5622 cut-off events. For 1149049/1149051 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30361 event pairs, 902 based on Foata normal form. 2/5622 useless extension candidates. Maximal degree in co-relation 52228. Up to 5524 conditions per place. [2024-06-04 14:53:12,111 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 53 changer transitions 0/444 dead transitions. [2024-06-04 14:53:12,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 444 transitions, 5461 flow [2024-06-04 14:53:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:53:12,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-04 14:53:12,112 INFO L175 Difference]: Start difference. First operand has 345 places, 432 transitions, 4543 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:53:12,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 444 transitions, 5461 flow [2024-06-04 14:53:14,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 444 transitions, 5333 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:14,848 INFO L231 Difference]: Finished difference. Result has 346 places, 432 transitions, 4527 flow [2024-06-04 14:53:14,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4415, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4527, PETRI_PLACES=346, PETRI_TRANSITIONS=432} [2024-06-04 14:53:14,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-04 14:53:14,849 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 432 transitions, 4527 flow [2024-06-04 14:53:14,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:14,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:14,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:14,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 14:53:14,849 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:14,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:14,849 INFO L85 PathProgramCache]: Analyzing trace with hash -510697310, now seen corresponding path program 10 times [2024-06-04 14:53:14,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:14,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524221987] [2024-06-04 14:53:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:14,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:15,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:15,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524221987] [2024-06-04 14:53:15,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524221987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:15,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:15,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:15,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373549027] [2024-06-04 14:53:15,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:15,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:15,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:15,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:15,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:15,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:15,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 432 transitions, 4527 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:15,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:15,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:15,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:16,901 INFO L124 PetriNetUnfolderBase]: 3702/5610 cut-off events. [2024-06-04 14:53:16,901 INFO L125 PetriNetUnfolderBase]: For 1157744/1157746 co-relation queries the response was YES. [2024-06-04 14:53:16,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52138 conditions, 5610 events. 3702/5610 cut-off events. For 1157744/1157746 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30313 event pairs, 900 based on Foata normal form. 5/5613 useless extension candidates. Maximal degree in co-relation 51981. Up to 5536 conditions per place. [2024-06-04 14:53:16,971 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 405 selfloop transitions, 38 changer transitions 0/446 dead transitions. [2024-06-04 14:53:16,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 446 transitions, 5457 flow [2024-06-04 14:53:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 14:53:16,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:53:16,972 INFO L175 Difference]: Start difference. First operand has 346 places, 432 transitions, 4527 flow. Second operand 8 states and 128 transitions. [2024-06-04 14:53:16,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 446 transitions, 5457 flow [2024-06-04 14:53:19,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 446 transitions, 5256 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 14:53:19,635 INFO L231 Difference]: Finished difference. Result has 346 places, 432 transitions, 4408 flow [2024-06-04 14:53:19,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4326, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4408, PETRI_PLACES=346, PETRI_TRANSITIONS=432} [2024-06-04 14:53:19,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-04 14:53:19,635 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 432 transitions, 4408 flow [2024-06-04 14:53:19,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:19,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:19,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:19,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 14:53:19,636 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:19,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:19,636 INFO L85 PathProgramCache]: Analyzing trace with hash -524115004, now seen corresponding path program 11 times [2024-06-04 14:53:19,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:19,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279882885] [2024-06-04 14:53:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:19,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:20,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:20,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279882885] [2024-06-04 14:53:20,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279882885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:20,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:20,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:20,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88099334] [2024-06-04 14:53:20,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:20,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:20,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:20,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:20,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:20,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:20,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 432 transitions, 4408 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:20,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:20,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:20,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:21,627 INFO L124 PetriNetUnfolderBase]: 3699/5606 cut-off events. [2024-06-04 14:53:21,627 INFO L125 PetriNetUnfolderBase]: For 1160138/1160140 co-relation queries the response was YES. [2024-06-04 14:53:21,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52083 conditions, 5606 events. 3699/5606 cut-off events. For 1160138/1160140 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30265 event pairs, 901 based on Foata normal form. 3/5607 useless extension candidates. Maximal degree in co-relation 51925. Up to 5546 conditions per place. [2024-06-04 14:53:21,702 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 400 selfloop transitions, 40 changer transitions 0/443 dead transitions. [2024-06-04 14:53:21,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 443 transitions, 5530 flow [2024-06-04 14:53:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-04 14:53:21,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-04 14:53:21,703 INFO L175 Difference]: Start difference. First operand has 346 places, 432 transitions, 4408 flow. Second operand 8 states and 125 transitions. [2024-06-04 14:53:21,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 443 transitions, 5530 flow [2024-06-04 14:53:24,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 443 transitions, 5378 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:24,521 INFO L231 Difference]: Finished difference. Result has 347 places, 432 transitions, 4342 flow [2024-06-04 14:53:24,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4256, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4342, PETRI_PLACES=347, PETRI_TRANSITIONS=432} [2024-06-04 14:53:24,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-04 14:53:24,521 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 432 transitions, 4342 flow [2024-06-04 14:53:24,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:24,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:24,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:24,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 14:53:24,522 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:24,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:24,522 INFO L85 PathProgramCache]: Analyzing trace with hash -524114632, now seen corresponding path program 11 times [2024-06-04 14:53:24,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:24,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931544791] [2024-06-04 14:53:24,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:24,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:25,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:25,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931544791] [2024-06-04 14:53:25,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931544791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:25,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:25,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:25,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541073201] [2024-06-04 14:53:25,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:25,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:25,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:25,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:25,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:25,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:25,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 432 transitions, 4342 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:25,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:25,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:25,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:26,512 INFO L124 PetriNetUnfolderBase]: 3714/5627 cut-off events. [2024-06-04 14:53:26,512 INFO L125 PetriNetUnfolderBase]: For 1192141/1192143 co-relation queries the response was YES. [2024-06-04 14:53:26,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52291 conditions, 5627 events. 3714/5627 cut-off events. For 1192141/1192143 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30385 event pairs, 891 based on Foata normal form. 5/5630 useless extension candidates. Maximal degree in co-relation 52132. Up to 5468 conditions per place. [2024-06-04 14:53:26,589 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 386 selfloop transitions, 63 changer transitions 0/452 dead transitions. [2024-06-04 14:53:26,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 452 transitions, 5566 flow [2024-06-04 14:53:26,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 14:53:26,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-04 14:53:26,590 INFO L175 Difference]: Start difference. First operand has 347 places, 432 transitions, 4342 flow. Second operand 8 states and 132 transitions. [2024-06-04 14:53:26,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 452 transitions, 5566 flow [2024-06-04 14:53:29,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 452 transitions, 5399 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 14:53:29,460 INFO L231 Difference]: Finished difference. Result has 347 places, 435 transitions, 4359 flow [2024-06-04 14:53:29,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4359, PETRI_PLACES=347, PETRI_TRANSITIONS=435} [2024-06-04 14:53:29,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-04 14:53:29,460 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 435 transitions, 4359 flow [2024-06-04 14:53:29,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:29,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:29,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:29,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 14:53:29,460 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:29,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:29,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1227361606, now seen corresponding path program 12 times [2024-06-04 14:53:29,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:29,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254453010] [2024-06-04 14:53:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:29,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:30,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:30,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254453010] [2024-06-04 14:53:30,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254453010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:30,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:30,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:30,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496424073] [2024-06-04 14:53:30,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:30,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:30,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:30,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:30,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:30,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 435 transitions, 4359 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:30,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:30,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:30,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:31,589 INFO L124 PetriNetUnfolderBase]: 3711/5622 cut-off events. [2024-06-04 14:53:31,590 INFO L125 PetriNetUnfolderBase]: For 1195231/1195231 co-relation queries the response was YES. [2024-06-04 14:53:31,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52418 conditions, 5622 events. 3711/5622 cut-off events. For 1195231/1195231 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30361 event pairs, 906 based on Foata normal form. 1/5621 useless extension candidates. Maximal degree in co-relation 52259. Up to 5597 conditions per place. [2024-06-04 14:53:31,672 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 424 selfloop transitions, 18 changer transitions 0/445 dead transitions. [2024-06-04 14:53:31,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 445 transitions, 5267 flow [2024-06-04 14:53:31,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-04 14:53:31,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-04 14:53:31,673 INFO L175 Difference]: Start difference. First operand has 347 places, 435 transitions, 4359 flow. Second operand 8 states and 119 transitions. [2024-06-04 14:53:31,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 445 transitions, 5267 flow [2024-06-04 14:53:33,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 445 transitions, 5005 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:33,878 INFO L231 Difference]: Finished difference. Result has 348 places, 435 transitions, 4139 flow [2024-06-04 14:53:33,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4097, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4139, PETRI_PLACES=348, PETRI_TRANSITIONS=435} [2024-06-04 14:53:33,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-04 14:53:33,878 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 435 transitions, 4139 flow [2024-06-04 14:53:33,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:33,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:33,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:33,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 14:53:33,879 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:33,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:33,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1227234754, now seen corresponding path program 12 times [2024-06-04 14:53:33,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:33,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945849567] [2024-06-04 14:53:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:33,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:34,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:34,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945849567] [2024-06-04 14:53:34,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945849567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:34,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:34,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:34,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670097077] [2024-06-04 14:53:34,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:34,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:34,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:34,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:34,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:34,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:34,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 435 transitions, 4139 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:34,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:34,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:34,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:35,983 INFO L124 PetriNetUnfolderBase]: 3702/5611 cut-off events. [2024-06-04 14:53:35,984 INFO L125 PetriNetUnfolderBase]: For 1208051/1208053 co-relation queries the response was YES. [2024-06-04 14:53:36,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51863 conditions, 5611 events. 3702/5611 cut-off events. For 1208051/1208053 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30338 event pairs, 905 based on Foata normal form. 5/5614 useless extension candidates. Maximal degree in co-relation 51703. Up to 5457 conditions per place. [2024-06-04 14:53:36,081 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 384 selfloop transitions, 64 changer transitions 0/451 dead transitions. [2024-06-04 14:53:36,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 451 transitions, 5089 flow [2024-06-04 14:53:36,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 14:53:36,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-04 14:53:36,082 INFO L175 Difference]: Start difference. First operand has 348 places, 435 transitions, 4139 flow. Second operand 8 states and 131 transitions. [2024-06-04 14:53:36,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 451 transitions, 5089 flow [2024-06-04 14:53:37,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 451 transitions, 5031 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:37,871 INFO L231 Difference]: Finished difference. Result has 349 places, 435 transitions, 4215 flow [2024-06-04 14:53:37,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4215, PETRI_PLACES=349, PETRI_TRANSITIONS=435} [2024-06-04 14:53:37,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-04 14:53:37,872 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 435 transitions, 4215 flow [2024-06-04 14:53:37,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:37,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:37,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:37,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 14:53:37,872 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:37,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:37,873 INFO L85 PathProgramCache]: Analyzing trace with hash -124384140, now seen corresponding path program 5 times [2024-06-04 14:53:37,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:37,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638414696] [2024-06-04 14:53:37,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:37,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:38,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:38,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638414696] [2024-06-04 14:53:38,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638414696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:38,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:38,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:38,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778034076] [2024-06-04 14:53:38,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:38,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:38,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:38,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:38,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:38,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 435 transitions, 4215 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:38,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:38,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:38,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:40,087 INFO L124 PetriNetUnfolderBase]: 3707/5617 cut-off events. [2024-06-04 14:53:40,087 INFO L125 PetriNetUnfolderBase]: For 1216943/1216943 co-relation queries the response was YES. [2024-06-04 14:53:40,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52267 conditions, 5617 events. 3707/5617 cut-off events. For 1216943/1216943 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30361 event pairs, 903 based on Foata normal form. 1/5616 useless extension candidates. Maximal degree in co-relation 52106. Up to 5589 conditions per place. [2024-06-04 14:53:40,171 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 431 selfloop transitions, 21 changer transitions 0/455 dead transitions. [2024-06-04 14:53:40,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 455 transitions, 5264 flow [2024-06-04 14:53:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:40,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-04 14:53:40,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34656084656084657 [2024-06-04 14:53:40,172 INFO L175 Difference]: Start difference. First operand has 349 places, 435 transitions, 4215 flow. Second operand 9 states and 131 transitions. [2024-06-04 14:53:40,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 455 transitions, 5264 flow [2024-06-04 14:53:42,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 455 transitions, 5105 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:42,426 INFO L231 Difference]: Finished difference. Result has 353 places, 444 transitions, 4247 flow [2024-06-04 14:53:42,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4247, PETRI_PLACES=353, PETRI_TRANSITIONS=444} [2024-06-04 14:53:42,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-04 14:53:42,426 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 444 transitions, 4247 flow [2024-06-04 14:53:42,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:42,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:42,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:42,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 14:53:42,427 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:42,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:42,427 INFO L85 PathProgramCache]: Analyzing trace with hash -524237950, now seen corresponding path program 4 times [2024-06-04 14:53:42,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:42,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402860575] [2024-06-04 14:53:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:42,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:43,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:43,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402860575] [2024-06-04 14:53:43,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402860575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:43,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:43,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:43,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171973351] [2024-06-04 14:53:43,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:43,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:43,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:43,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:43,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:43,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:43,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 444 transitions, 4247 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:43,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:43,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:43,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:44,826 INFO L124 PetriNetUnfolderBase]: 3702/5610 cut-off events. [2024-06-04 14:53:44,826 INFO L125 PetriNetUnfolderBase]: For 1231842/1231842 co-relation queries the response was YES. [2024-06-04 14:53:44,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52112 conditions, 5610 events. 3702/5610 cut-off events. For 1231842/1231842 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30331 event pairs, 902 based on Foata normal form. 2/5610 useless extension candidates. Maximal degree in co-relation 51949. Up to 5579 conditions per place. [2024-06-04 14:53:44,908 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 433 selfloop transitions, 20 changer transitions 0/456 dead transitions. [2024-06-04 14:53:44,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 456 transitions, 5181 flow [2024-06-04 14:53:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-04 14:53:44,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34656084656084657 [2024-06-04 14:53:44,909 INFO L175 Difference]: Start difference. First operand has 353 places, 444 transitions, 4247 flow. Second operand 9 states and 131 transitions. [2024-06-04 14:53:44,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 456 transitions, 5181 flow [2024-06-04 14:53:47,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 456 transitions, 5086 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:47,280 INFO L231 Difference]: Finished difference. Result has 358 places, 444 transitions, 4197 flow [2024-06-04 14:53:47,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4197, PETRI_PLACES=358, PETRI_TRANSITIONS=444} [2024-06-04 14:53:47,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-04 14:53:47,280 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 444 transitions, 4197 flow [2024-06-04 14:53:47,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:47,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:47,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:47,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 14:53:47,281 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:47,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:47,281 INFO L85 PathProgramCache]: Analyzing trace with hash 323888318, now seen corresponding path program 6 times [2024-06-04 14:53:47,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:47,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251862043] [2024-06-04 14:53:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:47,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:48,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:48,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251862043] [2024-06-04 14:53:48,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251862043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:48,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:48,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:48,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128767319] [2024-06-04 14:53:48,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:48,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:48,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:48,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:48,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:48,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:48,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 444 transitions, 4197 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:48,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:48,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:48,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:49,907 INFO L124 PetriNetUnfolderBase]: 3758/5688 cut-off events. [2024-06-04 14:53:49,907 INFO L125 PetriNetUnfolderBase]: For 1273220/1273220 co-relation queries the response was YES. [2024-06-04 14:53:49,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53054 conditions, 5688 events. 3758/5688 cut-off events. For 1273220/1273220 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30717 event pairs, 889 based on Foata normal form. 3/5689 useless extension candidates. Maximal degree in co-relation 52889. Up to 5544 conditions per place. [2024-06-04 14:53:49,989 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 421 selfloop transitions, 60 changer transitions 0/484 dead transitions. [2024-06-04 14:53:49,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 484 transitions, 5685 flow [2024-06-04 14:53:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:53:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:53:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-04 14:53:49,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-04 14:53:49,990 INFO L175 Difference]: Start difference. First operand has 358 places, 444 transitions, 4197 flow. Second operand 10 states and 159 transitions. [2024-06-04 14:53:49,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 484 transitions, 5685 flow [2024-06-04 14:53:52,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 484 transitions, 5626 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-04 14:53:52,558 INFO L231 Difference]: Finished difference. Result has 364 places, 463 transitions, 4575 flow [2024-06-04 14:53:52,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4138, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4575, PETRI_PLACES=364, PETRI_TRANSITIONS=463} [2024-06-04 14:53:52,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-04 14:53:52,559 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 463 transitions, 4575 flow [2024-06-04 14:53:52,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:52,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:52,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:52,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 14:53:52,559 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:52,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:52,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1227008082, now seen corresponding path program 7 times [2024-06-04 14:53:52,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:52,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586812184] [2024-06-04 14:53:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:52,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:53,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:53,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586812184] [2024-06-04 14:53:53,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586812184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:53,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:53,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:53,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531105201] [2024-06-04 14:53:53,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:53,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:53,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:53,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:53,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:53,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:53,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 463 transitions, 4575 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:53,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:53,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:53,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:55,021 INFO L124 PetriNetUnfolderBase]: 3755/5684 cut-off events. [2024-06-04 14:53:55,022 INFO L125 PetriNetUnfolderBase]: For 1278931/1278931 co-relation queries the response was YES. [2024-06-04 14:53:55,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54026 conditions, 5684 events. 3755/5684 cut-off events. For 1278931/1278931 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30717 event pairs, 903 based on Foata normal form. 1/5683 useless extension candidates. Maximal degree in co-relation 53856. Up to 5641 conditions per place. [2024-06-04 14:53:55,099 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 449 selfloop transitions, 32 changer transitions 0/484 dead transitions. [2024-06-04 14:53:55,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 484 transitions, 5714 flow [2024-06-04 14:53:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:55,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-04 14:53:55,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-04 14:53:55,100 INFO L175 Difference]: Start difference. First operand has 364 places, 463 transitions, 4575 flow. Second operand 9 states and 135 transitions. [2024-06-04 14:53:55,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 484 transitions, 5714 flow [2024-06-04 14:53:57,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 484 transitions, 5609 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-04 14:53:57,926 INFO L231 Difference]: Finished difference. Result has 373 places, 473 transitions, 4720 flow [2024-06-04 14:53:57,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4720, PETRI_PLACES=373, PETRI_TRANSITIONS=473} [2024-06-04 14:53:57,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-04 14:53:57,927 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 473 transitions, 4720 flow [2024-06-04 14:53:57,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:57,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:57,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:57,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 14:53:57,927 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:57,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:57,927 INFO L85 PathProgramCache]: Analyzing trace with hash -628332448, now seen corresponding path program 1 times [2024-06-04 14:53:57,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:57,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550948738] [2024-06-04 14:53:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:57,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:58,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:58,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550948738] [2024-06-04 14:53:58,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550948738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:58,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:58,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:58,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800440334] [2024-06-04 14:53:58,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:58,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:58,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:58,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:58,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:59,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:59,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 473 transitions, 4720 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:59,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:59,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:59,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:00,546 INFO L124 PetriNetUnfolderBase]: 3776/5715 cut-off events. [2024-06-04 14:54:00,546 INFO L125 PetriNetUnfolderBase]: For 1321019/1321019 co-relation queries the response was YES. [2024-06-04 14:54:00,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54781 conditions, 5715 events. 3776/5715 cut-off events. For 1321019/1321019 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30870 event pairs, 860 based on Foata normal form. 2/5715 useless extension candidates. Maximal degree in co-relation 54607. Up to 5632 conditions per place. [2024-06-04 14:54:00,627 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 472 selfloop transitions, 25 changer transitions 0/500 dead transitions. [2024-06-04 14:54:00,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 500 transitions, 6102 flow [2024-06-04 14:54:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:00,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-04 14:54:00,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:54:00,628 INFO L175 Difference]: Start difference. First operand has 373 places, 473 transitions, 4720 flow. Second operand 9 states and 144 transitions. [2024-06-04 14:54:00,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 500 transitions, 6102 flow [2024-06-04 14:54:04,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 500 transitions, 6007 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:04,034 INFO L231 Difference]: Finished difference. Result has 378 places, 477 transitions, 4784 flow [2024-06-04 14:54:04,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4625, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4784, PETRI_PLACES=378, PETRI_TRANSITIONS=477} [2024-06-04 14:54:04,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-04 14:54:04,035 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 477 transitions, 4784 flow [2024-06-04 14:54:04,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:04,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:04,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:04,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 14:54:04,036 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:04,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:04,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1958602178, now seen corresponding path program 2 times [2024-06-04 14:54:04,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:04,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730007465] [2024-06-04 14:54:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:04,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:05,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730007465] [2024-06-04 14:54:05,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730007465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:05,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:05,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:05,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115189667] [2024-06-04 14:54:05,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:05,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:05,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:05,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:05,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:05,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:05,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 477 transitions, 4784 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:05,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:05,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:05,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:06,619 INFO L124 PetriNetUnfolderBase]: 3771/5708 cut-off events. [2024-06-04 14:54:06,619 INFO L125 PetriNetUnfolderBase]: For 1330016/1330016 co-relation queries the response was YES. [2024-06-04 14:54:06,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54813 conditions, 5708 events. 3771/5708 cut-off events. For 1330016/1330016 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30902 event pairs, 901 based on Foata normal form. 2/5708 useless extension candidates. Maximal degree in co-relation 54637. Up to 5654 conditions per place. [2024-06-04 14:54:06,707 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 470 selfloop transitions, 21 changer transitions 0/494 dead transitions. [2024-06-04 14:54:06,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 494 transitions, 5808 flow [2024-06-04 14:54:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:54:06,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-04 14:54:06,707 INFO L175 Difference]: Start difference. First operand has 378 places, 477 transitions, 4784 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:54:06,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 494 transitions, 5808 flow [2024-06-04 14:54:09,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 494 transitions, 5694 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:09,920 INFO L231 Difference]: Finished difference. Result has 381 places, 477 transitions, 4717 flow [2024-06-04 14:54:09,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4717, PETRI_PLACES=381, PETRI_TRANSITIONS=477} [2024-06-04 14:54:09,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-04 14:54:09,921 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 477 transitions, 4717 flow [2024-06-04 14:54:09,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:09,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:09,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:09,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 14:54:09,921 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:09,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:09,921 INFO L85 PathProgramCache]: Analyzing trace with hash -510184318, now seen corresponding path program 3 times [2024-06-04 14:54:09,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:09,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13860578] [2024-06-04 14:54:09,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:09,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:10,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:10,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13860578] [2024-06-04 14:54:10,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13860578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:10,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:10,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:10,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919626747] [2024-06-04 14:54:10,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:10,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:10,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:10,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:10,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:10,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:10,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 477 transitions, 4717 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:10,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:10,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:10,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:12,543 INFO L124 PetriNetUnfolderBase]: 3779/5720 cut-off events. [2024-06-04 14:54:12,543 INFO L125 PetriNetUnfolderBase]: For 1352411/1352411 co-relation queries the response was YES. [2024-06-04 14:54:12,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55003 conditions, 5720 events. 3779/5720 cut-off events. For 1352411/1352411 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 30964 event pairs, 902 based on Foata normal form. 2/5720 useless extension candidates. Maximal degree in co-relation 54825. Up to 5645 conditions per place. [2024-06-04 14:54:12,635 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 453 selfloop transitions, 37 changer transitions 0/493 dead transitions. [2024-06-04 14:54:12,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 493 transitions, 5785 flow [2024-06-04 14:54:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 14:54:12,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-04 14:54:12,636 INFO L175 Difference]: Start difference. First operand has 381 places, 477 transitions, 4717 flow. Second operand 8 states and 129 transitions. [2024-06-04 14:54:12,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 493 transitions, 5785 flow [2024-06-04 14:54:16,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 493 transitions, 5738 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:16,712 INFO L231 Difference]: Finished difference. Result has 382 places, 479 transitions, 4807 flow [2024-06-04 14:54:16,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4807, PETRI_PLACES=382, PETRI_TRANSITIONS=479} [2024-06-04 14:54:16,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-04 14:54:16,713 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 479 transitions, 4807 flow [2024-06-04 14:54:16,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:16,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:16,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:16,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 14:54:16,714 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:16,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:16,714 INFO L85 PathProgramCache]: Analyzing trace with hash -520968498, now seen corresponding path program 4 times [2024-06-04 14:54:16,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:16,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671854131] [2024-06-04 14:54:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:16,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:17,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:17,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671854131] [2024-06-04 14:54:17,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671854131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:17,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:17,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:17,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677349834] [2024-06-04 14:54:17,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:17,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:17,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:17,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:17,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:17,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:17,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 479 transitions, 4807 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:17,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:17,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:17,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:19,304 INFO L124 PetriNetUnfolderBase]: 3774/5714 cut-off events. [2024-06-04 14:54:19,304 INFO L125 PetriNetUnfolderBase]: For 1359010/1359012 co-relation queries the response was YES. [2024-06-04 14:54:19,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55039 conditions, 5714 events. 3774/5714 cut-off events. For 1359010/1359012 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 30954 event pairs, 912 based on Foata normal form. 2/5714 useless extension candidates. Maximal degree in co-relation 54860. Up to 5638 conditions per place. [2024-06-04 14:54:19,393 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 452 selfloop transitions, 37 changer transitions 0/492 dead transitions. [2024-06-04 14:54:19,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 492 transitions, 5869 flow [2024-06-04 14:54:19,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:19,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:19,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-04 14:54:19,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-04 14:54:19,394 INFO L175 Difference]: Start difference. First operand has 382 places, 479 transitions, 4807 flow. Second operand 8 states and 126 transitions. [2024-06-04 14:54:19,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 492 transitions, 5869 flow [2024-06-04 14:54:23,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 492 transitions, 5748 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:23,568 INFO L231 Difference]: Finished difference. Result has 384 places, 481 transitions, 4827 flow [2024-06-04 14:54:23,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4686, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4827, PETRI_PLACES=384, PETRI_TRANSITIONS=481} [2024-06-04 14:54:23,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-04 14:54:23,568 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 481 transitions, 4827 flow [2024-06-04 14:54:23,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:23,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:23,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:23,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 14:54:23,568 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:23,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:23,569 INFO L85 PathProgramCache]: Analyzing trace with hash -232556223, now seen corresponding path program 1 times [2024-06-04 14:54:23,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:23,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467683145] [2024-06-04 14:54:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:23,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:24,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:24,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467683145] [2024-06-04 14:54:24,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467683145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:24,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:24,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:24,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872058797] [2024-06-04 14:54:24,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:24,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:24,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:24,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:24,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:24,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:24,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 481 transitions, 4827 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:24,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:24,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:24,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:26,121 INFO L124 PetriNetUnfolderBase]: 3787/5731 cut-off events. [2024-06-04 14:54:26,121 INFO L125 PetriNetUnfolderBase]: For 1379495/1379495 co-relation queries the response was YES. [2024-06-04 14:54:26,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55540 conditions, 5731 events. 3787/5731 cut-off events. For 1379495/1379495 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 30997 event pairs, 872 based on Foata normal form. 1/5730 useless extension candidates. Maximal degree in co-relation 55360. Up to 5584 conditions per place. [2024-06-04 14:54:26,212 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 463 selfloop transitions, 63 changer transitions 0/529 dead transitions. [2024-06-04 14:54:26,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 529 transitions, 6373 flow [2024-06-04 14:54:26,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:54:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:54:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-04 14:54:26,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-04 14:54:26,213 INFO L175 Difference]: Start difference. First operand has 384 places, 481 transitions, 4827 flow. Second operand 11 states and 186 transitions. [2024-06-04 14:54:26,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 529 transitions, 6373 flow [2024-06-04 14:54:30,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 529 transitions, 6248 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:30,555 INFO L231 Difference]: Finished difference. Result has 390 places, 491 transitions, 5017 flow [2024-06-04 14:54:30,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4702, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5017, PETRI_PLACES=390, PETRI_TRANSITIONS=491} [2024-06-04 14:54:30,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-04 14:54:30,555 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 491 transitions, 5017 flow [2024-06-04 14:54:30,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:30,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:30,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:30,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 14:54:30,555 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:30,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash -226842303, now seen corresponding path program 2 times [2024-06-04 14:54:30,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:30,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14674017] [2024-06-04 14:54:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:30,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:31,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:31,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14674017] [2024-06-04 14:54:31,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14674017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:31,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:31,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:31,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950024277] [2024-06-04 14:54:31,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:31,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:31,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:31,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:31,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:31,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:31,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 491 transitions, 5017 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:31,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:31,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:31,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:33,146 INFO L124 PetriNetUnfolderBase]: 3792/5738 cut-off events. [2024-06-04 14:54:33,146 INFO L125 PetriNetUnfolderBase]: For 1404499/1404499 co-relation queries the response was YES. [2024-06-04 14:54:33,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56296 conditions, 5738 events. 3792/5738 cut-off events. For 1404499/1404499 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 31086 event pairs, 867 based on Foata normal form. 1/5737 useless extension candidates. Maximal degree in co-relation 56114. Up to 5590 conditions per place. [2024-06-04 14:54:33,235 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 463 selfloop transitions, 65 changer transitions 0/531 dead transitions. [2024-06-04 14:54:33,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 531 transitions, 6484 flow [2024-06-04 14:54:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 14:54:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 14:54:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 208 transitions. [2024-06-04 14:54:33,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:54:33,236 INFO L175 Difference]: Start difference. First operand has 390 places, 491 transitions, 5017 flow. Second operand 13 states and 208 transitions. [2024-06-04 14:54:33,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 531 transitions, 6484 flow [2024-06-04 14:54:35,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 531 transitions, 6287 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:36,003 INFO L231 Difference]: Finished difference. Result has 396 places, 494 transitions, 5028 flow [2024-06-04 14:54:36,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4856, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5028, PETRI_PLACES=396, PETRI_TRANSITIONS=494} [2024-06-04 14:54:36,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-04 14:54:36,003 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 494 transitions, 5028 flow [2024-06-04 14:54:36,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:36,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:36,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:36,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 14:54:36,004 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:36,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:36,004 INFO L85 PathProgramCache]: Analyzing trace with hash 666746064, now seen corresponding path program 1 times [2024-06-04 14:54:36,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:36,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635211276] [2024-06-04 14:54:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:36,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:36,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:36,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635211276] [2024-06-04 14:54:36,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635211276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:36,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:36,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:36,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597039650] [2024-06-04 14:54:36,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:36,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:36,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:36,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:36,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:37,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:37,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 494 transitions, 5028 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:37,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:37,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:37,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:38,514 INFO L124 PetriNetUnfolderBase]: 3802/5752 cut-off events. [2024-06-04 14:54:38,515 INFO L125 PetriNetUnfolderBase]: For 1434867/1434867 co-relation queries the response was YES. [2024-06-04 14:54:38,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56588 conditions, 5752 events. 3802/5752 cut-off events. For 1434867/1434867 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 31181 event pairs, 869 based on Foata normal form. 2/5752 useless extension candidates. Maximal degree in co-relation 56404. Up to 5674 conditions per place. [2024-06-04 14:54:38,612 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 504 selfloop transitions, 21 changer transitions 0/528 dead transitions. [2024-06-04 14:54:38,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 528 transitions, 6260 flow [2024-06-04 14:54:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:38,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 14:54:38,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-04 14:54:38,613 INFO L175 Difference]: Start difference. First operand has 396 places, 494 transitions, 5028 flow. Second operand 9 states and 151 transitions. [2024-06-04 14:54:38,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 528 transitions, 6260 flow [2024-06-04 14:54:42,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 528 transitions, 6134 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-04 14:54:42,344 INFO L231 Difference]: Finished difference. Result has 395 places, 497 transitions, 5048 flow [2024-06-04 14:54:42,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5048, PETRI_PLACES=395, PETRI_TRANSITIONS=497} [2024-06-04 14:54:42,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-04 14:54:42,345 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 497 transitions, 5048 flow [2024-06-04 14:54:42,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:42,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:42,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:42,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 14:54:42,345 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:42,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:42,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1561079566, now seen corresponding path program 2 times [2024-06-04 14:54:42,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:42,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695096090] [2024-06-04 14:54:42,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:42,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:43,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:43,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695096090] [2024-06-04 14:54:43,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695096090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:43,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:43,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:43,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245880030] [2024-06-04 14:54:43,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:43,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:43,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:43,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:43,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:43,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:43,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 497 transitions, 5048 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:43,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:43,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:43,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:44,728 INFO L124 PetriNetUnfolderBase]: 3828/5788 cut-off events. [2024-06-04 14:54:44,729 INFO L125 PetriNetUnfolderBase]: For 1476318/1476318 co-relation queries the response was YES. [2024-06-04 14:54:44,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57711 conditions, 5788 events. 3828/5788 cut-off events. For 1476318/1476318 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 31395 event pairs, 873 based on Foata normal form. 2/5788 useless extension candidates. Maximal degree in co-relation 57526. Up to 5661 conditions per place. [2024-06-04 14:54:44,833 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 480 selfloop transitions, 50 changer transitions 0/533 dead transitions. [2024-06-04 14:54:44,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 533 transitions, 6640 flow [2024-06-04 14:54:44,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 14:54:44,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-04 14:54:44,834 INFO L175 Difference]: Start difference. First operand has 395 places, 497 transitions, 5048 flow. Second operand 9 states and 156 transitions. [2024-06-04 14:54:44,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 533 transitions, 6640 flow [2024-06-04 14:54:48,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 533 transitions, 6506 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:48,369 INFO L231 Difference]: Finished difference. Result has 397 places, 503 transitions, 5222 flow [2024-06-04 14:54:48,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4914, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5222, PETRI_PLACES=397, PETRI_TRANSITIONS=503} [2024-06-04 14:54:48,369 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-04 14:54:48,369 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 503 transitions, 5222 flow [2024-06-04 14:54:48,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:48,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:48,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:48,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 14:54:48,370 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:48,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:48,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1561079380, now seen corresponding path program 1 times [2024-06-04 14:54:48,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:48,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772875583] [2024-06-04 14:54:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:48,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:49,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:49,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772875583] [2024-06-04 14:54:49,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772875583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:49,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:49,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:49,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411028130] [2024-06-04 14:54:49,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:49,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:49,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:49,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:49,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:49,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:49,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 503 transitions, 5222 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:49,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:49,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:49,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:50,814 INFO L124 PetriNetUnfolderBase]: 3867/5842 cut-off events. [2024-06-04 14:54:50,815 INFO L125 PetriNetUnfolderBase]: For 1537046/1537046 co-relation queries the response was YES. [2024-06-04 14:54:50,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59022 conditions, 5842 events. 3867/5842 cut-off events. For 1537046/1537046 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 31689 event pairs, 847 based on Foata normal form. 3/5843 useless extension candidates. Maximal degree in co-relation 58836. Up to 5601 conditions per place. [2024-06-04 14:54:50,918 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 463 selfloop transitions, 79 changer transitions 0/545 dead transitions. [2024-06-04 14:54:50,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 545 transitions, 6827 flow [2024-06-04 14:54:50,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 14:54:50,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-04 14:54:50,919 INFO L175 Difference]: Start difference. First operand has 397 places, 503 transitions, 5222 flow. Second operand 9 states and 163 transitions. [2024-06-04 14:54:50,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 545 transitions, 6827 flow [2024-06-04 14:54:54,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 545 transitions, 6661 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:54,381 INFO L231 Difference]: Finished difference. Result has 401 places, 509 transitions, 5358 flow [2024-06-04 14:54:54,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5056, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5358, PETRI_PLACES=401, PETRI_TRANSITIONS=509} [2024-06-04 14:54:54,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-04 14:54:54,381 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 509 transitions, 5358 flow [2024-06-04 14:54:54,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:54,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:54,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:54,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 14:54:54,382 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:54,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:54,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1383948046, now seen corresponding path program 3 times [2024-06-04 14:54:54,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:54,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830954639] [2024-06-04 14:54:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:54,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:55,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:55,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830954639] [2024-06-04 14:54:55,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830954639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:55,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:55,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:55,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105869158] [2024-06-04 14:54:55,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:55,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:55,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:55,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:55,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:55,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:55,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 509 transitions, 5358 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:55,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:55,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:55,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:57,052 INFO L124 PetriNetUnfolderBase]: 3877/5856 cut-off events. [2024-06-04 14:54:57,052 INFO L125 PetriNetUnfolderBase]: For 1554211/1554211 co-relation queries the response was YES. [2024-06-04 14:54:57,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59682 conditions, 5856 events. 3877/5856 cut-off events. For 1554211/1554211 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 31839 event pairs, 874 based on Foata normal form. 2/5856 useless extension candidates. Maximal degree in co-relation 59494. Up to 5725 conditions per place. [2024-06-04 14:54:57,137 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 487 selfloop transitions, 54 changer transitions 0/544 dead transitions. [2024-06-04 14:54:57,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 544 transitions, 6856 flow [2024-06-04 14:54:57,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:54:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:54:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-04 14:54:57,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-04 14:54:57,138 INFO L175 Difference]: Start difference. First operand has 401 places, 509 transitions, 5358 flow. Second operand 11 states and 180 transitions. [2024-06-04 14:54:57,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 544 transitions, 6856 flow [2024-06-04 14:55:00,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 544 transitions, 6688 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-04 14:55:00,503 INFO L231 Difference]: Finished difference. Result has 407 places, 512 transitions, 5376 flow [2024-06-04 14:55:00,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5190, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5376, PETRI_PLACES=407, PETRI_TRANSITIONS=512} [2024-06-04 14:55:00,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-04 14:55:00,504 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 512 transitions, 5376 flow [2024-06-04 14:55:00,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:00,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:00,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:00,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 14:55:00,504 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:00,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:00,504 INFO L85 PathProgramCache]: Analyzing trace with hash 31773368, now seen corresponding path program 2 times [2024-06-04 14:55:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:00,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815001257] [2024-06-04 14:55:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:00,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:01,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:01,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815001257] [2024-06-04 14:55:01,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815001257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:01,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:01,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:01,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064187822] [2024-06-04 14:55:01,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:01,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:01,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:01,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:01,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:01,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:01,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 512 transitions, 5376 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:01,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:01,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:01,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:03,069 INFO L124 PetriNetUnfolderBase]: 3916/5910 cut-off events. [2024-06-04 14:55:03,069 INFO L125 PetriNetUnfolderBase]: For 1609500/1609500 co-relation queries the response was YES. [2024-06-04 14:55:03,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60509 conditions, 5910 events. 3916/5910 cut-off events. For 1609500/1609500 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32091 event pairs, 852 based on Foata normal form. 3/5911 useless extension candidates. Maximal degree in co-relation 60319. Up to 5650 conditions per place. [2024-06-04 14:55:03,157 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 471 selfloop transitions, 88 changer transitions 0/562 dead transitions. [2024-06-04 14:55:03,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 562 transitions, 7263 flow [2024-06-04 14:55:03,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:55:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:55:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 204 transitions. [2024-06-04 14:55:03,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:55:03,158 INFO L175 Difference]: Start difference. First operand has 407 places, 512 transitions, 5376 flow. Second operand 12 states and 204 transitions. [2024-06-04 14:55:03,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 562 transitions, 7263 flow [2024-06-04 14:55:07,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 562 transitions, 7093 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:07,204 INFO L231 Difference]: Finished difference. Result has 410 places, 518 transitions, 5472 flow [2024-06-04 14:55:07,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5206, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5472, PETRI_PLACES=410, PETRI_TRANSITIONS=518} [2024-06-04 14:55:07,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-04 14:55:07,205 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 518 transitions, 5472 flow [2024-06-04 14:55:07,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:07,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:07,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:07,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 14:55:07,206 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:07,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:07,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1383947860, now seen corresponding path program 3 times [2024-06-04 14:55:07,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:07,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573568655] [2024-06-04 14:55:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:07,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:08,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:08,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573568655] [2024-06-04 14:55:08,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573568655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:08,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:08,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:08,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430777880] [2024-06-04 14:55:08,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:08,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:08,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:08,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:08,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:08,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:08,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 518 transitions, 5472 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:08,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:08,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:08,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:09,787 INFO L124 PetriNetUnfolderBase]: 3907/5898 cut-off events. [2024-06-04 14:55:09,787 INFO L125 PetriNetUnfolderBase]: For 1610498/1610498 co-relation queries the response was YES. [2024-06-04 14:55:09,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60294 conditions, 5898 events. 3907/5898 cut-off events. For 1610498/1610498 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31994 event pairs, 848 based on Foata normal form. 3/5899 useless extension candidates. Maximal degree in co-relation 60103. Up to 5643 conditions per place. [2024-06-04 14:55:09,883 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 473 selfloop transitions, 86 changer transitions 0/562 dead transitions. [2024-06-04 14:55:09,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 562 transitions, 7037 flow [2024-06-04 14:55:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:55:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:55:09,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-04 14:55:09,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-04 14:55:09,884 INFO L175 Difference]: Start difference. First operand has 410 places, 518 transitions, 5472 flow. Second operand 11 states and 196 transitions. [2024-06-04 14:55:09,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 562 transitions, 7037 flow [2024-06-04 14:55:13,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 562 transitions, 6834 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:13,838 INFO L231 Difference]: Finished difference. Result has 413 places, 518 transitions, 5447 flow [2024-06-04 14:55:13,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5447, PETRI_PLACES=413, PETRI_TRANSITIONS=518} [2024-06-04 14:55:13,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-04 14:55:13,838 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 518 transitions, 5447 flow [2024-06-04 14:55:13,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:13,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:13,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:13,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 14:55:13,839 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:13,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:13,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1649737396, now seen corresponding path program 1 times [2024-06-04 14:55:13,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:13,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071135274] [2024-06-04 14:55:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:13,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:14,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:14,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071135274] [2024-06-04 14:55:14,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071135274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:14,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:14,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:14,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266934712] [2024-06-04 14:55:14,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:14,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:14,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:14,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:14,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:15,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:15,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 518 transitions, 5447 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:15,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:15,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:15,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:16,650 INFO L124 PetriNetUnfolderBase]: 3987/6018 cut-off events. [2024-06-04 14:55:16,650 INFO L125 PetriNetUnfolderBase]: For 1726159/1726159 co-relation queries the response was YES. [2024-06-04 14:55:16,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62954 conditions, 6018 events. 3987/6018 cut-off events. For 1726159/1726159 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 32660 event pairs, 732 based on Foata normal form. 2/6018 useless extension candidates. Maximal degree in co-relation 62762. Up to 5549 conditions per place. [2024-06-04 14:55:16,752 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 460 selfloop transitions, 108 changer transitions 0/571 dead transitions. [2024-06-04 14:55:16,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 571 transitions, 7400 flow [2024-06-04 14:55:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:16,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-04 14:55:16,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-04 14:55:16,753 INFO L175 Difference]: Start difference. First operand has 413 places, 518 transitions, 5447 flow. Second operand 10 states and 187 transitions. [2024-06-04 14:55:16,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 571 transitions, 7400 flow [2024-06-04 14:55:21,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 571 transitions, 7193 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-04 14:55:21,377 INFO L231 Difference]: Finished difference. Result has 413 places, 522 transitions, 5581 flow [2024-06-04 14:55:21,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5240, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5581, PETRI_PLACES=413, PETRI_TRANSITIONS=522} [2024-06-04 14:55:21,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-04 14:55:21,377 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 522 transitions, 5581 flow [2024-06-04 14:55:21,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:21,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:21,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:21,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 14:55:21,378 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:21,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:21,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1642328086, now seen corresponding path program 2 times [2024-06-04 14:55:21,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:21,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72041803] [2024-06-04 14:55:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:21,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:22,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:22,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72041803] [2024-06-04 14:55:22,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72041803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:22,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:22,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:22,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154267974] [2024-06-04 14:55:22,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:22,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:22,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:22,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:22,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:22,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:22,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 522 transitions, 5581 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:22,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:22,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:22,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:24,239 INFO L124 PetriNetUnfolderBase]: 4080/6157 cut-off events. [2024-06-04 14:55:24,239 INFO L125 PetriNetUnfolderBase]: For 1871768/1871768 co-relation queries the response was YES. [2024-06-04 14:55:24,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66742 conditions, 6157 events. 4080/6157 cut-off events. For 1871768/1871768 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 33701 event pairs, 887 based on Foata normal form. 2/6157 useless extension candidates. Maximal degree in co-relation 66548. Up to 5799 conditions per place. [2024-06-04 14:55:24,353 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 467 selfloop transitions, 105 changer transitions 0/575 dead transitions. [2024-06-04 14:55:24,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 575 transitions, 7582 flow [2024-06-04 14:55:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:55:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:55:24,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-04 14:55:24,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-04 14:55:24,354 INFO L175 Difference]: Start difference. First operand has 413 places, 522 transitions, 5581 flow. Second operand 11 states and 201 transitions. [2024-06-04 14:55:24,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 575 transitions, 7582 flow [2024-06-04 14:55:29,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 575 transitions, 7394 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:29,698 INFO L231 Difference]: Finished difference. Result has 418 places, 526 transitions, 5708 flow [2024-06-04 14:55:29,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5708, PETRI_PLACES=418, PETRI_TRANSITIONS=526} [2024-06-04 14:55:29,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-04 14:55:29,699 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 526 transitions, 5708 flow [2024-06-04 14:55:29,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:29,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:29,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:29,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 14:55:29,699 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:29,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:29,700 INFO L85 PathProgramCache]: Analyzing trace with hash -226834367, now seen corresponding path program 1 times [2024-06-04 14:55:29,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:29,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595948197] [2024-06-04 14:55:29,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:29,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:30,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:30,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595948197] [2024-06-04 14:55:30,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595948197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:30,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:30,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:30,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812893777] [2024-06-04 14:55:30,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:30,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:30,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:30,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:30,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:31,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:31,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 526 transitions, 5708 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:31,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:31,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:31,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:32,943 INFO L124 PetriNetUnfolderBase]: 4098/6182 cut-off events. [2024-06-04 14:55:32,943 INFO L125 PetriNetUnfolderBase]: For 1909997/1909997 co-relation queries the response was YES. [2024-06-04 14:55:33,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67565 conditions, 6182 events. 4098/6182 cut-off events. For 1909997/1909997 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 33810 event pairs, 886 based on Foata normal form. 2/6182 useless extension candidates. Maximal degree in co-relation 67369. Up to 5902 conditions per place. [2024-06-04 14:55:33,040 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 471 selfloop transitions, 104 changer transitions 0/578 dead transitions. [2024-06-04 14:55:33,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 578 transitions, 7458 flow [2024-06-04 14:55:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 14:55:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 14:55:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 216 transitions. [2024-06-04 14:55:33,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956043956043956 [2024-06-04 14:55:33,041 INFO L175 Difference]: Start difference. First operand has 418 places, 526 transitions, 5708 flow. Second operand 13 states and 216 transitions. [2024-06-04 14:55:33,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 578 transitions, 7458 flow [2024-06-04 14:55:39,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 578 transitions, 7340 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:39,363 INFO L231 Difference]: Finished difference. Result has 426 places, 535 transitions, 6005 flow [2024-06-04 14:55:39,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5593, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6005, PETRI_PLACES=426, PETRI_TRANSITIONS=535} [2024-06-04 14:55:39,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-04 14:55:39,363 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 535 transitions, 6005 flow [2024-06-04 14:55:39,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:39,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:39,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:39,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 14:55:39,364 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:39,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1642318786, now seen corresponding path program 3 times [2024-06-04 14:55:39,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:39,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462603777] [2024-06-04 14:55:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:39,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:40,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:40,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462603777] [2024-06-04 14:55:40,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462603777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:40,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:40,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:40,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799691841] [2024-06-04 14:55:40,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:40,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:40,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:40,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:40,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:40,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:40,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 535 transitions, 6005 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:40,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:40,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:40,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:42,228 INFO L124 PetriNetUnfolderBase]: 4065/6135 cut-off events. [2024-06-04 14:55:42,228 INFO L125 PetriNetUnfolderBase]: For 1923408/1923408 co-relation queries the response was YES. [2024-06-04 14:55:42,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66308 conditions, 6135 events. 4065/6135 cut-off events. For 1923408/1923408 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 33551 event pairs, 877 based on Foata normal form. 14/6147 useless extension candidates. Maximal degree in co-relation 66109. Up to 5822 conditions per place. [2024-06-04 14:55:42,336 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 474 selfloop transitions, 105 changer transitions 0/582 dead transitions. [2024-06-04 14:55:42,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 582 transitions, 7660 flow [2024-06-04 14:55:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:55:42,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:55:42,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 209 transitions. [2024-06-04 14:55:42,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146825396825397 [2024-06-04 14:55:42,337 INFO L175 Difference]: Start difference. First operand has 426 places, 535 transitions, 6005 flow. Second operand 12 states and 209 transitions. [2024-06-04 14:55:42,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 582 transitions, 7660 flow [2024-06-04 14:55:47,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 582 transitions, 7462 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:47,483 INFO L231 Difference]: Finished difference. Result has 430 places, 535 transitions, 6024 flow [2024-06-04 14:55:47,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5807, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6024, PETRI_PLACES=430, PETRI_TRANSITIONS=535} [2024-06-04 14:55:47,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-04 14:55:47,484 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 535 transitions, 6024 flow [2024-06-04 14:55:47,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:47,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:47,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:47,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 14:55:47,484 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:47,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash -412411128, now seen corresponding path program 4 times [2024-06-04 14:55:47,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:47,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760856137] [2024-06-04 14:55:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:47,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:48,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:48,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760856137] [2024-06-04 14:55:48,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760856137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:48,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:48,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:48,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775394523] [2024-06-04 14:55:48,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:48,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:48,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:48,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:48,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:48,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:48,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 535 transitions, 6024 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:48,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:48,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:48,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:50,152 INFO L124 PetriNetUnfolderBase]: 4129/6226 cut-off events. [2024-06-04 14:55:50,152 INFO L125 PetriNetUnfolderBase]: For 1884871/1884873 co-relation queries the response was YES. [2024-06-04 14:55:50,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68038 conditions, 6226 events. 4129/6226 cut-off events. For 1884871/1884873 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34147 event pairs, 817 based on Foata normal form. 2/6226 useless extension candidates. Maximal degree in co-relation 67837. Up to 5909 conditions per place. [2024-06-04 14:55:50,259 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 517 selfloop transitions, 63 changer transitions 0/583 dead transitions. [2024-06-04 14:55:50,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 583 transitions, 8168 flow [2024-06-04 14:55:50,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:55:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:55:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-04 14:55:50,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-04 14:55:50,260 INFO L175 Difference]: Start difference. First operand has 430 places, 535 transitions, 6024 flow. Second operand 11 states and 186 transitions. [2024-06-04 14:55:50,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 583 transitions, 8168 flow [2024-06-04 14:55:54,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 583 transitions, 7953 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-04 14:55:54,887 INFO L231 Difference]: Finished difference. Result has 430 places, 547 transitions, 6291 flow [2024-06-04 14:55:54,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5809, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6291, PETRI_PLACES=430, PETRI_TRANSITIONS=547} [2024-06-04 14:55:54,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-04 14:55:54,887 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 547 transitions, 6291 flow [2024-06-04 14:55:54,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:54,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:54,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:54,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 14:55:54,888 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:54,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:54,888 INFO L85 PathProgramCache]: Analyzing trace with hash -860995574, now seen corresponding path program 5 times [2024-06-04 14:55:54,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:54,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960637493] [2024-06-04 14:55:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:54,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:55,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:55,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960637493] [2024-06-04 14:55:55,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960637493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:55,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:55,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:55,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811230223] [2024-06-04 14:55:55,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:55,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:55,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:55,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:55,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:55,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:55,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 547 transitions, 6291 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:55,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:55,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:55,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:57,700 INFO L124 PetriNetUnfolderBase]: 4123/6218 cut-off events. [2024-06-04 14:55:57,700 INFO L125 PetriNetUnfolderBase]: For 1898946/1898948 co-relation queries the response was YES. [2024-06-04 14:55:57,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68106 conditions, 6218 events. 4123/6218 cut-off events. For 1898946/1898948 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34058 event pairs, 820 based on Foata normal form. 2/6218 useless extension candidates. Maximal degree in co-relation 67904. Up to 5904 conditions per place. [2024-06-04 14:55:57,795 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 510 selfloop transitions, 62 changer transitions 0/575 dead transitions. [2024-06-04 14:55:57,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 575 transitions, 7787 flow [2024-06-04 14:55:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 14:55:57,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-04 14:55:57,796 INFO L175 Difference]: Start difference. First operand has 430 places, 547 transitions, 6291 flow. Second operand 9 states and 156 transitions. [2024-06-04 14:55:57,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 575 transitions, 7787 flow [2024-06-04 14:56:03,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 575 transitions, 7486 flow, removed 122 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:03,277 INFO L231 Difference]: Finished difference. Result has 434 places, 547 transitions, 6120 flow [2024-06-04 14:56:03,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5990, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6120, PETRI_PLACES=434, PETRI_TRANSITIONS=547} [2024-06-04 14:56:03,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-04 14:56:03,278 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 547 transitions, 6120 flow [2024-06-04 14:56:03,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:03,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:03,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:03,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 14:56:03,278 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:56:03,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:03,278 INFO L85 PathProgramCache]: Analyzing trace with hash -866656484, now seen corresponding path program 6 times [2024-06-04 14:56:03,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:03,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99299877] [2024-06-04 14:56:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:03,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:04,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:04,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99299877] [2024-06-04 14:56:04,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99299877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:04,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:04,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:04,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955714050] [2024-06-04 14:56:04,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:04,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:04,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:04,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:04,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:04,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:04,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 547 transitions, 6120 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:04,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:04,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:04,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:05,923 INFO L124 PetriNetUnfolderBase]: 4117/6210 cut-off events. [2024-06-04 14:56:05,923 INFO L125 PetriNetUnfolderBase]: For 1904756/1904758 co-relation queries the response was YES. [2024-06-04 14:56:06,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67764 conditions, 6210 events. 4117/6210 cut-off events. For 1904756/1904758 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34030 event pairs, 815 based on Foata normal form. 2/6210 useless extension candidates. Maximal degree in co-relation 67560. Up to 5931 conditions per place. [2024-06-04 14:56:06,032 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 525 selfloop transitions, 50 changer transitions 0/578 dead transitions. [2024-06-04 14:56:06,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 578 transitions, 7368 flow [2024-06-04 14:56:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 14:56:06,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-04 14:56:06,033 INFO L175 Difference]: Start difference. First operand has 434 places, 547 transitions, 6120 flow. Second operand 9 states and 159 transitions. [2024-06-04 14:56:06,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 578 transitions, 7368 flow [2024-06-04 14:56:10,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 578 transitions, 7208 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-04 14:56:10,479 INFO L231 Difference]: Finished difference. Result has 435 places, 547 transitions, 6066 flow [2024-06-04 14:56:10,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6066, PETRI_PLACES=435, PETRI_TRANSITIONS=547} [2024-06-04 14:56:10,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-04 14:56:10,479 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 547 transitions, 6066 flow [2024-06-04 14:56:10,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:10,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:10,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:10,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 14:56:10,480 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:56:10,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:10,480 INFO L85 PathProgramCache]: Analyzing trace with hash -866805439, now seen corresponding path program 3 times [2024-06-04 14:56:10,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:10,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977397301] [2024-06-04 14:56:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:10,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:11,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:11,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977397301] [2024-06-04 14:56:11,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977397301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:11,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:11,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:11,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777687919] [2024-06-04 14:56:11,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:11,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:11,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:11,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:11,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:11,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 547 transitions, 6066 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:11,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:11,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:11,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:13,187 INFO L124 PetriNetUnfolderBase]: 4130/6228 cut-off events. [2024-06-04 14:56:13,187 INFO L125 PetriNetUnfolderBase]: For 1932714/1932716 co-relation queries the response was YES. [2024-06-04 14:56:13,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68240 conditions, 6228 events. 4130/6228 cut-off events. For 1932714/1932716 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 34142 event pairs, 908 based on Foata normal form. 3/6229 useless extension candidates. Maximal degree in co-relation 68035. Up to 6030 conditions per place. [2024-06-04 14:56:13,295 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 98 changer transitions 0/582 dead transitions. [2024-06-04 14:56:13,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 582 transitions, 7730 flow [2024-06-04 14:56:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:13,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 14:56:13,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-04 14:56:13,296 INFO L175 Difference]: Start difference. First operand has 435 places, 547 transitions, 6066 flow. Second operand 9 states and 156 transitions. [2024-06-04 14:56:13,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 582 transitions, 7730 flow [2024-06-04 14:56:17,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 582 transitions, 7592 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 14:56:17,404 INFO L231 Difference]: Finished difference. Result has 437 places, 555 transitions, 6316 flow [2024-06-04 14:56:17,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6316, PETRI_PLACES=437, PETRI_TRANSITIONS=555} [2024-06-04 14:56:17,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-04 14:56:17,405 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 555 transitions, 6316 flow [2024-06-04 14:56:17,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:17,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:17,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:17,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 14:56:17,405 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:56:17,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:17,405 INFO L85 PathProgramCache]: Analyzing trace with hash 139387752, now seen corresponding path program 1 times [2024-06-04 14:56:17,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:17,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070634229] [2024-06-04 14:56:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:17,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:18,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:18,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070634229] [2024-06-04 14:56:18,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070634229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:18,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:18,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:18,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526436306] [2024-06-04 14:56:18,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:18,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:18,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:18,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:18,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:18,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 555 transitions, 6316 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:18,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:18,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:18,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:20,173 INFO L124 PetriNetUnfolderBase]: 4160/6270 cut-off events. [2024-06-04 14:56:20,173 INFO L125 PetriNetUnfolderBase]: For 2011525/2011527 co-relation queries the response was YES. [2024-06-04 14:56:20,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69320 conditions, 6270 events. 4160/6270 cut-off events. For 2011525/2011527 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 34398 event pairs, 836 based on Foata normal form. 6/6274 useless extension candidates. Maximal degree in co-relation 69113. Up to 6119 conditions per place. [2024-06-04 14:56:20,279 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 551 selfloop transitions, 33 changer transitions 0/587 dead transitions. [2024-06-04 14:56:20,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 587 transitions, 7678 flow [2024-06-04 14:56:20,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 14:56:20,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:56:20,280 INFO L175 Difference]: Start difference. First operand has 437 places, 555 transitions, 6316 flow. Second operand 9 states and 153 transitions. [2024-06-04 14:56:20,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 587 transitions, 7678 flow [2024-06-04 14:56:24,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 587 transitions, 7446 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:24,640 INFO L231 Difference]: Finished difference. Result has 441 places, 558 transitions, 6250 flow [2024-06-04 14:56:24,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6250, PETRI_PLACES=441, PETRI_TRANSITIONS=558} [2024-06-04 14:56:24,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-04 14:56:24,640 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 558 transitions, 6250 flow [2024-06-04 14:56:24,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:24,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:24,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:24,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 14:56:24,641 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:56:24,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:24,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2012946549, now seen corresponding path program 4 times [2024-06-04 14:56:24,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:24,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741407745] [2024-06-04 14:56:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:24,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:25,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:25,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741407745] [2024-06-04 14:56:25,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741407745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:25,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:25,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:25,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853643895] [2024-06-04 14:56:25,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:25,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:25,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:25,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:25,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:25,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:25,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 558 transitions, 6250 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:25,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:25,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:25,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:27,427 INFO L124 PetriNetUnfolderBase]: 4165/6277 cut-off events. [2024-06-04 14:56:27,427 INFO L125 PetriNetUnfolderBase]: For 1992336/1992338 co-relation queries the response was YES. [2024-06-04 14:56:27,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69851 conditions, 6277 events. 4165/6277 cut-off events. For 1992336/1992338 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 34408 event pairs, 912 based on Foata normal form. 3/6278 useless extension candidates. Maximal degree in co-relation 69642. Up to 6098 conditions per place. [2024-06-04 14:56:27,540 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 487 selfloop transitions, 94 changer transitions 0/584 dead transitions. [2024-06-04 14:56:27,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 584 transitions, 7507 flow [2024-06-04 14:56:27,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:27,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:27,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 14:56:27,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-04 14:56:27,541 INFO L175 Difference]: Start difference. First operand has 441 places, 558 transitions, 6250 flow. Second operand 9 states and 151 transitions. [2024-06-04 14:56:27,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 584 transitions, 7507 flow [2024-06-04 14:56:32,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 584 transitions, 7363 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:32,285 INFO L231 Difference]: Finished difference. Result has 443 places, 561 transitions, 6341 flow [2024-06-04 14:56:32,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6106, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6341, PETRI_PLACES=443, PETRI_TRANSITIONS=561} [2024-06-04 14:56:32,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-04 14:56:32,285 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 561 transitions, 6341 flow [2024-06-04 14:56:32,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:32,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:32,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:32,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 14:56:32,286 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:56:32,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:32,286 INFO L85 PathProgramCache]: Analyzing trace with hash -866536328, now seen corresponding path program 4 times [2024-06-04 14:56:32,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:32,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760140357] [2024-06-04 14:56:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:32,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:33,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:33,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760140357] [2024-06-04 14:56:33,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760140357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:33,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:33,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:33,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51674490] [2024-06-04 14:56:33,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:33,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:33,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:33,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:33,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:33,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:33,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 561 transitions, 6341 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:33,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:33,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:33,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:34,838 INFO L124 PetriNetUnfolderBase]: 4220/6353 cut-off events. [2024-06-04 14:56:34,838 INFO L125 PetriNetUnfolderBase]: For 2087760/2087762 co-relation queries the response was YES. [2024-06-04 14:56:34,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71382 conditions, 6353 events. 4220/6353 cut-off events. For 2087760/2087762 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34801 event pairs, 891 based on Foata normal form. 5/6356 useless extension candidates. Maximal degree in co-relation 71172. Up to 5756 conditions per place. [2024-06-04 14:56:34,953 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 439 selfloop transitions, 162 changer transitions 0/604 dead transitions. [2024-06-04 14:56:34,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 604 transitions, 8765 flow [2024-06-04 14:56:34,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:34,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 14:56:34,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-04 14:56:34,954 INFO L175 Difference]: Start difference. First operand has 443 places, 561 transitions, 6341 flow. Second operand 9 states and 166 transitions. [2024-06-04 14:56:34,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 604 transitions, 8765 flow [2024-06-04 14:56:40,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 604 transitions, 8561 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:40,265 INFO L231 Difference]: Finished difference. Result has 445 places, 570 transitions, 6713 flow [2024-06-04 14:56:40,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6137, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6713, PETRI_PLACES=445, PETRI_TRANSITIONS=570} [2024-06-04 14:56:40,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-04 14:56:40,266 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 570 transitions, 6713 flow [2024-06-04 14:56:40,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:40,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:40,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:40,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 14:56:40,267 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:56:40,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:40,267 INFO L85 PathProgramCache]: Analyzing trace with hash 139208820, now seen corresponding path program 7 times [2024-06-04 14:56:40,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:40,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23775900] [2024-06-04 14:56:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:40,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:41,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:41,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23775900] [2024-06-04 14:56:41,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23775900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:41,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:41,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:41,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173715107] [2024-06-04 14:56:41,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:41,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:41,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:41,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:41,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:41,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:41,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 570 transitions, 6713 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:41,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:41,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:41,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:42,972 INFO L124 PetriNetUnfolderBase]: 4254/6400 cut-off events. [2024-06-04 14:56:42,972 INFO L125 PetriNetUnfolderBase]: For 2144338/2144340 co-relation queries the response was YES. [2024-06-04 14:56:43,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73391 conditions, 6400 events. 4254/6400 cut-off events. For 2144338/2144340 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 35078 event pairs, 844 based on Foata normal form. 2/6400 useless extension candidates. Maximal degree in co-relation 73180. Up to 5823 conditions per place. [2024-06-04 14:56:43,077 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 456 selfloop transitions, 151 changer transitions 0/610 dead transitions. [2024-06-04 14:56:43,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 610 transitions, 9211 flow [2024-06-04 14:56:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:43,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:43,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 14:56:43,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-04 14:56:43,078 INFO L175 Difference]: Start difference. First operand has 445 places, 570 transitions, 6713 flow. Second operand 9 states and 164 transitions. [2024-06-04 14:56:43,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 610 transitions, 9211 flow [2024-06-04 14:56:49,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 610 transitions, 8974 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:49,074 INFO L231 Difference]: Finished difference. Result has 450 places, 579 transitions, 7144 flow [2024-06-04 14:56:49,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6482, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7144, PETRI_PLACES=450, PETRI_TRANSITIONS=579} [2024-06-04 14:56:49,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-04 14:56:49,075 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 579 transitions, 7144 flow [2024-06-04 14:56:49,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:49,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:49,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:49,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 14:56:49,076 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:56:49,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:49,076 INFO L85 PathProgramCache]: Analyzing trace with hash -857270738, now seen corresponding path program 5 times [2024-06-04 14:56:49,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:49,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093414410] [2024-06-04 14:56:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:49,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:49,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:49,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093414410] [2024-06-04 14:56:49,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093414410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:49,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:49,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:49,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538266738] [2024-06-04 14:56:49,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:49,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:49,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:49,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:49,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:49,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:49,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 579 transitions, 7144 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:49,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:49,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:49,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:51,694 INFO L124 PetriNetUnfolderBase]: 4293/6454 cut-off events. [2024-06-04 14:56:51,695 INFO L125 PetriNetUnfolderBase]: For 2214172/2214174 co-relation queries the response was YES. [2024-06-04 14:56:51,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74468 conditions, 6454 events. 4293/6454 cut-off events. For 2214172/2214174 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 35396 event pairs, 892 based on Foata normal form. 5/6457 useless extension candidates. Maximal degree in co-relation 74255. Up to 5838 conditions per place. [2024-06-04 14:56:51,819 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 449 selfloop transitions, 164 changer transitions 0/616 dead transitions. [2024-06-04 14:56:51,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 616 transitions, 9444 flow [2024-06-04 14:56:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:51,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 14:56:51,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-04 14:56:51,820 INFO L175 Difference]: Start difference. First operand has 450 places, 579 transitions, 7144 flow. Second operand 9 states and 163 transitions. [2024-06-04 14:56:51,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 616 transitions, 9444 flow [2024-06-04 14:56:58,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 616 transitions, 9196 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:58,420 INFO L231 Difference]: Finished difference. Result has 455 places, 585 transitions, 7318 flow [2024-06-04 14:56:58,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6896, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7318, PETRI_PLACES=455, PETRI_TRANSITIONS=585} [2024-06-04 14:56:58,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-04 14:56:58,421 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 585 transitions, 7318 flow [2024-06-04 14:56:58,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:58,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:58,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:58,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 14:56:58,422 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:56:58,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:58,422 INFO L85 PathProgramCache]: Analyzing trace with hash 139525950, now seen corresponding path program 8 times [2024-06-04 14:56:58,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:58,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966003378] [2024-06-04 14:56:58,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:58,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:59,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:59,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966003378] [2024-06-04 14:56:59,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966003378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:59,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:59,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:59,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424718162] [2024-06-04 14:56:59,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:59,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:59,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:59,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:59,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:59,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:59,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 585 transitions, 7318 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:59,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:59,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:59,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:01,387 INFO L124 PetriNetUnfolderBase]: 4319/6490 cut-off events. [2024-06-04 14:57:01,387 INFO L125 PetriNetUnfolderBase]: For 2253606/2253608 co-relation queries the response was YES. [2024-06-04 14:57:01,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75578 conditions, 6490 events. 4319/6490 cut-off events. For 2253606/2253608 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 35633 event pairs, 861 based on Foata normal form. 2/6490 useless extension candidates. Maximal degree in co-relation 75363. Up to 5902 conditions per place. [2024-06-04 14:57:01,489 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 461 selfloop transitions, 155 changer transitions 0/619 dead transitions. [2024-06-04 14:57:01,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 619 transitions, 9644 flow [2024-06-04 14:57:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 14:57:01,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-04 14:57:01,490 INFO L175 Difference]: Start difference. First operand has 455 places, 585 transitions, 7318 flow. Second operand 9 states and 161 transitions. [2024-06-04 14:57:01,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 619 transitions, 9644 flow [2024-06-04 14:57:07,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 619 transitions, 9356 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 14:57:07,178 INFO L231 Difference]: Finished difference. Result has 459 places, 591 transitions, 7506 flow [2024-06-04 14:57:07,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7030, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7506, PETRI_PLACES=459, PETRI_TRANSITIONS=591} [2024-06-04 14:57:07,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-04 14:57:07,179 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 591 transitions, 7506 flow [2024-06-04 14:57:07,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:07,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:07,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:07,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 14:57:07,179 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:07,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:07,179 INFO L85 PathProgramCache]: Analyzing trace with hash -857282239, now seen corresponding path program 5 times [2024-06-04 14:57:07,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:07,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341925214] [2024-06-04 14:57:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:07,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:08,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:08,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341925214] [2024-06-04 14:57:08,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341925214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:08,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:08,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:08,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207672782] [2024-06-04 14:57:08,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:08,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:08,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:08,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:08,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:08,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:08,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 591 transitions, 7506 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:08,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:08,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:08,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:09,893 INFO L124 PetriNetUnfolderBase]: 4324/6497 cut-off events. [2024-06-04 14:57:09,894 INFO L125 PetriNetUnfolderBase]: For 2274184/2274186 co-relation queries the response was YES. [2024-06-04 14:57:09,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75758 conditions, 6497 events. 4324/6497 cut-off events. For 2274184/2274186 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35682 event pairs, 943 based on Foata normal form. 3/6498 useless extension candidates. Maximal degree in co-relation 75542. Up to 6318 conditions per place. [2024-06-04 14:57:10,020 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 518 selfloop transitions, 93 changer transitions 0/614 dead transitions. [2024-06-04 14:57:10,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 614 transitions, 8821 flow [2024-06-04 14:57:10,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 14:57:10,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-04 14:57:10,021 INFO L175 Difference]: Start difference. First operand has 459 places, 591 transitions, 7506 flow. Second operand 9 states and 148 transitions. [2024-06-04 14:57:10,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 614 transitions, 8821 flow [2024-06-04 14:57:16,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 614 transitions, 8501 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-04 14:57:16,336 INFO L231 Difference]: Finished difference. Result has 463 places, 594 transitions, 7425 flow [2024-06-04 14:57:16,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7186, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7425, PETRI_PLACES=463, PETRI_TRANSITIONS=594} [2024-06-04 14:57:16,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-04 14:57:16,337 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 594 transitions, 7425 flow [2024-06-04 14:57:16,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:16,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:16,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:16,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 14:57:16,338 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:16,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:16,338 INFO L85 PathProgramCache]: Analyzing trace with hash -857281898, now seen corresponding path program 6 times [2024-06-04 14:57:16,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:16,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881729997] [2024-06-04 14:57:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:16,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:17,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:17,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881729997] [2024-06-04 14:57:17,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881729997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:17,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:17,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:17,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359323074] [2024-06-04 14:57:17,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:17,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:17,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:17,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:17,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:17,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:17,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 594 transitions, 7425 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:17,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:17,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:17,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:19,206 INFO L124 PetriNetUnfolderBase]: 4315/6485 cut-off events. [2024-06-04 14:57:19,206 INFO L125 PetriNetUnfolderBase]: For 2293311/2293313 co-relation queries the response was YES. [2024-06-04 14:57:19,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75134 conditions, 6485 events. 4315/6485 cut-off events. For 2293311/2293313 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 35628 event pairs, 905 based on Foata normal form. 5/6488 useless extension candidates. Maximal degree in co-relation 74917. Up to 5874 conditions per place. [2024-06-04 14:57:19,322 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 461 selfloop transitions, 162 changer transitions 0/626 dead transitions. [2024-06-04 14:57:19,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 626 transitions, 9409 flow [2024-06-04 14:57:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 14:57:19,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-04 14:57:19,323 INFO L175 Difference]: Start difference. First operand has 463 places, 594 transitions, 7425 flow. Second operand 9 states and 165 transitions. [2024-06-04 14:57:19,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 626 transitions, 9409 flow [2024-06-04 14:57:25,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 626 transitions, 9181 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-04 14:57:25,178 INFO L231 Difference]: Finished difference. Result has 465 places, 594 transitions, 7527 flow [2024-06-04 14:57:25,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7197, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7527, PETRI_PLACES=465, PETRI_TRANSITIONS=594} [2024-06-04 14:57:25,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-04 14:57:25,179 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 594 transitions, 7527 flow [2024-06-04 14:57:25,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:25,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:25,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:25,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 14:57:25,179 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:25,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:25,180 INFO L85 PathProgramCache]: Analyzing trace with hash -857270552, now seen corresponding path program 2 times [2024-06-04 14:57:25,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:25,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394929176] [2024-06-04 14:57:25,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:25,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:25,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:25,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394929176] [2024-06-04 14:57:25,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394929176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:25,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:25,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:25,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820943904] [2024-06-04 14:57:25,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:25,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:25,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:26,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:26,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 594 transitions, 7527 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:26,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:26,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:26,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:27,861 INFO L124 PetriNetUnfolderBase]: 4481/6714 cut-off events. [2024-06-04 14:57:27,862 INFO L125 PetriNetUnfolderBase]: For 2540744/2540746 co-relation queries the response was YES. [2024-06-04 14:57:27,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80471 conditions, 6714 events. 4481/6714 cut-off events. For 2540744/2540746 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 36881 event pairs, 867 based on Foata normal form. 6/6718 useless extension candidates. Maximal degree in co-relation 80253. Up to 6027 conditions per place. [2024-06-04 14:57:27,988 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 514 selfloop transitions, 134 changer transitions 0/651 dead transitions. [2024-06-04 14:57:27,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 651 transitions, 10306 flow [2024-06-04 14:57:27,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 14:57:27,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-04 14:57:27,989 INFO L175 Difference]: Start difference. First operand has 465 places, 594 transitions, 7527 flow. Second operand 9 states and 169 transitions. [2024-06-04 14:57:27,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 651 transitions, 10306 flow [2024-06-04 14:57:35,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 651 transitions, 9970 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:57:35,604 INFO L231 Difference]: Finished difference. Result has 467 places, 614 transitions, 7956 flow [2024-06-04 14:57:35,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7191, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7956, PETRI_PLACES=467, PETRI_TRANSITIONS=614} [2024-06-04 14:57:35,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-04 14:57:35,605 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 614 transitions, 7956 flow [2024-06-04 14:57:35,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:35,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:35,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:35,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 14:57:35,605 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:35,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:35,605 INFO L85 PathProgramCache]: Analyzing trace with hash -857276504, now seen corresponding path program 9 times [2024-06-04 14:57:35,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:35,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701149866] [2024-06-04 14:57:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:35,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:36,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:36,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701149866] [2024-06-04 14:57:36,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701149866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:36,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:36,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:36,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479276497] [2024-06-04 14:57:36,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:36,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:36,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:36,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:36,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:36,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:36,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 614 transitions, 7956 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:36,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:36,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:36,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:38,325 INFO L124 PetriNetUnfolderBase]: 4475/6706 cut-off events. [2024-06-04 14:57:38,325 INFO L125 PetriNetUnfolderBase]: For 2518863/2518865 co-relation queries the response was YES. [2024-06-04 14:57:38,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81335 conditions, 6706 events. 4475/6706 cut-off events. For 2518863/2518865 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 36796 event pairs, 872 based on Foata normal form. 2/6706 useless extension candidates. Maximal degree in co-relation 81115. Up to 6121 conditions per place. [2024-06-04 14:57:38,458 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 482 selfloop transitions, 156 changer transitions 0/641 dead transitions. [2024-06-04 14:57:38,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 641 transitions, 9908 flow [2024-06-04 14:57:38,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 14:57:38,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-04 14:57:38,459 INFO L175 Difference]: Start difference. First operand has 467 places, 614 transitions, 7956 flow. Second operand 9 states and 160 transitions. [2024-06-04 14:57:38,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 641 transitions, 9908 flow [2024-06-04 14:57:44,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 641 transitions, 9678 flow, removed 109 selfloop flow, removed 2 redundant places. [2024-06-04 14:57:44,117 INFO L231 Difference]: Finished difference. Result has 474 places, 614 transitions, 8044 flow [2024-06-04 14:57:44,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7726, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8044, PETRI_PLACES=474, PETRI_TRANSITIONS=614} [2024-06-04 14:57:44,118 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-04 14:57:44,118 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 614 transitions, 8044 flow [2024-06-04 14:57:44,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:44,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:44,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:44,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 14:57:44,119 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:44,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:44,119 INFO L85 PathProgramCache]: Analyzing trace with hash -857276132, now seen corresponding path program 3 times [2024-06-04 14:57:44,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:44,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072461269] [2024-06-04 14:57:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:44,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:44,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:44,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072461269] [2024-06-04 14:57:44,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072461269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:44,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:44,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:44,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589164104] [2024-06-04 14:57:44,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:44,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:44,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:44,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:44,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:45,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:45,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 614 transitions, 8044 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:45,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:45,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:45,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:46,854 INFO L124 PetriNetUnfolderBase]: 4457/6682 cut-off events. [2024-06-04 14:57:46,854 INFO L125 PetriNetUnfolderBase]: For 2525440/2525442 co-relation queries the response was YES. [2024-06-04 14:57:46,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80249 conditions, 6682 events. 4457/6682 cut-off events. For 2525440/2525442 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 36636 event pairs, 883 based on Foata normal form. 6/6686 useless extension candidates. Maximal degree in co-relation 80026. Up to 6008 conditions per place. [2024-06-04 14:57:46,982 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 516 selfloop transitions, 133 changer transitions 0/652 dead transitions. [2024-06-04 14:57:46,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 652 transitions, 10147 flow [2024-06-04 14:57:46,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 14:57:46,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 14:57:46,983 INFO L175 Difference]: Start difference. First operand has 474 places, 614 transitions, 8044 flow. Second operand 9 states and 171 transitions. [2024-06-04 14:57:46,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 652 transitions, 10147 flow [2024-06-04 14:57:52,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 652 transitions, 9773 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-04 14:57:52,506 INFO L231 Difference]: Finished difference. Result has 475 places, 614 transitions, 7942 flow [2024-06-04 14:57:52,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7670, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7942, PETRI_PLACES=475, PETRI_TRANSITIONS=614} [2024-06-04 14:57:52,507 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-04 14:57:52,507 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 614 transitions, 7942 flow [2024-06-04 14:57:52,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:52,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:52,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:52,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 14:57:52,508 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:52,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:52,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1503767678, now seen corresponding path program 4 times [2024-06-04 14:57:52,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:52,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29701349] [2024-06-04 14:57:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:52,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:53,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:53,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29701349] [2024-06-04 14:57:53,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29701349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:53,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:53,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:53,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758414719] [2024-06-04 14:57:53,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:53,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:53,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:53,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:53,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:53,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:53,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 614 transitions, 7942 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:53,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:53,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:53,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:55,403 INFO L124 PetriNetUnfolderBase]: 4583/6856 cut-off events. [2024-06-04 14:57:55,403 INFO L125 PetriNetUnfolderBase]: For 2696570/2696572 co-relation queries the response was YES. [2024-06-04 14:57:55,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83957 conditions, 6856 events. 4583/6856 cut-off events. For 2696570/2696572 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 37682 event pairs, 906 based on Foata normal form. 6/6860 useless extension candidates. Maximal degree in co-relation 83733. Up to 6096 conditions per place. [2024-06-04 14:57:55,537 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 514 selfloop transitions, 141 changer transitions 0/658 dead transitions. [2024-06-04 14:57:55,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 658 transitions, 10611 flow [2024-06-04 14:57:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:55,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 14:57:55,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-04 14:57:55,538 INFO L175 Difference]: Start difference. First operand has 475 places, 614 transitions, 7942 flow. Second operand 9 states and 167 transitions. [2024-06-04 14:57:55,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 658 transitions, 10611 flow [2024-06-04 14:58:02,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 658 transitions, 10345 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 14:58:02,565 INFO L231 Difference]: Finished difference. Result has 477 places, 623 transitions, 8234 flow [2024-06-04 14:58:02,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7688, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8234, PETRI_PLACES=477, PETRI_TRANSITIONS=623} [2024-06-04 14:58:02,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-04 14:58:02,566 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 623 transitions, 8234 flow [2024-06-04 14:58:02,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:02,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:02,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:02,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 14:58:02,566 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:02,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:02,566 INFO L85 PathProgramCache]: Analyzing trace with hash 338833320, now seen corresponding path program 10 times [2024-06-04 14:58:02,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:02,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313632260] [2024-06-04 14:58:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:02,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:03,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:03,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313632260] [2024-06-04 14:58:03,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313632260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:03,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:03,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:03,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749829501] [2024-06-04 14:58:03,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:03,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:03,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:03,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:03,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:03,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:03,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 623 transitions, 8234 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:03,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:03,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:03,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:05,355 INFO L124 PetriNetUnfolderBase]: 4641/6936 cut-off events. [2024-06-04 14:58:05,355 INFO L125 PetriNetUnfolderBase]: For 2758291/2758293 co-relation queries the response was YES. [2024-06-04 14:58:05,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86001 conditions, 6936 events. 4641/6936 cut-off events. For 2758291/2758293 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 38188 event pairs, 883 based on Foata normal form. 2/6936 useless extension candidates. Maximal degree in co-relation 85776. Up to 6326 conditions per place. [2024-06-04 14:58:05,485 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 484 selfloop transitions, 172 changer transitions 0/659 dead transitions. [2024-06-04 14:58:05,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 659 transitions, 10872 flow [2024-06-04 14:58:05,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 14:58:05,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-04 14:58:05,486 INFO L175 Difference]: Start difference. First operand has 477 places, 623 transitions, 8234 flow. Second operand 9 states and 156 transitions. [2024-06-04 14:58:05,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 659 transitions, 10872 flow [2024-06-04 14:58:12,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 659 transitions, 10627 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-04 14:58:12,361 INFO L231 Difference]: Finished difference. Result has 482 places, 635 transitions, 8695 flow [2024-06-04 14:58:12,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7989, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8695, PETRI_PLACES=482, PETRI_TRANSITIONS=635} [2024-06-04 14:58:12,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-04 14:58:12,361 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 635 transitions, 8695 flow [2024-06-04 14:58:12,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:12,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:12,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:12,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 14:58:12,361 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:12,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:12,362 INFO L85 PathProgramCache]: Analyzing trace with hash 335108856, now seen corresponding path program 7 times [2024-06-04 14:58:12,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:12,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454296080] [2024-06-04 14:58:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:12,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:13,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:13,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454296080] [2024-06-04 14:58:13,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454296080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:13,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:13,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:13,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514198150] [2024-06-04 14:58:13,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:13,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:13,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:13,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:13,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:13,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:13,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 635 transitions, 8695 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:13,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:13,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:13,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:15,491 INFO L124 PetriNetUnfolderBase]: 4680/6989 cut-off events. [2024-06-04 14:58:15,491 INFO L125 PetriNetUnfolderBase]: For 2837313/2837313 co-relation queries the response was YES. [2024-06-04 14:58:15,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86734 conditions, 6989 events. 4680/6989 cut-off events. For 2837313/2837313 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 38515 event pairs, 953 based on Foata normal form. 3/6990 useless extension candidates. Maximal degree in co-relation 86508. Up to 6796 conditions per place. [2024-06-04 14:58:15,611 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 597 selfloop transitions, 68 changer transitions 0/668 dead transitions. [2024-06-04 14:58:15,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 668 transitions, 10565 flow [2024-06-04 14:58:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:15,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 14:58:15,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 14:58:15,612 INFO L175 Difference]: Start difference. First operand has 482 places, 635 transitions, 8695 flow. Second operand 9 states and 157 transitions. [2024-06-04 14:58:15,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 668 transitions, 10565 flow [2024-06-04 14:58:22,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 668 transitions, 10274 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-04 14:58:22,421 INFO L231 Difference]: Finished difference. Result has 487 places, 641 transitions, 8648 flow [2024-06-04 14:58:22,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8404, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8648, PETRI_PLACES=487, PETRI_TRANSITIONS=641} [2024-06-04 14:58:22,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 444 predicate places. [2024-06-04 14:58:22,421 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 641 transitions, 8648 flow [2024-06-04 14:58:22,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:22,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:22,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:22,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 14:58:22,422 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:22,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:22,422 INFO L85 PathProgramCache]: Analyzing trace with hash 338827926, now seen corresponding path program 8 times [2024-06-04 14:58:22,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:22,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983030880] [2024-06-04 14:58:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:22,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:23,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:23,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983030880] [2024-06-04 14:58:23,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983030880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:23,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:23,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:23,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844885761] [2024-06-04 14:58:23,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:23,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:23,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:23,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:23,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:23,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:23,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 641 transitions, 8648 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:23,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:23,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:23,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:25,333 INFO L124 PetriNetUnfolderBase]: 4743/7077 cut-off events. [2024-06-04 14:58:25,334 INFO L125 PetriNetUnfolderBase]: For 2943555/2943557 co-relation queries the response was YES. [2024-06-04 14:58:25,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88157 conditions, 7077 events. 4743/7077 cut-off events. For 2943555/2943557 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 39040 event pairs, 963 based on Foata normal form. 5/7080 useless extension candidates. Maximal degree in co-relation 87930. Up to 6416 conditions per place. [2024-06-04 14:58:25,469 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 510 selfloop transitions, 168 changer transitions 0/681 dead transitions. [2024-06-04 14:58:25,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 681 transitions, 11544 flow [2024-06-04 14:58:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 14:58:25,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-04 14:58:25,470 INFO L175 Difference]: Start difference. First operand has 487 places, 641 transitions, 8648 flow. Second operand 9 states and 164 transitions. [2024-06-04 14:58:25,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 681 transitions, 11544 flow [2024-06-04 14:58:34,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 681 transitions, 11442 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 14:58:34,100 INFO L231 Difference]: Finished difference. Result has 491 places, 650 transitions, 9056 flow [2024-06-04 14:58:34,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8546, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9056, PETRI_PLACES=491, PETRI_TRANSITIONS=650} [2024-06-04 14:58:34,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-04 14:58:34,100 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 650 transitions, 9056 flow [2024-06-04 14:58:34,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:34,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:34,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:34,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 14:58:34,101 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:34,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:34,101 INFO L85 PathProgramCache]: Analyzing trace with hash -558369382, now seen corresponding path program 9 times [2024-06-04 14:58:34,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:34,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223370607] [2024-06-04 14:58:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:34,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:34,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:34,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223370607] [2024-06-04 14:58:34,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223370607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:34,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:34,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:34,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63397475] [2024-06-04 14:58:34,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:34,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:34,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:34,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:34,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:35,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:35,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 650 transitions, 9056 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:35,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:35,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:35,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:37,061 INFO L124 PetriNetUnfolderBase]: 4758/7097 cut-off events. [2024-06-04 14:58:37,061 INFO L125 PetriNetUnfolderBase]: For 2982190/2982190 co-relation queries the response was YES. [2024-06-04 14:58:37,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89098 conditions, 7097 events. 4758/7097 cut-off events. For 2982190/2982190 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 39139 event pairs, 965 based on Foata normal form. 3/7098 useless extension candidates. Maximal degree in co-relation 88869. Up to 6927 conditions per place. [2024-06-04 14:58:37,196 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 610 selfloop transitions, 64 changer transitions 0/677 dead transitions. [2024-06-04 14:58:37,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 677 transitions, 10580 flow [2024-06-04 14:58:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:37,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-04 14:58:37,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-04 14:58:37,197 INFO L175 Difference]: Start difference. First operand has 491 places, 650 transitions, 9056 flow. Second operand 9 states and 152 transitions. [2024-06-04 14:58:37,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 677 transitions, 10580 flow [2024-06-04 14:58:45,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 677 transitions, 10333 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-04 14:58:45,642 INFO L231 Difference]: Finished difference. Result has 496 places, 653 transitions, 9005 flow [2024-06-04 14:58:45,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8815, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9005, PETRI_PLACES=496, PETRI_TRANSITIONS=653} [2024-06-04 14:58:45,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-04 14:58:45,643 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 653 transitions, 9005 flow [2024-06-04 14:58:45,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:45,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:45,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:45,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 14:58:45,644 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:45,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:45,644 INFO L85 PathProgramCache]: Analyzing trace with hash 989023986, now seen corresponding path program 5 times [2024-06-04 14:58:45,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:45,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755306856] [2024-06-04 14:58:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:45,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:46,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:46,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755306856] [2024-06-04 14:58:46,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755306856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:46,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:46,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:46,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606603797] [2024-06-04 14:58:46,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:46,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:46,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:46,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:46,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:46,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:46,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 653 transitions, 9005 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:46,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:46,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:46,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:48,690 INFO L124 PetriNetUnfolderBase]: 4788/7140 cut-off events. [2024-06-04 14:58:48,690 INFO L125 PetriNetUnfolderBase]: For 3055933/3055935 co-relation queries the response was YES. [2024-06-04 14:58:48,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89219 conditions, 7140 events. 4788/7140 cut-off events. For 3055933/3055935 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 39408 event pairs, 893 based on Foata normal form. 6/7144 useless extension candidates. Maximal degree in co-relation 88989. Up to 6360 conditions per place. [2024-06-04 14:58:48,812 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 535 selfloop transitions, 150 changer transitions 0/688 dead transitions. [2024-06-04 14:58:48,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 688 transitions, 11234 flow [2024-06-04 14:58:48,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:48,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 14:58:48,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-04 14:58:48,813 INFO L175 Difference]: Start difference. First operand has 496 places, 653 transitions, 9005 flow. Second operand 9 states and 163 transitions. [2024-06-04 14:58:48,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 688 transitions, 11234 flow [2024-06-04 14:58:56,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 688 transitions, 11084 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 14:58:56,977 INFO L231 Difference]: Finished difference. Result has 498 places, 656 transitions, 9231 flow [2024-06-04 14:58:56,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8855, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9231, PETRI_PLACES=498, PETRI_TRANSITIONS=656} [2024-06-04 14:58:56,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-04 14:58:56,978 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 656 transitions, 9231 flow [2024-06-04 14:58:56,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:56,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:56,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:56,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 14:58:56,978 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:56,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:56,978 INFO L85 PathProgramCache]: Analyzing trace with hash 338827585, now seen corresponding path program 6 times [2024-06-04 14:58:56,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:56,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376719426] [2024-06-04 14:58:56,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:56,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:57,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:57,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376719426] [2024-06-04 14:58:57,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376719426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:57,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:57,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:57,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135582335] [2024-06-04 14:58:57,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:57,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:57,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:57,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:57,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:58,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:58,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 656 transitions, 9231 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:58,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:58,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:58,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:59,986 INFO L124 PetriNetUnfolderBase]: 4793/7147 cut-off events. [2024-06-04 14:58:59,986 INFO L125 PetriNetUnfolderBase]: For 3038986/3038988 co-relation queries the response was YES. [2024-06-04 14:59:00,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89963 conditions, 7147 events. 4793/7147 cut-off events. For 3038986/3038988 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 39459 event pairs, 1024 based on Foata normal form. 3/7148 useless extension candidates. Maximal degree in co-relation 89732. Up to 6968 conditions per place. [2024-06-04 14:59:00,132 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 580 selfloop transitions, 93 changer transitions 0/676 dead transitions. [2024-06-04 14:59:00,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 676 transitions, 10668 flow [2024-06-04 14:59:00,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-04 14:59:00,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-04 14:59:00,133 INFO L175 Difference]: Start difference. First operand has 498 places, 656 transitions, 9231 flow. Second operand 9 states and 145 transitions. [2024-06-04 14:59:00,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 676 transitions, 10668 flow [2024-06-04 14:59:07,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 676 transitions, 10339 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-04 14:59:07,931 INFO L231 Difference]: Finished difference. Result has 501 places, 659 transitions, 9147 flow [2024-06-04 14:59:07,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8902, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9147, PETRI_PLACES=501, PETRI_TRANSITIONS=659} [2024-06-04 14:59:07,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-04 14:59:07,932 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 659 transitions, 9147 flow [2024-06-04 14:59:07,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:07,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:07,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:07,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 14:59:07,932 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:07,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:07,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1069293342, now seen corresponding path program 10 times [2024-06-04 14:59:07,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:07,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644394485] [2024-06-04 14:59:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:07,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:08,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:08,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644394485] [2024-06-04 14:59:08,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644394485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:08,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:08,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:08,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882244761] [2024-06-04 14:59:08,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:08,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:08,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:08,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:08,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:08,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:59:08,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 659 transitions, 9147 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:08,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:08,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:59:08,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:11,213 INFO L124 PetriNetUnfolderBase]: 4808/7168 cut-off events. [2024-06-04 14:59:11,222 INFO L125 PetriNetUnfolderBase]: For 3095752/3095754 co-relation queries the response was YES. [2024-06-04 14:59:11,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89660 conditions, 7168 events. 4808/7168 cut-off events. For 3095752/3095754 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39581 event pairs, 969 based on Foata normal form. 5/7171 useless extension candidates. Maximal degree in co-relation 89428. Up to 6493 conditions per place. [2024-06-04 14:59:11,347 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 505 selfloop transitions, 182 changer transitions 0/690 dead transitions. [2024-06-04 14:59:11,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 690 transitions, 11635 flow [2024-06-04 14:59:11,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 14:59:11,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-04 14:59:11,348 INFO L175 Difference]: Start difference. First operand has 501 places, 659 transitions, 9147 flow. Second operand 9 states and 160 transitions. [2024-06-04 14:59:11,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 690 transitions, 11635 flow [2024-06-04 14:59:19,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 690 transitions, 11421 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-04 14:59:19,108 INFO L231 Difference]: Finished difference. Result has 503 places, 662 transitions, 9347 flow [2024-06-04 14:59:19,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8933, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9347, PETRI_PLACES=503, PETRI_TRANSITIONS=662} [2024-06-04 14:59:19,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-04 14:59:19,108 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 662 transitions, 9347 flow [2024-06-04 14:59:19,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:19,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:19,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:19,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 14:59:19,109 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:19,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:19,109 INFO L85 PathProgramCache]: Analyzing trace with hash 338839086, now seen corresponding path program 11 times [2024-06-04 14:59:19,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:19,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861340592] [2024-06-04 14:59:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:19,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:19,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:19,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861340592] [2024-06-04 14:59:19,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861340592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:19,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:19,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:19,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221232619] [2024-06-04 14:59:19,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:19,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:19,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:19,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:19,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:19,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:59:19,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 662 transitions, 9347 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:19,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:19,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:59:19,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:21,966 INFO L124 PetriNetUnfolderBase]: 4799/7156 cut-off events. [2024-06-04 14:59:21,966 INFO L125 PetriNetUnfolderBase]: For 3100677/3100679 co-relation queries the response was YES. [2024-06-04 14:59:22,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89781 conditions, 7156 events. 4799/7156 cut-off events. For 3100677/3100679 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39514 event pairs, 955 based on Foata normal form. 5/7159 useless extension candidates. Maximal degree in co-relation 89548. Up to 6486 conditions per place. [2024-06-04 14:59:22,112 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 514 selfloop transitions, 175 changer transitions 0/692 dead transitions. [2024-06-04 14:59:22,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 692 transitions, 11825 flow [2024-06-04 14:59:22,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 14:59:22,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-04 14:59:22,113 INFO L175 Difference]: Start difference. First operand has 503 places, 662 transitions, 9347 flow. Second operand 9 states and 163 transitions. [2024-06-04 14:59:22,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 692 transitions, 11825 flow [2024-06-04 14:59:30,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 692 transitions, 11468 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-04 14:59:30,698 INFO L231 Difference]: Finished difference. Result has 507 places, 662 transitions, 9346 flow [2024-06-04 14:59:30,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8990, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9346, PETRI_PLACES=507, PETRI_TRANSITIONS=662} [2024-06-04 14:59:30,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-04 14:59:30,699 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 662 transitions, 9346 flow [2024-06-04 14:59:30,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:30,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:30,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:30,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 14:59:30,699 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:30,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:30,699 INFO L85 PathProgramCache]: Analyzing trace with hash 977851369, now seen corresponding path program 7 times [2024-06-04 14:59:30,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:30,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35526064] [2024-06-04 14:59:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:31,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:31,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35526064] [2024-06-04 14:59:31,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35526064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:31,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:31,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:31,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599687331] [2024-06-04 14:59:31,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:31,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:31,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:31,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:31,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:59:31,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 662 transitions, 9346 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:31,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:31,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:59:31,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:34,050 INFO L124 PetriNetUnfolderBase]: 4804/7162 cut-off events. [2024-06-04 14:59:34,050 INFO L125 PetriNetUnfolderBase]: For 3115434/3115434 co-relation queries the response was YES. [2024-06-04 14:59:34,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89909 conditions, 7162 events. 4804/7162 cut-off events. For 3115434/3115434 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39502 event pairs, 1031 based on Foata normal form. 1/7161 useless extension candidates. Maximal degree in co-relation 89675. Up to 7090 conditions per place. [2024-06-04 14:59:34,188 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 644 selfloop transitions, 36 changer transitions 0/683 dead transitions. [2024-06-04 14:59:34,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 683 transitions, 10790 flow [2024-06-04 14:59:34,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:59:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:59:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-04 14:59:34,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-04 14:59:34,189 INFO L175 Difference]: Start difference. First operand has 507 places, 662 transitions, 9346 flow. Second operand 10 states and 153 transitions. [2024-06-04 14:59:34,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 683 transitions, 10790 flow [2024-06-04 14:59:43,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 683 transitions, 10432 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:59:43,488 INFO L231 Difference]: Finished difference. Result has 509 places, 665 transitions, 9111 flow [2024-06-04 14:59:43,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8988, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9111, PETRI_PLACES=509, PETRI_TRANSITIONS=665} [2024-06-04 14:59:43,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 466 predicate places. [2024-06-04 14:59:43,488 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 665 transitions, 9111 flow [2024-06-04 14:59:43,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:43,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:43,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:43,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 14:59:43,488 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:43,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:43,489 INFO L85 PathProgramCache]: Analyzing trace with hash 981672336, now seen corresponding path program 6 times [2024-06-04 14:59:43,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:43,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519522309] [2024-06-04 14:59:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:43,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:44,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:44,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519522309] [2024-06-04 14:59:44,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519522309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:44,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:44,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:44,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597873823] [2024-06-04 14:59:44,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:44,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:44,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:44,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:44,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:44,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:59:44,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 665 transitions, 9111 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:44,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:44,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:59:44,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:46,729 INFO L124 PetriNetUnfolderBase]: 4786/7139 cut-off events. [2024-06-04 14:59:46,730 INFO L125 PetriNetUnfolderBase]: For 3137865/3137867 co-relation queries the response was YES. [2024-06-04 14:59:46,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88515 conditions, 7139 events. 4786/7139 cut-off events. For 3137865/3137867 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39432 event pairs, 888 based on Foata normal form. 6/7143 useless extension candidates. Maximal degree in co-relation 88280. Up to 6372 conditions per place. [2024-06-04 14:59:46,852 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 554 selfloop transitions, 143 changer transitions 0/700 dead transitions. [2024-06-04 14:59:46,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 700 transitions, 11346 flow [2024-06-04 14:59:46,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:46,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:46,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 14:59:46,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 14:59:46,853 INFO L175 Difference]: Start difference. First operand has 509 places, 665 transitions, 9111 flow. Second operand 9 states and 168 transitions. [2024-06-04 14:59:46,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 700 transitions, 11346 flow [2024-06-04 14:59:55,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 700 transitions, 11221 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-04 14:59:55,467 INFO L231 Difference]: Finished difference. Result has 511 places, 665 transitions, 9278 flow [2024-06-04 14:59:55,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8986, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9278, PETRI_PLACES=511, PETRI_TRANSITIONS=665} [2024-06-04 14:59:55,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 468 predicate places. [2024-06-04 14:59:55,467 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 665 transitions, 9278 flow [2024-06-04 14:59:55,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:55,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:55,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:55,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 14:59:55,468 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:55,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:55,468 INFO L85 PathProgramCache]: Analyzing trace with hash 977941734, now seen corresponding path program 11 times [2024-06-04 14:59:55,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:55,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917810834] [2024-06-04 14:59:55,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:55,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:56,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:56,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917810834] [2024-06-04 14:59:56,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917810834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:56,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:56,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:56,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754935734] [2024-06-04 14:59:56,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:56,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:56,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:56,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:56,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:56,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:59:56,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 665 transitions, 9278 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:56,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:56,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:59:56,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:58,783 INFO L124 PetriNetUnfolderBase]: 4780/7130 cut-off events. [2024-06-04 14:59:58,783 INFO L125 PetriNetUnfolderBase]: For 3104656/3104656 co-relation queries the response was YES. [2024-06-04 14:59:58,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88760 conditions, 7130 events. 4780/7130 cut-off events. For 3104656/3104656 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 39406 event pairs, 1018 based on Foata normal form. 2/7130 useless extension candidates. Maximal degree in co-relation 88524. Up to 7060 conditions per place. [2024-06-04 14:59:58,914 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 647 selfloop transitions, 33 changer transitions 0/683 dead transitions. [2024-06-04 14:59:58,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 683 transitions, 10690 flow [2024-06-04 14:59:58,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:58,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-04 14:59:58,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-04 14:59:58,915 INFO L175 Difference]: Start difference. First operand has 511 places, 665 transitions, 9278 flow. Second operand 9 states and 142 transitions. [2024-06-04 14:59:58,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 683 transitions, 10690 flow [2024-06-04 15:00:07,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 683 transitions, 10396 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 15:00:07,205 INFO L231 Difference]: Finished difference. Result has 512 places, 665 transitions, 9056 flow [2024-06-04 15:00:07,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8984, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9056, PETRI_PLACES=512, PETRI_TRANSITIONS=665} [2024-06-04 15:00:07,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 469 predicate places. [2024-06-04 15:00:07,206 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 665 transitions, 9056 flow [2024-06-04 15:00:07,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:07,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:07,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:07,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 15:00:07,206 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:07,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:07,206 INFO L85 PathProgramCache]: Analyzing trace with hash 852701280, now seen corresponding path program 12 times [2024-06-04 15:00:07,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:07,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785507026] [2024-06-04 15:00:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:07,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:08,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:08,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785507026] [2024-06-04 15:00:08,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785507026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:08,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:08,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:08,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737938203] [2024-06-04 15:00:08,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:08,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:08,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:08,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:08,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:08,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:08,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 665 transitions, 9056 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:08,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:08,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:08,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:10,591 INFO L124 PetriNetUnfolderBase]: 4774/7123 cut-off events. [2024-06-04 15:00:10,591 INFO L125 PetriNetUnfolderBase]: For 3113427/3113429 co-relation queries the response was YES. [2024-06-04 15:00:10,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88077 conditions, 7123 events. 4774/7123 cut-off events. For 3113427/3113429 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 39345 event pairs, 916 based on Foata normal form. 2/7123 useless extension candidates. Maximal degree in co-relation 87840. Up to 6519 conditions per place. [2024-06-04 15:00:10,720 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 516 selfloop transitions, 170 changer transitions 0/689 dead transitions. [2024-06-04 15:00:10,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 689 transitions, 11152 flow [2024-06-04 15:00:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:00:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:00:10,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:00:10,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 15:00:10,721 INFO L175 Difference]: Start difference. First operand has 512 places, 665 transitions, 9056 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:00:10,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 689 transitions, 11152 flow [2024-06-04 15:00:19,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 689 transitions, 10996 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-04 15:00:19,932 INFO L231 Difference]: Finished difference. Result has 514 places, 665 transitions, 9246 flow [2024-06-04 15:00:19,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8900, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9246, PETRI_PLACES=514, PETRI_TRANSITIONS=665} [2024-06-04 15:00:19,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-04 15:00:19,932 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 665 transitions, 9246 flow [2024-06-04 15:00:19,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:19,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:19,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:19,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 15:00:19,932 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:19,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:19,933 INFO L85 PathProgramCache]: Analyzing trace with hash 335346006, now seen corresponding path program 12 times [2024-06-04 15:00:19,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:19,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635442489] [2024-06-04 15:00:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:19,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:20,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:20,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635442489] [2024-06-04 15:00:20,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635442489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:20,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:20,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:20,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702527532] [2024-06-04 15:00:20,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:20,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:20,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:20,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:20,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:20,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:20,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 665 transitions, 9246 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:20,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:20,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:20,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:23,519 INFO L124 PetriNetUnfolderBase]: 4765/7110 cut-off events. [2024-06-04 15:00:23,519 INFO L125 PetriNetUnfolderBase]: For 3126304/3126304 co-relation queries the response was YES. [2024-06-04 15:00:23,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88090 conditions, 7110 events. 4765/7110 cut-off events. For 3126304/3126304 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39288 event pairs, 973 based on Foata normal form. 3/7111 useless extension candidates. Maximal degree in co-relation 87852. Up to 6915 conditions per place. [2024-06-04 15:00:23,646 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 622 selfloop transitions, 72 changer transitions 0/697 dead transitions. [2024-06-04 15:00:23,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 697 transitions, 10830 flow [2024-06-04 15:00:23,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:00:23,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:00:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-04 15:00:23,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-04 15:00:23,647 INFO L175 Difference]: Start difference. First operand has 514 places, 665 transitions, 9246 flow. Second operand 11 states and 184 transitions. [2024-06-04 15:00:23,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 697 transitions, 10830 flow [2024-06-04 15:00:32,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 697 transitions, 10460 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 15:00:32,716 INFO L231 Difference]: Finished difference. Result has 517 places, 665 transitions, 9026 flow [2024-06-04 15:00:32,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8876, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9026, PETRI_PLACES=517, PETRI_TRANSITIONS=665} [2024-06-04 15:00:32,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 474 predicate places. [2024-06-04 15:00:32,717 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 665 transitions, 9026 flow [2024-06-04 15:00:32,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:32,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:32,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:32,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 15:00:32,717 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:32,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:32,717 INFO L85 PathProgramCache]: Analyzing trace with hash 977859305, now seen corresponding path program 2 times [2024-06-04 15:00:32,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:32,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215406585] [2024-06-04 15:00:32,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:32,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:34,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:34,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215406585] [2024-06-04 15:00:34,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215406585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:34,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:34,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:00:34,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764165524] [2024-06-04 15:00:34,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:34,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:00:34,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:34,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:00:34,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:00:34,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:34,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 665 transitions, 9026 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:34,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:34,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:34,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:36,773 INFO L124 PetriNetUnfolderBase]: 4791/7146 cut-off events. [2024-06-04 15:00:36,773 INFO L125 PetriNetUnfolderBase]: For 3176542/3176542 co-relation queries the response was YES. [2024-06-04 15:00:36,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88633 conditions, 7146 events. 4791/7146 cut-off events. For 3176542/3176542 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 39493 event pairs, 974 based on Foata normal form. 2/7146 useless extension candidates. Maximal degree in co-relation 88394. Up to 6944 conditions per place. [2024-06-04 15:00:36,915 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 619 selfloop transitions, 82 changer transitions 0/704 dead transitions. [2024-06-04 15:00:36,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 704 transitions, 11066 flow [2024-06-04 15:00:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:00:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:00:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-04 15:00:36,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-04 15:00:36,916 INFO L175 Difference]: Start difference. First operand has 517 places, 665 transitions, 9026 flow. Second operand 12 states and 195 transitions. [2024-06-04 15:00:36,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 704 transitions, 11066 flow [2024-06-04 15:00:46,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 704 transitions, 10886 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-04 15:00:46,714 INFO L231 Difference]: Finished difference. Result has 519 places, 674 transitions, 9225 flow [2024-06-04 15:00:46,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8851, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9225, PETRI_PLACES=519, PETRI_TRANSITIONS=674} [2024-06-04 15:00:46,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-04 15:00:46,714 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 674 transitions, 9225 flow [2024-06-04 15:00:46,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:46,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:46,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:46,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 15:00:46,715 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:46,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1080458178, now seen corresponding path program 4 times [2024-06-04 15:00:46,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:46,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602369880] [2024-06-04 15:00:46,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:46,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:47,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:47,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602369880] [2024-06-04 15:00:47,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602369880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:47,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:47,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:00:47,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270462420] [2024-06-04 15:00:47,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:47,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:00:47,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:47,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:00:47,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:00:47,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:47,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 674 transitions, 9225 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:47,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:47,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:47,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:50,357 INFO L124 PetriNetUnfolderBase]: 4799/7158 cut-off events. [2024-06-04 15:00:50,358 INFO L125 PetriNetUnfolderBase]: For 3216926/3216926 co-relation queries the response was YES. [2024-06-04 15:00:50,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89175 conditions, 7158 events. 4799/7158 cut-off events. For 3216926/3216926 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 39550 event pairs, 1010 based on Foata normal form. 2/7158 useless extension candidates. Maximal degree in co-relation 88934. Up to 7049 conditions per place. [2024-06-04 15:00:50,584 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 640 selfloop transitions, 62 changer transitions 0/705 dead transitions. [2024-06-04 15:00:50,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 705 transitions, 10910 flow [2024-06-04 15:00:50,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:00:50,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:00:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-04 15:00:50,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-04 15:00:50,586 INFO L175 Difference]: Start difference. First operand has 519 places, 674 transitions, 9225 flow. Second operand 10 states and 158 transitions. [2024-06-04 15:00:50,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 705 transitions, 10910 flow [2024-06-04 15:00:59,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 705 transitions, 10741 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-04 15:00:59,705 INFO L231 Difference]: Finished difference. Result has 525 places, 686 transitions, 9474 flow [2024-06-04 15:00:59,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9063, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9474, PETRI_PLACES=525, PETRI_TRANSITIONS=686} [2024-06-04 15:00:59,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 482 predicate places. [2024-06-04 15:00:59,706 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 686 transitions, 9474 flow [2024-06-04 15:00:59,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:59,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:59,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:59,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-04 15:00:59,706 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:59,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:59,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1069016109, now seen corresponding path program 1 times [2024-06-04 15:00:59,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:59,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021510329] [2024-06-04 15:00:59,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:59,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:01,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:01,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021510329] [2024-06-04 15:01:01,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021510329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:01,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:01,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:01:01,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903775691] [2024-06-04 15:01:01,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:01,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:01:01,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:01,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:01:01,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:01:01,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:01:01,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 686 transitions, 9474 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:01,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:01,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:01:01,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:03,584 INFO L124 PetriNetUnfolderBase]: 4462/6764 cut-off events. [2024-06-04 15:01:03,584 INFO L125 PetriNetUnfolderBase]: For 3328590/3328637 co-relation queries the response was YES. [2024-06-04 15:01:03,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87478 conditions, 6764 events. 4462/6764 cut-off events. For 3328590/3328637 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 38539 event pairs, 901 based on Foata normal form. 10/6687 useless extension candidates. Maximal degree in co-relation 87232. Up to 6363 conditions per place. [2024-06-04 15:01:03,714 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 573 selfloop transitions, 73 changer transitions 0/710 dead transitions. [2024-06-04 15:01:03,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 710 transitions, 10953 flow [2024-06-04 15:01:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:03,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-04 15:01:03,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-04 15:01:03,715 INFO L175 Difference]: Start difference. First operand has 525 places, 686 transitions, 9474 flow. Second operand 9 states and 152 transitions. [2024-06-04 15:01:03,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 710 transitions, 10953 flow [2024-06-04 15:01:13,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 710 transitions, 10826 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-04 15:01:13,289 INFO L231 Difference]: Finished difference. Result has 530 places, 690 transitions, 9644 flow [2024-06-04 15:01:13,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9347, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9644, PETRI_PLACES=530, PETRI_TRANSITIONS=690} [2024-06-04 15:01:13,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 487 predicate places. [2024-06-04 15:01:13,289 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 690 transitions, 9644 flow [2024-06-04 15:01:13,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:13,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:13,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:13,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-04 15:01:13,290 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:13,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:13,290 INFO L85 PathProgramCache]: Analyzing trace with hash 346067790, now seen corresponding path program 5 times [2024-06-04 15:01:13,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:13,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633306785] [2024-06-04 15:01:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:13,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:14,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:14,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633306785] [2024-06-04 15:01:14,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633306785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:14,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:14,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:01:14,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274616143] [2024-06-04 15:01:14,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:14,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:01:14,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:14,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:01:14,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:01:14,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:14,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 690 transitions, 9644 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:14,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:14,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:14,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:17,138 INFO L124 PetriNetUnfolderBase]: 4867/7262 cut-off events. [2024-06-04 15:01:17,138 INFO L125 PetriNetUnfolderBase]: For 3431321/3431321 co-relation queries the response was YES. [2024-06-04 15:01:17,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91069 conditions, 7262 events. 4867/7262 cut-off events. For 3431321/3431321 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40240 event pairs, 980 based on Foata normal form. 12/7272 useless extension candidates. Maximal degree in co-relation 90821. Up to 7046 conditions per place. [2024-06-04 15:01:17,280 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 641 selfloop transitions, 75 changer transitions 0/719 dead transitions. [2024-06-04 15:01:17,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 719 transitions, 11248 flow [2024-06-04 15:01:17,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:01:17,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:01:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-04 15:01:17,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 15:01:17,281 INFO L175 Difference]: Start difference. First operand has 530 places, 690 transitions, 9644 flow. Second operand 10 states and 168 transitions. [2024-06-04 15:01:17,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 719 transitions, 11248 flow [2024-06-04 15:01:27,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 719 transitions, 11013 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:27,834 INFO L231 Difference]: Finished difference. Result has 534 places, 692 transitions, 9620 flow [2024-06-04 15:01:27,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9409, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9620, PETRI_PLACES=534, PETRI_TRANSITIONS=692} [2024-06-04 15:01:27,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-04 15:01:27,835 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 692 transitions, 9620 flow [2024-06-04 15:01:27,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:27,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:27,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:27,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-04 15:01:27,835 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:27,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:27,836 INFO L85 PathProgramCache]: Analyzing trace with hash 346068131, now seen corresponding path program 3 times [2024-06-04 15:01:27,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:27,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593690225] [2024-06-04 15:01:27,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:27,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:29,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:29,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593690225] [2024-06-04 15:01:29,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593690225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:29,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:29,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:01:29,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369471853] [2024-06-04 15:01:29,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:29,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:01:29,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:29,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:01:29,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:01:29,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:29,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 692 transitions, 9620 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:29,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:29,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:29,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:32,081 INFO L124 PetriNetUnfolderBase]: 4871/7268 cut-off events. [2024-06-04 15:01:32,081 INFO L125 PetriNetUnfolderBase]: For 3309517/3309517 co-relation queries the response was YES. [2024-06-04 15:01:32,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90716 conditions, 7268 events. 4871/7268 cut-off events. For 3309517/3309517 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 40269 event pairs, 963 based on Foata normal form. 2/7268 useless extension candidates. Maximal degree in co-relation 90468. Up to 7086 conditions per place. [2024-06-04 15:01:32,217 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 637 selfloop transitions, 80 changer transitions 0/720 dead transitions. [2024-06-04 15:01:32,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 720 transitions, 11192 flow [2024-06-04 15:01:32,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:01:32,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:01:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-04 15:01:32,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852813852813853 [2024-06-04 15:01:32,219 INFO L175 Difference]: Start difference. First operand has 534 places, 692 transitions, 9620 flow. Second operand 11 states and 178 transitions. [2024-06-04 15:01:32,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 720 transitions, 11192 flow [2024-06-04 15:01:42,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 720 transitions, 10981 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-04 15:01:42,927 INFO L231 Difference]: Finished difference. Result has 537 places, 695 transitions, 9641 flow [2024-06-04 15:01:42,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9415, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9641, PETRI_PLACES=537, PETRI_TRANSITIONS=695} [2024-06-04 15:01:42,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 494 predicate places. [2024-06-04 15:01:42,928 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 695 transitions, 9641 flow [2024-06-04 15:01:42,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:42,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:42,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:42,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-04 15:01:42,928 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:42,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:42,929 INFO L85 PathProgramCache]: Analyzing trace with hash 335016600, now seen corresponding path program 6 times [2024-06-04 15:01:42,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:42,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343064807] [2024-06-04 15:01:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:42,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:43,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:43,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343064807] [2024-06-04 15:01:43,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343064807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:43,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:43,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:01:43,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38418284] [2024-06-04 15:01:43,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:43,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:01:43,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:43,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:01:43,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:01:44,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:44,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 695 transitions, 9641 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:44,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:44,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:44,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:46,486 INFO L124 PetriNetUnfolderBase]: 4892/7299 cut-off events. [2024-06-04 15:01:46,486 INFO L125 PetriNetUnfolderBase]: For 3373277/3373277 co-relation queries the response was YES. [2024-06-04 15:01:46,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91253 conditions, 7299 events. 4892/7299 cut-off events. For 3373277/3373277 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 40518 event pairs, 1020 based on Foata normal form. 2/7299 useless extension candidates. Maximal degree in co-relation 91004. Up to 7161 conditions per place. [2024-06-04 15:01:46,767 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 649 selfloop transitions, 69 changer transitions 0/721 dead transitions. [2024-06-04 15:01:46,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 721 transitions, 11590 flow [2024-06-04 15:01:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:01:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:01:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-04 15:01:46,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 15:01:46,768 INFO L175 Difference]: Start difference. First operand has 537 places, 695 transitions, 9641 flow. Second operand 10 states and 160 transitions. [2024-06-04 15:01:46,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 721 transitions, 11590 flow [2024-06-04 15:01:57,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 721 transitions, 11399 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-04 15:01:57,485 INFO L231 Difference]: Finished difference. Result has 538 places, 700 transitions, 9740 flow [2024-06-04 15:01:57,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9450, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9740, PETRI_PLACES=538, PETRI_TRANSITIONS=700} [2024-06-04 15:01:57,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 495 predicate places. [2024-06-04 15:01:57,485 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 700 transitions, 9740 flow [2024-06-04 15:01:57,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:57,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:57,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:57,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-04 15:01:57,486 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:57,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash 335343030, now seen corresponding path program 7 times [2024-06-04 15:01:57,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:57,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58730992] [2024-06-04 15:01:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:57,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:58,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:58,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58730992] [2024-06-04 15:01:58,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58730992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:58,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:58,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:01:58,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501514887] [2024-06-04 15:01:58,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:58,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:01:58,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:58,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:01:58,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:01:58,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:58,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 700 transitions, 9740 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:58,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:58,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:58,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:01,330 INFO L124 PetriNetUnfolderBase]: 4931/7360 cut-off events. [2024-06-04 15:02:01,330 INFO L125 PetriNetUnfolderBase]: For 3526544/3526544 co-relation queries the response was YES. [2024-06-04 15:02:01,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91784 conditions, 7360 events. 4931/7360 cut-off events. For 3526544/3526544 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 40880 event pairs, 983 based on Foata normal form. 12/7370 useless extension candidates. Maximal degree in co-relation 91534. Up to 7130 conditions per place. [2024-06-04 15:02:01,463 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 649 selfloop transitions, 79 changer transitions 0/731 dead transitions. [2024-06-04 15:02:01,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 731 transitions, 11378 flow [2024-06-04 15:02:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:02:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:02:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-04 15:02:01,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-04 15:02:01,464 INFO L175 Difference]: Start difference. First operand has 538 places, 700 transitions, 9740 flow. Second operand 10 states and 172 transitions. [2024-06-04 15:02:01,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 731 transitions, 11378 flow [2024-06-04 15:02:14,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 731 transitions, 11215 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-04 15:02:14,128 INFO L231 Difference]: Finished difference. Result has 542 places, 702 transitions, 9801 flow [2024-06-04 15:02:14,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9577, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9801, PETRI_PLACES=542, PETRI_TRANSITIONS=702} [2024-06-04 15:02:14,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 499 predicate places. [2024-06-04 15:02:14,128 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 702 transitions, 9801 flow [2024-06-04 15:02:14,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:14,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:14,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:14,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-04 15:02:14,128 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:14,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:14,129 INFO L85 PathProgramCache]: Analyzing trace with hash -43088834, now seen corresponding path program 13 times [2024-06-04 15:02:14,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:14,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804451] [2024-06-04 15:02:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:14,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:14,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:14,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804451] [2024-06-04 15:02:14,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:14,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:14,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:14,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288959206] [2024-06-04 15:02:14,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:14,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:14,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:15,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:02:15,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 702 transitions, 9801 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:15,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:15,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:02:15,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:17,687 INFO L124 PetriNetUnfolderBase]: 4973/7418 cut-off events. [2024-06-04 15:02:17,687 INFO L125 PetriNetUnfolderBase]: For 3489563/3489563 co-relation queries the response was YES. [2024-06-04 15:02:17,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93578 conditions, 7418 events. 4973/7418 cut-off events. For 3489563/3489563 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 41275 event pairs, 1014 based on Foata normal form. 2/7418 useless extension candidates. Maximal degree in co-relation 93326. Up to 7299 conditions per place. [2024-06-04 15:02:17,827 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 701 selfloop transitions, 35 changer transitions 0/739 dead transitions. [2024-06-04 15:02:17,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 739 transitions, 12012 flow [2024-06-04 15:02:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:02:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:02:17,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-04 15:02:17,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-04 15:02:17,828 INFO L175 Difference]: Start difference. First operand has 542 places, 702 transitions, 9801 flow. Second operand 10 states and 161 transitions. [2024-06-04 15:02:17,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 739 transitions, 12012 flow [2024-06-04 15:02:28,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 739 transitions, 11846 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-04 15:02:28,136 INFO L231 Difference]: Finished difference. Result has 546 places, 711 transitions, 10052 flow [2024-06-04 15:02:28,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9635, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10052, PETRI_PLACES=546, PETRI_TRANSITIONS=711} [2024-06-04 15:02:28,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 503 predicate places. [2024-06-04 15:02:28,137 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 711 transitions, 10052 flow [2024-06-04 15:02:28,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:28,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:28,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:28,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-04 15:02:28,137 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:28,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:28,137 INFO L85 PathProgramCache]: Analyzing trace with hash 319278688, now seen corresponding path program 7 times [2024-06-04 15:02:28,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:28,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45683708] [2024-06-04 15:02:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:28,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:28,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:28,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45683708] [2024-06-04 15:02:28,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45683708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:28,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:28,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:28,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873723537] [2024-06-04 15:02:28,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:28,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:28,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:28,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:29,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:02:29,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 711 transitions, 10052 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:29,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:29,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:02:29,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15