./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix038.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix038.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix038.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix038.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:44:41,539 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:44:41,606 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:44:41,609 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:44:41,609 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:44:41,622 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:44:41,623 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:44:41,623 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:44:41,623 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:44:41,623 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:44:41,624 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:44:41,624 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:44:41,624 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:44:41,625 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:44:41,625 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:44:41,625 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:44:41,625 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:44:41,626 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:44:41,626 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:44:41,626 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:44:41,626 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:44:41,627 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:44:41,627 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:44:41,627 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:44:41,627 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:44:41,628 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:44:41,628 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:44:41,628 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:44:41,628 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:44:41,629 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:44:41,629 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:44:41,629 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:44:41,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:44:41,630 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:44:41,630 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:44:41,630 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:44:41,630 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:44:41,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:44:41,630 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:44:41,631 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:44:41,631 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:44:41,631 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:44:41,631 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:44:41,631 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:44:41,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:44:41,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:44:41,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:44:41,830 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:44:41,830 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:44:41,831 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix038.opt.i [2024-06-03 19:44:42,956 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:44:43,160 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:44:43,161 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix038.opt.i [2024-06-03 19:44:43,187 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/213ba7a30/2fa732d5589f4a8880dc69707c4d8884/FLAG0b75daf9d [2024-06-03 19:44:43,197 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/213ba7a30/2fa732d5589f4a8880dc69707c4d8884 [2024-06-03 19:44:43,199 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:44:43,199 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:44:43,200 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix038.opt.yml/witness.yml [2024-06-03 19:44:43,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:44:43,351 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:44:43,353 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:44:43,353 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:44:43,357 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:44:43,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:44:43" (1/2) ... [2024-06-03 19:44:43,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4684e258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:44:43, skipping insertion in model container [2024-06-03 19:44:43,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:44:43" (1/2) ... [2024-06-03 19:44:43,359 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1ba3e494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:44:43, skipping insertion in model container [2024-06-03 19:44:43,360 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:44:43" (2/2) ... [2024-06-03 19:44:43,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4684e258 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43, skipping insertion in model container [2024-06-03 19:44:43,361 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:44:43" (2/2) ... [2024-06-03 19:44:43,361 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:44:43,448 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:44:43,450 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) [2024-06-03 19:44:43,450 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) [2024-06-03 19:44:43,450 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) [2024-06-03 19:44:43,450 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:44:43,450 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-03 19:44:43,488 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:44:43,779 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:44:43,794 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:44:43,919 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:44:43,960 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:44:43,961 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43 WrapperNode [2024-06-03 19:44:43,961 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:44:43,962 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:44:43,962 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:44:43,963 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:44:43,968 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43" (1/1) ... [2024-06-03 19:44:43,994 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43" (1/1) ... [2024-06-03 19:44:44,025 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 133 [2024-06-03 19:44:44,026 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:44:44,027 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:44:44,027 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:44:44,027 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:44:44,035 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43" (1/1) ... [2024-06-03 19:44:44,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43" (1/1) ... [2024-06-03 19:44:44,049 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43" (1/1) ... [2024-06-03 19:44:44,064 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:44:44,069 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43" (1/1) ... [2024-06-03 19:44:44,070 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43" (1/1) ... [2024-06-03 19:44:44,078 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43" (1/1) ... [2024-06-03 19:44:44,086 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43" (1/1) ... [2024-06-03 19:44:44,088 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43" (1/1) ... [2024-06-03 19:44:44,093 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43" (1/1) ... [2024-06-03 19:44:44,096 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:44:44,099 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:44:44,100 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:44:44,100 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:44:44,100 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43" (1/1) ... [2024-06-03 19:44:44,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:44:44,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:44:44,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 19:44:44,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 19:44:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:44:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:44:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:44:44,173 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:44:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:44:44,174 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:44:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:44:44,174 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:44:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:44:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:44:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:44:44,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:44:44,176 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:44:44,265 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:44:44,267 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:44:44,530 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:44:44,530 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:44:44,653 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:44:44,653 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:44:44,654 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:44:44 BoogieIcfgContainer [2024-06-03 19:44:44,654 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:44:44,655 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:44:44,655 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:44:44,657 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:44:44,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:44:43" (1/4) ... [2024-06-03 19:44:44,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf0f8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:44:44, skipping insertion in model container [2024-06-03 19:44:44,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:44:43" (2/4) ... [2024-06-03 19:44:44,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf0f8d6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:44:44, skipping insertion in model container [2024-06-03 19:44:44,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:44:43" (3/4) ... [2024-06-03 19:44:44,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf0f8d6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:44:44, skipping insertion in model container [2024-06-03 19:44:44,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:44:44" (4/4) ... [2024-06-03 19:44:44,660 INFO L112 eAbstractionObserver]: Analyzing ICFG mix038.opt.i [2024-06-03 19:44:44,672 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:44:44,672 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:44:44,672 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:44:44,715 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:44:44,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-03 19:44:44,783 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-03 19:44:44,783 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:44:44,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:44:44,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-03 19:44:44,788 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-03 19:44:44,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:44:44,799 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;@49450f5a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:44:44,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:44:44,802 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:44:44,802 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:44:44,802 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:44:44,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:44,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:44:44,803 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:44,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:44,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1743886950, now seen corresponding path program 1 times [2024-06-03 19:44:44,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:44,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685804303] [2024-06-03 19:44:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:44,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:45,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:45,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685804303] [2024-06-03 19:44:45,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685804303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:45,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:45,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:44:45,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741662453] [2024-06-03 19:44:45,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:45,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:44:45,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:45,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:44:45,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:44:45,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-03 19:44:45,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:45,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:45,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-03 19:44:45,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:46,067 INFO L124 PetriNetUnfolderBase]: 1116/1802 cut-off events. [2024-06-03 19:44:46,068 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-03 19:44:46,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3555 conditions, 1802 events. 1116/1802 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9051 event pairs, 765 based on Foata normal form. 1/1733 useless extension candidates. Maximal degree in co-relation 3540. Up to 1676 conditions per place. [2024-06-03 19:44:46,082 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 33 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-03 19:44:46,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 177 flow [2024-06-03 19:44:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:44:46,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:44:46,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-03 19:44:46,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-03 19:44:46,093 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 79 transitions. [2024-06-03 19:44:46,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 177 flow [2024-06-03 19:44:46,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:44:46,099 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-03 19:44:46,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-03 19:44:46,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-03 19:44:46,104 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-03 19:44:46,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:46,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:46,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:46,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:44:46,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:46,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:46,105 INFO L85 PathProgramCache]: Analyzing trace with hash -838079111, now seen corresponding path program 1 times [2024-06-03 19:44:46,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:46,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410258029] [2024-06-03 19:44:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:46,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:46,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:46,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410258029] [2024-06-03 19:44:46,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410258029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:46,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:46,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:44:46,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027175019] [2024-06-03 19:44:46,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:46,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:44:46,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:46,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:44:46,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:44:46,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:44:46,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 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) [2024-06-03 19:44:46,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:46,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:44:46,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:46,974 INFO L124 PetriNetUnfolderBase]: 1280/1998 cut-off events. [2024-06-03 19:44:46,974 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2024-06-03 19:44:46,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 1998 events. 1280/1998 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9816 event pairs, 750 based on Foata normal form. 3/1965 useless extension candidates. Maximal degree in co-relation 4506. Up to 1897 conditions per place. [2024-06-03 19:44:46,983 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 41 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-03 19:44:46,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 246 flow [2024-06-03 19:44:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:44:46,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:44:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-03 19:44:46,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-03 19:44:46,985 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 99 transitions. [2024-06-03 19:44:46,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 246 flow [2024-06-03 19:44:46,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:44:46,986 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-03 19:44:46,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-03 19:44:46,987 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-03 19:44:46,987 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-03 19:44:46,987 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) [2024-06-03 19:44:46,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:46,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:46,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:44:46,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:46,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:46,989 INFO L85 PathProgramCache]: Analyzing trace with hash -210647529, now seen corresponding path program 1 times [2024-06-03 19:44:46,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:46,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077587687] [2024-06-03 19:44:46,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:46,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:47,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:47,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077587687] [2024-06-03 19:44:47,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077587687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:47,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:47,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:44:47,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548905072] [2024-06-03 19:44:47,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:47,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:44:47,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:47,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:44:47,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:44:47,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:44:47,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:47,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:47,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:44:47,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:47,807 INFO L124 PetriNetUnfolderBase]: 1302/2077 cut-off events. [2024-06-03 19:44:47,807 INFO L125 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2024-06-03 19:44:47,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5166 conditions, 2077 events. 1302/2077 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10516 event pairs, 470 based on Foata normal form. 7/2073 useless extension candidates. Maximal degree in co-relation 5149. Up to 1800 conditions per place. [2024-06-03 19:44:47,816 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-03 19:44:47,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 79 transitions, 412 flow [2024-06-03 19:44:47,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:44:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:44:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-03 19:44:47,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139534883720931 [2024-06-03 19:44:47,818 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 132 transitions. [2024-06-03 19:44:47,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 79 transitions, 412 flow [2024-06-03 19:44:47,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 398 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 19:44:47,821 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-03 19:44:47,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-03 19:44:47,822 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-03 19:44:47,822 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-03 19:44:47,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:47,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:47,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:47,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:44:47,823 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:47,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:47,823 INFO L85 PathProgramCache]: Analyzing trace with hash -568775082, now seen corresponding path program 1 times [2024-06-03 19:44:47,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:47,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963270516] [2024-06-03 19:44:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:47,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:48,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:48,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963270516] [2024-06-03 19:44:48,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963270516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:48,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:48,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:44:48,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664290036] [2024-06-03 19:44:48,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:48,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:44:48,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:48,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:44:48,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:44:48,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:44:48,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-03 19:44:48,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:48,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:44:48,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:48,825 INFO L124 PetriNetUnfolderBase]: 1384/2221 cut-off events. [2024-06-03 19:44:48,825 INFO L125 PetriNetUnfolderBase]: For 2892/2892 co-relation queries the response was YES. [2024-06-03 19:44:48,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6582 conditions, 2221 events. 1384/2221 cut-off events. For 2892/2892 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11486 event pairs, 321 based on Foata normal form. 26/2234 useless extension candidates. Maximal degree in co-relation 6562. Up to 1764 conditions per place. [2024-06-03 19:44:48,835 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 18 changer transitions 0/89 dead transitions. [2024-06-03 19:44:48,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 529 flow [2024-06-03 19:44:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:44:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:44:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-03 19:44:48,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968992248062015 [2024-06-03 19:44:48,837 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 154 transitions. [2024-06-03 19:44:48,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 529 flow [2024-06-03 19:44:48,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 89 transitions, 521 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-03 19:44:48,840 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 287 flow [2024-06-03 19:44:48,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-03 19:44:48,841 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-03 19:44:48,841 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 287 flow [2024-06-03 19:44:48,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-03 19:44:48,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:48,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:48,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:44:48,842 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:48,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:48,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1208652322, now seen corresponding path program 1 times [2024-06-03 19:44:48,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:48,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554543936] [2024-06-03 19:44:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:48,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:49,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:49,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554543936] [2024-06-03 19:44:49,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554543936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:49,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:49,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:44:49,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983150332] [2024-06-03 19:44:49,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:49,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:44:49,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:49,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:44:49,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:44:49,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:44:49,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:49,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:49,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:44:49,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:49,885 INFO L124 PetriNetUnfolderBase]: 1204/2038 cut-off events. [2024-06-03 19:44:49,885 INFO L125 PetriNetUnfolderBase]: For 3705/3705 co-relation queries the response was YES. [2024-06-03 19:44:49,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6372 conditions, 2038 events. 1204/2038 cut-off events. For 3705/3705 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11049 event pairs, 447 based on Foata normal form. 4/2034 useless extension candidates. Maximal degree in co-relation 6349. Up to 1814 conditions per place. [2024-06-03 19:44:49,895 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2024-06-03 19:44:49,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 431 flow [2024-06-03 19:44:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:44:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:44:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-03 19:44:49,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-03 19:44:49,896 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 287 flow. Second operand 5 states and 106 transitions. [2024-06-03 19:44:49,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 431 flow [2024-06-03 19:44:49,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 387 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:44:49,900 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 267 flow [2024-06-03 19:44:49,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-06-03 19:44:49,900 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-03 19:44:49,901 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 267 flow [2024-06-03 19:44:49,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:49,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:49,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:49,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:44:49,901 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:49,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:49,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1880161743, now seen corresponding path program 1 times [2024-06-03 19:44:49,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:49,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922333934] [2024-06-03 19:44:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:49,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:50,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:50,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922333934] [2024-06-03 19:44:50,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922333934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:50,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:50,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:44:50,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386202117] [2024-06-03 19:44:50,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:50,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:44:50,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:50,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:44:50,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:44:50,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:44:50,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-03 19:44:50,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:50,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:44:50,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:51,089 INFO L124 PetriNetUnfolderBase]: 1386/2223 cut-off events. [2024-06-03 19:44:51,090 INFO L125 PetriNetUnfolderBase]: For 4743/4743 co-relation queries the response was YES. [2024-06-03 19:44:51,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7079 conditions, 2223 events. 1386/2223 cut-off events. For 4743/4743 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11474 event pairs, 459 based on Foata normal form. 8/2217 useless extension candidates. Maximal degree in co-relation 7054. Up to 1943 conditions per place. [2024-06-03 19:44:51,102 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 19 changer transitions 0/78 dead transitions. [2024-06-03 19:44:51,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 509 flow [2024-06-03 19:44:51,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:44:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:44:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-03 19:44:51,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077519379844961 [2024-06-03 19:44:51,103 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 267 flow. Second operand 6 states and 131 transitions. [2024-06-03 19:44:51,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 509 flow [2024-06-03 19:44:51,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 78 transitions, 487 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 19:44:51,108 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 317 flow [2024-06-03 19:44:51,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=317, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-03 19:44:51,109 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-03 19:44:51,109 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 317 flow [2024-06-03 19:44:51,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-03 19:44:51,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:51,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:51,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:44:51,110 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:51,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:51,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1873611753, now seen corresponding path program 2 times [2024-06-03 19:44:51,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:51,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49844222] [2024-06-03 19:44:51,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:51,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:51,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:51,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49844222] [2024-06-03 19:44:51,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49844222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:51,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:51,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:44:51,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467346995] [2024-06-03 19:44:51,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:51,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:44:51,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:51,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:44:51,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:44:51,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:44:51,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 317 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-03 19:44:51,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:51,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:44:51,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:52,299 INFO L124 PetriNetUnfolderBase]: 1354/2152 cut-off events. [2024-06-03 19:44:52,299 INFO L125 PetriNetUnfolderBase]: For 5808/5808 co-relation queries the response was YES. [2024-06-03 19:44:52,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7154 conditions, 2152 events. 1354/2152 cut-off events. For 5808/5808 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10870 event pairs, 469 based on Foata normal form. 4/2141 useless extension candidates. Maximal degree in co-relation 7129. Up to 1895 conditions per place. [2024-06-03 19:44:52,312 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 47 selfloop transitions, 20 changer transitions 0/73 dead transitions. [2024-06-03 19:44:52,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 495 flow [2024-06-03 19:44:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:44:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:44:52,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-03 19:44:52,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49224806201550386 [2024-06-03 19:44:52,314 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 317 flow. Second operand 6 states and 127 transitions. [2024-06-03 19:44:52,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 495 flow [2024-06-03 19:44:52,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 73 transitions, 466 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:44:52,318 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 336 flow [2024-06-03 19:44:52,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2024-06-03 19:44:52,319 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-03 19:44:52,319 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 336 flow [2024-06-03 19:44:52,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-03 19:44:52,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:52,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:52,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:44:52,320 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:52,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:52,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1666816423, now seen corresponding path program 1 times [2024-06-03 19:44:52,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:52,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101265022] [2024-06-03 19:44:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:52,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:53,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:53,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101265022] [2024-06-03 19:44:53,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101265022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:53,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:53,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:53,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964269716] [2024-06-03 19:44:53,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:53,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:53,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:53,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:53,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:53,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:44:53,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 336 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:53,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:53,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:44:53,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:54,036 INFO L124 PetriNetUnfolderBase]: 1176/1973 cut-off events. [2024-06-03 19:44:54,037 INFO L125 PetriNetUnfolderBase]: For 6120/6120 co-relation queries the response was YES. [2024-06-03 19:44:54,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6562 conditions, 1973 events. 1176/1973 cut-off events. For 6120/6120 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10414 event pairs, 406 based on Foata normal form. 4/1963 useless extension candidates. Maximal degree in co-relation 6536. Up to 1742 conditions per place. [2024-06-03 19:44:54,048 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2024-06-03 19:44:54,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 569 flow [2024-06-03 19:44:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 19:44:54,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-03 19:44:54,052 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 336 flow. Second operand 7 states and 143 transitions. [2024-06-03 19:44:54,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 569 flow [2024-06-03 19:44:54,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 499 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:54,058 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 346 flow [2024-06-03 19:44:54,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-06-03 19:44:54,059 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-03 19:44:54,060 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 346 flow [2024-06-03 19:44:54,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:54,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:54,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:54,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:44:54,061 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:54,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:54,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1850510522, now seen corresponding path program 1 times [2024-06-03 19:44:54,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:54,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550701393] [2024-06-03 19:44:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:54,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:54,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:54,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550701393] [2024-06-03 19:44:54,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550701393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:54,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:54,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:44:54,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836512822] [2024-06-03 19:44:54,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:54,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:44:54,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:54,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:44:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:44:54,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:44:54,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:54,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:54,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:44:54,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:55,014 INFO L124 PetriNetUnfolderBase]: 1173/1969 cut-off events. [2024-06-03 19:44:55,014 INFO L125 PetriNetUnfolderBase]: For 6996/6996 co-relation queries the response was YES. [2024-06-03 19:44:55,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6810 conditions, 1969 events. 1173/1969 cut-off events. For 6996/6996 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10372 event pairs, 420 based on Foata normal form. 1/1956 useless extension candidates. Maximal degree in co-relation 6782. Up to 1771 conditions per place. [2024-06-03 19:44:55,023 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 56 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2024-06-03 19:44:55,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 514 flow [2024-06-03 19:44:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:44:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:44:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-03 19:44:55,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-03 19:44:55,024 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 346 flow. Second operand 5 states and 101 transitions. [2024-06-03 19:44:55,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 514 flow [2024-06-03 19:44:55,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 71 transitions, 481 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:44:55,029 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 361 flow [2024-06-03 19:44:55,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-03 19:44:55,030 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-03 19:44:55,030 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 361 flow [2024-06-03 19:44:55,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:55,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:55,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:55,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:44:55,031 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:55,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:55,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1564318406, now seen corresponding path program 1 times [2024-06-03 19:44:55,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:55,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462296596] [2024-06-03 19:44:55,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:55,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:55,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:55,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462296596] [2024-06-03 19:44:55,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462296596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:55,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:55,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:44:55,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753289930] [2024-06-03 19:44:55,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:55,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:44:55,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:55,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:44:55,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:44:55,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:44:55,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 361 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:55,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:55,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:44:55,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:56,138 INFO L124 PetriNetUnfolderBase]: 1340/2155 cut-off events. [2024-06-03 19:44:56,138 INFO L125 PetriNetUnfolderBase]: For 9912/9912 co-relation queries the response was YES. [2024-06-03 19:44:56,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7955 conditions, 2155 events. 1340/2155 cut-off events. For 9912/9912 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10986 event pairs, 492 based on Foata normal form. 1/2155 useless extension candidates. Maximal degree in co-relation 7926. Up to 2009 conditions per place. [2024-06-03 19:44:56,149 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 58 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-03 19:44:56,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 75 transitions, 545 flow [2024-06-03 19:44:56,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:44:56,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:44:56,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-03 19:44:56,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:44:56,151 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 361 flow. Second operand 6 states and 112 transitions. [2024-06-03 19:44:56,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 75 transitions, 545 flow [2024-06-03 19:44:56,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 75 transitions, 519 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:44:56,156 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 393 flow [2024-06-03 19:44:56,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-06-03 19:44:56,157 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-03 19:44:56,157 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 393 flow [2024-06-03 19:44:56,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:56,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:56,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:56,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:44:56,158 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:56,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:56,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1432728446, now seen corresponding path program 1 times [2024-06-03 19:44:56,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:56,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426935374] [2024-06-03 19:44:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:56,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:56,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:56,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426935374] [2024-06-03 19:44:56,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426935374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:56,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:56,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:56,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767086687] [2024-06-03 19:44:56,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:56,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:56,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:56,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:56,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:56,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:44:56,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:56,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:56,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:44:56,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:57,480 INFO L124 PetriNetUnfolderBase]: 1543/2447 cut-off events. [2024-06-03 19:44:57,481 INFO L125 PetriNetUnfolderBase]: For 16170/16172 co-relation queries the response was YES. [2024-06-03 19:44:57,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9793 conditions, 2447 events. 1543/2447 cut-off events. For 16170/16172 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12646 event pairs, 357 based on Foata normal form. 16/2457 useless extension candidates. Maximal degree in co-relation 9763. Up to 1728 conditions per place. [2024-06-03 19:44:57,493 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 74 selfloop transitions, 22 changer transitions 0/103 dead transitions. [2024-06-03 19:44:57,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 103 transitions, 743 flow [2024-06-03 19:44:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:57,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 19:44:57,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-03 19:44:57,495 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 393 flow. Second operand 7 states and 154 transitions. [2024-06-03 19:44:57,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 103 transitions, 743 flow [2024-06-03 19:44:57,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 103 transitions, 707 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:44:57,502 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 433 flow [2024-06-03 19:44:57,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=433, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2024-06-03 19:44:57,502 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-03 19:44:57,502 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 433 flow [2024-06-03 19:44:57,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:57,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:57,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:57,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:44:57,503 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:57,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:57,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1435585406, now seen corresponding path program 2 times [2024-06-03 19:44:57,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:57,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186344560] [2024-06-03 19:44:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:57,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:58,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:58,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186344560] [2024-06-03 19:44:58,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186344560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:58,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:58,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:58,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829330163] [2024-06-03 19:44:58,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:58,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:58,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:58,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:58,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:58,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:44:58,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 433 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:58,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:58,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:44:58,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:58,989 INFO L124 PetriNetUnfolderBase]: 1581/2535 cut-off events. [2024-06-03 19:44:58,990 INFO L125 PetriNetUnfolderBase]: For 19100/19102 co-relation queries the response was YES. [2024-06-03 19:44:58,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10383 conditions, 2535 events. 1581/2535 cut-off events. For 19100/19102 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13379 event pairs, 510 based on Foata normal form. 24/2557 useless extension candidates. Maximal degree in co-relation 10352. Up to 2107 conditions per place. [2024-06-03 19:44:59,002 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 69 selfloop transitions, 23 changer transitions 0/99 dead transitions. [2024-06-03 19:44:59,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 717 flow [2024-06-03 19:44:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:59,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-03 19:44:59,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016611295681063 [2024-06-03 19:44:59,004 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 433 flow. Second operand 7 states and 151 transitions. [2024-06-03 19:44:59,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 717 flow [2024-06-03 19:44:59,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 687 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:44:59,015 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 481 flow [2024-06-03 19:44:59,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=481, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2024-06-03 19:44:59,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-03 19:44:59,016 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 481 flow [2024-06-03 19:44:59,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:59,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:59,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:59,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:44:59,017 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:59,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:59,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1260671089, now seen corresponding path program 1 times [2024-06-03 19:44:59,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:59,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43168605] [2024-06-03 19:44:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:59,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:59,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:59,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43168605] [2024-06-03 19:44:59,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43168605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:59,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:59,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:44:59,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902682534] [2024-06-03 19:44:59,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:59,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:44:59,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:44:59,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:44:59,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:44:59,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 481 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:59,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:59,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:44:59,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:00,267 INFO L124 PetriNetUnfolderBase]: 1616/2587 cut-off events. [2024-06-03 19:45:00,267 INFO L125 PetriNetUnfolderBase]: For 20350/20350 co-relation queries the response was YES. [2024-06-03 19:45:00,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10974 conditions, 2587 events. 1616/2587 cut-off events. For 20350/20350 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13591 event pairs, 587 based on Foata normal form. 1/2587 useless extension candidates. Maximal degree in co-relation 10941. Up to 2404 conditions per place. [2024-06-03 19:45:00,279 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 70 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2024-06-03 19:45:00,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 88 transitions, 707 flow [2024-06-03 19:45:00,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:45:00,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:45:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-03 19:45:00,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-03 19:45:00,280 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 481 flow. Second operand 6 states and 118 transitions. [2024-06-03 19:45:00,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 88 transitions, 707 flow [2024-06-03 19:45:00,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 88 transitions, 653 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:00,294 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 487 flow [2024-06-03 19:45:00,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=487, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2024-06-03 19:45:00,295 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-03 19:45:00,295 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 487 flow [2024-06-03 19:45:00,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:00,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:00,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:00,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:45:00,296 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:00,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1165069012, now seen corresponding path program 1 times [2024-06-03 19:45:00,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:00,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068705919] [2024-06-03 19:45:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:00,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:01,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:01,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068705919] [2024-06-03 19:45:01,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068705919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:01,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:01,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:01,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884317039] [2024-06-03 19:45:01,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:01,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:01,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:01,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:01,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:01,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:01,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 487 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:01,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:01,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:01,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:02,126 INFO L124 PetriNetUnfolderBase]: 1644/2613 cut-off events. [2024-06-03 19:45:02,127 INFO L125 PetriNetUnfolderBase]: For 23360/23360 co-relation queries the response was YES. [2024-06-03 19:45:02,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11439 conditions, 2613 events. 1644/2613 cut-off events. For 23360/23360 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13661 event pairs, 546 based on Foata normal form. 4/2613 useless extension candidates. Maximal degree in co-relation 11405. Up to 2298 conditions per place. [2024-06-03 19:45:02,138 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 70 selfloop transitions, 28 changer transitions 0/105 dead transitions. [2024-06-03 19:45:02,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 105 transitions, 802 flow [2024-06-03 19:45:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-03 19:45:02,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-03 19:45:02,140 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 487 flow. Second operand 8 states and 163 transitions. [2024-06-03 19:45:02,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 105 transitions, 802 flow [2024-06-03 19:45:02,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 105 transitions, 764 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:02,149 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 575 flow [2024-06-03 19:45:02,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=575, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2024-06-03 19:45:02,150 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-03 19:45:02,150 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 575 flow [2024-06-03 19:45:02,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:02,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:02,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:02,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:45:02,151 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:02,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:02,152 INFO L85 PathProgramCache]: Analyzing trace with hash 211935514, now seen corresponding path program 2 times [2024-06-03 19:45:02,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:02,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707225895] [2024-06-03 19:45:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:02,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:03,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:03,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707225895] [2024-06-03 19:45:03,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707225895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:03,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:03,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:03,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733001283] [2024-06-03 19:45:03,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:03,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:03,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:03,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:03,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:03,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:03,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 575 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:03,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:03,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:03,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:03,838 INFO L124 PetriNetUnfolderBase]: 1636/2604 cut-off events. [2024-06-03 19:45:03,839 INFO L125 PetriNetUnfolderBase]: For 26832/26832 co-relation queries the response was YES. [2024-06-03 19:45:03,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11965 conditions, 2604 events. 1636/2604 cut-off events. For 26832/26832 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13585 event pairs, 544 based on Foata normal form. 4/2604 useless extension candidates. Maximal degree in co-relation 11929. Up to 2286 conditions per place. [2024-06-03 19:45:03,855 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 34 changer transitions 0/112 dead transitions. [2024-06-03 19:45:03,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 112 transitions, 936 flow [2024-06-03 19:45:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-03 19:45:03,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-03 19:45:03,856 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 575 flow. Second operand 8 states and 163 transitions. [2024-06-03 19:45:03,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 112 transitions, 936 flow [2024-06-03 19:45:03,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 853 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:03,872 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 670 flow [2024-06-03 19:45:03,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=670, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-06-03 19:45:03,873 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-03 19:45:03,873 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 670 flow [2024-06-03 19:45:03,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:03,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:03,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:03,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:45:03,874 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:03,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:03,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1723195528, now seen corresponding path program 3 times [2024-06-03 19:45:03,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:03,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110713288] [2024-06-03 19:45:03,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:03,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:04,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:04,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110713288] [2024-06-03 19:45:04,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110713288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:04,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:04,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:04,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240075231] [2024-06-03 19:45:04,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:04,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:04,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:04,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:04,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:04,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:04,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 670 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:04,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:04,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:04,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:05,469 INFO L124 PetriNetUnfolderBase]: 1669/2670 cut-off events. [2024-06-03 19:45:05,470 INFO L125 PetriNetUnfolderBase]: For 30141/30141 co-relation queries the response was YES. [2024-06-03 19:45:05,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12526 conditions, 2670 events. 1669/2670 cut-off events. For 30141/30141 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14076 event pairs, 449 based on Foata normal form. 4/2670 useless extension candidates. Maximal degree in co-relation 12488. Up to 2176 conditions per place. [2024-06-03 19:45:05,483 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 41 changer transitions 0/119 dead transitions. [2024-06-03 19:45:05,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 119 transitions, 1010 flow [2024-06-03 19:45:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 19:45:05,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48546511627906974 [2024-06-03 19:45:05,484 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 670 flow. Second operand 8 states and 167 transitions. [2024-06-03 19:45:05,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 119 transitions, 1010 flow [2024-06-03 19:45:05,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 946 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-03 19:45:05,501 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 752 flow [2024-06-03 19:45:05,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=752, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2024-06-03 19:45:05,501 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-03 19:45:05,501 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 752 flow [2024-06-03 19:45:05,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:05,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:05,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:05,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:45:05,502 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:05,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:05,502 INFO L85 PathProgramCache]: Analyzing trace with hash -227985551, now seen corresponding path program 2 times [2024-06-03 19:45:05,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:05,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022604247] [2024-06-03 19:45:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:05,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:06,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:06,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022604247] [2024-06-03 19:45:06,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022604247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:06,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:06,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:45:06,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750240581] [2024-06-03 19:45:06,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:06,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:45:06,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:06,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:45:06,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:45:06,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:06,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 752 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:06,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:06,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:06,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:06,620 INFO L124 PetriNetUnfolderBase]: 1666/2685 cut-off events. [2024-06-03 19:45:06,620 INFO L125 PetriNetUnfolderBase]: For 33150/33158 co-relation queries the response was YES. [2024-06-03 19:45:06,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12823 conditions, 2685 events. 1666/2685 cut-off events. For 33150/33158 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14292 event pairs, 548 based on Foata normal form. 7/2690 useless extension candidates. Maximal degree in co-relation 12783. Up to 2484 conditions per place. [2024-06-03 19:45:06,637 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 79 selfloop transitions, 16 changer transitions 0/102 dead transitions. [2024-06-03 19:45:06,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 102 transitions, 1002 flow [2024-06-03 19:45:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:45:06,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:45:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-03 19:45:06,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:45:06,639 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 752 flow. Second operand 6 states and 114 transitions. [2024-06-03 19:45:06,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 102 transitions, 1002 flow [2024-06-03 19:45:06,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 102 transitions, 912 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:06,658 INFO L231 Difference]: Finished difference. Result has 93 places, 93 transitions, 744 flow [2024-06-03 19:45:06,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=744, PETRI_PLACES=93, PETRI_TRANSITIONS=93} [2024-06-03 19:45:06,659 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-03 19:45:06,659 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 93 transitions, 744 flow [2024-06-03 19:45:06,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:06,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:06,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:06,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:45:06,660 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:06,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:06,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1254951217, now seen corresponding path program 1 times [2024-06-03 19:45:06,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:06,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588591107] [2024-06-03 19:45:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:06,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:07,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:07,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588591107] [2024-06-03 19:45:07,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588591107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:07,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:07,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:45:07,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180939961] [2024-06-03 19:45:07,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:07,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:45:07,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:07,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:45:07,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:45:07,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:45:07,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 93 transitions, 744 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:07,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:07,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:45:07,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:07,807 INFO L124 PetriNetUnfolderBase]: 1506/2504 cut-off events. [2024-06-03 19:45:07,808 INFO L125 PetriNetUnfolderBase]: For 31762/31762 co-relation queries the response was YES. [2024-06-03 19:45:07,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11861 conditions, 2504 events. 1506/2504 cut-off events. For 31762/31762 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13700 event pairs, 473 based on Foata normal form. 2/2505 useless extension candidates. Maximal degree in co-relation 11820. Up to 2262 conditions per place. [2024-06-03 19:45:07,819 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 90 selfloop transitions, 11 changer transitions 0/109 dead transitions. [2024-06-03 19:45:07,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 109 transitions, 1006 flow [2024-06-03 19:45:07,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:45:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:45:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-03 19:45:07,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-03 19:45:07,821 INFO L175 Difference]: Start difference. First operand has 93 places, 93 transitions, 744 flow. Second operand 6 states and 121 transitions. [2024-06-03 19:45:07,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 109 transitions, 1006 flow [2024-06-03 19:45:07,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 109 transitions, 946 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:07,839 INFO L231 Difference]: Finished difference. Result has 95 places, 96 transitions, 742 flow [2024-06-03 19:45:07,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=89, 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=742, PETRI_PLACES=95, PETRI_TRANSITIONS=96} [2024-06-03 19:45:07,839 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-03 19:45:07,839 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 96 transitions, 742 flow [2024-06-03 19:45:07,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:07,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:07,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:07,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:45:07,840 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:07,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash -224128987, now seen corresponding path program 2 times [2024-06-03 19:45:07,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:07,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240789472] [2024-06-03 19:45:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:07,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:08,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:08,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240789472] [2024-06-03 19:45:08,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240789472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:08,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:08,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:45:08,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035820698] [2024-06-03 19:45:08,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:08,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:45:08,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:08,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:45:08,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:45:08,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:45:08,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 96 transitions, 742 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:08,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:08,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:45:08,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:08,954 INFO L124 PetriNetUnfolderBase]: 1508/2510 cut-off events. [2024-06-03 19:45:08,955 INFO L125 PetriNetUnfolderBase]: For 34798/34800 co-relation queries the response was YES. [2024-06-03 19:45:08,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12274 conditions, 2510 events. 1508/2510 cut-off events. For 34798/34800 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13784 event pairs, 477 based on Foata normal form. 4/2513 useless extension candidates. Maximal degree in co-relation 12232. Up to 2256 conditions per place. [2024-06-03 19:45:08,969 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 86 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2024-06-03 19:45:08,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 110 transitions, 1010 flow [2024-06-03 19:45:08,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:45:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:45:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-03 19:45:08,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-03 19:45:08,987 INFO L175 Difference]: Start difference. First operand has 95 places, 96 transitions, 742 flow. Second operand 6 states and 121 transitions. [2024-06-03 19:45:08,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 110 transitions, 1010 flow [2024-06-03 19:45:09,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 110 transitions, 974 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:09,008 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 780 flow [2024-06-03 19:45:09,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=780, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2024-06-03 19:45:09,009 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-03 19:45:09,009 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 780 flow [2024-06-03 19:45:09,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:09,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:09,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:09,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:45:09,010 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:09,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash -224121051, now seen corresponding path program 1 times [2024-06-03 19:45:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:09,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376172312] [2024-06-03 19:45:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:09,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:09,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:09,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376172312] [2024-06-03 19:45:09,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376172312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:09,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:09,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:09,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249586719] [2024-06-03 19:45:09,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:09,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:09,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:09,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:09,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:09,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:09,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 780 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:09,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:09,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:09,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:10,224 INFO L124 PetriNetUnfolderBase]: 1590/2590 cut-off events. [2024-06-03 19:45:10,224 INFO L125 PetriNetUnfolderBase]: For 37624/37624 co-relation queries the response was YES. [2024-06-03 19:45:10,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13030 conditions, 2590 events. 1590/2590 cut-off events. For 37624/37624 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13862 event pairs, 500 based on Foata normal form. 1/2590 useless extension candidates. Maximal degree in co-relation 12987. Up to 2426 conditions per place. [2024-06-03 19:45:10,243 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 92 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2024-06-03 19:45:10,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 112 transitions, 1052 flow [2024-06-03 19:45:10,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:10,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 19:45:10,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-03 19:45:10,246 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 780 flow. Second operand 7 states and 127 transitions. [2024-06-03 19:45:10,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 112 transitions, 1052 flow [2024-06-03 19:45:10,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 112 transitions, 1000 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:10,275 INFO L231 Difference]: Finished difference. Result has 100 places, 102 transitions, 804 flow [2024-06-03 19:45:10,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=804, PETRI_PLACES=100, PETRI_TRANSITIONS=102} [2024-06-03 19:45:10,276 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-03 19:45:10,276 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 102 transitions, 804 flow [2024-06-03 19:45:10,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:10,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:10,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:10,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:45:10,277 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:10,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:10,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1629777369, now seen corresponding path program 1 times [2024-06-03 19:45:10,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:10,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139732045] [2024-06-03 19:45:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:10,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:11,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:11,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139732045] [2024-06-03 19:45:11,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139732045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:11,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:11,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:11,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686109851] [2024-06-03 19:45:11,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:11,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:11,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:11,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:11,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:11,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:11,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 102 transitions, 804 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:11,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:11,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:11,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:11,584 INFO L124 PetriNetUnfolderBase]: 1687/2722 cut-off events. [2024-06-03 19:45:11,584 INFO L125 PetriNetUnfolderBase]: For 48380/48382 co-relation queries the response was YES. [2024-06-03 19:45:11,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14456 conditions, 2722 events. 1687/2722 cut-off events. For 48380/48382 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14549 event pairs, 536 based on Foata normal form. 5/2726 useless extension candidates. Maximal degree in co-relation 14412. Up to 2449 conditions per place. [2024-06-03 19:45:11,598 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 101 selfloop transitions, 24 changer transitions 0/132 dead transitions. [2024-06-03 19:45:11,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 132 transitions, 1180 flow [2024-06-03 19:45:11,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:11,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-03 19:45:11,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48172757475083056 [2024-06-03 19:45:11,600 INFO L175 Difference]: Start difference. First operand has 100 places, 102 transitions, 804 flow. Second operand 7 states and 145 transitions. [2024-06-03 19:45:11,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 132 transitions, 1180 flow [2024-06-03 19:45:11,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 132 transitions, 1126 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:11,622 INFO L231 Difference]: Finished difference. Result has 103 places, 109 transitions, 890 flow [2024-06-03 19:45:11,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=890, PETRI_PLACES=103, PETRI_TRANSITIONS=109} [2024-06-03 19:45:11,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-03 19:45:11,622 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 109 transitions, 890 flow [2024-06-03 19:45:11,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:11,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:11,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:11,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:45:11,623 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:11,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:11,623 INFO L85 PathProgramCache]: Analyzing trace with hash 838259714, now seen corresponding path program 1 times [2024-06-03 19:45:11,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:11,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313198494] [2024-06-03 19:45:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:11,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:12,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:12,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313198494] [2024-06-03 19:45:12,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313198494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:12,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:12,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:12,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115077307] [2024-06-03 19:45:12,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:12,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:12,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:12,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:12,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:12,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:12,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 109 transitions, 890 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:12,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:12,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:12,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:13,202 INFO L124 PetriNetUnfolderBase]: 1797/2921 cut-off events. [2024-06-03 19:45:13,202 INFO L125 PetriNetUnfolderBase]: For 55294/55296 co-relation queries the response was YES. [2024-06-03 19:45:13,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15970 conditions, 2921 events. 1797/2921 cut-off events. For 55294/55296 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16069 event pairs, 546 based on Foata normal form. 12/2931 useless extension candidates. Maximal degree in co-relation 15924. Up to 2271 conditions per place. [2024-06-03 19:45:13,221 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 103 selfloop transitions, 37 changer transitions 0/147 dead transitions. [2024-06-03 19:45:13,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 147 transitions, 1320 flow [2024-06-03 19:45:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:13,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:13,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 19:45:13,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-03 19:45:13,223 INFO L175 Difference]: Start difference. First operand has 103 places, 109 transitions, 890 flow. Second operand 8 states and 168 transitions. [2024-06-03 19:45:13,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 147 transitions, 1320 flow [2024-06-03 19:45:13,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 147 transitions, 1250 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:13,254 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 969 flow [2024-06-03 19:45:13,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=969, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2024-06-03 19:45:13,255 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-03 19:45:13,255 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 969 flow [2024-06-03 19:45:13,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:13,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:13,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:13,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:45:13,255 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)] === [2024-06-03 19:45:13,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:13,256 INFO L85 PathProgramCache]: Analyzing trace with hash -426097157, now seen corresponding path program 1 times [2024-06-03 19:45:13,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:13,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932373320] [2024-06-03 19:45:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:13,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:13,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:13,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932373320] [2024-06-03 19:45:13,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932373320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:13,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:13,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:13,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679894087] [2024-06-03 19:45:13,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:13,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:13,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:13,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:13,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:13,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:13,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 969 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:13,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:13,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:13,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:14,429 INFO L124 PetriNetUnfolderBase]: 1887/3013 cut-off events. [2024-06-03 19:45:14,430 INFO L125 PetriNetUnfolderBase]: For 58345/58345 co-relation queries the response was YES. [2024-06-03 19:45:14,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16789 conditions, 3013 events. 1887/3013 cut-off events. For 58345/58345 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16241 event pairs, 584 based on Foata normal form. 1/3013 useless extension candidates. Maximal degree in co-relation 16742. Up to 2868 conditions per place. [2024-06-03 19:45:14,514 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 114 selfloop transitions, 14 changer transitions 0/133 dead transitions. [2024-06-03 19:45:14,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 133 transitions, 1309 flow [2024-06-03 19:45:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 19:45:14,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-03 19:45:14,521 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 969 flow. Second operand 7 states and 127 transitions. [2024-06-03 19:45:14,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 133 transitions, 1309 flow [2024-06-03 19:45:14,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 133 transitions, 1258 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 19:45:14,553 INFO L231 Difference]: Finished difference. Result has 112 places, 117 transitions, 1002 flow [2024-06-03 19:45:14,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1002, PETRI_PLACES=112, PETRI_TRANSITIONS=117} [2024-06-03 19:45:14,554 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-03 19:45:14,554 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 117 transitions, 1002 flow [2024-06-03 19:45:14,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:14,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:14,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:14,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:45:14,555 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:14,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:14,555 INFO L85 PathProgramCache]: Analyzing trace with hash -83798939, now seen corresponding path program 2 times [2024-06-03 19:45:14,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:14,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593460207] [2024-06-03 19:45:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:14,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:15,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:15,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593460207] [2024-06-03 19:45:15,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593460207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:15,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:15,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:15,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713527380] [2024-06-03 19:45:15,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:15,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:15,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:15,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:15,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:15,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:15,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 117 transitions, 1002 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:15,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:15,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:15,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:15,806 INFO L124 PetriNetUnfolderBase]: 1863/3024 cut-off events. [2024-06-03 19:45:15,807 INFO L125 PetriNetUnfolderBase]: For 65028/65030 co-relation queries the response was YES. [2024-06-03 19:45:15,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17292 conditions, 3024 events. 1863/3024 cut-off events. For 65028/65030 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16749 event pairs, 561 based on Foata normal form. 5/3028 useless extension candidates. Maximal degree in co-relation 17244. Up to 2677 conditions per place. [2024-06-03 19:45:15,827 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 107 selfloop transitions, 29 changer transitions 0/144 dead transitions. [2024-06-03 19:45:15,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 144 transitions, 1482 flow [2024-06-03 19:45:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:15,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-03 19:45:15,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-03 19:45:15,829 INFO L175 Difference]: Start difference. First operand has 112 places, 117 transitions, 1002 flow. Second operand 7 states and 142 transitions. [2024-06-03 19:45:15,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 144 transitions, 1482 flow [2024-06-03 19:45:15,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 144 transitions, 1420 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:15,866 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 1134 flow [2024-06-03 19:45:15,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1134, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2024-06-03 19:45:15,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-03 19:45:15,866 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 1134 flow [2024-06-03 19:45:15,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:15,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:15,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:15,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:45:15,867 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:15,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:15,867 INFO L85 PathProgramCache]: Analyzing trace with hash 26860728, now seen corresponding path program 2 times [2024-06-03 19:45:15,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:15,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794547100] [2024-06-03 19:45:15,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:15,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:16,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:16,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794547100] [2024-06-03 19:45:16,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794547100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:16,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:16,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:16,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447400801] [2024-06-03 19:45:16,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:16,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:16,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:16,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:16,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:16,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:16,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 1134 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:16,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:16,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:16,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:17,350 INFO L124 PetriNetUnfolderBase]: 1843/2991 cut-off events. [2024-06-03 19:45:17,350 INFO L125 PetriNetUnfolderBase]: For 72190/72192 co-relation queries the response was YES. [2024-06-03 19:45:17,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17812 conditions, 2991 events. 1843/2991 cut-off events. For 72190/72192 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16497 event pairs, 347 based on Foata normal form. 12/3001 useless extension candidates. Maximal degree in co-relation 17762. Up to 1909 conditions per place. [2024-06-03 19:45:17,371 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 107 selfloop transitions, 40 changer transitions 0/155 dead transitions. [2024-06-03 19:45:17,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 155 transitions, 1528 flow [2024-06-03 19:45:17,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-03 19:45:17,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016611295681063 [2024-06-03 19:45:17,373 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 1134 flow. Second operand 7 states and 151 transitions. [2024-06-03 19:45:17,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 155 transitions, 1528 flow [2024-06-03 19:45:17,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 155 transitions, 1451 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 19:45:17,413 INFO L231 Difference]: Finished difference. Result has 119 places, 125 transitions, 1146 flow [2024-06-03 19:45:17,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1146, PETRI_PLACES=119, PETRI_TRANSITIONS=125} [2024-06-03 19:45:17,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-03 19:45:17,414 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 125 transitions, 1146 flow [2024-06-03 19:45:17,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:17,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:17,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:17,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:45:17,415 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:17,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:17,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1540079290, now seen corresponding path program 3 times [2024-06-03 19:45:17,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:17,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811345632] [2024-06-03 19:45:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:17,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:18,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:18,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811345632] [2024-06-03 19:45:18,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811345632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:18,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:18,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:18,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317148035] [2024-06-03 19:45:18,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:18,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:18,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:18,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:18,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:18,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:18,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 125 transitions, 1146 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:18,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:18,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:18,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:18,851 INFO L124 PetriNetUnfolderBase]: 1823/2960 cut-off events. [2024-06-03 19:45:18,851 INFO L125 PetriNetUnfolderBase]: For 74636/74638 co-relation queries the response was YES. [2024-06-03 19:45:18,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17771 conditions, 2960 events. 1823/2960 cut-off events. For 74636/74638 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16364 event pairs, 310 based on Foata normal form. 12/2967 useless extension candidates. Maximal degree in co-relation 17719. Up to 1767 conditions per place. [2024-06-03 19:45:18,870 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 102 selfloop transitions, 39 changer transitions 0/149 dead transitions. [2024-06-03 19:45:18,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 149 transitions, 1482 flow [2024-06-03 19:45:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:18,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 19:45:18,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-03 19:45:18,872 INFO L175 Difference]: Start difference. First operand has 119 places, 125 transitions, 1146 flow. Second operand 7 states and 143 transitions. [2024-06-03 19:45:18,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 149 transitions, 1482 flow [2024-06-03 19:45:18,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 149 transitions, 1378 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:18,914 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 1092 flow [2024-06-03 19:45:18,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1092, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2024-06-03 19:45:18,915 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-03 19:45:18,915 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 1092 flow [2024-06-03 19:45:18,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:18,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:18,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:18,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:45:18,916 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:18,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:18,916 INFO L85 PathProgramCache]: Analyzing trace with hash -71834117, now seen corresponding path program 2 times [2024-06-03 19:45:18,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:18,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788720257] [2024-06-03 19:45:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:18,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:19,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:19,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788720257] [2024-06-03 19:45:19,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788720257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:19,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:19,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:19,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670563227] [2024-06-03 19:45:19,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:19,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:19,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:19,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:19,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:19,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:19,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 1092 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:19,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:19,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:19,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:20,116 INFO L124 PetriNetUnfolderBase]: 1903/3043 cut-off events. [2024-06-03 19:45:20,116 INFO L125 PetriNetUnfolderBase]: For 71231/71241 co-relation queries the response was YES. [2024-06-03 19:45:20,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18094 conditions, 3043 events. 1903/3043 cut-off events. For 71231/71241 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16510 event pairs, 569 based on Foata normal form. 9/3050 useless extension candidates. Maximal degree in co-relation 18041. Up to 2866 conditions per place. [2024-06-03 19:45:20,135 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 110 selfloop transitions, 26 changer transitions 0/141 dead transitions. [2024-06-03 19:45:20,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 141 transitions, 1548 flow [2024-06-03 19:45:20,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-03 19:45:20,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-03 19:45:20,137 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 1092 flow. Second operand 7 states and 125 transitions. [2024-06-03 19:45:20,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 141 transitions, 1548 flow [2024-06-03 19:45:20,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 141 transitions, 1437 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:20,168 INFO L231 Difference]: Finished difference. Result has 120 places, 130 transitions, 1153 flow [2024-06-03 19:45:20,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1153, PETRI_PLACES=120, PETRI_TRANSITIONS=130} [2024-06-03 19:45:20,169 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-03 19:45:20,169 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 130 transitions, 1153 flow [2024-06-03 19:45:20,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:20,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:20,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:20,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:45:20,170 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:20,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:20,170 INFO L85 PathProgramCache]: Analyzing trace with hash -71834489, now seen corresponding path program 3 times [2024-06-03 19:45:20,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:20,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646209218] [2024-06-03 19:45:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:20,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:20,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:20,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646209218] [2024-06-03 19:45:20,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646209218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:20,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:20,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:20,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861552388] [2024-06-03 19:45:20,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:20,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:20,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:20,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:20,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:21,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:21,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 130 transitions, 1153 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:21,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:21,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:21,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:21,533 INFO L124 PetriNetUnfolderBase]: 1855/3012 cut-off events. [2024-06-03 19:45:21,533 INFO L125 PetriNetUnfolderBase]: For 78024/78026 co-relation queries the response was YES. [2024-06-03 19:45:21,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18053 conditions, 3012 events. 1855/3012 cut-off events. For 78024/78026 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16674 event pairs, 566 based on Foata normal form. 5/3013 useless extension candidates. Maximal degree in co-relation 18000. Up to 2598 conditions per place. [2024-06-03 19:45:21,551 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 101 selfloop transitions, 42 changer transitions 0/153 dead transitions. [2024-06-03 19:45:21,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 153 transitions, 1719 flow [2024-06-03 19:45:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-03 19:45:21,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-03 19:45:21,553 INFO L175 Difference]: Start difference. First operand has 120 places, 130 transitions, 1153 flow. Second operand 7 states and 140 transitions. [2024-06-03 19:45:21,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 153 transitions, 1719 flow [2024-06-03 19:45:21,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 153 transitions, 1647 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-03 19:45:21,596 INFO L231 Difference]: Finished difference. Result has 125 places, 138 transitions, 1317 flow [2024-06-03 19:45:21,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1317, PETRI_PLACES=125, PETRI_TRANSITIONS=138} [2024-06-03 19:45:21,596 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-03 19:45:21,596 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 138 transitions, 1317 flow [2024-06-03 19:45:21,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:21,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:21,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:21,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:45:21,597 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)] === [2024-06-03 19:45:21,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash -71418407, now seen corresponding path program 3 times [2024-06-03 19:45:21,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:21,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036288772] [2024-06-03 19:45:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:21,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:22,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:22,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036288772] [2024-06-03 19:45:22,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036288772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:22,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:22,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:22,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207893576] [2024-06-03 19:45:22,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:22,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:22,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:22,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:22,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:22,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:22,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 138 transitions, 1317 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:22,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:22,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:22,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:22,853 INFO L124 PetriNetUnfolderBase]: 1927/3083 cut-off events. [2024-06-03 19:45:22,853 INFO L125 PetriNetUnfolderBase]: For 84629/84639 co-relation queries the response was YES. [2024-06-03 19:45:22,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19253 conditions, 3083 events. 1927/3083 cut-off events. For 84629/84639 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16732 event pairs, 575 based on Foata normal form. 9/3090 useless extension candidates. Maximal degree in co-relation 19197. Up to 2901 conditions per place. [2024-06-03 19:45:22,875 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 116 selfloop transitions, 27 changer transitions 0/148 dead transitions. [2024-06-03 19:45:22,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 148 transitions, 1627 flow [2024-06-03 19:45:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 19:45:22,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-03 19:45:22,876 INFO L175 Difference]: Start difference. First operand has 125 places, 138 transitions, 1317 flow. Second operand 7 states and 123 transitions. [2024-06-03 19:45:22,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 148 transitions, 1627 flow [2024-06-03 19:45:22,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 148 transitions, 1453 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:22,926 INFO L231 Difference]: Finished difference. Result has 128 places, 138 transitions, 1203 flow [2024-06-03 19:45:22,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1203, PETRI_PLACES=128, PETRI_TRANSITIONS=138} [2024-06-03 19:45:22,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-03 19:45:22,927 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 138 transitions, 1203 flow [2024-06-03 19:45:22,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:22,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:22,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:22,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:45:22,928 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)] === [2024-06-03 19:45:22,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:22,928 INFO L85 PathProgramCache]: Analyzing trace with hash -248901281, now seen corresponding path program 1 times [2024-06-03 19:45:22,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:22,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220828858] [2024-06-03 19:45:22,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:22,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:23,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:23,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220828858] [2024-06-03 19:45:23,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220828858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:23,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:23,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:23,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831306170] [2024-06-03 19:45:23,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:23,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:23,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:23,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:23,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:23,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:45:23,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 138 transitions, 1203 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:23,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:23,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:45:23,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:24,255 INFO L124 PetriNetUnfolderBase]: 1663/2810 cut-off events. [2024-06-03 19:45:24,256 INFO L125 PetriNetUnfolderBase]: For 75216/75216 co-relation queries the response was YES. [2024-06-03 19:45:24,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16626 conditions, 2810 events. 1663/2810 cut-off events. For 75216/75216 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16100 event pairs, 459 based on Foata normal form. 1/2810 useless extension candidates. Maximal degree in co-relation 16569. Up to 2500 conditions per place. [2024-06-03 19:45:24,276 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 132 selfloop transitions, 14 changer transitions 0/157 dead transitions. [2024-06-03 19:45:24,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 157 transitions, 1581 flow [2024-06-03 19:45:24,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:24,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 19:45:24,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-03 19:45:24,278 INFO L175 Difference]: Start difference. First operand has 128 places, 138 transitions, 1203 flow. Second operand 7 states and 138 transitions. [2024-06-03 19:45:24,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 157 transitions, 1581 flow [2024-06-03 19:45:24,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 157 transitions, 1519 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:24,323 INFO L231 Difference]: Finished difference. Result has 129 places, 141 transitions, 1227 flow [2024-06-03 19:45:24,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1227, PETRI_PLACES=129, PETRI_TRANSITIONS=141} [2024-06-03 19:45:24,323 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-03 19:45:24,324 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 141 transitions, 1227 flow [2024-06-03 19:45:24,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:24,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:24,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:24,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:45:24,324 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)] === [2024-06-03 19:45:24,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:24,325 INFO L85 PathProgramCache]: Analyzing trace with hash -248781125, now seen corresponding path program 1 times [2024-06-03 19:45:24,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:24,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103203158] [2024-06-03 19:45:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:24,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:25,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:25,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103203158] [2024-06-03 19:45:25,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103203158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:25,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:25,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:25,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146537297] [2024-06-03 19:45:25,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:25,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:25,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:25,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:25,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:25,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:25,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 141 transitions, 1227 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:25,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:25,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:25,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:25,523 INFO L124 PetriNetUnfolderBase]: 1767/2920 cut-off events. [2024-06-03 19:45:25,524 INFO L125 PetriNetUnfolderBase]: For 80379/80379 co-relation queries the response was YES. [2024-06-03 19:45:25,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17530 conditions, 2920 events. 1767/2920 cut-off events. For 80379/80379 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16381 event pairs, 498 based on Foata normal form. 2/2921 useless extension candidates. Maximal degree in co-relation 17472. Up to 2683 conditions per place. [2024-06-03 19:45:25,546 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 14 changer transitions 0/159 dead transitions. [2024-06-03 19:45:25,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 159 transitions, 1623 flow [2024-06-03 19:45:25,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:25,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 19:45:25,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-03 19:45:25,548 INFO L175 Difference]: Start difference. First operand has 129 places, 141 transitions, 1227 flow. Second operand 7 states and 131 transitions. [2024-06-03 19:45:25,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 159 transitions, 1623 flow [2024-06-03 19:45:25,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 159 transitions, 1559 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:25,593 INFO L231 Difference]: Finished difference. Result has 131 places, 144 transitions, 1245 flow [2024-06-03 19:45:25,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1245, PETRI_PLACES=131, PETRI_TRANSITIONS=144} [2024-06-03 19:45:25,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-03 19:45:25,594 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 144 transitions, 1245 flow [2024-06-03 19:45:25,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:25,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:25,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:25,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:45:25,595 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:25,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:25,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1641936933, now seen corresponding path program 2 times [2024-06-03 19:45:25,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:25,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795306112] [2024-06-03 19:45:25,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:25,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:26,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:26,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795306112] [2024-06-03 19:45:26,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795306112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:26,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:26,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:26,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721832852] [2024-06-03 19:45:26,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:26,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:26,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:26,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:26,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:26,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:26,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 144 transitions, 1245 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:26,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:26,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:26,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:26,852 INFO L124 PetriNetUnfolderBase]: 1785/2930 cut-off events. [2024-06-03 19:45:26,853 INFO L125 PetriNetUnfolderBase]: For 83861/83863 co-relation queries the response was YES. [2024-06-03 19:45:26,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18138 conditions, 2930 events. 1785/2930 cut-off events. For 83861/83863 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16288 event pairs, 505 based on Foata normal form. 4/2933 useless extension candidates. Maximal degree in co-relation 18079. Up to 2679 conditions per place. [2024-06-03 19:45:26,875 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 132 selfloop transitions, 26 changer transitions 0/164 dead transitions. [2024-06-03 19:45:26,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 164 transitions, 1767 flow [2024-06-03 19:45:26,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:26,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:45:26,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-03 19:45:26,877 INFO L175 Difference]: Start difference. First operand has 131 places, 144 transitions, 1245 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:45:26,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 164 transitions, 1767 flow [2024-06-03 19:45:26,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 164 transitions, 1707 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:26,932 INFO L231 Difference]: Finished difference. Result has 133 places, 150 transitions, 1345 flow [2024-06-03 19:45:26,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1345, PETRI_PLACES=133, PETRI_TRANSITIONS=150} [2024-06-03 19:45:26,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-03 19:45:26,933 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 150 transitions, 1345 flow [2024-06-03 19:45:26,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:26,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:26,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:26,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:45:26,933 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:26,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1642174083, now seen corresponding path program 3 times [2024-06-03 19:45:26,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:26,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683363508] [2024-06-03 19:45:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:26,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:27,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:27,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683363508] [2024-06-03 19:45:27,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683363508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:27,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:27,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:27,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141103986] [2024-06-03 19:45:27,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:27,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:27,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:27,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:27,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:27,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:27,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 150 transitions, 1345 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:27,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:27,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:27,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:28,167 INFO L124 PetriNetUnfolderBase]: 1779/2922 cut-off events. [2024-06-03 19:45:28,168 INFO L125 PetriNetUnfolderBase]: For 88858/88860 co-relation queries the response was YES. [2024-06-03 19:45:28,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18432 conditions, 2922 events. 1779/2922 cut-off events. For 88858/88860 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16280 event pairs, 502 based on Foata normal form. 4/2925 useless extension candidates. Maximal degree in co-relation 18372. Up to 2674 conditions per place. [2024-06-03 19:45:28,189 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 130 selfloop transitions, 27 changer transitions 0/163 dead transitions. [2024-06-03 19:45:28,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 163 transitions, 1707 flow [2024-06-03 19:45:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:45:28,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-03 19:45:28,191 INFO L175 Difference]: Start difference. First operand has 133 places, 150 transitions, 1345 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:45:28,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 163 transitions, 1707 flow [2024-06-03 19:45:28,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 163 transitions, 1609 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-03 19:45:28,242 INFO L231 Difference]: Finished difference. Result has 137 places, 150 transitions, 1307 flow [2024-06-03 19:45:28,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1307, PETRI_PLACES=137, PETRI_TRANSITIONS=150} [2024-06-03 19:45:28,243 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-03 19:45:28,243 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 150 transitions, 1307 flow [2024-06-03 19:45:28,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:28,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:28,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:28,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:45:28,244 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:28,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:28,244 INFO L85 PathProgramCache]: Analyzing trace with hash -333375003, now seen corresponding path program 1 times [2024-06-03 19:45:28,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:28,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155510097] [2024-06-03 19:45:28,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:28,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:29,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:29,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155510097] [2024-06-03 19:45:29,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155510097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:29,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:29,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:29,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130220891] [2024-06-03 19:45:29,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:29,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:29,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:29,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:29,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:29,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 150 transitions, 1307 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:29,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:29,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:29,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:29,662 INFO L124 PetriNetUnfolderBase]: 1961/3134 cut-off events. [2024-06-03 19:45:29,663 INFO L125 PetriNetUnfolderBase]: For 111140/111142 co-relation queries the response was YES. [2024-06-03 19:45:29,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20571 conditions, 3134 events. 1961/3134 cut-off events. For 111140/111142 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17104 event pairs, 573 based on Foata normal form. 5/3138 useless extension candidates. Maximal degree in co-relation 20509. Up to 2885 conditions per place. [2024-06-03 19:45:29,687 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 146 selfloop transitions, 28 changer transitions 0/179 dead transitions. [2024-06-03 19:45:29,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 179 transitions, 1797 flow [2024-06-03 19:45:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:45:29,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-03 19:45:29,689 INFO L175 Difference]: Start difference. First operand has 137 places, 150 transitions, 1307 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:45:29,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 179 transitions, 1797 flow [2024-06-03 19:45:29,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 179 transitions, 1733 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:29,745 INFO L231 Difference]: Finished difference. Result has 139 places, 154 transitions, 1382 flow [2024-06-03 19:45:29,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1382, PETRI_PLACES=139, PETRI_TRANSITIONS=154} [2024-06-03 19:45:29,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-03 19:45:29,746 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 154 transitions, 1382 flow [2024-06-03 19:45:29,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:29,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:29,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:29,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:45:29,747 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:29,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash -329830866, now seen corresponding path program 1 times [2024-06-03 19:45:29,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:29,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710783210] [2024-06-03 19:45:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:29,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:30,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:30,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710783210] [2024-06-03 19:45:30,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710783210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:30,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:30,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:30,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917715683] [2024-06-03 19:45:30,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:30,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:30,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:30,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:30,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:30,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 154 transitions, 1382 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:30,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:30,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:30,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:31,062 INFO L124 PetriNetUnfolderBase]: 1924/3109 cut-off events. [2024-06-03 19:45:31,062 INFO L125 PetriNetUnfolderBase]: For 120771/120773 co-relation queries the response was YES. [2024-06-03 19:45:31,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21225 conditions, 3109 events. 1924/3109 cut-off events. For 120771/120773 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17251 event pairs, 547 based on Foata normal form. 6/3114 useless extension candidates. Maximal degree in co-relation 21162. Up to 2774 conditions per place. [2024-06-03 19:45:31,088 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 141 selfloop transitions, 23 changer transitions 0/178 dead transitions. [2024-06-03 19:45:31,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 178 transitions, 1823 flow [2024-06-03 19:45:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-03 19:45:31,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-03 19:45:31,089 INFO L175 Difference]: Start difference. First operand has 139 places, 154 transitions, 1382 flow. Second operand 7 states and 141 transitions. [2024-06-03 19:45:31,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 178 transitions, 1823 flow [2024-06-03 19:45:31,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 178 transitions, 1712 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:31,159 INFO L231 Difference]: Finished difference. Result has 140 places, 158 transitions, 1389 flow [2024-06-03 19:45:31,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1389, PETRI_PLACES=140, PETRI_TRANSITIONS=158} [2024-06-03 19:45:31,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-03 19:45:31,160 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 158 transitions, 1389 flow [2024-06-03 19:45:31,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:31,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:31,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:31,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:45:31,160 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:31,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash -324116946, now seen corresponding path program 2 times [2024-06-03 19:45:31,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:31,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457658588] [2024-06-03 19:45:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:31,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:31,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:31,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457658588] [2024-06-03 19:45:31,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457658588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:31,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:31,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:31,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691718366] [2024-06-03 19:45:31,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:31,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:31,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:31,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:31,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:31,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:31,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 158 transitions, 1389 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:31,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:31,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:31,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:32,439 INFO L124 PetriNetUnfolderBase]: 1926/3117 cut-off events. [2024-06-03 19:45:32,439 INFO L125 PetriNetUnfolderBase]: For 125710/125712 co-relation queries the response was YES. [2024-06-03 19:45:32,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21348 conditions, 3117 events. 1926/3117 cut-off events. For 125710/125712 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17375 event pairs, 546 based on Foata normal form. 6/3122 useless extension candidates. Maximal degree in co-relation 21284. Up to 2723 conditions per place. [2024-06-03 19:45:32,464 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 131 selfloop transitions, 35 changer transitions 0/180 dead transitions. [2024-06-03 19:45:32,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 180 transitions, 1903 flow [2024-06-03 19:45:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-03 19:45:32,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-03 19:45:32,466 INFO L175 Difference]: Start difference. First operand has 140 places, 158 transitions, 1389 flow. Second operand 7 states and 141 transitions. [2024-06-03 19:45:32,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 180 transitions, 1903 flow [2024-06-03 19:45:32,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 180 transitions, 1841 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-03 19:45:32,542 INFO L231 Difference]: Finished difference. Result has 144 places, 161 transitions, 1464 flow [2024-06-03 19:45:32,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1464, PETRI_PLACES=144, PETRI_TRANSITIONS=161} [2024-06-03 19:45:32,543 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-03 19:45:32,543 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 161 transitions, 1464 flow [2024-06-03 19:45:32,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:32,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:32,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:32,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:45:32,544 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:32,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:32,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2079825596, now seen corresponding path program 1 times [2024-06-03 19:45:32,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:32,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017463329] [2024-06-03 19:45:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:32,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:33,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017463329] [2024-06-03 19:45:33,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017463329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:33,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:33,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:33,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632630810] [2024-06-03 19:45:33,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:33,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:33,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:33,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:33,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:33,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:33,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 161 transitions, 1464 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:33,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:33,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:33,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:33,906 INFO L124 PetriNetUnfolderBase]: 1990/3180 cut-off events. [2024-06-03 19:45:33,907 INFO L125 PetriNetUnfolderBase]: For 129180/129180 co-relation queries the response was YES. [2024-06-03 19:45:33,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21828 conditions, 3180 events. 1990/3180 cut-off events. For 129180/129180 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17398 event pairs, 567 based on Foata normal form. 1/3180 useless extension candidates. Maximal degree in co-relation 21763. Up to 3002 conditions per place. [2024-06-03 19:45:33,931 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 159 selfloop transitions, 17 changer transitions 0/181 dead transitions. [2024-06-03 19:45:33,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 181 transitions, 1918 flow [2024-06-03 19:45:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:45:33,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-03 19:45:33,932 INFO L175 Difference]: Start difference. First operand has 144 places, 161 transitions, 1464 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:45:33,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 181 transitions, 1918 flow [2024-06-03 19:45:34,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 181 transitions, 1831 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:34,004 INFO L231 Difference]: Finished difference. Result has 148 places, 164 transitions, 1483 flow [2024-06-03 19:45:34,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1483, PETRI_PLACES=148, PETRI_TRANSITIONS=164} [2024-06-03 19:45:34,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-03 19:45:34,005 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 164 transitions, 1483 flow [2024-06-03 19:45:34,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:34,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:34,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:34,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:45:34,005 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:34,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:34,006 INFO L85 PathProgramCache]: Analyzing trace with hash -324109413, now seen corresponding path program 2 times [2024-06-03 19:45:34,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:34,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834415530] [2024-06-03 19:45:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:34,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:34,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:34,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834415530] [2024-06-03 19:45:34,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834415530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:34,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:34,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:34,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835469154] [2024-06-03 19:45:34,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:34,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:34,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:34,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:34,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:34,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:34,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 164 transitions, 1483 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:34,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:34,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:34,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:35,407 INFO L124 PetriNetUnfolderBase]: 2049/3269 cut-off events. [2024-06-03 19:45:35,408 INFO L125 PetriNetUnfolderBase]: For 138018/138020 co-relation queries the response was YES. [2024-06-03 19:45:35,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22877 conditions, 3269 events. 2049/3269 cut-off events. For 138018/138020 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17916 event pairs, 561 based on Foata normal form. 5/3273 useless extension candidates. Maximal degree in co-relation 22811. Up to 2876 conditions per place. [2024-06-03 19:45:35,435 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 146 selfloop transitions, 44 changer transitions 0/195 dead transitions. [2024-06-03 19:45:35,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 195 transitions, 2261 flow [2024-06-03 19:45:35,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:35,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:35,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:45:35,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-03 19:45:35,436 INFO L175 Difference]: Start difference. First operand has 148 places, 164 transitions, 1483 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:45:35,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 195 transitions, 2261 flow [2024-06-03 19:45:35,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 195 transitions, 2177 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:35,524 INFO L231 Difference]: Finished difference. Result has 151 places, 172 transitions, 1671 flow [2024-06-03 19:45:35,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1671, PETRI_PLACES=151, PETRI_TRANSITIONS=172} [2024-06-03 19:45:35,525 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-03 19:45:35,525 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 172 transitions, 1671 flow [2024-06-03 19:45:35,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:35,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:35,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:35,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:45:35,526 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:35,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:35,526 INFO L85 PathProgramCache]: Analyzing trace with hash -324120573, now seen corresponding path program 3 times [2024-06-03 19:45:35,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:35,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977912831] [2024-06-03 19:45:35,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:35,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:36,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:36,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977912831] [2024-06-03 19:45:36,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977912831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:36,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:36,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:36,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089221440] [2024-06-03 19:45:36,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:36,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:36,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:36,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:36,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:36,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:36,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 172 transitions, 1671 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:36,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:36,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:36,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:36,869 INFO L124 PetriNetUnfolderBase]: 2060/3287 cut-off events. [2024-06-03 19:45:36,869 INFO L125 PetriNetUnfolderBase]: For 148932/148934 co-relation queries the response was YES. [2024-06-03 19:45:36,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23903 conditions, 3287 events. 2060/3287 cut-off events. For 148932/148934 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18091 event pairs, 566 based on Foata normal form. 5/3291 useless extension candidates. Maximal degree in co-relation 23835. Up to 2889 conditions per place. [2024-06-03 19:45:36,895 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 144 selfloop transitions, 48 changer transitions 0/197 dead transitions. [2024-06-03 19:45:36,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 197 transitions, 2286 flow [2024-06-03 19:45:36,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:45:36,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-03 19:45:36,896 INFO L175 Difference]: Start difference. First operand has 151 places, 172 transitions, 1671 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:45:36,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 197 transitions, 2286 flow [2024-06-03 19:45:36,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 197 transitions, 2148 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:36,983 INFO L231 Difference]: Finished difference. Result has 155 places, 176 transitions, 1727 flow [2024-06-03 19:45:36,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1727, PETRI_PLACES=155, PETRI_TRANSITIONS=176} [2024-06-03 19:45:36,984 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-03 19:45:36,984 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 176 transitions, 1727 flow [2024-06-03 19:45:36,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:36,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:36,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:36,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:45:36,985 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)] === [2024-06-03 19:45:36,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:36,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2090526246, now seen corresponding path program 3 times [2024-06-03 19:45:36,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:36,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285986505] [2024-06-03 19:45:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:36,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:37,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:37,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285986505] [2024-06-03 19:45:37,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285986505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:37,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:37,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:37,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956601738] [2024-06-03 19:45:37,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:37,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:37,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:37,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:37,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:37,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:37,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 176 transitions, 1727 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:37,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:37,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:37,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:38,303 INFO L124 PetriNetUnfolderBase]: 1988/3200 cut-off events. [2024-06-03 19:45:38,303 INFO L125 PetriNetUnfolderBase]: For 154540/154540 co-relation queries the response was YES. [2024-06-03 19:45:38,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23638 conditions, 3200 events. 1988/3200 cut-off events. For 154540/154540 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17718 event pairs, 572 based on Foata normal form. 2/3198 useless extension candidates. Maximal degree in co-relation 23568. Up to 2844 conditions per place. [2024-06-03 19:45:38,331 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 153 selfloop transitions, 23 changer transitions 0/193 dead transitions. [2024-06-03 19:45:38,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 193 transitions, 2127 flow [2024-06-03 19:45:38,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:38,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 19:45:38,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-03 19:45:38,332 INFO L175 Difference]: Start difference. First operand has 155 places, 176 transitions, 1727 flow. Second operand 7 states and 138 transitions. [2024-06-03 19:45:38,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 193 transitions, 2127 flow [2024-06-03 19:45:38,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 193 transitions, 1977 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:38,431 INFO L231 Difference]: Finished difference. Result has 157 places, 176 transitions, 1629 flow [2024-06-03 19:45:38,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1629, PETRI_PLACES=157, PETRI_TRANSITIONS=176} [2024-06-03 19:45:38,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-03 19:45:38,432 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 176 transitions, 1629 flow [2024-06-03 19:45:38,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:38,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:38,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:38,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:45:38,433 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)] === [2024-06-03 19:45:38,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:38,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1525577038, now seen corresponding path program 4 times [2024-06-03 19:45:38,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:38,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657613245] [2024-06-03 19:45:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:38,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:39,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:39,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657613245] [2024-06-03 19:45:39,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657613245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:39,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:39,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:39,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799372350] [2024-06-03 19:45:39,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:39,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:39,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:39,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:39,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:39,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 176 transitions, 1629 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:39,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:39,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:39,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:39,726 INFO L124 PetriNetUnfolderBase]: 2013/3237 cut-off events. [2024-06-03 19:45:39,726 INFO L125 PetriNetUnfolderBase]: For 163458/163474 co-relation queries the response was YES. [2024-06-03 19:45:39,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23969 conditions, 3237 events. 2013/3237 cut-off events. For 163458/163474 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18088 event pairs, 558 based on Foata normal form. 2/3220 useless extension candidates. Maximal degree in co-relation 23898. Up to 2853 conditions per place. [2024-06-03 19:45:39,754 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 145 selfloop transitions, 32 changer transitions 0/194 dead transitions. [2024-06-03 19:45:39,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 194 transitions, 2083 flow [2024-06-03 19:45:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 19:45:39,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-03 19:45:39,756 INFO L175 Difference]: Start difference. First operand has 157 places, 176 transitions, 1629 flow. Second operand 7 states and 138 transitions. [2024-06-03 19:45:39,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 194 transitions, 2083 flow [2024-06-03 19:45:39,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 194 transitions, 1945 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-03 19:45:39,830 INFO L231 Difference]: Finished difference. Result has 154 places, 179 transitions, 1619 flow [2024-06-03 19:45:39,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1619, PETRI_PLACES=154, PETRI_TRANSITIONS=179} [2024-06-03 19:45:39,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-03 19:45:39,831 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 179 transitions, 1619 flow [2024-06-03 19:45:39,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:39,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:39,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:39,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:45:39,832 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)] === [2024-06-03 19:45:39,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:39,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2068102702, now seen corresponding path program 5 times [2024-06-03 19:45:39,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:39,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45807276] [2024-06-03 19:45:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:39,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:40,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:40,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45807276] [2024-06-03 19:45:40,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45807276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:40,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:40,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:40,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037532741] [2024-06-03 19:45:40,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:40,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:40,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:40,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:40,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:40,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:40,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 179 transitions, 1619 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:40,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:40,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:40,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:41,105 INFO L124 PetriNetUnfolderBase]: 2011/3249 cut-off events. [2024-06-03 19:45:41,106 INFO L125 PetriNetUnfolderBase]: For 170314/170332 co-relation queries the response was YES. [2024-06-03 19:45:41,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24092 conditions, 3249 events. 2011/3249 cut-off events. For 170314/170332 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18305 event pairs, 567 based on Foata normal form. 6/3236 useless extension candidates. Maximal degree in co-relation 24020. Up to 2757 conditions per place. [2024-06-03 19:45:41,132 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 128 selfloop transitions, 51 changer transitions 0/196 dead transitions. [2024-06-03 19:45:41,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 196 transitions, 2165 flow [2024-06-03 19:45:41,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 19:45:41,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-03 19:45:41,133 INFO L175 Difference]: Start difference. First operand has 154 places, 179 transitions, 1619 flow. Second operand 7 states and 139 transitions. [2024-06-03 19:45:41,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 196 transitions, 2165 flow [2024-06-03 19:45:41,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 196 transitions, 2069 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:41,233 INFO L231 Difference]: Finished difference. Result has 156 places, 182 transitions, 1693 flow [2024-06-03 19:45:41,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1693, PETRI_PLACES=156, PETRI_TRANSITIONS=182} [2024-06-03 19:45:41,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-03 19:45:41,234 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 182 transitions, 1693 flow [2024-06-03 19:45:41,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:41,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:41,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:41,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:45:41,235 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:41,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:41,235 INFO L85 PathProgramCache]: Analyzing trace with hash -639575548, now seen corresponding path program 6 times [2024-06-03 19:45:41,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:41,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376626780] [2024-06-03 19:45:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:41,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:41,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:41,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376626780] [2024-06-03 19:45:41,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376626780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:41,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:41,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:45:41,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403688499] [2024-06-03 19:45:41,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:41,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:45:41,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:41,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:45:41,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:45:41,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:41,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 182 transitions, 1693 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:41,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:41,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:41,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:42,512 INFO L124 PetriNetUnfolderBase]: 2001/3237 cut-off events. [2024-06-03 19:45:42,512 INFO L125 PetriNetUnfolderBase]: For 173787/173805 co-relation queries the response was YES. [2024-06-03 19:45:42,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24124 conditions, 3237 events. 2001/3237 cut-off events. For 173787/173805 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18239 event pairs, 572 based on Foata normal form. 4/3222 useless extension candidates. Maximal degree in co-relation 24051. Up to 2749 conditions per place. [2024-06-03 19:45:42,539 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 123 selfloop transitions, 55 changer transitions 0/195 dead transitions. [2024-06-03 19:45:42,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 195 transitions, 2097 flow [2024-06-03 19:45:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:45:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:45:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 19:45:42,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-03 19:45:42,540 INFO L175 Difference]: Start difference. First operand has 156 places, 182 transitions, 1693 flow. Second operand 7 states and 137 transitions. [2024-06-03 19:45:42,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 195 transitions, 2097 flow [2024-06-03 19:45:42,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 195 transitions, 1941 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:42,657 INFO L231 Difference]: Finished difference. Result has 159 places, 182 transitions, 1653 flow [2024-06-03 19:45:42,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1653, PETRI_PLACES=159, PETRI_TRANSITIONS=182} [2024-06-03 19:45:42,658 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-03 19:45:42,659 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 182 transitions, 1653 flow [2024-06-03 19:45:42,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:42,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:42,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:42,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:45:42,659 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:42,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:42,660 INFO L85 PathProgramCache]: Analyzing trace with hash -632394925, now seen corresponding path program 4 times [2024-06-03 19:45:42,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:42,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214811698] [2024-06-03 19:45:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:42,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:43,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:43,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214811698] [2024-06-03 19:45:43,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214811698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:43,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:43,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:43,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422364032] [2024-06-03 19:45:43,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:43,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:43,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:43,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:43,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:43,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:43,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 182 transitions, 1653 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:43,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:43,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:43,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:43,988 INFO L124 PetriNetUnfolderBase]: 2117/3373 cut-off events. [2024-06-03 19:45:43,989 INFO L125 PetriNetUnfolderBase]: For 182554/182556 co-relation queries the response was YES. [2024-06-03 19:45:44,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25233 conditions, 3373 events. 2117/3373 cut-off events. For 182554/182556 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18589 event pairs, 591 based on Foata normal form. 5/3374 useless extension candidates. Maximal degree in co-relation 25159. Up to 2788 conditions per place. [2024-06-03 19:45:44,020 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 124 selfloop transitions, 83 changer transitions 0/212 dead transitions. [2024-06-03 19:45:44,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 212 transitions, 2583 flow [2024-06-03 19:45:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:44,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:45:44,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:45:44,022 INFO L175 Difference]: Start difference. First operand has 159 places, 182 transitions, 1653 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:45:44,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 212 transitions, 2583 flow [2024-06-03 19:45:44,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 212 transitions, 2433 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 19:45:44,140 INFO L231 Difference]: Finished difference. Result has 161 places, 193 transitions, 1916 flow [2024-06-03 19:45:44,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1916, PETRI_PLACES=161, PETRI_TRANSITIONS=193} [2024-06-03 19:45:44,141 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-03 19:45:44,141 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 193 transitions, 1916 flow [2024-06-03 19:45:44,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:44,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:44,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:44,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:45:44,142 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:44,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:44,142 INFO L85 PathProgramCache]: Analyzing trace with hash -632394522, now seen corresponding path program 2 times [2024-06-03 19:45:44,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:44,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330187206] [2024-06-03 19:45:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:44,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:44,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:44,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330187206] [2024-06-03 19:45:44,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330187206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:44,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:44,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:44,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974624506] [2024-06-03 19:45:44,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:44,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:44,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:44,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:44,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:44,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:44,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 193 transitions, 1916 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:44,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:44,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:44,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:45,377 INFO L124 PetriNetUnfolderBase]: 2130/3393 cut-off events. [2024-06-03 19:45:45,378 INFO L125 PetriNetUnfolderBase]: For 195383/195393 co-relation queries the response was YES. [2024-06-03 19:45:45,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26382 conditions, 3393 events. 2130/3393 cut-off events. For 195383/195393 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18733 event pairs, 595 based on Foata normal form. 9/3400 useless extension candidates. Maximal degree in co-relation 26306. Up to 3168 conditions per place. [2024-06-03 19:45:45,408 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 174 selfloop transitions, 38 changer transitions 0/217 dead transitions. [2024-06-03 19:45:45,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 217 transitions, 2778 flow [2024-06-03 19:45:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:45,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:45,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 19:45:45,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-03 19:45:45,412 INFO L175 Difference]: Start difference. First operand has 161 places, 193 transitions, 1916 flow. Second operand 8 states and 141 transitions. [2024-06-03 19:45:45,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 217 transitions, 2778 flow [2024-06-03 19:45:45,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 217 transitions, 2606 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-03 19:45:45,543 INFO L231 Difference]: Finished difference. Result has 167 places, 204 transitions, 2089 flow [2024-06-03 19:45:45,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2089, PETRI_PLACES=167, PETRI_TRANSITIONS=204} [2024-06-03 19:45:45,545 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-03 19:45:45,545 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 204 transitions, 2089 flow [2024-06-03 19:45:45,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:45,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:45,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:45,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:45:45,545 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:45,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:45,546 INFO L85 PathProgramCache]: Analyzing trace with hash -631949052, now seen corresponding path program 3 times [2024-06-03 19:45:45,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:45,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582205618] [2024-06-03 19:45:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:45,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:46,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:46,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582205618] [2024-06-03 19:45:46,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582205618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:46,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:46,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:46,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671256869] [2024-06-03 19:45:46,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:46,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:46,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:46,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:46,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:46,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:46,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 204 transitions, 2089 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:46,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:46,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:46,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:46,878 INFO L124 PetriNetUnfolderBase]: 2127/3389 cut-off events. [2024-06-03 19:45:46,879 INFO L125 PetriNetUnfolderBase]: For 200548/200558 co-relation queries the response was YES. [2024-06-03 19:45:46,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26190 conditions, 3389 events. 2127/3389 cut-off events. For 200548/200558 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18706 event pairs, 595 based on Foata normal form. 9/3396 useless extension candidates. Maximal degree in co-relation 26111. Up to 3165 conditions per place. [2024-06-03 19:45:46,910 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 171 selfloop transitions, 40 changer transitions 0/216 dead transitions. [2024-06-03 19:45:46,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 216 transitions, 2627 flow [2024-06-03 19:45:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:45:46,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-03 19:45:46,911 INFO L175 Difference]: Start difference. First operand has 167 places, 204 transitions, 2089 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:45:46,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 216 transitions, 2627 flow [2024-06-03 19:45:47,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 216 transitions, 2467 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-03 19:45:47,078 INFO L231 Difference]: Finished difference. Result has 172 places, 204 transitions, 2015 flow [2024-06-03 19:45:47,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1929, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2015, PETRI_PLACES=172, PETRI_TRANSITIONS=204} [2024-06-03 19:45:47,079 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-03 19:45:47,079 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 204 transitions, 2015 flow [2024-06-03 19:45:47,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:47,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:47,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:47,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:45:47,080 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:47,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash -645281935, now seen corresponding path program 5 times [2024-06-03 19:45:47,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:47,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063126877] [2024-06-03 19:45:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:47,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:47,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063126877] [2024-06-03 19:45:47,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063126877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:47,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:47,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:47,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300360596] [2024-06-03 19:45:47,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:47,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:47,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:47,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:47,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:47,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:47,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 204 transitions, 2015 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:47,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:47,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:47,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:48,482 INFO L124 PetriNetUnfolderBase]: 2146/3422 cut-off events. [2024-06-03 19:45:48,482 INFO L125 PetriNetUnfolderBase]: For 209092/209094 co-relation queries the response was YES. [2024-06-03 19:45:48,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26546 conditions, 3422 events. 2146/3422 cut-off events. For 209092/209094 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18970 event pairs, 602 based on Foata normal form. 5/3423 useless extension candidates. Maximal degree in co-relation 26465. Up to 2821 conditions per place. [2024-06-03 19:45:48,513 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 143 selfloop transitions, 80 changer transitions 0/228 dead transitions. [2024-06-03 19:45:48,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 228 transitions, 2961 flow [2024-06-03 19:45:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:45:48,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-03 19:45:48,515 INFO L175 Difference]: Start difference. First operand has 172 places, 204 transitions, 2015 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:45:48,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 228 transitions, 2961 flow [2024-06-03 19:45:48,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 228 transitions, 2880 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:48,657 INFO L231 Difference]: Finished difference. Result has 175 places, 209 transitions, 2242 flow [2024-06-03 19:45:48,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2242, PETRI_PLACES=175, PETRI_TRANSITIONS=209} [2024-06-03 19:45:48,657 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-03 19:45:48,658 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 209 transitions, 2242 flow [2024-06-03 19:45:48,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:48,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:48,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:48,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:45:48,658 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:48,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:48,659 INFO L85 PathProgramCache]: Analyzing trace with hash -50763931, now seen corresponding path program 6 times [2024-06-03 19:45:48,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:48,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57426400] [2024-06-03 19:45:48,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:48,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:49,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:49,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57426400] [2024-06-03 19:45:49,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57426400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:49,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:49,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:49,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447935851] [2024-06-03 19:45:49,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:49,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:49,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:49,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:49,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:49,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:49,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 209 transitions, 2242 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:49,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:49,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:49,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:50,094 INFO L124 PetriNetUnfolderBase]: 2153/3432 cut-off events. [2024-06-03 19:45:50,095 INFO L125 PetriNetUnfolderBase]: For 219897/219899 co-relation queries the response was YES. [2024-06-03 19:45:50,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27244 conditions, 3432 events. 2153/3432 cut-off events. For 219897/219899 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18976 event pairs, 605 based on Foata normal form. 5/3433 useless extension candidates. Maximal degree in co-relation 27161. Up to 2829 conditions per place. [2024-06-03 19:45:50,128 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 137 selfloop transitions, 88 changer transitions 0/230 dead transitions. [2024-06-03 19:45:50,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 230 transitions, 3039 flow [2024-06-03 19:45:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:45:50,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-03 19:45:50,129 INFO L175 Difference]: Start difference. First operand has 175 places, 209 transitions, 2242 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:45:50,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 230 transitions, 3039 flow [2024-06-03 19:45:50,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 230 transitions, 2709 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-03 19:45:50,337 INFO L231 Difference]: Finished difference. Result has 176 places, 213 transitions, 2198 flow [2024-06-03 19:45:50,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1928, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2198, PETRI_PLACES=176, PETRI_TRANSITIONS=213} [2024-06-03 19:45:50,338 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-03 19:45:50,338 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 213 transitions, 2198 flow [2024-06-03 19:45:50,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:50,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:50,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:50,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:45:50,339 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:50,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:50,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2068110638, now seen corresponding path program 4 times [2024-06-03 19:45:50,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:50,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253960411] [2024-06-03 19:45:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:50,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:51,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:51,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253960411] [2024-06-03 19:45:51,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253960411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:51,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:51,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:51,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057463178] [2024-06-03 19:45:51,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:51,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:51,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:51,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:51,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:51,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:51,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 213 transitions, 2198 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:51,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:51,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:51,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:51,789 INFO L124 PetriNetUnfolderBase]: 2150/3430 cut-off events. [2024-06-03 19:45:51,789 INFO L125 PetriNetUnfolderBase]: For 224378/224388 co-relation queries the response was YES. [2024-06-03 19:45:51,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27007 conditions, 3430 events. 2150/3430 cut-off events. For 224378/224388 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19008 event pairs, 598 based on Foata normal form. 9/3437 useless extension candidates. Maximal degree in co-relation 26924. Up to 3199 conditions per place. [2024-06-03 19:45:51,820 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 182 selfloop transitions, 38 changer transitions 0/225 dead transitions. [2024-06-03 19:45:51,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 225 transitions, 2672 flow [2024-06-03 19:45:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:45:51,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-03 19:45:51,821 INFO L175 Difference]: Start difference. First operand has 176 places, 213 transitions, 2198 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:45:51,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 225 transitions, 2672 flow [2024-06-03 19:45:52,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 225 transitions, 2416 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:52,016 INFO L231 Difference]: Finished difference. Result has 179 places, 214 transitions, 2032 flow [2024-06-03 19:45:52,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2032, PETRI_PLACES=179, PETRI_TRANSITIONS=214} [2024-06-03 19:45:52,017 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-03 19:45:52,017 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 214 transitions, 2032 flow [2024-06-03 19:45:52,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:45:52,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:52,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:52,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:45:52,018 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:52,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:52,018 INFO L85 PathProgramCache]: Analyzing trace with hash 873995819, now seen corresponding path program 1 times [2024-06-03 19:45:52,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:52,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978409433] [2024-06-03 19:45:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:52,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:52,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:52,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978409433] [2024-06-03 19:45:52,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978409433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:52,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:52,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:52,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516886050] [2024-06-03 19:45:52,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:52,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:52,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:52,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:53,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:53,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 214 transitions, 2032 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:45:53,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:53,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:53,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:53,744 INFO L124 PetriNetUnfolderBase]: 2043/3320 cut-off events. [2024-06-03 19:45:53,744 INFO L125 PetriNetUnfolderBase]: For 233437/233437 co-relation queries the response was YES. [2024-06-03 19:45:53,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26057 conditions, 3320 events. 2043/3320 cut-off events. For 233437/233437 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18787 event pairs, 548 based on Foata normal form. 1/3320 useless extension candidates. Maximal degree in co-relation 25973. Up to 3039 conditions per place. [2024-06-03 19:45:53,776 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 206 selfloop transitions, 17 changer transitions 0/234 dead transitions. [2024-06-03 19:45:53,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 234 transitions, 2582 flow [2024-06-03 19:45:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:45:53,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:45:53,778 INFO L175 Difference]: Start difference. First operand has 179 places, 214 transitions, 2032 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:45:53,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 234 transitions, 2582 flow [2024-06-03 19:45:53,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 234 transitions, 2518 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:53,958 INFO L231 Difference]: Finished difference. Result has 182 places, 217 transitions, 2076 flow [2024-06-03 19:45:53,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1968, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2076, PETRI_PLACES=182, PETRI_TRANSITIONS=217} [2024-06-03 19:45:53,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-03 19:45:53,959 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 217 transitions, 2076 flow [2024-06-03 19:45:53,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:45:53,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:53,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:53,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:45:53,959 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:53,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:53,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1525590926, now seen corresponding path program 1 times [2024-06-03 19:45:53,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:53,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078786128] [2024-06-03 19:45:53,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:53,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:54,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:54,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078786128] [2024-06-03 19:45:54,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078786128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:54,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:54,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:54,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009806173] [2024-06-03 19:45:54,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:54,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:54,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:54,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:54,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:54,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:54,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 217 transitions, 2076 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:45:54,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:54,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:54,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:55,400 INFO L124 PetriNetUnfolderBase]: 2053/3342 cut-off events. [2024-06-03 19:45:55,400 INFO L125 PetriNetUnfolderBase]: For 246821/246821 co-relation queries the response was YES. [2024-06-03 19:45:55,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26583 conditions, 3342 events. 2053/3342 cut-off events. For 246821/246821 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19023 event pairs, 541 based on Foata normal form. 4/3345 useless extension candidates. Maximal degree in co-relation 26498. Up to 3046 conditions per place. [2024-06-03 19:45:55,432 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 209 selfloop transitions, 17 changer transitions 0/237 dead transitions. [2024-06-03 19:45:55,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 237 transitions, 2640 flow [2024-06-03 19:45:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:45:55,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:45:55,433 INFO L175 Difference]: Start difference. First operand has 182 places, 217 transitions, 2076 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:45:55,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 237 transitions, 2640 flow [2024-06-03 19:45:55,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 237 transitions, 2554 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:55,663 INFO L231 Difference]: Finished difference. Result has 184 places, 220 transitions, 2090 flow [2024-06-03 19:45:55,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1990, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2090, PETRI_PLACES=184, PETRI_TRANSITIONS=220} [2024-06-03 19:45:55,664 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-03 19:45:55,664 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 220 transitions, 2090 flow [2024-06-03 19:45:55,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:45:55,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:55,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:55,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:45:55,665 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:55,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash -639561660, now seen corresponding path program 2 times [2024-06-03 19:45:55,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:55,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385584534] [2024-06-03 19:45:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:55,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:56,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:56,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385584534] [2024-06-03 19:45:56,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385584534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:56,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:56,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:56,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811796295] [2024-06-03 19:45:56,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:56,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:56,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:56,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:56,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:56,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 220 transitions, 2090 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:45:56,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:56,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:56,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:57,151 INFO L124 PetriNetUnfolderBase]: 2082/3394 cut-off events. [2024-06-03 19:45:57,151 INFO L125 PetriNetUnfolderBase]: For 259944/259946 co-relation queries the response was YES. [2024-06-03 19:45:57,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27472 conditions, 3394 events. 2082/3394 cut-off events. For 259944/259946 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19462 event pairs, 546 based on Foata normal form. 6/3399 useless extension candidates. Maximal degree in co-relation 27386. Up to 3025 conditions per place. [2024-06-03 19:45:57,187 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 194 selfloop transitions, 37 changer transitions 0/242 dead transitions. [2024-06-03 19:45:57,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 242 transitions, 2832 flow [2024-06-03 19:45:57,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:45:57,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:45:57,188 INFO L175 Difference]: Start difference. First operand has 184 places, 220 transitions, 2090 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:45:57,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 242 transitions, 2832 flow [2024-06-03 19:45:57,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 242 transitions, 2754 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:57,396 INFO L231 Difference]: Finished difference. Result has 186 places, 226 transitions, 2218 flow [2024-06-03 19:45:57,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2218, PETRI_PLACES=186, PETRI_TRANSITIONS=226} [2024-06-03 19:45:57,405 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-03 19:45:57,405 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 226 transitions, 2218 flow [2024-06-03 19:45:57,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:45:57,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:57,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:57,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:45:57,406 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)] === [2024-06-03 19:45:57,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:57,406 INFO L85 PathProgramCache]: Analyzing trace with hash -631943100, now seen corresponding path program 3 times [2024-06-03 19:45:57,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:57,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837133217] [2024-06-03 19:45:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:57,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:58,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:58,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837133217] [2024-06-03 19:45:58,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837133217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:58,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:58,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:58,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209721739] [2024-06-03 19:45:58,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:58,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:58,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:58,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:58,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:58,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:58,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 226 transitions, 2218 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:45:58,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:58,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:58,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:58,820 INFO L124 PetriNetUnfolderBase]: 2092/3410 cut-off events. [2024-06-03 19:45:58,820 INFO L125 PetriNetUnfolderBase]: For 271266/271268 co-relation queries the response was YES. [2024-06-03 19:45:58,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28059 conditions, 3410 events. 2092/3410 cut-off events. For 271266/271268 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19579 event pairs, 542 based on Foata normal form. 6/3415 useless extension candidates. Maximal degree in co-relation 27972. Up to 3035 conditions per place. [2024-06-03 19:45:58,854 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 191 selfloop transitions, 43 changer transitions 0/245 dead transitions. [2024-06-03 19:45:58,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 245 transitions, 2914 flow [2024-06-03 19:45:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:45:58,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:45:58,855 INFO L175 Difference]: Start difference. First operand has 186 places, 226 transitions, 2218 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:45:58,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 245 transitions, 2914 flow [2024-06-03 19:45:59,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 245 transitions, 2822 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:59,057 INFO L231 Difference]: Finished difference. Result has 190 places, 229 transitions, 2285 flow [2024-06-03 19:45:59,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2130, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2285, PETRI_PLACES=190, PETRI_TRANSITIONS=229} [2024-06-03 19:45:59,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-03 19:45:59,058 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 229 transitions, 2285 flow [2024-06-03 19:45:59,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:45:59,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:59,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:59,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:45:59,059 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)] === [2024-06-03 19:45:59,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:59,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2081182160, now seen corresponding path program 4 times [2024-06-03 19:45:59,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:59,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415649896] [2024-06-03 19:45:59,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:59,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:59,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:59,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415649896] [2024-06-03 19:45:59,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415649896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:59,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:59,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:59,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819178274] [2024-06-03 19:45:59,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:59,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:59,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:59,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:59,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:59,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:59,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 229 transitions, 2285 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:45:59,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:59,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:59,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:00,627 INFO L124 PetriNetUnfolderBase]: 2080/3394 cut-off events. [2024-06-03 19:46:00,627 INFO L125 PetriNetUnfolderBase]: For 274137/274139 co-relation queries the response was YES. [2024-06-03 19:46:00,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27939 conditions, 3394 events. 2080/3394 cut-off events. For 274137/274139 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19456 event pairs, 540 based on Foata normal form. 6/3399 useless extension candidates. Maximal degree in co-relation 27850. Up to 3027 conditions per place. [2024-06-03 19:46:00,657 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 192 selfloop transitions, 41 changer transitions 0/244 dead transitions. [2024-06-03 19:46:00,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 244 transitions, 2809 flow [2024-06-03 19:46:00,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:00,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:00,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:46:00,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:46:00,658 INFO L175 Difference]: Start difference. First operand has 190 places, 229 transitions, 2285 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:46:00,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 244 transitions, 2809 flow [2024-06-03 19:46:00,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 244 transitions, 2646 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-03 19:46:00,854 INFO L231 Difference]: Finished difference. Result has 193 places, 229 transitions, 2210 flow [2024-06-03 19:46:00,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2210, PETRI_PLACES=193, PETRI_TRANSITIONS=229} [2024-06-03 19:46:00,855 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-03 19:46:00,855 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 229 transitions, 2210 flow [2024-06-03 19:46:00,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:00,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:00,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:00,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:46:00,857 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:00,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash -631933180, now seen corresponding path program 1 times [2024-06-03 19:46:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:00,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886837553] [2024-06-03 19:46:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:00,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:01,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:01,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886837553] [2024-06-03 19:46:01,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886837553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:01,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:01,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:01,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865429118] [2024-06-03 19:46:01,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:01,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:01,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:01,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:01,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:02,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:02,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 229 transitions, 2210 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:02,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:02,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:02,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:02,704 INFO L124 PetriNetUnfolderBase]: 2208/3514 cut-off events. [2024-06-03 19:46:02,705 INFO L125 PetriNetUnfolderBase]: For 276974/276974 co-relation queries the response was YES. [2024-06-03 19:46:02,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28615 conditions, 3514 events. 2208/3514 cut-off events. For 276974/276974 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19572 event pairs, 599 based on Foata normal form. 1/3514 useless extension candidates. Maximal degree in co-relation 28525. Up to 3317 conditions per place. [2024-06-03 19:46:02,739 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 219 selfloop transitions, 19 changer transitions 0/243 dead transitions. [2024-06-03 19:46:02,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 243 transitions, 2790 flow [2024-06-03 19:46:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:02,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:02,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 19:46:02,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-03 19:46:02,740 INFO L175 Difference]: Start difference. First operand has 193 places, 229 transitions, 2210 flow. Second operand 8 states and 135 transitions. [2024-06-03 19:46:02,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 243 transitions, 2790 flow [2024-06-03 19:46:02,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 243 transitions, 2679 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:46:02,971 INFO L231 Difference]: Finished difference. Result has 193 places, 232 transitions, 2229 flow [2024-06-03 19:46:02,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2229, PETRI_PLACES=193, PETRI_TRANSITIONS=232} [2024-06-03 19:46:02,972 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-03 19:46:02,972 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 232 transitions, 2229 flow [2024-06-03 19:46:02,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:02,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:02,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:02,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:46:02,973 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:02,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:02,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1753271324, now seen corresponding path program 1 times [2024-06-03 19:46:02,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:02,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963497372] [2024-06-03 19:46:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:02,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:03,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:03,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963497372] [2024-06-03 19:46:03,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963497372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:03,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:03,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:03,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108468792] [2024-06-03 19:46:03,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:03,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:03,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:03,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:03,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:03,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:46:03,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 232 transitions, 2229 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:03,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:03,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:46:03,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:04,563 INFO L124 PetriNetUnfolderBase]: 2174/3505 cut-off events. [2024-06-03 19:46:04,563 INFO L125 PetriNetUnfolderBase]: For 298490/298492 co-relation queries the response was YES. [2024-06-03 19:46:04,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28956 conditions, 3505 events. 2174/3505 cut-off events. For 298490/298492 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19828 event pairs, 442 based on Foata normal form. 12/3512 useless extension candidates. Maximal degree in co-relation 28865. Up to 3000 conditions per place. [2024-06-03 19:46:04,597 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 219 selfloop transitions, 25 changer transitions 0/267 dead transitions. [2024-06-03 19:46:04,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 267 transitions, 2907 flow [2024-06-03 19:46:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-03 19:46:04,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-03 19:46:04,599 INFO L175 Difference]: Start difference. First operand has 193 places, 232 transitions, 2229 flow. Second operand 8 states and 164 transitions. [2024-06-03 19:46:04,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 267 transitions, 2907 flow [2024-06-03 19:46:04,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 267 transitions, 2739 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-03 19:46:04,804 INFO L231 Difference]: Finished difference. Result has 193 places, 236 transitions, 2210 flow [2024-06-03 19:46:04,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2210, PETRI_PLACES=193, PETRI_TRANSITIONS=236} [2024-06-03 19:46:04,804 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-03 19:46:04,804 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 236 transitions, 2210 flow [2024-06-03 19:46:04,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:04,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:04,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:04,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:46:04,805 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:04,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:04,805 INFO L85 PathProgramCache]: Analyzing trace with hash -337339762, now seen corresponding path program 2 times [2024-06-03 19:46:04,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:04,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356896383] [2024-06-03 19:46:04,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:04,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:05,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:05,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356896383] [2024-06-03 19:46:05,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356896383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:05,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:05,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:05,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579052838] [2024-06-03 19:46:05,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:05,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:05,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:05,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:05,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:05,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:46:05,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 236 transitions, 2210 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:05,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:05,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:46:05,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:06,375 INFO L124 PetriNetUnfolderBase]: 2216/3571 cut-off events. [2024-06-03 19:46:06,375 INFO L125 PetriNetUnfolderBase]: For 314197/314199 co-relation queries the response was YES. [2024-06-03 19:46:06,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30011 conditions, 3571 events. 2216/3571 cut-off events. For 314197/314199 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20281 event pairs, 583 based on Foata normal form. 14/3580 useless extension candidates. Maximal degree in co-relation 29919. Up to 3099 conditions per place. [2024-06-03 19:46:06,413 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 218 selfloop transitions, 26 changer transitions 0/267 dead transitions. [2024-06-03 19:46:06,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 267 transitions, 2890 flow [2024-06-03 19:46:06,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-03 19:46:06,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-03 19:46:06,415 INFO L175 Difference]: Start difference. First operand has 193 places, 236 transitions, 2210 flow. Second operand 8 states and 163 transitions. [2024-06-03 19:46:06,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 267 transitions, 2890 flow [2024-06-03 19:46:06,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 267 transitions, 2789 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 19:46:06,696 INFO L231 Difference]: Finished difference. Result has 196 places, 238 transitions, 2241 flow [2024-06-03 19:46:06,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2241, PETRI_PLACES=196, PETRI_TRANSITIONS=238} [2024-06-03 19:46:06,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-03 19:46:06,696 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 238 transitions, 2241 flow [2024-06-03 19:46:06,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:06,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:06,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:06,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:46:06,697 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:06,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:06,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1744689532, now seen corresponding path program 1 times [2024-06-03 19:46:06,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:06,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98815926] [2024-06-03 19:46:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:06,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:07,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:07,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98815926] [2024-06-03 19:46:07,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98815926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:07,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:07,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:07,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390616088] [2024-06-03 19:46:07,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:07,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:07,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:07,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:07,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:07,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:07,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 238 transitions, 2241 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:07,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:07,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:07,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:08,310 INFO L124 PetriNetUnfolderBase]: 2303/3668 cut-off events. [2024-06-03 19:46:08,310 INFO L125 PetriNetUnfolderBase]: For 309982/309984 co-relation queries the response was YES. [2024-06-03 19:46:08,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30721 conditions, 3668 events. 2303/3668 cut-off events. For 309982/309984 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20560 event pairs, 614 based on Foata normal form. 5/3672 useless extension candidates. Maximal degree in co-relation 30628. Up to 3366 conditions per place. [2024-06-03 19:46:08,346 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 232 selfloop transitions, 32 changer transitions 0/269 dead transitions. [2024-06-03 19:46:08,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 269 transitions, 2957 flow [2024-06-03 19:46:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:46:08,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:46:08,348 INFO L175 Difference]: Start difference. First operand has 196 places, 238 transitions, 2241 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:46:08,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 269 transitions, 2957 flow [2024-06-03 19:46:08,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 269 transitions, 2857 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:46:08,563 INFO L231 Difference]: Finished difference. Result has 199 places, 242 transitions, 2318 flow [2024-06-03 19:46:08,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2318, PETRI_PLACES=199, PETRI_TRANSITIONS=242} [2024-06-03 19:46:08,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-03 19:46:08,563 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 242 transitions, 2318 flow [2024-06-03 19:46:08,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:08,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:08,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:08,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:46:08,564 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:08,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:08,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1457813114, now seen corresponding path program 3 times [2024-06-03 19:46:08,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:08,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969457693] [2024-06-03 19:46:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:08,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:09,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:09,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969457693] [2024-06-03 19:46:09,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969457693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:09,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:09,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:09,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716113935] [2024-06-03 19:46:09,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:09,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:09,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:09,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:09,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:09,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:46:09,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 242 transitions, 2318 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:09,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:09,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:46:09,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:10,092 INFO L124 PetriNetUnfolderBase]: 2281/3676 cut-off events. [2024-06-03 19:46:10,092 INFO L125 PetriNetUnfolderBase]: For 342496/342518 co-relation queries the response was YES. [2024-06-03 19:46:10,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31596 conditions, 3676 events. 2281/3676 cut-off events. For 342496/342518 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21072 event pairs, 580 based on Foata normal form. 18/3675 useless extension candidates. Maximal degree in co-relation 31502. Up to 3144 conditions per place. [2024-06-03 19:46:10,130 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 207 selfloop transitions, 38 changer transitions 0/268 dead transitions. [2024-06-03 19:46:10,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 268 transitions, 3004 flow [2024-06-03 19:46:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:46:10,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-03 19:46:10,131 INFO L175 Difference]: Start difference. First operand has 199 places, 242 transitions, 2318 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:46:10,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 268 transitions, 3004 flow [2024-06-03 19:46:10,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 268 transitions, 2855 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-03 19:46:10,371 INFO L231 Difference]: Finished difference. Result has 200 places, 244 transitions, 2331 flow [2024-06-03 19:46:10,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2331, PETRI_PLACES=200, PETRI_TRANSITIONS=244} [2024-06-03 19:46:10,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-03 19:46:10,372 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 244 transitions, 2331 flow [2024-06-03 19:46:10,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:10,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:10,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:10,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:46:10,372 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:10,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:10,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1634941472, now seen corresponding path program 1 times [2024-06-03 19:46:10,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:10,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586291409] [2024-06-03 19:46:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:10,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:11,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:11,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586291409] [2024-06-03 19:46:11,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586291409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:11,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:11,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:11,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420382156] [2024-06-03 19:46:11,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:11,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:11,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:11,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:11,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:11,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:46:11,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 244 transitions, 2331 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:11,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:11,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:46:11,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:12,125 INFO L124 PetriNetUnfolderBase]: 2282/3668 cut-off events. [2024-06-03 19:46:12,125 INFO L125 PetriNetUnfolderBase]: For 333994/333996 co-relation queries the response was YES. [2024-06-03 19:46:12,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31801 conditions, 3668 events. 2282/3668 cut-off events. For 333994/333996 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20897 event pairs, 598 based on Foata normal form. 2/3664 useless extension candidates. Maximal degree in co-relation 31706. Up to 3175 conditions per place. [2024-06-03 19:46:12,161 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 211 selfloop transitions, 37 changer transitions 0/271 dead transitions. [2024-06-03 19:46:12,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 271 transitions, 2989 flow [2024-06-03 19:46:12,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:12,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 19:46:12,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-03 19:46:12,163 INFO L175 Difference]: Start difference. First operand has 200 places, 244 transitions, 2331 flow. Second operand 8 states and 161 transitions. [2024-06-03 19:46:12,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 271 transitions, 2989 flow [2024-06-03 19:46:12,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 271 transitions, 2861 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 19:46:12,409 INFO L231 Difference]: Finished difference. Result has 202 places, 248 transitions, 2396 flow [2024-06-03 19:46:12,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2203, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2396, PETRI_PLACES=202, PETRI_TRANSITIONS=248} [2024-06-03 19:46:12,409 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-03 19:46:12,410 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 248 transitions, 2396 flow [2024-06-03 19:46:12,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:12,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:12,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:12,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:46:12,410 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:12,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:12,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1634821316, now seen corresponding path program 1 times [2024-06-03 19:46:12,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:12,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207042623] [2024-06-03 19:46:12,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:12,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:13,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:13,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207042623] [2024-06-03 19:46:13,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207042623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:13,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:13,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:13,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633997247] [2024-06-03 19:46:13,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:13,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:13,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:13,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:13,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:13,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:13,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 248 transitions, 2396 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:13,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:13,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:13,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:13,903 INFO L124 PetriNetUnfolderBase]: 2377/3778 cut-off events. [2024-06-03 19:46:13,903 INFO L125 PetriNetUnfolderBase]: For 347329/347331 co-relation queries the response was YES. [2024-06-03 19:46:13,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32848 conditions, 3778 events. 2377/3778 cut-off events. For 347329/347331 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21246 event pairs, 618 based on Foata normal form. 6/3783 useless extension candidates. Maximal degree in co-relation 32752. Up to 3479 conditions per place. [2024-06-03 19:46:13,937 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 242 selfloop transitions, 27 changer transitions 0/274 dead transitions. [2024-06-03 19:46:13,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 274 transitions, 3075 flow [2024-06-03 19:46:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:46:13,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:46:13,938 INFO L175 Difference]: Start difference. First operand has 202 places, 248 transitions, 2396 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:46:13,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 274 transitions, 3075 flow [2024-06-03 19:46:14,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 274 transitions, 2893 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-03 19:46:14,165 INFO L231 Difference]: Finished difference. Result has 203 places, 252 transitions, 2354 flow [2024-06-03 19:46:14,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2354, PETRI_PLACES=203, PETRI_TRANSITIONS=252} [2024-06-03 19:46:14,166 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-03 19:46:14,166 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 252 transitions, 2354 flow [2024-06-03 19:46:14,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:14,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:14,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:14,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:46:14,166 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:14,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash -50329114, now seen corresponding path program 2 times [2024-06-03 19:46:14,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:14,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441649729] [2024-06-03 19:46:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:14,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:14,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:14,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441649729] [2024-06-03 19:46:14,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441649729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:14,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:14,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:14,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835307906] [2024-06-03 19:46:14,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:14,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:14,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:14,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:14,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:14,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:14,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 252 transitions, 2354 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:14,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:14,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:14,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:15,597 INFO L124 PetriNetUnfolderBase]: 2413/3842 cut-off events. [2024-06-03 19:46:15,598 INFO L125 PetriNetUnfolderBase]: For 362762/362764 co-relation queries the response was YES. [2024-06-03 19:46:15,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33460 conditions, 3842 events. 2413/3842 cut-off events. For 362762/362764 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21730 event pairs, 620 based on Foata normal form. 6/3847 useless extension candidates. Maximal degree in co-relation 33363. Up to 3376 conditions per place. [2024-06-03 19:46:15,635 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 219 selfloop transitions, 57 changer transitions 0/281 dead transitions. [2024-06-03 19:46:15,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 281 transitions, 3368 flow [2024-06-03 19:46:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:15,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:46:15,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-03 19:46:15,636 INFO L175 Difference]: Start difference. First operand has 203 places, 252 transitions, 2354 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:46:15,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 281 transitions, 3368 flow [2024-06-03 19:46:15,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 281 transitions, 3273 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 19:46:15,886 INFO L231 Difference]: Finished difference. Result has 205 places, 259 transitions, 2528 flow [2024-06-03 19:46:15,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2528, PETRI_PLACES=205, PETRI_TRANSITIONS=259} [2024-06-03 19:46:15,887 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-03 19:46:15,887 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 259 transitions, 2528 flow [2024-06-03 19:46:15,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:15,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:15,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:15,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:46:15,887 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:15,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:15,888 INFO L85 PathProgramCache]: Analyzing trace with hash -50091964, now seen corresponding path program 3 times [2024-06-03 19:46:15,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:15,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067956332] [2024-06-03 19:46:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:15,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:16,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:16,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067956332] [2024-06-03 19:46:16,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067956332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:16,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:16,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:16,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455829403] [2024-06-03 19:46:16,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:16,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:16,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:16,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:16,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:16,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:16,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 259 transitions, 2528 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:16,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:16,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:16,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:17,399 INFO L124 PetriNetUnfolderBase]: 2401/3820 cut-off events. [2024-06-03 19:46:17,399 INFO L125 PetriNetUnfolderBase]: For 365723/365725 co-relation queries the response was YES. [2024-06-03 19:46:17,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33295 conditions, 3820 events. 2401/3820 cut-off events. For 365723/365725 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21565 event pairs, 605 based on Foata normal form. 6/3825 useless extension candidates. Maximal degree in co-relation 33197. Up to 3368 conditions per place. [2024-06-03 19:46:17,439 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 218 selfloop transitions, 57 changer transitions 0/280 dead transitions. [2024-06-03 19:46:17,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 280 transitions, 3274 flow [2024-06-03 19:46:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:46:17,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:46:17,440 INFO L175 Difference]: Start difference. First operand has 205 places, 259 transitions, 2528 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:46:17,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 280 transitions, 3274 flow [2024-06-03 19:46:17,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 280 transitions, 3108 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-03 19:46:17,789 INFO L231 Difference]: Finished difference. Result has 209 places, 259 transitions, 2486 flow [2024-06-03 19:46:17,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2362, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2486, PETRI_PLACES=209, PETRI_TRANSITIONS=259} [2024-06-03 19:46:17,790 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-03 19:46:17,790 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 259 transitions, 2486 flow [2024-06-03 19:46:17,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:17,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:17,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:17,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:46:17,791 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:17,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:17,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1457802202, now seen corresponding path program 2 times [2024-06-03 19:46:17,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:17,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77681330] [2024-06-03 19:46:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:17,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:18,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:18,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77681330] [2024-06-03 19:46:18,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77681330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:18,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:18,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:18,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039950612] [2024-06-03 19:46:18,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:18,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:18,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:18,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:18,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:18,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:18,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 259 transitions, 2486 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:18,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:18,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:18,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:19,452 INFO L124 PetriNetUnfolderBase]: 2472/3924 cut-off events. [2024-06-03 19:46:19,452 INFO L125 PetriNetUnfolderBase]: For 389114/389116 co-relation queries the response was YES. [2024-06-03 19:46:19,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34591 conditions, 3924 events. 2472/3924 cut-off events. For 389114/389116 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22167 event pairs, 624 based on Foata normal form. 5/3928 useless extension candidates. Maximal degree in co-relation 34492. Up to 3363 conditions per place. [2024-06-03 19:46:19,493 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 221 selfloop transitions, 69 changer transitions 0/295 dead transitions. [2024-06-03 19:46:19,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 295 transitions, 3720 flow [2024-06-03 19:46:19,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:19,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:46:19,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:46:19,494 INFO L175 Difference]: Start difference. First operand has 209 places, 259 transitions, 2486 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:46:19,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 295 transitions, 3720 flow [2024-06-03 19:46:19,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 295 transitions, 3628 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 19:46:19,795 INFO L231 Difference]: Finished difference. Result has 213 places, 271 transitions, 2910 flow [2024-06-03 19:46:19,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2394, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2910, PETRI_PLACES=213, PETRI_TRANSITIONS=271} [2024-06-03 19:46:19,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-03 19:46:19,796 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 271 transitions, 2910 flow [2024-06-03 19:46:19,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:19,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:19,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:19,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:46:19,797 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:19,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:19,797 INFO L85 PathProgramCache]: Analyzing trace with hash -50083470, now seen corresponding path program 3 times [2024-06-03 19:46:19,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:19,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304370183] [2024-06-03 19:46:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:19,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:20,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:20,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304370183] [2024-06-03 19:46:20,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304370183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:20,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:20,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:20,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359413712] [2024-06-03 19:46:20,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:20,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:20,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:20,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:20,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:20,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:20,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 271 transitions, 2910 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:20,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:20,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:20,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:21,437 INFO L124 PetriNetUnfolderBase]: 2491/3953 cut-off events. [2024-06-03 19:46:21,438 INFO L125 PetriNetUnfolderBase]: For 406788/406790 co-relation queries the response was YES. [2024-06-03 19:46:21,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35835 conditions, 3953 events. 2491/3953 cut-off events. For 406788/406790 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22314 event pairs, 605 based on Foata normal form. 5/3957 useless extension candidates. Maximal degree in co-relation 35734. Up to 3382 conditions per place. [2024-06-03 19:46:21,479 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 223 selfloop transitions, 71 changer transitions 0/299 dead transitions. [2024-06-03 19:46:21,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 299 transitions, 3959 flow [2024-06-03 19:46:21,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:21,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:46:21,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:46:21,480 INFO L175 Difference]: Start difference. First operand has 213 places, 271 transitions, 2910 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:46:21,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 299 transitions, 3959 flow [2024-06-03 19:46:21,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 299 transitions, 3785 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-03 19:46:21,802 INFO L231 Difference]: Finished difference. Result has 218 places, 275 transitions, 3009 flow [2024-06-03 19:46:21,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3009, PETRI_PLACES=218, PETRI_TRANSITIONS=275} [2024-06-03 19:46:21,803 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-03 19:46:21,803 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 275 transitions, 3009 flow [2024-06-03 19:46:21,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:21,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:21,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:21,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:46:21,804 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:21,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:21,805 INFO L85 PathProgramCache]: Analyzing trace with hash -50083036, now seen corresponding path program 1 times [2024-06-03 19:46:21,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:21,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563244834] [2024-06-03 19:46:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:21,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:22,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:22,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563244834] [2024-06-03 19:46:22,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563244834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:22,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:22,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:22,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648137748] [2024-06-03 19:46:22,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:22,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:22,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:22,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:22,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:22,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:22,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 275 transitions, 3009 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:22,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:22,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:22,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:23,359 INFO L124 PetriNetUnfolderBase]: 2496/3951 cut-off events. [2024-06-03 19:46:23,360 INFO L125 PetriNetUnfolderBase]: For 412291/412291 co-relation queries the response was YES. [2024-06-03 19:46:23,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36123 conditions, 3951 events. 2496/3951 cut-off events. For 412291/412291 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22245 event pairs, 640 based on Foata normal form. 1/3951 useless extension candidates. Maximal degree in co-relation 36020. Up to 3726 conditions per place. [2024-06-03 19:46:23,405 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 271 selfloop transitions, 20 changer transitions 0/296 dead transitions. [2024-06-03 19:46:23,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 296 transitions, 3739 flow [2024-06-03 19:46:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 19:46:23,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-03 19:46:23,407 INFO L175 Difference]: Start difference. First operand has 218 places, 275 transitions, 3009 flow. Second operand 9 states and 154 transitions. [2024-06-03 19:46:23,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 296 transitions, 3739 flow [2024-06-03 19:46:23,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 296 transitions, 3494 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-03 19:46:23,761 INFO L231 Difference]: Finished difference. Result has 220 places, 278 transitions, 2920 flow [2024-06-03 19:46:23,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2764, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2920, PETRI_PLACES=220, PETRI_TRANSITIONS=278} [2024-06-03 19:46:23,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-03 19:46:23,761 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 278 transitions, 2920 flow [2024-06-03 19:46:23,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:23,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:23,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:23,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:46:23,762 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:23,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:23,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1528974524, now seen corresponding path program 4 times [2024-06-03 19:46:23,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:23,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515432185] [2024-06-03 19:46:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:23,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:24,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:24,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515432185] [2024-06-03 19:46:24,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515432185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:24,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:24,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:24,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50146352] [2024-06-03 19:46:24,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:24,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:24,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:24,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:24,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:24,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:24,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 278 transitions, 2920 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:24,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:24,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:24,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:25,498 INFO L124 PetriNetUnfolderBase]: 2491/3954 cut-off events. [2024-06-03 19:46:25,498 INFO L125 PetriNetUnfolderBase]: For 413512/413514 co-relation queries the response was YES. [2024-06-03 19:46:25,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35784 conditions, 3954 events. 2491/3954 cut-off events. For 413512/413514 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22312 event pairs, 604 based on Foata normal form. 5/3958 useless extension candidates. Maximal degree in co-relation 35681. Up to 3387 conditions per place. [2024-06-03 19:46:25,542 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 225 selfloop transitions, 71 changer transitions 0/301 dead transitions. [2024-06-03 19:46:25,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 301 transitions, 3728 flow [2024-06-03 19:46:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:46:25,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:46:25,543 INFO L175 Difference]: Start difference. First operand has 220 places, 278 transitions, 2920 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:46:25,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 301 transitions, 3728 flow [2024-06-03 19:46:25,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 301 transitions, 3516 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-03 19:46:25,957 INFO L231 Difference]: Finished difference. Result has 222 places, 278 transitions, 2857 flow [2024-06-03 19:46:25,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2857, PETRI_PLACES=222, PETRI_TRANSITIONS=278} [2024-06-03 19:46:25,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-03 19:46:25,958 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 278 transitions, 2857 flow [2024-06-03 19:46:25,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:25,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:25,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:25,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:46:25,959 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:25,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1470740592, now seen corresponding path program 4 times [2024-06-03 19:46:25,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:25,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475167540] [2024-06-03 19:46:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:25,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:26,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:26,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475167540] [2024-06-03 19:46:26,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475167540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:26,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:26,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:26,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191775818] [2024-06-03 19:46:26,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:26,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:26,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:26,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:26,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:26,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:46:26,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 278 transitions, 2857 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:26,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:26,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:46:26,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:27,531 INFO L124 PetriNetUnfolderBase]: 2415/3913 cut-off events. [2024-06-03 19:46:27,531 INFO L125 PetriNetUnfolderBase]: For 443412/443422 co-relation queries the response was YES. [2024-06-03 19:46:27,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35656 conditions, 3913 events. 2415/3913 cut-off events. For 443412/443422 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22917 event pairs, 604 based on Foata normal form. 22/3901 useless extension candidates. Maximal degree in co-relation 35552. Up to 3279 conditions per place. [2024-06-03 19:46:27,572 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 218 selfloop transitions, 55 changer transitions 0/299 dead transitions. [2024-06-03 19:46:27,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 299 transitions, 3611 flow [2024-06-03 19:46:27,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:46:27,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-03 19:46:27,574 INFO L175 Difference]: Start difference. First operand has 222 places, 278 transitions, 2857 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:46:27,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 299 transitions, 3611 flow [2024-06-03 19:46:27,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 299 transitions, 3479 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 19:46:27,995 INFO L231 Difference]: Finished difference. Result has 223 places, 280 transitions, 2931 flow [2024-06-03 19:46:28,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2725, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2931, PETRI_PLACES=223, PETRI_TRANSITIONS=280} [2024-06-03 19:46:28,002 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-03 19:46:28,002 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 280 transitions, 2931 flow [2024-06-03 19:46:28,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:28,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:28,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:28,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:46:28,003 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)] === [2024-06-03 19:46:28,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:28,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1102031348, now seen corresponding path program 2 times [2024-06-03 19:46:28,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:28,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558504087] [2024-06-03 19:46:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:28,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:28,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:28,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558504087] [2024-06-03 19:46:28,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558504087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:28,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:28,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:28,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567238984] [2024-06-03 19:46:28,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:28,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:28,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:28,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:28,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:28,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:46:28,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 280 transitions, 2931 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:28,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:28,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:46:28,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:29,772 INFO L124 PetriNetUnfolderBase]: 2429/3891 cut-off events. [2024-06-03 19:46:29,772 INFO L125 PetriNetUnfolderBase]: For 431592/431592 co-relation queries the response was YES. [2024-06-03 19:46:29,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36066 conditions, 3891 events. 2429/3891 cut-off events. For 431592/431592 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22331 event pairs, 631 based on Foata normal form. 1/3884 useless extension candidates. Maximal degree in co-relation 35961. Up to 3385 conditions per place. [2024-06-03 19:46:29,887 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 238 selfloop transitions, 39 changer transitions 0/303 dead transitions. [2024-06-03 19:46:29,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 303 transitions, 3637 flow [2024-06-03 19:46:29,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:46:29,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-03 19:46:29,889 INFO L175 Difference]: Start difference. First operand has 223 places, 280 transitions, 2931 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:46:29,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 303 transitions, 3637 flow [2024-06-03 19:46:30,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 303 transitions, 3469 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:46:30,305 INFO L231 Difference]: Finished difference. Result has 225 places, 283 transitions, 2955 flow [2024-06-03 19:46:30,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2763, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2955, PETRI_PLACES=225, PETRI_TRANSITIONS=283} [2024-06-03 19:46:30,306 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-03 19:46:30,306 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 283 transitions, 2955 flow [2024-06-03 19:46:30,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:30,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:30,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:30,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:46:30,307 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)] === [2024-06-03 19:46:30,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:30,307 INFO L85 PathProgramCache]: Analyzing trace with hash -61821500, now seen corresponding path program 4 times [2024-06-03 19:46:30,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:30,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134229446] [2024-06-03 19:46:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:30,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:31,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:31,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134229446] [2024-06-03 19:46:31,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134229446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:31,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:31,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:31,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541081945] [2024-06-03 19:46:31,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:31,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:31,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:31,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:31,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:31,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:31,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 283 transitions, 2955 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:31,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:31,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:31,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:31,987 INFO L124 PetriNetUnfolderBase]: 2513/3975 cut-off events. [2024-06-03 19:46:31,987 INFO L125 PetriNetUnfolderBase]: For 437409/437409 co-relation queries the response was YES. [2024-06-03 19:46:32,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36471 conditions, 3975 events. 2513/3975 cut-off events. For 437409/437409 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22370 event pairs, 660 based on Foata normal form. 2/3973 useless extension candidates. Maximal degree in co-relation 36365. Up to 3689 conditions per place. [2024-06-03 19:46:32,026 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 271 selfloop transitions, 26 changer transitions 0/302 dead transitions. [2024-06-03 19:46:32,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 302 transitions, 3611 flow [2024-06-03 19:46:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:46:32,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:46:32,027 INFO L175 Difference]: Start difference. First operand has 225 places, 283 transitions, 2955 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:46:32,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 302 transitions, 3611 flow [2024-06-03 19:46:32,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 302 transitions, 3411 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-03 19:46:32,551 INFO L231 Difference]: Finished difference. Result has 227 places, 283 transitions, 2813 flow [2024-06-03 19:46:32,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2813, PETRI_PLACES=227, PETRI_TRANSITIONS=283} [2024-06-03 19:46:32,552 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-03 19:46:32,552 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 283 transitions, 2813 flow [2024-06-03 19:46:32,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:32,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:32,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:32,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:46:32,553 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)] === [2024-06-03 19:46:32,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:32,553 INFO L85 PathProgramCache]: Analyzing trace with hash -78233186, now seen corresponding path program 3 times [2024-06-03 19:46:32,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:32,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175351890] [2024-06-03 19:46:32,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:32,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:33,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:33,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175351890] [2024-06-03 19:46:33,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175351890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:33,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:33,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:33,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546175952] [2024-06-03 19:46:33,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:33,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:33,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:33,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:33,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:33,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:46:33,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 283 transitions, 2813 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:33,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:33,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:46:33,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:34,347 INFO L124 PetriNetUnfolderBase]: 2422/3880 cut-off events. [2024-06-03 19:46:34,347 INFO L125 PetriNetUnfolderBase]: For 447916/447916 co-relation queries the response was YES. [2024-06-03 19:46:34,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36063 conditions, 3880 events. 2422/3880 cut-off events. For 447916/447916 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22255 event pairs, 630 based on Foata normal form. 1/3873 useless extension candidates. Maximal degree in co-relation 35956. Up to 3378 conditions per place. [2024-06-03 19:46:34,389 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 240 selfloop transitions, 40 changer transitions 0/306 dead transitions. [2024-06-03 19:46:34,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 306 transitions, 3531 flow [2024-06-03 19:46:34,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:34,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:46:34,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-03 19:46:34,392 INFO L175 Difference]: Start difference. First operand has 227 places, 283 transitions, 2813 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:46:34,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 306 transitions, 3531 flow [2024-06-03 19:46:34,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 306 transitions, 3330 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-03 19:46:34,784 INFO L231 Difference]: Finished difference. Result has 225 places, 286 transitions, 2812 flow [2024-06-03 19:46:34,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2812, PETRI_PLACES=225, PETRI_TRANSITIONS=286} [2024-06-03 19:46:34,786 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-03 19:46:34,786 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 286 transitions, 2812 flow [2024-06-03 19:46:34,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:34,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:34,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:34,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:46:34,787 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)] === [2024-06-03 19:46:34,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:34,787 INFO L85 PathProgramCache]: Analyzing trace with hash -66805346, now seen corresponding path program 4 times [2024-06-03 19:46:34,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:34,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094005880] [2024-06-03 19:46:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:34,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:35,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:35,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094005880] [2024-06-03 19:46:35,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094005880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:35,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:35,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:35,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216578166] [2024-06-03 19:46:35,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:35,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:35,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:35,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:35,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:35,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:46:35,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 286 transitions, 2812 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:35,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:35,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:46:35,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:36,581 INFO L124 PetriNetUnfolderBase]: 2419/3876 cut-off events. [2024-06-03 19:46:36,581 INFO L125 PetriNetUnfolderBase]: For 459056/459056 co-relation queries the response was YES. [2024-06-03 19:46:36,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36318 conditions, 3876 events. 2419/3876 cut-off events. For 459056/459056 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22239 event pairs, 630 based on Foata normal form. 1/3869 useless extension candidates. Maximal degree in co-relation 36210. Up to 3359 conditions per place. [2024-06-03 19:46:36,624 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 228 selfloop transitions, 52 changer transitions 0/306 dead transitions. [2024-06-03 19:46:36,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 306 transitions, 3528 flow [2024-06-03 19:46:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:36,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:46:36,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-03 19:46:36,626 INFO L175 Difference]: Start difference. First operand has 225 places, 286 transitions, 2812 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:46:36,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 306 transitions, 3528 flow [2024-06-03 19:46:37,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 306 transitions, 3350 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-03 19:46:37,120 INFO L231 Difference]: Finished difference. Result has 227 places, 289 transitions, 2864 flow [2024-06-03 19:46:37,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2864, PETRI_PLACES=227, PETRI_TRANSITIONS=289} [2024-06-03 19:46:37,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-03 19:46:37,122 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 289 transitions, 2864 flow [2024-06-03 19:46:37,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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) [2024-06-03 19:46:37,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:37,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:37,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:46:37,122 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)] === [2024-06-03 19:46:37,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:37,123 INFO L85 PathProgramCache]: Analyzing trace with hash -234977054, now seen corresponding path program 5 times [2024-06-03 19:46:37,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:37,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123359138] [2024-06-03 19:46:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:37,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:37,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:37,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123359138] [2024-06-03 19:46:37,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123359138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:37,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:37,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:37,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962954786] [2024-06-03 19:46:37,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:37,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:37,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:37,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:37,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:37,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:37,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 289 transitions, 2864 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:37,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:37,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:37,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:38,709 INFO L124 PetriNetUnfolderBase]: 2541/4032 cut-off events. [2024-06-03 19:46:38,709 INFO L125 PetriNetUnfolderBase]: For 479145/479145 co-relation queries the response was YES. [2024-06-03 19:46:38,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37702 conditions, 4032 events. 2541/4032 cut-off events. For 479145/479145 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22889 event pairs, 633 based on Foata normal form. 2/4030 useless extension candidates. Maximal degree in co-relation 37593. Up to 3659 conditions per place. [2024-06-03 19:46:38,753 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 261 selfloop transitions, 47 changer transitions 0/313 dead transitions. [2024-06-03 19:46:38,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 313 transitions, 3812 flow [2024-06-03 19:46:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:38,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:46:38,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:46:38,755 INFO L175 Difference]: Start difference. First operand has 227 places, 289 transitions, 2864 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:46:38,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 313 transitions, 3812 flow [2024-06-03 19:46:39,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 313 transitions, 3604 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-03 19:46:39,250 INFO L231 Difference]: Finished difference. Result has 230 places, 295 transitions, 2909 flow [2024-06-03 19:46:39,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2909, PETRI_PLACES=230, PETRI_TRANSITIONS=295} [2024-06-03 19:46:39,251 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-03 19:46:39,251 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 295 transitions, 2909 flow [2024-06-03 19:46:39,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:39,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:39,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:39,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:46:39,252 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:39,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash 48248860, now seen corresponding path program 6 times [2024-06-03 19:46:39,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:39,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090396394] [2024-06-03 19:46:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:39,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:39,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:39,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090396394] [2024-06-03 19:46:39,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090396394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:39,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:39,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:39,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946136032] [2024-06-03 19:46:39,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:39,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:39,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:39,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:39,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:40,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:40,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 295 transitions, 2909 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:40,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:40,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:40,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:40,798 INFO L124 PetriNetUnfolderBase]: 2535/4024 cut-off events. [2024-06-03 19:46:40,799 INFO L125 PetriNetUnfolderBase]: For 484880/484880 co-relation queries the response was YES. [2024-06-03 19:46:40,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37656 conditions, 4024 events. 2535/4024 cut-off events. For 484880/484880 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22816 event pairs, 640 based on Foata normal form. 2/4022 useless extension candidates. Maximal degree in co-relation 37545. Up to 3654 conditions per place. [2024-06-03 19:46:40,844 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 262 selfloop transitions, 45 changer transitions 0/312 dead transitions. [2024-06-03 19:46:40,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 312 transitions, 3587 flow [2024-06-03 19:46:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:46:40,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 19:46:40,845 INFO L175 Difference]: Start difference. First operand has 230 places, 295 transitions, 2909 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:46:40,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 312 transitions, 3587 flow [2024-06-03 19:46:41,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 312 transitions, 3432 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-03 19:46:41,396 INFO L231 Difference]: Finished difference. Result has 233 places, 295 transitions, 2850 flow [2024-06-03 19:46:41,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2850, PETRI_PLACES=233, PETRI_TRANSITIONS=295} [2024-06-03 19:46:41,396 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-03 19:46:41,397 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 295 transitions, 2850 flow [2024-06-03 19:46:41,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:41,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:41,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:41,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:46:41,397 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:41,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:41,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1641572850, now seen corresponding path program 7 times [2024-06-03 19:46:41,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:41,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148845998] [2024-06-03 19:46:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:41,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:42,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:42,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148845998] [2024-06-03 19:46:42,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148845998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:42,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:42,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:42,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012351536] [2024-06-03 19:46:42,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:42,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:42,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:42,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:42,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:42,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:42,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 295 transitions, 2850 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:42,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:42,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:42,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:43,066 INFO L124 PetriNetUnfolderBase]: 2555/4074 cut-off events. [2024-06-03 19:46:43,066 INFO L125 PetriNetUnfolderBase]: For 501794/501796 co-relation queries the response was YES. [2024-06-03 19:46:43,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37967 conditions, 4074 events. 2555/4074 cut-off events. For 501794/501796 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23304 event pairs, 634 based on Foata normal form. 6/4076 useless extension candidates. Maximal degree in co-relation 37855. Up to 3366 conditions per place. [2024-06-03 19:46:43,111 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 212 selfloop transitions, 99 changer transitions 0/316 dead transitions. [2024-06-03 19:46:43,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 316 transitions, 3913 flow [2024-06-03 19:46:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:46:43,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-03 19:46:43,113 INFO L175 Difference]: Start difference. First operand has 233 places, 295 transitions, 2850 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:46:43,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 316 transitions, 3913 flow [2024-06-03 19:46:43,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 316 transitions, 3806 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:46:43,785 INFO L231 Difference]: Finished difference. Result has 234 places, 299 transitions, 3031 flow [2024-06-03 19:46:43,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2743, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3031, PETRI_PLACES=234, PETRI_TRANSITIONS=299} [2024-06-03 19:46:43,786 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-03 19:46:43,786 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 299 transitions, 3031 flow [2024-06-03 19:46:43,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:43,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:43,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:43,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:46:43,787 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:43,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:43,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1470863910, now seen corresponding path program 8 times [2024-06-03 19:46:43,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:43,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793702197] [2024-06-03 19:46:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:43,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:44,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:44,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793702197] [2024-06-03 19:46:44,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793702197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:44,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:44,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:44,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317070636] [2024-06-03 19:46:44,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:44,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:44,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:44,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:44,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:44,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:44,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 299 transitions, 3031 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:44,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:44,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:44,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:45,379 INFO L124 PetriNetUnfolderBase]: 2575/4102 cut-off events. [2024-06-03 19:46:45,380 INFO L125 PetriNetUnfolderBase]: For 516382/516384 co-relation queries the response was YES. [2024-06-03 19:46:45,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38695 conditions, 4102 events. 2575/4102 cut-off events. For 516382/516384 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23509 event pairs, 634 based on Foata normal form. 6/4104 useless extension candidates. Maximal degree in co-relation 38582. Up to 3376 conditions per place. [2024-06-03 19:46:45,423 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 211 selfloop transitions, 106 changer transitions 0/322 dead transitions. [2024-06-03 19:46:45,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 322 transitions, 4177 flow [2024-06-03 19:46:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:45,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:46:45,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-03 19:46:45,425 INFO L175 Difference]: Start difference. First operand has 234 places, 299 transitions, 3031 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:46:45,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 322 transitions, 4177 flow [2024-06-03 19:46:45,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 322 transitions, 3947 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 19:46:45,938 INFO L231 Difference]: Finished difference. Result has 238 places, 305 transitions, 3189 flow [2024-06-03 19:46:45,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3189, PETRI_PLACES=238, PETRI_TRANSITIONS=305} [2024-06-03 19:46:45,938 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-03 19:46:45,939 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 305 transitions, 3189 flow [2024-06-03 19:46:45,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:45,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:45,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:45,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:46:45,939 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:45,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:45,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1648411140, now seen corresponding path program 9 times [2024-06-03 19:46:45,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:45,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099065344] [2024-06-03 19:46:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:45,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:46,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:46,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099065344] [2024-06-03 19:46:46,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099065344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:46,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:46,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:46,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248229947] [2024-06-03 19:46:46,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:46,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:46,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:46,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:46,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:46,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:46,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 305 transitions, 3189 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:46,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:46,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:46,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:47,580 INFO L124 PetriNetUnfolderBase]: 2585/4116 cut-off events. [2024-06-03 19:46:47,580 INFO L125 PetriNetUnfolderBase]: For 522023/522025 co-relation queries the response was YES. [2024-06-03 19:46:47,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39019 conditions, 4116 events. 2585/4116 cut-off events. For 522023/522025 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 23599 event pairs, 648 based on Foata normal form. 4/4116 useless extension candidates. Maximal degree in co-relation 38904. Up to 3382 conditions per place. [2024-06-03 19:46:47,631 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 199 selfloop transitions, 121 changer transitions 0/325 dead transitions. [2024-06-03 19:46:47,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 325 transitions, 4272 flow [2024-06-03 19:46:47,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:46:47,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:46:47,633 INFO L175 Difference]: Start difference. First operand has 238 places, 305 transitions, 3189 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:46:47,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 325 transitions, 4272 flow [2024-06-03 19:46:48,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 325 transitions, 4063 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 19:46:48,193 INFO L231 Difference]: Finished difference. Result has 242 places, 308 transitions, 3301 flow [2024-06-03 19:46:48,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3301, PETRI_PLACES=242, PETRI_TRANSITIONS=308} [2024-06-03 19:46:48,193 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-03 19:46:48,194 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 308 transitions, 3301 flow [2024-06-03 19:46:48,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:48,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:48,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:48,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:46:48,194 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:48,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:48,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1568926856, now seen corresponding path program 10 times [2024-06-03 19:46:48,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:48,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757396102] [2024-06-03 19:46:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:48,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:48,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:48,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757396102] [2024-06-03 19:46:48,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757396102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:48,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:48,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:48,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154076615] [2024-06-03 19:46:48,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:48,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:48,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:48,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:48,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:48,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:48,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 308 transitions, 3301 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:48,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:48,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:48,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:49,795 INFO L124 PetriNetUnfolderBase]: 2575/4104 cut-off events. [2024-06-03 19:46:49,796 INFO L125 PetriNetUnfolderBase]: For 528995/528997 co-relation queries the response was YES. [2024-06-03 19:46:49,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38887 conditions, 4104 events. 2575/4104 cut-off events. For 528995/528997 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23551 event pairs, 652 based on Foata normal form. 4/4104 useless extension candidates. Maximal degree in co-relation 38771. Up to 3374 conditions per place. [2024-06-03 19:46:49,839 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 200 selfloop transitions, 120 changer transitions 0/325 dead transitions. [2024-06-03 19:46:49,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 325 transitions, 4315 flow [2024-06-03 19:46:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:49,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:46:49,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:46:49,840 INFO L175 Difference]: Start difference. First operand has 242 places, 308 transitions, 3301 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:46:49,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 325 transitions, 4315 flow [2024-06-03 19:46:50,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 325 transitions, 4018 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-03 19:46:50,391 INFO L231 Difference]: Finished difference. Result has 245 places, 308 transitions, 3250 flow [2024-06-03 19:46:50,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3004, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3250, PETRI_PLACES=245, PETRI_TRANSITIONS=308} [2024-06-03 19:46:50,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-03 19:46:50,392 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 308 transitions, 3250 flow [2024-06-03 19:46:50,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:50,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:50,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:50,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:46:50,392 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:50,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:50,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1876312290, now seen corresponding path program 11 times [2024-06-03 19:46:50,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:50,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053917449] [2024-06-03 19:46:50,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:50,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:51,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:51,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053917449] [2024-06-03 19:46:51,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053917449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:51,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:51,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:51,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737240606] [2024-06-03 19:46:51,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:51,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:51,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:51,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:51,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:51,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:51,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 308 transitions, 3250 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:51,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:51,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:51,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:51,958 INFO L124 PetriNetUnfolderBase]: 2569/4094 cut-off events. [2024-06-03 19:46:51,958 INFO L125 PetriNetUnfolderBase]: For 533484/533486 co-relation queries the response was YES. [2024-06-03 19:46:51,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38639 conditions, 4094 events. 2569/4094 cut-off events. For 533484/533486 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23486 event pairs, 621 based on Foata normal form. 4/4094 useless extension candidates. Maximal degree in co-relation 38523. Up to 3371 conditions per place. [2024-06-03 19:46:52,000 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 201 selfloop transitions, 118 changer transitions 0/324 dead transitions. [2024-06-03 19:46:52,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 324 transitions, 4110 flow [2024-06-03 19:46:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:46:52,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:46:52,001 INFO L175 Difference]: Start difference. First operand has 245 places, 308 transitions, 3250 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:46:52,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 324 transitions, 4110 flow [2024-06-03 19:46:52,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 324 transitions, 3660 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-03 19:46:52,560 INFO L231 Difference]: Finished difference. Result has 242 places, 308 transitions, 3042 flow [2024-06-03 19:46:52,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3042, PETRI_PLACES=242, PETRI_TRANSITIONS=308} [2024-06-03 19:46:52,561 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-03 19:46:52,561 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 308 transitions, 3042 flow [2024-06-03 19:46:52,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:52,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:52,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:52,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:46:52,562 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:52,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:52,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1870598370, now seen corresponding path program 12 times [2024-06-03 19:46:52,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:52,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025188459] [2024-06-03 19:46:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:52,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:53,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:53,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025188459] [2024-06-03 19:46:53,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025188459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:53,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:53,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:53,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903124908] [2024-06-03 19:46:53,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:53,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:53,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:53,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:53,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:53,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:53,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 308 transitions, 3042 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:53,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:53,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:53,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:54,106 INFO L124 PetriNetUnfolderBase]: 2553/4068 cut-off events. [2024-06-03 19:46:54,106 INFO L125 PetriNetUnfolderBase]: For 539126/539128 co-relation queries the response was YES. [2024-06-03 19:46:54,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38062 conditions, 4068 events. 2553/4068 cut-off events. For 539126/539128 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23338 event pairs, 618 based on Foata normal form. 6/4070 useless extension candidates. Maximal degree in co-relation 37946. Up to 3358 conditions per place. [2024-06-03 19:46:54,154 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 208 selfloop transitions, 110 changer transitions 0/323 dead transitions. [2024-06-03 19:46:54,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 323 transitions, 3744 flow [2024-06-03 19:46:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:46:54,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:46:54,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:46:54,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:46:54,156 INFO L175 Difference]: Start difference. First operand has 242 places, 308 transitions, 3042 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:46:54,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 323 transitions, 3744 flow [2024-06-03 19:46:54,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 323 transitions, 3431 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 19:46:54,795 INFO L231 Difference]: Finished difference. Result has 243 places, 308 transitions, 2957 flow [2024-06-03 19:46:54,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2957, PETRI_PLACES=243, PETRI_TRANSITIONS=308} [2024-06-03 19:46:54,795 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-03 19:46:54,795 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 308 transitions, 2957 flow [2024-06-03 19:46:54,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-03 19:46:54,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:54,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:54,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:46:54,796 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:54,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:54,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1884416434, now seen corresponding path program 5 times [2024-06-03 19:46:54,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:54,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574936961] [2024-06-03 19:46:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:54,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:55,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:55,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574936961] [2024-06-03 19:46:55,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574936961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:55,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:55,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:55,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509930288] [2024-06-03 19:46:55,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:55,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:55,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:55,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:55,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:55,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:55,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 308 transitions, 2957 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:55,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:55,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:55,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:56,464 INFO L124 PetriNetUnfolderBase]: 2620/4161 cut-off events. [2024-06-03 19:46:56,464 INFO L125 PetriNetUnfolderBase]: For 567363/567365 co-relation queries the response was YES. [2024-06-03 19:46:56,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39564 conditions, 4161 events. 2620/4161 cut-off events. For 567363/567365 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23793 event pairs, 600 based on Foata normal form. 5/4162 useless extension candidates. Maximal degree in co-relation 39447. Up to 3164 conditions per place. [2024-06-03 19:46:56,511 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 199 selfloop transitions, 144 changer transitions 0/348 dead transitions. [2024-06-03 19:46:56,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 348 transitions, 4501 flow [2024-06-03 19:46:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:46:56,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:46:56,513 INFO L175 Difference]: Start difference. First operand has 243 places, 308 transitions, 2957 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:46:56,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 348 transitions, 4501 flow [2024-06-03 19:46:57,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 348 transitions, 4223 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 19:46:57,211 INFO L231 Difference]: Finished difference. Result has 245 places, 327 transitions, 3421 flow [2024-06-03 19:46:57,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3421, PETRI_PLACES=245, PETRI_TRANSITIONS=327} [2024-06-03 19:46:57,212 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-03 19:46:57,212 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 327 transitions, 3421 flow [2024-06-03 19:46:57,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:57,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:57,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:57,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:46:57,212 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:57,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:57,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1870594774, now seen corresponding path program 6 times [2024-06-03 19:46:57,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:57,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121774945] [2024-06-03 19:46:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:57,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:58,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:58,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121774945] [2024-06-03 19:46:58,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121774945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:58,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:58,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:58,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977501600] [2024-06-03 19:46:58,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:58,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:58,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:58,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:58,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:58,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:58,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 327 transitions, 3421 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:58,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:58,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:58,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:59,056 INFO L124 PetriNetUnfolderBase]: 2691/4270 cut-off events. [2024-06-03 19:46:59,056 INFO L125 PetriNetUnfolderBase]: For 612229/612231 co-relation queries the response was YES. [2024-06-03 19:46:59,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42369 conditions, 4270 events. 2691/4270 cut-off events. For 612229/612231 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 24473 event pairs, 606 based on Foata normal form. 5/4271 useless extension candidates. Maximal degree in co-relation 42249. Up to 3223 conditions per place. [2024-06-03 19:46:59,108 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 213 selfloop transitions, 143 changer transitions 0/361 dead transitions. [2024-06-03 19:46:59,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 361 transitions, 5216 flow [2024-06-03 19:46:59,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:59,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:46:59,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:46:59,109 INFO L175 Difference]: Start difference. First operand has 245 places, 327 transitions, 3421 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:46:59,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 361 transitions, 5216 flow [2024-06-03 19:46:59,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 361 transitions, 4878 flow, removed 107 selfloop flow, removed 4 redundant places. [2024-06-03 19:46:59,775 INFO L231 Difference]: Finished difference. Result has 252 places, 339 transitions, 3845 flow [2024-06-03 19:46:59,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3125, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3845, PETRI_PLACES=252, PETRI_TRANSITIONS=339} [2024-06-03 19:46:59,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-03 19:46:59,776 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 339 transitions, 3845 flow [2024-06-03 19:46:59,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:46:59,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:59,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:59,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:46:59,776 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:59,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:59,777 INFO L85 PathProgramCache]: Analyzing trace with hash 86418214, now seen corresponding path program 7 times [2024-06-03 19:46:59,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:59,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780913971] [2024-06-03 19:46:59,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:59,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:00,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:00,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780913971] [2024-06-03 19:47:00,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780913971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:00,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:00,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:00,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366899730] [2024-06-03 19:47:00,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:00,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:00,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:00,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:00,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:00,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:00,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 339 transitions, 3845 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:00,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:00,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:00,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:01,579 INFO L124 PetriNetUnfolderBase]: 2686/4263 cut-off events. [2024-06-03 19:47:01,579 INFO L125 PetriNetUnfolderBase]: For 620377/620379 co-relation queries the response was YES. [2024-06-03 19:47:01,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42703 conditions, 4263 events. 2686/4263 cut-off events. For 620377/620379 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 24432 event pairs, 601 based on Foata normal form. 5/4264 useless extension candidates. Maximal degree in co-relation 42579. Up to 3221 conditions per place. [2024-06-03 19:47:01,632 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 218 selfloop transitions, 138 changer transitions 0/361 dead transitions. [2024-06-03 19:47:01,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 361 transitions, 5245 flow [2024-06-03 19:47:01,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:47:01,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:47:01,633 INFO L175 Difference]: Start difference. First operand has 252 places, 339 transitions, 3845 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:47:01,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 361 transitions, 5245 flow [2024-06-03 19:47:02,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 361 transitions, 4852 flow, removed 121 selfloop flow, removed 4 redundant places. [2024-06-03 19:47:02,404 INFO L231 Difference]: Finished difference. Result has 257 places, 339 transitions, 3740 flow [2024-06-03 19:47:02,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3740, PETRI_PLACES=257, PETRI_TRANSITIONS=339} [2024-06-03 19:47:02,405 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-03 19:47:02,405 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 339 transitions, 3740 flow [2024-06-03 19:47:02,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:02,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:02,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:02,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:47:02,406 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:02,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:02,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1470751504, now seen corresponding path program 8 times [2024-06-03 19:47:02,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:02,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824501511] [2024-06-03 19:47:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:02,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:03,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:03,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824501511] [2024-06-03 19:47:03,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824501511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:03,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:03,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:03,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405354638] [2024-06-03 19:47:03,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:03,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:03,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:03,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:03,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:03,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:03,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 339 transitions, 3740 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:03,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:03,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:03,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:04,070 INFO L124 PetriNetUnfolderBase]: 2717/4311 cut-off events. [2024-06-03 19:47:04,070 INFO L125 PetriNetUnfolderBase]: For 638232/638234 co-relation queries the response was YES. [2024-06-03 19:47:04,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43079 conditions, 4311 events. 2717/4311 cut-off events. For 638232/638234 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24728 event pairs, 644 based on Foata normal form. 5/4312 useless extension candidates. Maximal degree in co-relation 42954. Up to 3250 conditions per place. [2024-06-03 19:47:04,123 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 208 selfloop transitions, 156 changer transitions 0/369 dead transitions. [2024-06-03 19:47:04,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 369 transitions, 5386 flow [2024-06-03 19:47:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:04,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:47:04,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-03 19:47:04,125 INFO L175 Difference]: Start difference. First operand has 257 places, 339 transitions, 3740 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:47:04,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 369 transitions, 5386 flow [2024-06-03 19:47:04,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 369 transitions, 5055 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-03 19:47:04,865 INFO L231 Difference]: Finished difference. Result has 258 places, 349 transitions, 4142 flow [2024-06-03 19:47:04,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3423, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4142, PETRI_PLACES=258, PETRI_TRANSITIONS=349} [2024-06-03 19:47:04,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-03 19:47:04,866 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 349 transitions, 4142 flow [2024-06-03 19:47:04,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:04,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:04,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:04,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 19:47:04,867 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:04,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:04,868 INFO L85 PathProgramCache]: Analyzing trace with hash 100228218, now seen corresponding path program 2 times [2024-06-03 19:47:04,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:04,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984008994] [2024-06-03 19:47:04,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:04,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:05,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:05,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984008994] [2024-06-03 19:47:05,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984008994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:05,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:05,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:05,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564056775] [2024-06-03 19:47:05,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:05,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:05,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:05,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:05,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:05,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:05,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 349 transitions, 4142 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:05,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:05,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:05,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:06,659 INFO L124 PetriNetUnfolderBase]: 2730/4304 cut-off events. [2024-06-03 19:47:06,659 INFO L125 PetriNetUnfolderBase]: For 655616/655623 co-relation queries the response was YES. [2024-06-03 19:47:06,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43913 conditions, 4304 events. 2730/4304 cut-off events. For 655616/655623 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24390 event pairs, 678 based on Foata normal form. 7/4309 useless extension candidates. Maximal degree in co-relation 43788. Up to 4016 conditions per place. [2024-06-03 19:47:06,711 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 315 selfloop transitions, 52 changer transitions 0/372 dead transitions. [2024-06-03 19:47:06,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 372 transitions, 5624 flow [2024-06-03 19:47:06,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:47:06,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-03 19:47:06,712 INFO L175 Difference]: Start difference. First operand has 258 places, 349 transitions, 4142 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:47:06,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 372 transitions, 5624 flow [2024-06-03 19:47:07,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 372 transitions, 5436 flow, removed 84 selfloop flow, removed 3 redundant places. [2024-06-03 19:47:07,367 INFO L231 Difference]: Finished difference. Result has 264 places, 358 transitions, 4454 flow [2024-06-03 19:47:07,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4454, PETRI_PLACES=264, PETRI_TRANSITIONS=358} [2024-06-03 19:47:07,368 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-03 19:47:07,368 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 358 transitions, 4454 flow [2024-06-03 19:47:07,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:07,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:07,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:07,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 19:47:07,369 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:07,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash -313091186, now seen corresponding path program 9 times [2024-06-03 19:47:07,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:07,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117639428] [2024-06-03 19:47:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:07,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:08,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:08,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117639428] [2024-06-03 19:47:08,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117639428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:08,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:08,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:08,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244563133] [2024-06-03 19:47:08,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:08,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:08,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:08,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:08,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 358 transitions, 4454 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:08,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:08,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:08,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:09,142 INFO L124 PetriNetUnfolderBase]: 2745/4351 cut-off events. [2024-06-03 19:47:09,142 INFO L125 PetriNetUnfolderBase]: For 671832/671834 co-relation queries the response was YES. [2024-06-03 19:47:09,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44165 conditions, 4351 events. 2745/4351 cut-off events. For 671832/671834 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24929 event pairs, 643 based on Foata normal form. 5/4352 useless extension candidates. Maximal degree in co-relation 44038. Up to 3282 conditions per place. [2024-06-03 19:47:09,193 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 234 selfloop transitions, 144 changer transitions 0/383 dead transitions. [2024-06-03 19:47:09,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 383 transitions, 6095 flow [2024-06-03 19:47:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 19:47:09,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-03 19:47:09,196 INFO L175 Difference]: Start difference. First operand has 264 places, 358 transitions, 4454 flow. Second operand 9 states and 175 transitions. [2024-06-03 19:47:09,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 383 transitions, 6095 flow [2024-06-03 19:47:09,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 383 transitions, 5921 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-03 19:47:09,890 INFO L231 Difference]: Finished difference. Result has 269 places, 362 transitions, 4702 flow [2024-06-03 19:47:09,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4280, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4702, PETRI_PLACES=269, PETRI_TRANSITIONS=362} [2024-06-03 19:47:09,891 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-03 19:47:09,891 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 362 transitions, 4702 flow [2024-06-03 19:47:09,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:09,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:09,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:09,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 19:47:09,892 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:09,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:09,892 INFO L85 PathProgramCache]: Analyzing trace with hash 86418648, now seen corresponding path program 3 times [2024-06-03 19:47:09,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:09,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640673757] [2024-06-03 19:47:09,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:09,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:10,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:10,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640673757] [2024-06-03 19:47:10,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640673757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:10,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:10,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:10,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690896959] [2024-06-03 19:47:10,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:10,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:10,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:10,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:10,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 362 transitions, 4702 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:10,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:10,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:10,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:11,645 INFO L124 PetriNetUnfolderBase]: 2750/4338 cut-off events. [2024-06-03 19:47:11,645 INFO L125 PetriNetUnfolderBase]: For 679587/679594 co-relation queries the response was YES. [2024-06-03 19:47:11,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44921 conditions, 4338 events. 2750/4338 cut-off events. For 679587/679594 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24655 event pairs, 682 based on Foata normal form. 7/4343 useless extension candidates. Maximal degree in co-relation 44792. Up to 4043 conditions per place. [2024-06-03 19:47:11,699 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 53 changer transitions 0/379 dead transitions. [2024-06-03 19:47:11,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 379 transitions, 5940 flow [2024-06-03 19:47:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:47:11,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-03 19:47:11,701 INFO L175 Difference]: Start difference. First operand has 269 places, 362 transitions, 4702 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:47:11,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 379 transitions, 5940 flow [2024-06-03 19:47:12,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 379 transitions, 5476 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-03 19:47:12,748 INFO L231 Difference]: Finished difference. Result has 269 places, 365 transitions, 4468 flow [2024-06-03 19:47:12,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4238, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4468, PETRI_PLACES=269, PETRI_TRANSITIONS=365} [2024-06-03 19:47:12,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-03 19:47:12,749 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 365 transitions, 4468 flow [2024-06-03 19:47:12,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:12,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:12,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:12,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 19:47:12,750 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)] === [2024-06-03 19:47:12,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:12,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1471109554, now seen corresponding path program 10 times [2024-06-03 19:47:12,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:12,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566334238] [2024-06-03 19:47:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:12,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:13,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:13,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566334238] [2024-06-03 19:47:13,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566334238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:13,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:13,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:13,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14112258] [2024-06-03 19:47:13,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:13,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:13,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:13,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:13,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:13,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:13,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 365 transitions, 4468 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:13,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:13,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:13,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:14,424 INFO L124 PetriNetUnfolderBase]: 2745/4356 cut-off events. [2024-06-03 19:47:14,424 INFO L125 PetriNetUnfolderBase]: For 687260/687262 co-relation queries the response was YES. [2024-06-03 19:47:14,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43947 conditions, 4356 events. 2745/4356 cut-off events. For 687260/687262 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 25013 event pairs, 641 based on Foata normal form. 5/4357 useless extension candidates. Maximal degree in co-relation 43820. Up to 3287 conditions per place. [2024-06-03 19:47:14,477 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 237 selfloop transitions, 143 changer transitions 0/385 dead transitions. [2024-06-03 19:47:14,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 385 transitions, 5828 flow [2024-06-03 19:47:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:14,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:47:14,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-03 19:47:14,479 INFO L175 Difference]: Start difference. First operand has 269 places, 365 transitions, 4468 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:47:14,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 385 transitions, 5828 flow [2024-06-03 19:47:15,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 385 transitions, 5550 flow, removed 100 selfloop flow, removed 6 redundant places. [2024-06-03 19:47:15,322 INFO L231 Difference]: Finished difference. Result has 272 places, 365 transitions, 4484 flow [2024-06-03 19:47:15,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4484, PETRI_PLACES=272, PETRI_TRANSITIONS=365} [2024-06-03 19:47:15,322 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-03 19:47:15,322 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 365 transitions, 4484 flow [2024-06-03 19:47:15,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:15,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:15,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:15,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 19:47:15,323 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:15,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:15,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1471109988, now seen corresponding path program 4 times [2024-06-03 19:47:15,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:15,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280339720] [2024-06-03 19:47:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:15,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:16,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:16,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280339720] [2024-06-03 19:47:16,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280339720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:16,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:16,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:16,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381589668] [2024-06-03 19:47:16,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:16,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:16,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:16,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:16,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:16,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:16,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 365 transitions, 4484 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:16,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:16,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:16,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:16,975 INFO L124 PetriNetUnfolderBase]: 2742/4328 cut-off events. [2024-06-03 19:47:16,975 INFO L125 PetriNetUnfolderBase]: For 690799/690806 co-relation queries the response was YES. [2024-06-03 19:47:17,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44234 conditions, 4328 events. 2742/4328 cut-off events. For 690799/690806 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24559 event pairs, 682 based on Foata normal form. 7/4333 useless extension candidates. Maximal degree in co-relation 44106. Up to 4034 conditions per place. [2024-06-03 19:47:17,029 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 52 changer transitions 0/378 dead transitions. [2024-06-03 19:47:17,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 378 transitions, 5434 flow [2024-06-03 19:47:17,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:47:17,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-03 19:47:17,030 INFO L175 Difference]: Start difference. First operand has 272 places, 365 transitions, 4484 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:47:17,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 378 transitions, 5434 flow [2024-06-03 19:47:17,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 378 transitions, 5077 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-03 19:47:17,809 INFO L231 Difference]: Finished difference. Result has 274 places, 365 transitions, 4237 flow [2024-06-03 19:47:17,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4237, PETRI_PLACES=274, PETRI_TRANSITIONS=365} [2024-06-03 19:47:17,810 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-03 19:47:17,810 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 365 transitions, 4237 flow [2024-06-03 19:47:17,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:17,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:17,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:17,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 19:47:17,811 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:17,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash 100242168, now seen corresponding path program 5 times [2024-06-03 19:47:17,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:17,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321499035] [2024-06-03 19:47:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:17,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:18,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:18,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321499035] [2024-06-03 19:47:18,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321499035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:18,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:18,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:18,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984487273] [2024-06-03 19:47:18,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:18,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:18,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:18,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:18,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:18,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:18,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 365 transitions, 4237 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:18,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:18,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:18,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:19,563 INFO L124 PetriNetUnfolderBase]: 2739/4324 cut-off events. [2024-06-03 19:47:19,563 INFO L125 PetriNetUnfolderBase]: For 697921/697921 co-relation queries the response was YES. [2024-06-03 19:47:19,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43666 conditions, 4324 events. 2739/4324 cut-off events. For 697921/697921 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24547 event pairs, 673 based on Foata normal form. 1/4324 useless extension candidates. Maximal degree in co-relation 43537. Up to 4085 conditions per place. [2024-06-03 19:47:19,616 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 352 selfloop transitions, 20 changer transitions 0/377 dead transitions. [2024-06-03 19:47:19,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 377 transitions, 5009 flow [2024-06-03 19:47:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:19,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 19:47:19,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-03 19:47:19,617 INFO L175 Difference]: Start difference. First operand has 274 places, 365 transitions, 4237 flow. Second operand 9 states and 148 transitions. [2024-06-03 19:47:19,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 377 transitions, 5009 flow [2024-06-03 19:47:20,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 377 transitions, 4739 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-06-03 19:47:20,488 INFO L231 Difference]: Finished difference. Result has 274 places, 365 transitions, 4013 flow [2024-06-03 19:47:20,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4013, PETRI_PLACES=274, PETRI_TRANSITIONS=365} [2024-06-03 19:47:20,488 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-03 19:47:20,488 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 365 transitions, 4013 flow [2024-06-03 19:47:20,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:20,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:20,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:20,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 19:47:20,489 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:20,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:20,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1321205662, now seen corresponding path program 1 times [2024-06-03 19:47:20,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:20,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784814027] [2024-06-03 19:47:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:20,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:21,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:21,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784814027] [2024-06-03 19:47:21,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784814027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:21,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:21,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:47:21,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564314991] [2024-06-03 19:47:21,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:21,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:47:21,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:21,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:47:21,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:47:21,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:47:21,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 365 transitions, 4013 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-03 19:47:21,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:21,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:47:21,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:22,298 INFO L124 PetriNetUnfolderBase]: 2546/4130 cut-off events. [2024-06-03 19:47:22,298 INFO L125 PetriNetUnfolderBase]: For 721088/721092 co-relation queries the response was YES. [2024-06-03 19:47:22,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42598 conditions, 4130 events. 2546/4130 cut-off events. For 721088/721092 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24397 event pairs, 553 based on Foata normal form. 4/4124 useless extension candidates. Maximal degree in co-relation 42468. Up to 3503 conditions per place. [2024-06-03 19:47:22,350 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 321 selfloop transitions, 15 changer transitions 0/389 dead transitions. [2024-06-03 19:47:22,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 389 transitions, 4805 flow [2024-06-03 19:47:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:47:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:47:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:47:22,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-03 19:47:22,351 INFO L175 Difference]: Start difference. First operand has 274 places, 365 transitions, 4013 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:47:22,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 389 transitions, 4805 flow [2024-06-03 19:47:23,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 389 transitions, 4751 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 19:47:23,283 INFO L231 Difference]: Finished difference. Result has 274 places, 367 transitions, 4064 flow [2024-06-03 19:47:23,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3959, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4064, PETRI_PLACES=274, PETRI_TRANSITIONS=367} [2024-06-03 19:47:23,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-03 19:47:23,284 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 367 transitions, 4064 flow [2024-06-03 19:47:23,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-03 19:47:23,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:23,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:23,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 19:47:23,285 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:23,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:23,285 INFO L85 PathProgramCache]: Analyzing trace with hash 505086976, now seen corresponding path program 2 times [2024-06-03 19:47:23,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:23,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73436019] [2024-06-03 19:47:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:23,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:24,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:24,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73436019] [2024-06-03 19:47:24,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73436019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:24,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:24,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:47:24,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124349717] [2024-06-03 19:47:24,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:24,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:47:24,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:24,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:47:24,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:47:24,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:47:24,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 367 transitions, 4064 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-03 19:47:24,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:24,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:47:24,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:25,321 INFO L124 PetriNetUnfolderBase]: 2554/4142 cut-off events. [2024-06-03 19:47:25,322 INFO L125 PetriNetUnfolderBase]: For 736735/736739 co-relation queries the response was YES. [2024-06-03 19:47:25,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43044 conditions, 4142 events. 2554/4142 cut-off events. For 736735/736739 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24475 event pairs, 589 based on Foata normal form. 4/4136 useless extension candidates. Maximal degree in co-relation 42913. Up to 3532 conditions per place. [2024-06-03 19:47:25,374 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 318 selfloop transitions, 16 changer transitions 0/387 dead transitions. [2024-06-03 19:47:25,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 387 transitions, 4846 flow [2024-06-03 19:47:25,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:47:25,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:47:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:47:25,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-03 19:47:25,375 INFO L175 Difference]: Start difference. First operand has 274 places, 367 transitions, 4064 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:47:25,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 387 transitions, 4846 flow [2024-06-03 19:47:26,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 387 transitions, 4757 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:47:26,335 INFO L231 Difference]: Finished difference. Result has 276 places, 369 transitions, 4086 flow [2024-06-03 19:47:26,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3975, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4086, PETRI_PLACES=276, PETRI_TRANSITIONS=369} [2024-06-03 19:47:26,335 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-03 19:47:26,336 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 369 transitions, 4086 flow [2024-06-03 19:47:26,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-03 19:47:26,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:26,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:26,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 19:47:26,336 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:26,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:26,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1324067582, now seen corresponding path program 1 times [2024-06-03 19:47:26,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:26,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076906017] [2024-06-03 19:47:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:26,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:27,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:27,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076906017] [2024-06-03 19:47:27,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076906017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:27,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:27,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:27,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584416478] [2024-06-03 19:47:27,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:27,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:27,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:27,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:27,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:27,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:47:27,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 369 transitions, 4086 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:27,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:27,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:47:27,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:28,288 INFO L124 PetriNetUnfolderBase]: 2670/4261 cut-off events. [2024-06-03 19:47:28,289 INFO L125 PetriNetUnfolderBase]: For 741528/741528 co-relation queries the response was YES. [2024-06-03 19:47:28,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43568 conditions, 4261 events. 2670/4261 cut-off events. For 741528/741528 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24551 event pairs, 639 based on Foata normal form. 2/4262 useless extension candidates. Maximal degree in co-relation 43436. Up to 3818 conditions per place. [2024-06-03 19:47:28,340 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 344 selfloop transitions, 20 changer transitions 0/390 dead transitions. [2024-06-03 19:47:28,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 390 transitions, 4948 flow [2024-06-03 19:47:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:47:28,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:47:28,341 INFO L175 Difference]: Start difference. First operand has 276 places, 369 transitions, 4086 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:47:28,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 390 transitions, 4948 flow [2024-06-03 19:47:29,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 390 transitions, 4853 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:47:29,324 INFO L231 Difference]: Finished difference. Result has 279 places, 372 transitions, 4133 flow [2024-06-03 19:47:29,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3991, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4133, PETRI_PLACES=279, PETRI_TRANSITIONS=372} [2024-06-03 19:47:29,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-03 19:47:29,325 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 372 transitions, 4133 flow [2024-06-03 19:47:29,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:29,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:29,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:29,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 19:47:29,325 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:29,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash 48494752, now seen corresponding path program 3 times [2024-06-03 19:47:29,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:29,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918177195] [2024-06-03 19:47:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:29,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:30,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:30,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918177195] [2024-06-03 19:47:30,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918177195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:30,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:30,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:47:30,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854839252] [2024-06-03 19:47:30,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:30,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:47:30,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:30,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:47:30,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:47:30,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:47:30,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 372 transitions, 4133 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-03 19:47:30,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:30,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:47:30,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:31,282 INFO L124 PetriNetUnfolderBase]: 2554/4146 cut-off events. [2024-06-03 19:47:31,283 INFO L125 PetriNetUnfolderBase]: For 761449/761457 co-relation queries the response was YES. [2024-06-03 19:47:31,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43379 conditions, 4146 events. 2554/4146 cut-off events. For 761449/761457 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24500 event pairs, 583 based on Foata normal form. 6/4136 useless extension candidates. Maximal degree in co-relation 43246. Up to 3543 conditions per place. [2024-06-03 19:47:31,333 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 323 selfloop transitions, 16 changer transitions 0/392 dead transitions. [2024-06-03 19:47:31,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 392 transitions, 4952 flow [2024-06-03 19:47:31,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:47:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:47:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:47:31,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:47:31,335 INFO L175 Difference]: Start difference. First operand has 279 places, 372 transitions, 4133 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:47:31,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 392 transitions, 4952 flow [2024-06-03 19:47:32,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 392 transitions, 4838 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-03 19:47:32,392 INFO L231 Difference]: Finished difference. Result has 281 places, 377 transitions, 4171 flow [2024-06-03 19:47:32,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4019, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4171, PETRI_PLACES=281, PETRI_TRANSITIONS=377} [2024-06-03 19:47:32,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-03 19:47:32,393 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 377 transitions, 4171 flow [2024-06-03 19:47:32,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-03 19:47:32,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:32,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:32,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 19:47:32,393 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:32,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:32,393 INFO L85 PathProgramCache]: Analyzing trace with hash -135947328, now seen corresponding path program 4 times [2024-06-03 19:47:32,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:32,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059636218] [2024-06-03 19:47:32,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:32,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:33,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:33,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059636218] [2024-06-03 19:47:33,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059636218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:33,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:33,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:47:33,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606772637] [2024-06-03 19:47:33,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:33,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:47:33,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:33,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:47:33,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:47:33,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:47:33,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 377 transitions, 4171 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-03 19:47:33,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:33,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:47:33,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:34,392 INFO L124 PetriNetUnfolderBase]: 2549/4140 cut-off events. [2024-06-03 19:47:34,393 INFO L125 PetriNetUnfolderBase]: For 768386/768400 co-relation queries the response was YES. [2024-06-03 19:47:34,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43452 conditions, 4140 events. 2549/4140 cut-off events. For 768386/768400 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24490 event pairs, 582 based on Foata normal form. 10/4128 useless extension candidates. Maximal degree in co-relation 43317. Up to 3527 conditions per place. [2024-06-03 19:47:34,445 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 318 selfloop transitions, 23 changer transitions 0/394 dead transitions. [2024-06-03 19:47:34,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 394 transitions, 4992 flow [2024-06-03 19:47:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:47:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:47:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:47:34,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:47:34,456 INFO L175 Difference]: Start difference. First operand has 281 places, 377 transitions, 4171 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:47:34,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 394 transitions, 4992 flow [2024-06-03 19:47:35,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 394 transitions, 4885 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-03 19:47:35,462 INFO L231 Difference]: Finished difference. Result has 285 places, 382 transitions, 4236 flow [2024-06-03 19:47:35,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4064, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4236, PETRI_PLACES=285, PETRI_TRANSITIONS=382} [2024-06-03 19:47:35,462 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-03 19:47:35,462 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 382 transitions, 4236 flow [2024-06-03 19:47:35,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-03 19:47:35,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:35,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:35,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 19:47:35,463 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:35,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:35,463 INFO L85 PathProgramCache]: Analyzing trace with hash 100720312, now seen corresponding path program 1 times [2024-06-03 19:47:35,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:35,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267946089] [2024-06-03 19:47:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:35,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:36,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:36,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267946089] [2024-06-03 19:47:36,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267946089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:36,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:36,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:47:36,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761821593] [2024-06-03 19:47:36,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:36,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:47:36,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:36,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:47:36,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:47:36,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:36,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 382 transitions, 4236 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:36,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:36,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:36,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:37,737 INFO L124 PetriNetUnfolderBase]: 2747/4346 cut-off events. [2024-06-03 19:47:37,737 INFO L125 PetriNetUnfolderBase]: For 774778/774778 co-relation queries the response was YES. [2024-06-03 19:47:37,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44819 conditions, 4346 events. 2747/4346 cut-off events. For 774778/774778 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24812 event pairs, 659 based on Foata normal form. 2/4347 useless extension candidates. Maximal degree in co-relation 44682. Up to 4093 conditions per place. [2024-06-03 19:47:37,796 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 371 selfloop transitions, 22 changer transitions 0/398 dead transitions. [2024-06-03 19:47:37,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 398 transitions, 5166 flow [2024-06-03 19:47:37,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:47:37,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:47:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-03 19:47:37,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-03 19:47:37,798 INFO L175 Difference]: Start difference. First operand has 285 places, 382 transitions, 4236 flow. Second operand 10 states and 162 transitions. [2024-06-03 19:47:37,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 398 transitions, 5166 flow [2024-06-03 19:47:38,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 398 transitions, 5039 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 19:47:39,003 INFO L231 Difference]: Finished difference. Result has 290 places, 384 transitions, 4274 flow [2024-06-03 19:47:39,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4109, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4274, PETRI_PLACES=290, PETRI_TRANSITIONS=384} [2024-06-03 19:47:39,004 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-03 19:47:39,004 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 384 transitions, 4274 flow [2024-06-03 19:47:39,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:39,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:39,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:39,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 19:47:39,005 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:39,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:39,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1483164742, now seen corresponding path program 1 times [2024-06-03 19:47:39,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:39,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837644491] [2024-06-03 19:47:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:39,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:39,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:39,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837644491] [2024-06-03 19:47:39,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837644491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:39,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:39,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:39,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685390648] [2024-06-03 19:47:39,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:39,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:39,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:39,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:39,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:39,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:39,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 384 transitions, 4274 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:39,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:39,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:39,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:40,817 INFO L124 PetriNetUnfolderBase]: 2783/4401 cut-off events. [2024-06-03 19:47:40,818 INFO L125 PetriNetUnfolderBase]: For 820063/820065 co-relation queries the response was YES. [2024-06-03 19:47:40,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45453 conditions, 4401 events. 2783/4401 cut-off events. For 820063/820065 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 25109 event pairs, 519 based on Foata normal form. 12/4412 useless extension candidates. Maximal degree in co-relation 45315. Up to 3950 conditions per place. [2024-06-03 19:47:40,877 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 390 selfloop transitions, 27 changer transitions 0/422 dead transitions. [2024-06-03 19:47:40,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 422 transitions, 5392 flow [2024-06-03 19:47:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:40,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:47:40,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 19:47:40,879 INFO L175 Difference]: Start difference. First operand has 290 places, 384 transitions, 4274 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:47:40,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 422 transitions, 5392 flow [2024-06-03 19:47:42,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 422 transitions, 5235 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-03 19:47:42,092 INFO L231 Difference]: Finished difference. Result has 291 places, 386 transitions, 4270 flow [2024-06-03 19:47:42,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4117, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4270, PETRI_PLACES=291, PETRI_TRANSITIONS=386} [2024-06-03 19:47:42,092 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-03 19:47:42,093 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 386 transitions, 4270 flow [2024-06-03 19:47:42,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:42,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:42,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:42,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 19:47:42,093 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:42,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:42,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1748862022, now seen corresponding path program 2 times [2024-06-03 19:47:42,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:42,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024537215] [2024-06-03 19:47:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:42,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:42,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:42,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024537215] [2024-06-03 19:47:42,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024537215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:42,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:42,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:42,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399323436] [2024-06-03 19:47:42,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:42,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:42,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:42,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:42,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:43,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:43,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 386 transitions, 4270 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:43,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:43,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:43,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:44,007 INFO L124 PetriNetUnfolderBase]: 2899/4583 cut-off events. [2024-06-03 19:47:44,008 INFO L125 PetriNetUnfolderBase]: For 903631/903633 co-relation queries the response was YES. [2024-06-03 19:47:44,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48415 conditions, 4583 events. 2899/4583 cut-off events. For 903631/903633 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26361 event pairs, 689 based on Foata normal form. 14/4596 useless extension candidates. Maximal degree in co-relation 48276. Up to 4060 conditions per place. [2024-06-03 19:47:44,070 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 388 selfloop transitions, 33 changer transitions 0/426 dead transitions. [2024-06-03 19:47:44,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 426 transitions, 5732 flow [2024-06-03 19:47:44,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:44,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:44,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-03 19:47:44,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-03 19:47:44,071 INFO L175 Difference]: Start difference. First operand has 291 places, 386 transitions, 4270 flow. Second operand 9 states and 177 transitions. [2024-06-03 19:47:44,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 426 transitions, 5732 flow [2024-06-03 19:47:45,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 426 transitions, 5613 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-03 19:47:45,212 INFO L231 Difference]: Finished difference. Result has 293 places, 390 transitions, 4414 flow [2024-06-03 19:47:45,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4151, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4414, PETRI_PLACES=293, PETRI_TRANSITIONS=390} [2024-06-03 19:47:45,213 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-03 19:47:45,213 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 390 transitions, 4414 flow [2024-06-03 19:47:45,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:45,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:45,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:45,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 19:47:45,214 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:45,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:45,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1749188452, now seen corresponding path program 3 times [2024-06-03 19:47:45,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:45,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717002698] [2024-06-03 19:47:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:45,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:46,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:46,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717002698] [2024-06-03 19:47:46,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717002698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:46,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:46,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:46,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946666279] [2024-06-03 19:47:46,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:46,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:46,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:46,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:46,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:46,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:46,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 390 transitions, 4414 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:46,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:46,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:46,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:47,237 INFO L124 PetriNetUnfolderBase]: 2871/4545 cut-off events. [2024-06-03 19:47:47,237 INFO L125 PetriNetUnfolderBase]: For 869566/869568 co-relation queries the response was YES. [2024-06-03 19:47:47,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47101 conditions, 4545 events. 2871/4545 cut-off events. For 869566/869568 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26155 event pairs, 703 based on Foata normal form. 14/4558 useless extension candidates. Maximal degree in co-relation 46961. Up to 4158 conditions per place. [2024-06-03 19:47:47,301 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 386 selfloop transitions, 30 changer transitions 0/421 dead transitions. [2024-06-03 19:47:47,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 421 transitions, 5416 flow [2024-06-03 19:47:47,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:47,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:47:47,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:47:47,303 INFO L175 Difference]: Start difference. First operand has 293 places, 390 transitions, 4414 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:47:47,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 421 transitions, 5416 flow [2024-06-03 19:47:48,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 421 transitions, 5239 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-03 19:47:48,674 INFO L231 Difference]: Finished difference. Result has 297 places, 390 transitions, 4303 flow [2024-06-03 19:47:48,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4237, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4303, PETRI_PLACES=297, PETRI_TRANSITIONS=390} [2024-06-03 19:47:48,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-03 19:47:48,675 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 390 transitions, 4303 flow [2024-06-03 19:47:48,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:48,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:48,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:48,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 19:47:48,676 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:48,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:48,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1749200356, now seen corresponding path program 1 times [2024-06-03 19:47:48,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:48,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110641785] [2024-06-03 19:47:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:48,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:49,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:49,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110641785] [2024-06-03 19:47:49,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110641785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:49,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:49,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:47:49,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121589945] [2024-06-03 19:47:49,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:49,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:47:49,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:49,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:47:49,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:47:49,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:49,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 390 transitions, 4303 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:49,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:49,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:49,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:50,730 INFO L124 PetriNetUnfolderBase]: 2886/4568 cut-off events. [2024-06-03 19:47:50,730 INFO L125 PetriNetUnfolderBase]: For 840641/840643 co-relation queries the response was YES. [2024-06-03 19:47:50,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47222 conditions, 4568 events. 2886/4568 cut-off events. For 840641/840643 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 26339 event pairs, 704 based on Foata normal form. 5/4572 useless extension candidates. Maximal degree in co-relation 47080. Up to 4205 conditions per place. [2024-06-03 19:47:50,785 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 382 selfloop transitions, 36 changer transitions 0/423 dead transitions. [2024-06-03 19:47:50,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 423 transitions, 5411 flow [2024-06-03 19:47:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:47:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:47:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-03 19:47:50,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-03 19:47:50,788 INFO L175 Difference]: Start difference. First operand has 297 places, 390 transitions, 4303 flow. Second operand 10 states and 186 transitions. [2024-06-03 19:47:50,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 423 transitions, 5411 flow [2024-06-03 19:47:52,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 423 transitions, 5345 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 19:47:52,103 INFO L231 Difference]: Finished difference. Result has 299 places, 394 transitions, 4478 flow [2024-06-03 19:47:52,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4237, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4478, PETRI_PLACES=299, PETRI_TRANSITIONS=394} [2024-06-03 19:47:52,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-03 19:47:52,104 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 394 transitions, 4478 flow [2024-06-03 19:47:52,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:52,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:52,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:52,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 19:47:52,104 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:52,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:52,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2052761090, now seen corresponding path program 4 times [2024-06-03 19:47:52,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:52,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385490908] [2024-06-03 19:47:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:52,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:53,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:53,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385490908] [2024-06-03 19:47:53,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385490908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:53,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:53,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:53,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499020170] [2024-06-03 19:47:53,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:53,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:53,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:53,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:53,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:53,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:53,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 394 transitions, 4478 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:53,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:53,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:53,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:54,096 INFO L124 PetriNetUnfolderBase]: 2930/4652 cut-off events. [2024-06-03 19:47:54,096 INFO L125 PetriNetUnfolderBase]: For 905895/905897 co-relation queries the response was YES. [2024-06-03 19:47:54,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48540 conditions, 4652 events. 2930/4652 cut-off events. For 905895/905897 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 27024 event pairs, 698 based on Foata normal form. 14/4665 useless extension candidates. Maximal degree in co-relation 48397. Up to 4100 conditions per place. [2024-06-03 19:47:54,165 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 356 selfloop transitions, 61 changer transitions 0/422 dead transitions. [2024-06-03 19:47:54,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 422 transitions, 5584 flow [2024-06-03 19:47:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:47:54,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:47:54,166 INFO L175 Difference]: Start difference. First operand has 299 places, 394 transitions, 4478 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:47:54,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 422 transitions, 5584 flow [2024-06-03 19:47:55,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 422 transitions, 5371 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-03 19:47:55,608 INFO L231 Difference]: Finished difference. Result has 300 places, 396 transitions, 4497 flow [2024-06-03 19:47:55,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4265, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4497, PETRI_PLACES=300, PETRI_TRANSITIONS=396} [2024-06-03 19:47:55,611 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-03 19:47:55,611 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 396 transitions, 4497 flow [2024-06-03 19:47:55,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:55,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:55,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:55,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 19:47:55,612 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:55,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:55,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2052434660, now seen corresponding path program 5 times [2024-06-03 19:47:55,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:55,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851852302] [2024-06-03 19:47:55,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:55,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:56,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:56,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851852302] [2024-06-03 19:47:56,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851852302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:56,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:56,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:56,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596224750] [2024-06-03 19:47:56,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:56,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:56,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:56,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:56,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:56,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:56,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 396 transitions, 4497 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:56,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:56,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:56,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:57,696 INFO L124 PetriNetUnfolderBase]: 3046/4824 cut-off events. [2024-06-03 19:47:57,696 INFO L125 PetriNetUnfolderBase]: For 988472/988474 co-relation queries the response was YES. [2024-06-03 19:47:57,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51733 conditions, 4824 events. 3046/4824 cut-off events. For 988472/988474 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28106 event pairs, 708 based on Foata normal form. 14/4837 useless extension candidates. Maximal degree in co-relation 51589. Up to 4090 conditions per place. [2024-06-03 19:47:57,761 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 360 selfloop transitions, 66 changer transitions 0/431 dead transitions. [2024-06-03 19:47:57,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 431 transitions, 6003 flow [2024-06-03 19:47:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:57,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:47:57,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 19:47:57,762 INFO L175 Difference]: Start difference. First operand has 300 places, 396 transitions, 4497 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:47:57,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 431 transitions, 6003 flow [2024-06-03 19:47:58,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 431 transitions, 5809 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-03 19:47:58,915 INFO L231 Difference]: Finished difference. Result has 302 places, 400 transitions, 4652 flow [2024-06-03 19:47:58,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4303, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4652, PETRI_PLACES=302, PETRI_TRANSITIONS=400} [2024-06-03 19:47:58,915 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-03 19:47:58,916 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 400 transitions, 4652 flow [2024-06-03 19:47:58,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:58,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:58,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:58,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 19:47:58,916 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:58,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:58,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1552973264, now seen corresponding path program 6 times [2024-06-03 19:47:58,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:58,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594676806] [2024-06-03 19:47:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:58,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:59,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:59,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594676806] [2024-06-03 19:47:59,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594676806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:59,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:59,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:59,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416856232] [2024-06-03 19:47:59,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:59,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:59,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:59,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:59,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:59,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:59,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 400 transitions, 4652 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:47:59,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:59,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:59,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:00,901 INFO L124 PetriNetUnfolderBase]: 3018/4790 cut-off events. [2024-06-03 19:48:00,902 INFO L125 PetriNetUnfolderBase]: For 949194/949196 co-relation queries the response was YES. [2024-06-03 19:48:00,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50305 conditions, 4790 events. 3018/4790 cut-off events. For 949194/949196 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28026 event pairs, 716 based on Foata normal form. 14/4803 useless extension candidates. Maximal degree in co-relation 50160. Up to 4236 conditions per place. [2024-06-03 19:48:00,977 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 361 selfloop transitions, 60 changer transitions 0/426 dead transitions. [2024-06-03 19:48:00,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 426 transitions, 5666 flow [2024-06-03 19:48:00,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:48:00,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:48:00,979 INFO L175 Difference]: Start difference. First operand has 302 places, 400 transitions, 4652 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:48:00,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 426 transitions, 5666 flow [2024-06-03 19:48:02,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 426 transitions, 5435 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-03 19:48:02,480 INFO L231 Difference]: Finished difference. Result has 306 places, 400 transitions, 4547 flow [2024-06-03 19:48:02,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4421, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4547, PETRI_PLACES=306, PETRI_TRANSITIONS=400} [2024-06-03 19:48:02,489 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-03 19:48:02,489 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 400 transitions, 4547 flow [2024-06-03 19:48:02,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:48:02,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:02,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:02,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 19:48:02,489 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:02,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:02,490 INFO L85 PathProgramCache]: Analyzing trace with hash 545552406, now seen corresponding path program 1 times [2024-06-03 19:48:02,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:02,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042855043] [2024-06-03 19:48:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:02,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:03,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:03,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042855043] [2024-06-03 19:48:03,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042855043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:03,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:03,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:03,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057618299] [2024-06-03 19:48:03,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:03,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:03,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:03,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:03,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:03,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:48:03,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 400 transitions, 4547 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:03,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:03,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:48:03,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:04,596 INFO L124 PetriNetUnfolderBase]: 2877/4637 cut-off events. [2024-06-03 19:48:04,596 INFO L125 PetriNetUnfolderBase]: For 906294/906302 co-relation queries the response was YES. [2024-06-03 19:48:04,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49189 conditions, 4637 events. 2877/4637 cut-off events. For 906294/906302 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27720 event pairs, 706 based on Foata normal form. 7/4625 useless extension candidates. Maximal degree in co-relation 49042. Up to 3961 conditions per place. [2024-06-03 19:48:04,656 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 352 selfloop transitions, 39 changer transitions 0/429 dead transitions. [2024-06-03 19:48:04,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 429 transitions, 5523 flow [2024-06-03 19:48:04,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:48:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:48:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:48:04,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-03 19:48:04,658 INFO L175 Difference]: Start difference. First operand has 306 places, 400 transitions, 4547 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:48:04,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 429 transitions, 5523 flow [2024-06-03 19:48:06,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 429 transitions, 5389 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:48:06,353 INFO L231 Difference]: Finished difference. Result has 306 places, 406 transitions, 4639 flow [2024-06-03 19:48:06,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4639, PETRI_PLACES=306, PETRI_TRANSITIONS=406} [2024-06-03 19:48:06,354 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-03 19:48:06,354 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 406 transitions, 4639 flow [2024-06-03 19:48:06,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:06,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:06,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:06,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 19:48:06,355 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:06,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:06,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1534930668, now seen corresponding path program 2 times [2024-06-03 19:48:06,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:06,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743558694] [2024-06-03 19:48:06,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:06,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:07,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:07,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743558694] [2024-06-03 19:48:07,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743558694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:07,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:07,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:07,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812692071] [2024-06-03 19:48:07,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:07,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:07,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:07,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:07,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:07,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:48:07,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 406 transitions, 4639 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:07,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:07,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:48:07,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:08,553 INFO L124 PetriNetUnfolderBase]: 3006/4857 cut-off events. [2024-06-03 19:48:08,553 INFO L125 PetriNetUnfolderBase]: For 935411/935419 co-relation queries the response was YES. [2024-06-03 19:48:08,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51357 conditions, 4857 events. 3006/4857 cut-off events. For 935411/935419 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29199 event pairs, 736 based on Foata normal form. 7/4843 useless extension candidates. Maximal degree in co-relation 51209. Up to 4051 conditions per place. [2024-06-03 19:48:08,619 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 358 selfloop transitions, 66 changer transitions 0/462 dead transitions. [2024-06-03 19:48:08,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 462 transitions, 6428 flow [2024-06-03 19:48:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:08,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:48:08,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:48:08,622 INFO L175 Difference]: Start difference. First operand has 306 places, 406 transitions, 4639 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:48:08,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 462 transitions, 6428 flow [2024-06-03 19:48:10,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 462 transitions, 6112 flow, removed 104 selfloop flow, removed 5 redundant places. [2024-06-03 19:48:10,200 INFO L231 Difference]: Finished difference. Result has 314 places, 438 transitions, 5175 flow [2024-06-03 19:48:10,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4465, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5175, PETRI_PLACES=314, PETRI_TRANSITIONS=438} [2024-06-03 19:48:10,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-03 19:48:10,201 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 438 transitions, 5175 flow [2024-06-03 19:48:10,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:10,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:10,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:10,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 19:48:10,202 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:10,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:10,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1144307848, now seen corresponding path program 3 times [2024-06-03 19:48:10,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:10,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281242561] [2024-06-03 19:48:10,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:10,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:11,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:11,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281242561] [2024-06-03 19:48:11,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281242561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:11,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:11,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:11,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910157117] [2024-06-03 19:48:11,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:11,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:11,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:11,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:11,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:11,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:48:11,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 438 transitions, 5175 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:11,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:11,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:48:11,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:12,431 INFO L124 PetriNetUnfolderBase]: 3178/5131 cut-off events. [2024-06-03 19:48:12,431 INFO L125 PetriNetUnfolderBase]: For 972154/972164 co-relation queries the response was YES. [2024-06-03 19:48:12,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54378 conditions, 5131 events. 3178/5131 cut-off events. For 972154/972164 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31149 event pairs, 720 based on Foata normal form. 9/5121 useless extension candidates. Maximal degree in co-relation 54225. Up to 4201 conditions per place. [2024-06-03 19:48:12,500 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 377 selfloop transitions, 116 changer transitions 0/531 dead transitions. [2024-06-03 19:48:12,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 531 transitions, 7597 flow [2024-06-03 19:48:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-03 19:48:12,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-03 19:48:12,502 INFO L175 Difference]: Start difference. First operand has 314 places, 438 transitions, 5175 flow. Second operand 9 states and 180 transitions. [2024-06-03 19:48:12,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 531 transitions, 7597 flow [2024-06-03 19:48:14,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 531 transitions, 7283 flow, removed 136 selfloop flow, removed 2 redundant places. [2024-06-03 19:48:14,199 INFO L231 Difference]: Finished difference. Result has 324 places, 498 transitions, 6316 flow [2024-06-03 19:48:14,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5011, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6316, PETRI_PLACES=324, PETRI_TRANSITIONS=498} [2024-06-03 19:48:14,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-03 19:48:14,199 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 498 transitions, 6316 flow [2024-06-03 19:48:14,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:14,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:14,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:14,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 19:48:14,200 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:14,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:14,200 INFO L85 PathProgramCache]: Analyzing trace with hash -870585496, now seen corresponding path program 1 times [2024-06-03 19:48:14,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:14,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914604046] [2024-06-03 19:48:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:14,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:15,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:15,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914604046] [2024-06-03 19:48:15,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914604046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:15,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:15,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:15,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522310102] [2024-06-03 19:48:15,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:15,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:15,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:15,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:15,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:15,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:15,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 498 transitions, 6316 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:48:15,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:15,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:15,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:16,625 INFO L124 PetriNetUnfolderBase]: 3383/5353 cut-off events. [2024-06-03 19:48:16,625 INFO L125 PetriNetUnfolderBase]: For 996626/996630 co-relation queries the response was YES. [2024-06-03 19:48:16,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57361 conditions, 5353 events. 3383/5353 cut-off events. For 996626/996630 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 31541 event pairs, 780 based on Foata normal form. 6/5358 useless extension candidates. Maximal degree in co-relation 57202. Up to 4797 conditions per place. [2024-06-03 19:48:16,696 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 469 selfloop transitions, 74 changer transitions 0/548 dead transitions. [2024-06-03 19:48:16,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 548 transitions, 7877 flow [2024-06-03 19:48:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:48:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:48:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 19:48:16,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-03 19:48:16,698 INFO L175 Difference]: Start difference. First operand has 324 places, 498 transitions, 6316 flow. Second operand 10 states and 188 transitions. [2024-06-03 19:48:16,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 548 transitions, 7877 flow [2024-06-03 19:48:18,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 548 transitions, 7730 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-03 19:48:18,505 INFO L231 Difference]: Finished difference. Result has 337 places, 517 transitions, 6776 flow [2024-06-03 19:48:18,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6169, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6776, PETRI_PLACES=337, PETRI_TRANSITIONS=517} [2024-06-03 19:48:18,506 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-03 19:48:18,506 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 517 transitions, 6776 flow [2024-06-03 19:48:18,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:48:18,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:18,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:18,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 19:48:18,507 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:18,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:18,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1493846570, now seen corresponding path program 4 times [2024-06-03 19:48:18,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:18,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505635040] [2024-06-03 19:48:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:18,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:19,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:19,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505635040] [2024-06-03 19:48:19,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505635040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:19,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:19,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:19,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304622673] [2024-06-03 19:48:19,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:19,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:19,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:19,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:19,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:19,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:48:19,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 517 transitions, 6776 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:19,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:19,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:48:19,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:20,821 INFO L124 PetriNetUnfolderBase]: 3261/5272 cut-off events. [2024-06-03 19:48:20,821 INFO L125 PetriNetUnfolderBase]: For 1018047/1018063 co-relation queries the response was YES. [2024-06-03 19:48:20,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57884 conditions, 5272 events. 3261/5272 cut-off events. For 1018047/1018063 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32081 event pairs, 738 based on Foata normal form. 18/5272 useless extension candidates. Maximal degree in co-relation 57718. Up to 4405 conditions per place. [2024-06-03 19:48:20,895 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 442 selfloop transitions, 79 changer transitions 0/560 dead transitions. [2024-06-03 19:48:20,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 560 transitions, 8236 flow [2024-06-03 19:48:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:20,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-03 19:48:20,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-03 19:48:20,897 INFO L175 Difference]: Start difference. First operand has 337 places, 517 transitions, 6776 flow. Second operand 9 states and 181 transitions. [2024-06-03 19:48:20,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 560 transitions, 8236 flow [2024-06-03 19:48:23,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 560 transitions, 8012 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-03 19:48:23,016 INFO L231 Difference]: Finished difference. Result has 345 places, 534 transitions, 7137 flow [2024-06-03 19:48:23,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6559, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7137, PETRI_PLACES=345, PETRI_TRANSITIONS=534} [2024-06-03 19:48:23,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-03 19:48:23,017 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 534 transitions, 7137 flow [2024-06-03 19:48:23,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:23,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:23,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:23,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 19:48:23,017 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:23,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:23,018 INFO L85 PathProgramCache]: Analyzing trace with hash -866860629, now seen corresponding path program 1 times [2024-06-03 19:48:23,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:23,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974832776] [2024-06-03 19:48:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:23,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:23,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:23,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974832776] [2024-06-03 19:48:23,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974832776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:23,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:23,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:23,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678438802] [2024-06-03 19:48:23,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:23,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:23,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:23,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:23,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:23,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:23,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 534 transitions, 7137 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:48:23,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:23,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:23,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:25,255 INFO L124 PetriNetUnfolderBase]: 3478/5515 cut-off events. [2024-06-03 19:48:25,255 INFO L125 PetriNetUnfolderBase]: For 1046047/1046051 co-relation queries the response was YES. [2024-06-03 19:48:25,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59996 conditions, 5515 events. 3478/5515 cut-off events. For 1046047/1046051 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32735 event pairs, 763 based on Foata normal form. 8/5522 useless extension candidates. Maximal degree in co-relation 59827. Up to 4966 conditions per place. [2024-06-03 19:48:25,329 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 507 selfloop transitions, 60 changer transitions 0/572 dead transitions. [2024-06-03 19:48:25,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 572 transitions, 8576 flow [2024-06-03 19:48:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:48:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:48:25,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-03 19:48:25,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-03 19:48:25,330 INFO L175 Difference]: Start difference. First operand has 345 places, 534 transitions, 7137 flow. Second operand 10 states and 187 transitions. [2024-06-03 19:48:25,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 572 transitions, 8576 flow [2024-06-03 19:48:27,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 572 transitions, 8276 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-03 19:48:27,616 INFO L231 Difference]: Finished difference. Result has 352 places, 546 transitions, 7196 flow [2024-06-03 19:48:27,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6837, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7196, PETRI_PLACES=352, PETRI_TRANSITIONS=546} [2024-06-03 19:48:27,617 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-03 19:48:27,617 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 546 transitions, 7196 flow [2024-06-03 19:48:27,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:48:27,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:27,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:27,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 19:48:27,618 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:27,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:27,618 INFO L85 PathProgramCache]: Analyzing trace with hash -114377429, now seen corresponding path program 2 times [2024-06-03 19:48:27,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:27,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713576641] [2024-06-03 19:48:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:27,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:28,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:28,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713576641] [2024-06-03 19:48:28,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713576641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:28,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:28,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:28,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441705364] [2024-06-03 19:48:28,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:28,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:28,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:28,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:28,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:28,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:28,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 546 transitions, 7196 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:48:28,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:28,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:28,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:30,082 INFO L124 PetriNetUnfolderBase]: 3836/6085 cut-off events. [2024-06-03 19:48:30,082 INFO L125 PetriNetUnfolderBase]: For 1118103/1118107 co-relation queries the response was YES. [2024-06-03 19:48:30,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64929 conditions, 6085 events. 3836/6085 cut-off events. For 1118103/1118107 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 36928 event pairs, 807 based on Foata normal form. 8/6092 useless extension candidates. Maximal degree in co-relation 64758. Up to 5141 conditions per place. [2024-06-03 19:48:30,167 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 536 selfloop transitions, 114 changer transitions 0/655 dead transitions. [2024-06-03 19:48:30,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 655 transitions, 10214 flow [2024-06-03 19:48:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:48:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:48:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 19:48:30,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-03 19:48:30,168 INFO L175 Difference]: Start difference. First operand has 352 places, 546 transitions, 7196 flow. Second operand 10 states and 192 transitions. [2024-06-03 19:48:30,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 655 transitions, 10214 flow [2024-06-03 19:48:32,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 655 transitions, 10078 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 19:48:32,394 INFO L231 Difference]: Finished difference. Result has 360 places, 609 transitions, 8432 flow [2024-06-03 19:48:32,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8432, PETRI_PLACES=360, PETRI_TRANSITIONS=609} [2024-06-03 19:48:32,394 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-03 19:48:32,394 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 609 transitions, 8432 flow [2024-06-03 19:48:32,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:48:32,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:32,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:32,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 19:48:32,395 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:32,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:32,395 INFO L85 PathProgramCache]: Analyzing trace with hash -106758869, now seen corresponding path program 3 times [2024-06-03 19:48:32,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:32,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688662962] [2024-06-03 19:48:32,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:32,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:33,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:33,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688662962] [2024-06-03 19:48:33,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688662962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:33,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:33,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:33,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741634487] [2024-06-03 19:48:33,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:33,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:33,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:33,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:33,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:33,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:33,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 609 transitions, 8432 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:48:33,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:33,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:33,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:34,776 INFO L124 PetriNetUnfolderBase]: 3856/6103 cut-off events. [2024-06-03 19:48:34,776 INFO L125 PetriNetUnfolderBase]: For 1140681/1140685 co-relation queries the response was YES. [2024-06-03 19:48:34,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66124 conditions, 6103 events. 3856/6103 cut-off events. For 1140681/1140685 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 36826 event pairs, 771 based on Foata normal form. 8/6110 useless extension candidates. Maximal degree in co-relation 65949. Up to 5157 conditions per place. [2024-06-03 19:48:34,864 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 533 selfloop transitions, 120 changer transitions 0/658 dead transitions. [2024-06-03 19:48:34,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 658 transitions, 10439 flow [2024-06-03 19:48:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:48:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:48:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 19:48:34,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-03 19:48:34,865 INFO L175 Difference]: Start difference. First operand has 360 places, 609 transitions, 8432 flow. Second operand 10 states and 189 transitions. [2024-06-03 19:48:34,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 658 transitions, 10439 flow [2024-06-03 19:48:37,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 658 transitions, 10317 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-03 19:48:37,238 INFO L231 Difference]: Finished difference. Result has 368 places, 625 transitions, 8903 flow [2024-06-03 19:48:37,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8314, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8903, PETRI_PLACES=368, PETRI_TRANSITIONS=625} [2024-06-03 19:48:37,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-03 19:48:37,239 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 625 transitions, 8903 flow [2024-06-03 19:48:37,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:48:37,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:37,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:37,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 19:48:37,239 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:37,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:37,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2065302319, now seen corresponding path program 4 times [2024-06-03 19:48:37,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:37,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552722189] [2024-06-03 19:48:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:37,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:38,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:38,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552722189] [2024-06-03 19:48:38,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552722189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:38,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:38,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:38,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096922642] [2024-06-03 19:48:38,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:38,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:38,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:38,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:38,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:38,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:38,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 625 transitions, 8903 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:48:38,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:38,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:38,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:39,835 INFO L124 PetriNetUnfolderBase]: 3844/6087 cut-off events. [2024-06-03 19:48:39,835 INFO L125 PetriNetUnfolderBase]: For 1134623/1134627 co-relation queries the response was YES. [2024-06-03 19:48:39,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66326 conditions, 6087 events. 3844/6087 cut-off events. For 1134623/1134627 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 36825 event pairs, 771 based on Foata normal form. 8/6094 useless extension candidates. Maximal degree in co-relation 66147. Up to 5149 conditions per place. [2024-06-03 19:48:39,940 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 535 selfloop transitions, 118 changer transitions 0/658 dead transitions. [2024-06-03 19:48:39,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 658 transitions, 10655 flow [2024-06-03 19:48:39,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:48:39,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:48:39,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 19:48:39,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:48:39,942 INFO L175 Difference]: Start difference. First operand has 368 places, 625 transitions, 8903 flow. Second operand 10 states and 190 transitions. [2024-06-03 19:48:39,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 658 transitions, 10655 flow [2024-06-03 19:48:42,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 658 transitions, 10403 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-03 19:48:42,673 INFO L231 Difference]: Finished difference. Result has 373 places, 625 transitions, 8894 flow [2024-06-03 19:48:42,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8651, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8894, PETRI_PLACES=373, PETRI_TRANSITIONS=625} [2024-06-03 19:48:42,673 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-03 19:48:42,673 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 625 transitions, 8894 flow [2024-06-03 19:48:42,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:48:42,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:42,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:42,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 19:48:42,674 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:42,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:42,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1463713142, now seen corresponding path program 2 times [2024-06-03 19:48:42,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:42,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967908545] [2024-06-03 19:48:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:42,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:43,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:43,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967908545] [2024-06-03 19:48:43,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967908545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:43,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:43,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:48:43,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347929511] [2024-06-03 19:48:43,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:43,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:48:43,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:48:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:48:43,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:43,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 625 transitions, 8894 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:43,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:43,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:43,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:45,245 INFO L124 PetriNetUnfolderBase]: 3935/6221 cut-off events. [2024-06-03 19:48:45,245 INFO L125 PetriNetUnfolderBase]: For 1196903/1196907 co-relation queries the response was YES. [2024-06-03 19:48:45,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68609 conditions, 6221 events. 3935/6221 cut-off events. For 1196903/1196907 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37689 event pairs, 815 based on Foata normal form. 7/6227 useless extension candidates. Maximal degree in co-relation 68429. Up to 5152 conditions per place. [2024-06-03 19:48:45,338 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 544 selfloop transitions, 131 changer transitions 0/680 dead transitions. [2024-06-03 19:48:45,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 680 transitions, 11475 flow [2024-06-03 19:48:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:48:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:48:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-03 19:48:45,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-03 19:48:45,339 INFO L175 Difference]: Start difference. First operand has 373 places, 625 transitions, 8894 flow. Second operand 11 states and 210 transitions. [2024-06-03 19:48:45,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 680 transitions, 11475 flow [2024-06-03 19:48:47,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 680 transitions, 11313 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 19:48:47,798 INFO L231 Difference]: Finished difference. Result has 379 places, 650 transitions, 9759 flow [2024-06-03 19:48:47,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8732, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9759, PETRI_PLACES=379, PETRI_TRANSITIONS=650} [2024-06-03 19:48:47,799 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-03 19:48:47,799 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 650 transitions, 9759 flow [2024-06-03 19:48:47,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:47,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:47,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:47,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 19:48:47,800 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:47,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:47,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1474826177, now seen corresponding path program 1 times [2024-06-03 19:48:47,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:47,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015782387] [2024-06-03 19:48:47,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:47,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:48,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:48,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015782387] [2024-06-03 19:48:48,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015782387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:48,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:48,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:48:48,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870636669] [2024-06-03 19:48:48,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:48,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:48:48,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:48,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:48:48,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:48:48,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:48,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 650 transitions, 9759 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:48,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:48,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:48,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:50,550 INFO L124 PetriNetUnfolderBase]: 3940/6209 cut-off events. [2024-06-03 19:48:50,550 INFO L125 PetriNetUnfolderBase]: For 1211680/1211690 co-relation queries the response was YES. [2024-06-03 19:48:50,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69877 conditions, 6209 events. 3940/6209 cut-off events. For 1211680/1211690 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 37516 event pairs, 1098 based on Foata normal form. 11/6219 useless extension candidates. Maximal degree in co-relation 69695. Up to 5794 conditions per place. [2024-06-03 19:48:50,643 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 642 selfloop transitions, 30 changer transitions 0/677 dead transitions. [2024-06-03 19:48:50,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 677 transitions, 11336 flow [2024-06-03 19:48:50,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:48:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:48:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-03 19:48:50,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323467230443976 [2024-06-03 19:48:50,644 INFO L175 Difference]: Start difference. First operand has 379 places, 650 transitions, 9759 flow. Second operand 11 states and 186 transitions. [2024-06-03 19:48:50,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 677 transitions, 11336 flow [2024-06-03 19:48:53,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 677 transitions, 11056 flow, removed 113 selfloop flow, removed 4 redundant places. [2024-06-03 19:48:53,225 INFO L231 Difference]: Finished difference. Result has 388 places, 656 transitions, 9743 flow [2024-06-03 19:48:53,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9483, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9743, PETRI_PLACES=388, PETRI_TRANSITIONS=656} [2024-06-03 19:48:53,226 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-03 19:48:53,226 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 656 transitions, 9743 flow [2024-06-03 19:48:53,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:53,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:53,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:53,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 19:48:53,226 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:53,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:53,227 INFO L85 PathProgramCache]: Analyzing trace with hash -106762434, now seen corresponding path program 3 times [2024-06-03 19:48:53,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:53,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561717917] [2024-06-03 19:48:53,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:53,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:54,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:54,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561717917] [2024-06-03 19:48:54,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561717917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:54,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:54,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:48:54,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037210885] [2024-06-03 19:48:54,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:54,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:48:54,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:54,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:48:54,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:48:54,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:54,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 656 transitions, 9743 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:54,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:54,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:54,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:55,664 INFO L124 PetriNetUnfolderBase]: 3983/6284 cut-off events. [2024-06-03 19:48:55,665 INFO L125 PetriNetUnfolderBase]: For 1263094/1263096 co-relation queries the response was YES. [2024-06-03 19:48:55,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71086 conditions, 6284 events. 3983/6284 cut-off events. For 1263094/1263096 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37982 event pairs, 768 based on Foata normal form. 5/6288 useless extension candidates. Maximal degree in co-relation 70900. Up to 5199 conditions per place. [2024-06-03 19:48:55,949 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 551 selfloop transitions, 137 changer transitions 0/693 dead transitions. [2024-06-03 19:48:55,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 693 transitions, 12033 flow [2024-06-03 19:48:55,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:48:55,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:48:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-03 19:48:55,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397463002114165 [2024-06-03 19:48:55,951 INFO L175 Difference]: Start difference. First operand has 388 places, 656 transitions, 9743 flow. Second operand 11 states and 208 transitions. [2024-06-03 19:48:55,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 693 transitions, 12033 flow [2024-06-03 19:48:58,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 693 transitions, 11862 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-03 19:48:58,321 INFO L231 Difference]: Finished difference. Result has 395 places, 664 transitions, 10181 flow [2024-06-03 19:48:58,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9572, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10181, PETRI_PLACES=395, PETRI_TRANSITIONS=664} [2024-06-03 19:48:58,321 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-03 19:48:58,321 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 664 transitions, 10181 flow [2024-06-03 19:48:58,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:58,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:58,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:58,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 19:48:58,322 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:58,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:58,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1474825712, now seen corresponding path program 4 times [2024-06-03 19:48:58,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:58,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942950551] [2024-06-03 19:48:58,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:58,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:59,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:59,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942950551] [2024-06-03 19:48:59,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942950551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:59,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:59,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:48:59,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793432490] [2024-06-03 19:48:59,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:59,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:48:59,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:48:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:48:59,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:59,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 664 transitions, 10181 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:59,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:59,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:59,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:00,903 INFO L124 PetriNetUnfolderBase]: 3978/6280 cut-off events. [2024-06-03 19:49:00,903 INFO L125 PetriNetUnfolderBase]: For 1264469/1264471 co-relation queries the response was YES. [2024-06-03 19:49:00,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71288 conditions, 6280 events. 3978/6280 cut-off events. For 1264469/1264471 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37988 event pairs, 768 based on Foata normal form. 5/6284 useless extension candidates. Maximal degree in co-relation 71101. Up to 5197 conditions per place. [2024-06-03 19:49:01,020 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 550 selfloop transitions, 138 changer transitions 0/693 dead transitions. [2024-06-03 19:49:01,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 693 transitions, 12149 flow [2024-06-03 19:49:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:49:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:49:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-03 19:49:01,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376321353065539 [2024-06-03 19:49:01,028 INFO L175 Difference]: Start difference. First operand has 395 places, 664 transitions, 10181 flow. Second operand 11 states and 207 transitions. [2024-06-03 19:49:01,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 693 transitions, 12149 flow [2024-06-03 19:49:03,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 693 transitions, 11643 flow, removed 151 selfloop flow, removed 7 redundant places. [2024-06-03 19:49:03,985 INFO L231 Difference]: Finished difference. Result has 399 places, 664 transitions, 9959 flow [2024-06-03 19:49:03,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9675, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9959, PETRI_PLACES=399, PETRI_TRANSITIONS=664} [2024-06-03 19:49:03,985 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-03 19:49:03,985 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 664 transitions, 9959 flow [2024-06-03 19:49:03,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:03,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:03,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:03,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 19:49:03,986 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:03,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:03,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1474437902, now seen corresponding path program 5 times [2024-06-03 19:49:03,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:03,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086286133] [2024-06-03 19:49:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:03,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:04,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:04,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086286133] [2024-06-03 19:49:04,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086286133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:04,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:04,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:49:04,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935322413] [2024-06-03 19:49:04,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:04,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:49:04,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:04,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:49:04,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:49:04,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:04,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 664 transitions, 9959 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:04,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:04,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:04,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:06,635 INFO L124 PetriNetUnfolderBase]: 3969/6268 cut-off events. [2024-06-03 19:49:06,635 INFO L125 PetriNetUnfolderBase]: For 1261028/1261030 co-relation queries the response was YES. [2024-06-03 19:49:06,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70569 conditions, 6268 events. 3969/6268 cut-off events. For 1261028/1261030 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37888 event pairs, 776 based on Foata normal form. 5/6272 useless extension candidates. Maximal degree in co-relation 70381. Up to 5190 conditions per place. [2024-06-03 19:49:06,753 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 549 selfloop transitions, 138 changer transitions 0/692 dead transitions. [2024-06-03 19:49:06,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 692 transitions, 11697 flow [2024-06-03 19:49:06,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:49:06,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:49:06,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-03 19:49:06,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397463002114165 [2024-06-03 19:49:06,754 INFO L175 Difference]: Start difference. First operand has 399 places, 664 transitions, 9959 flow. Second operand 11 states and 208 transitions. [2024-06-03 19:49:06,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 692 transitions, 11697 flow [2024-06-03 19:49:10,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 692 transitions, 11312 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-03 19:49:10,212 INFO L231 Difference]: Finished difference. Result has 402 places, 664 transitions, 9857 flow [2024-06-03 19:49:10,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9574, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9857, PETRI_PLACES=402, PETRI_TRANSITIONS=664} [2024-06-03 19:49:10,213 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-03 19:49:10,213 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 664 transitions, 9857 flow [2024-06-03 19:49:10,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:10,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:10,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:10,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 19:49:10,214 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:10,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:10,215 INFO L85 PathProgramCache]: Analyzing trace with hash 838617962, now seen corresponding path program 5 times [2024-06-03 19:49:10,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:10,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524862469] [2024-06-03 19:49:10,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:10,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:11,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:11,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524862469] [2024-06-03 19:49:11,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524862469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:11,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:11,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:49:11,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026814727] [2024-06-03 19:49:11,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:11,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:49:11,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:11,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:49:11,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:49:11,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:49:11,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 664 transitions, 9857 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:11,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:11,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:49:11,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:13,032 INFO L124 PetriNetUnfolderBase]: 3758/6038 cut-off events. [2024-06-03 19:49:13,032 INFO L125 PetriNetUnfolderBase]: For 1262779/1262797 co-relation queries the response was YES. [2024-06-03 19:49:13,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68695 conditions, 6038 events. 3758/6038 cut-off events. For 1262779/1262797 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 37482 event pairs, 860 based on Foata normal form. 18/6029 useless extension candidates. Maximal degree in co-relation 68506. Up to 4956 conditions per place. [2024-06-03 19:49:13,144 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 518 selfloop transitions, 124 changer transitions 0/690 dead transitions. [2024-06-03 19:49:13,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 690 transitions, 11239 flow [2024-06-03 19:49:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:49:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:49:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-03 19:49:13,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-03 19:49:13,151 INFO L175 Difference]: Start difference. First operand has 402 places, 664 transitions, 9857 flow. Second operand 8 states and 163 transitions. [2024-06-03 19:49:13,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 690 transitions, 11239 flow [2024-06-03 19:49:16,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 690 transitions, 10914 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-03 19:49:16,323 INFO L231 Difference]: Finished difference. Result has 404 places, 664 transitions, 9801 flow [2024-06-03 19:49:16,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9534, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9801, PETRI_PLACES=404, PETRI_TRANSITIONS=664} [2024-06-03 19:49:16,324 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-03 19:49:16,324 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 664 transitions, 9801 flow [2024-06-03 19:49:16,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:16,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:16,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:16,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 19:49:16,325 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:16,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:16,325 INFO L85 PathProgramCache]: Analyzing trace with hash 856422858, now seen corresponding path program 2 times [2024-06-03 19:49:16,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:16,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297491720] [2024-06-03 19:49:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:16,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:17,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:17,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297491720] [2024-06-03 19:49:17,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297491720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:17,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:17,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:17,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562507626] [2024-06-03 19:49:17,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:17,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:17,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:17,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:17,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:17,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:17,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 664 transitions, 9801 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:49:17,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:17,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:17,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:19,217 INFO L124 PetriNetUnfolderBase]: 3973/6241 cut-off events. [2024-06-03 19:49:19,217 INFO L125 PetriNetUnfolderBase]: For 1278370/1278372 co-relation queries the response was YES. [2024-06-03 19:49:19,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70478 conditions, 6241 events. 3973/6241 cut-off events. For 1278370/1278372 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37383 event pairs, 860 based on Foata normal form. 2/6241 useless extension candidates. Maximal degree in co-relation 70288. Up to 5477 conditions per place. [2024-06-03 19:49:19,311 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 556 selfloop transitions, 131 changer transitions 0/692 dead transitions. [2024-06-03 19:49:19,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 692 transitions, 11428 flow [2024-06-03 19:49:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:49:19,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:49:19,313 INFO L175 Difference]: Start difference. First operand has 404 places, 664 transitions, 9801 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:49:19,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 692 transitions, 11428 flow [2024-06-03 19:49:22,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 692 transitions, 11116 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 19:49:22,198 INFO L231 Difference]: Finished difference. Result has 407 places, 668 transitions, 9941 flow [2024-06-03 19:49:22,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9489, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9941, PETRI_PLACES=407, PETRI_TRANSITIONS=668} [2024-06-03 19:49:22,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-03 19:49:22,199 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 668 transitions, 9941 flow [2024-06-03 19:49:22,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:49:22,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:22,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:22,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 19:49:22,200 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:22,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:22,200 INFO L85 PathProgramCache]: Analyzing trace with hash 848004111, now seen corresponding path program 5 times [2024-06-03 19:49:22,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:22,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18677826] [2024-06-03 19:49:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:22,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:23,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:23,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18677826] [2024-06-03 19:49:23,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18677826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:23,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:23,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:23,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678780279] [2024-06-03 19:49:23,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:23,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:23,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:23,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:23,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:23,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:23,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 668 transitions, 9941 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:49:23,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:23,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:23,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:24,864 INFO L124 PetriNetUnfolderBase]: 3997/6291 cut-off events. [2024-06-03 19:49:24,864 INFO L125 PetriNetUnfolderBase]: For 1314163/1314165 co-relation queries the response was YES. [2024-06-03 19:49:24,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71192 conditions, 6291 events. 3997/6291 cut-off events. For 1314163/1314165 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 37870 event pairs, 804 based on Foata normal form. 10/6300 useless extension candidates. Maximal degree in co-relation 71001. Up to 5605 conditions per place. [2024-06-03 19:49:24,961 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 607 selfloop transitions, 86 changer transitions 0/698 dead transitions. [2024-06-03 19:49:24,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 698 transitions, 11675 flow [2024-06-03 19:49:24,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:24,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:49:24,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:49:24,962 INFO L175 Difference]: Start difference. First operand has 407 places, 668 transitions, 9941 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:49:24,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 698 transitions, 11675 flow [2024-06-03 19:49:27,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 698 transitions, 11273 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-03 19:49:27,824 INFO L231 Difference]: Finished difference. Result has 409 places, 675 transitions, 9980 flow [2024-06-03 19:49:27,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9539, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9980, PETRI_PLACES=409, PETRI_TRANSITIONS=675} [2024-06-03 19:49:27,825 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-03 19:49:27,825 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 675 transitions, 9980 flow [2024-06-03 19:49:27,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:49:27,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:27,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:27,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 19:49:27,829 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:27,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:27,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2056257549, now seen corresponding path program 6 times [2024-06-03 19:49:27,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:27,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855613472] [2024-06-03 19:49:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:27,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:28,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:28,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855613472] [2024-06-03 19:49:28,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855613472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:28,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:28,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:28,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840980247] [2024-06-03 19:49:28,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:28,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:28,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:28,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:28,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:28,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:28,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 675 transitions, 9980 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:49:28,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:28,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:28,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:30,351 INFO L124 PetriNetUnfolderBase]: 4033/6387 cut-off events. [2024-06-03 19:49:30,351 INFO L125 PetriNetUnfolderBase]: For 1323274/1323276 co-relation queries the response was YES. [2024-06-03 19:49:30,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72074 conditions, 6387 events. 4033/6387 cut-off events. For 1323274/1323276 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 38955 event pairs, 815 based on Foata normal form. 6/6392 useless extension candidates. Maximal degree in co-relation 71882. Up to 5103 conditions per place. [2024-06-03 19:49:30,468 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 516 selfloop transitions, 183 changer transitions 0/704 dead transitions. [2024-06-03 19:49:30,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 704 transitions, 12189 flow [2024-06-03 19:49:30,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:49:30,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:49:30,469 INFO L175 Difference]: Start difference. First operand has 409 places, 675 transitions, 9980 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:49:30,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 704 transitions, 12189 flow [2024-06-03 19:49:33,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 704 transitions, 11893 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-03 19:49:33,654 INFO L231 Difference]: Finished difference. Result has 412 places, 682 transitions, 10303 flow [2024-06-03 19:49:33,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9702, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10303, PETRI_PLACES=412, PETRI_TRANSITIONS=682} [2024-06-03 19:49:33,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-03 19:49:33,655 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 682 transitions, 10303 flow [2024-06-03 19:49:33,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:49:33,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:33,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:33,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 19:49:33,656 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:33,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:33,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1552849915, now seen corresponding path program 7 times [2024-06-03 19:49:33,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:33,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979732546] [2024-06-03 19:49:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:33,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:34,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:34,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979732546] [2024-06-03 19:49:34,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979732546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:34,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:34,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:34,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877026974] [2024-06-03 19:49:34,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:34,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:34,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:34,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:34,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:34,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:34,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 682 transitions, 10303 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:49:34,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:34,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:34,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:36,279 INFO L124 PetriNetUnfolderBase]: 4053/6405 cut-off events. [2024-06-03 19:49:36,279 INFO L125 PetriNetUnfolderBase]: For 1324149/1324151 co-relation queries the response was YES. [2024-06-03 19:49:36,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72535 conditions, 6405 events. 4053/6405 cut-off events. For 1324149/1324151 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 38955 event pairs, 746 based on Foata normal form. 6/6410 useless extension candidates. Maximal degree in co-relation 72342. Up to 5119 conditions per place. [2024-06-03 19:49:36,392 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 517 selfloop transitions, 186 changer transitions 0/708 dead transitions. [2024-06-03 19:49:36,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 708 transitions, 12416 flow [2024-06-03 19:49:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:36,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:49:36,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:49:36,394 INFO L175 Difference]: Start difference. First operand has 412 places, 682 transitions, 10303 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:49:36,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 708 transitions, 12416 flow [2024-06-03 19:49:39,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 708 transitions, 12157 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-03 19:49:39,673 INFO L231 Difference]: Finished difference. Result has 416 places, 686 transitions, 10559 flow [2024-06-03 19:49:39,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10051, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10559, PETRI_PLACES=416, PETRI_TRANSITIONS=686} [2024-06-03 19:49:39,673 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-03 19:49:39,673 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 686 transitions, 10559 flow [2024-06-03 19:49:39,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:49:39,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:39,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:39,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 19:49:39,674 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:39,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:39,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1552583005, now seen corresponding path program 8 times [2024-06-03 19:49:39,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:39,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832661589] [2024-06-03 19:49:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:39,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:40,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:40,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832661589] [2024-06-03 19:49:40,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832661589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:40,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:40,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:40,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926560356] [2024-06-03 19:49:40,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:40,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:40,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:40,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:40,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:40,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:40,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 686 transitions, 10559 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:49:40,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:40,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:40,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:42,140 INFO L124 PetriNetUnfolderBase]: 4041/6389 cut-off events. [2024-06-03 19:49:42,140 INFO L125 PetriNetUnfolderBase]: For 1316919/1316921 co-relation queries the response was YES. [2024-06-03 19:49:42,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72090 conditions, 6389 events. 4041/6389 cut-off events. For 1316919/1316921 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 38849 event pairs, 744 based on Foata normal form. 6/6394 useless extension candidates. Maximal degree in co-relation 71896. Up to 5111 conditions per place. [2024-06-03 19:49:42,246 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 513 selfloop transitions, 189 changer transitions 0/707 dead transitions. [2024-06-03 19:49:42,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 707 transitions, 12303 flow [2024-06-03 19:49:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:42,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:49:42,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:49:42,248 INFO L175 Difference]: Start difference. First operand has 416 places, 686 transitions, 10559 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:49:42,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 707 transitions, 12303 flow [2024-06-03 19:49:45,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 707 transitions, 11894 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-03 19:49:45,551 INFO L231 Difference]: Finished difference. Result has 418 places, 686 transitions, 10550 flow [2024-06-03 19:49:45,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10152, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10550, PETRI_PLACES=418, PETRI_TRANSITIONS=686} [2024-06-03 19:49:45,551 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-03 19:49:45,551 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 686 transitions, 10550 flow [2024-06-03 19:49:45,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:49:45,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:45,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:45,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 19:49:45,552 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:45,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:45,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1551742252, now seen corresponding path program 6 times [2024-06-03 19:49:45,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:45,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251353462] [2024-06-03 19:49:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:45,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:46,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:46,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251353462] [2024-06-03 19:49:46,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251353462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:46,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:46,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:49:46,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216670704] [2024-06-03 19:49:46,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:46,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:49:46,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:46,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:49:46,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:49:46,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:46,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 686 transitions, 10550 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:46,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:46,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:46,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:48,396 INFO L124 PetriNetUnfolderBase]: 4112/6482 cut-off events. [2024-06-03 19:49:48,396 INFO L125 PetriNetUnfolderBase]: For 1367488/1367490 co-relation queries the response was YES. [2024-06-03 19:49:48,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74314 conditions, 6482 events. 4112/6482 cut-off events. For 1367488/1367490 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 39306 event pairs, 816 based on Foata normal form. 5/6486 useless extension candidates. Maximal degree in co-relation 74120. Up to 4956 conditions per place. [2024-06-03 19:49:48,499 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 498 selfloop transitions, 219 changer transitions 0/722 dead transitions. [2024-06-03 19:49:48,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 722 transitions, 13136 flow [2024-06-03 19:49:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:49:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:49:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 19:49:48,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:49:48,500 INFO L175 Difference]: Start difference. First operand has 418 places, 686 transitions, 10550 flow. Second operand 10 states and 190 transitions. [2024-06-03 19:49:48,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 722 transitions, 13136 flow [2024-06-03 19:49:51,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 722 transitions, 12807 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:49:51,760 INFO L231 Difference]: Finished difference. Result has 421 places, 698 transitions, 11384 flow [2024-06-03 19:49:51,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10225, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11384, PETRI_PLACES=421, PETRI_TRANSITIONS=698} [2024-06-03 19:49:51,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 377 predicate places. [2024-06-03 19:49:51,761 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 698 transitions, 11384 flow [2024-06-03 19:49:51,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:51,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:51,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:51,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 19:49:51,762 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:51,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:51,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1562467012, now seen corresponding path program 7 times [2024-06-03 19:49:51,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:51,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216249479] [2024-06-03 19:49:51,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:51,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:52,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:52,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216249479] [2024-06-03 19:49:52,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216249479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:52,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:52,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:49:52,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382854705] [2024-06-03 19:49:52,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:52,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:49:52,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:52,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:49:52,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:49:52,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:52,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 698 transitions, 11384 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:52,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:52,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:52,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:54,629 INFO L124 PetriNetUnfolderBase]: 4127/6493 cut-off events. [2024-06-03 19:49:54,629 INFO L125 PetriNetUnfolderBase]: For 1382682/1382684 co-relation queries the response was YES. [2024-06-03 19:49:54,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75823 conditions, 6493 events. 4127/6493 cut-off events. For 1382682/1382684 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 39306 event pairs, 746 based on Foata normal form. 5/6497 useless extension candidates. Maximal degree in co-relation 75628. Up to 4970 conditions per place. [2024-06-03 19:49:54,728 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 504 selfloop transitions, 217 changer transitions 0/726 dead transitions. [2024-06-03 19:49:54,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 726 transitions, 13627 flow [2024-06-03 19:49:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:49:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:49:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 19:49:54,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-03 19:49:54,730 INFO L175 Difference]: Start difference. First operand has 421 places, 698 transitions, 11384 flow. Second operand 10 states and 189 transitions. [2024-06-03 19:49:54,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 726 transitions, 13627 flow [2024-06-03 19:49:58,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 726 transitions, 13278 flow, removed 139 selfloop flow, removed 6 redundant places. [2024-06-03 19:49:58,368 INFO L231 Difference]: Finished difference. Result has 425 places, 702 transitions, 11690 flow [2024-06-03 19:49:58,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11067, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11690, PETRI_PLACES=425, PETRI_TRANSITIONS=702} [2024-06-03 19:49:58,368 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-03 19:49:58,368 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 702 transitions, 11690 flow [2024-06-03 19:49:58,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:58,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:58,369 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] [2024-06-03 19:49:58,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 19:49:58,369 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:58,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:58,369 INFO L85 PathProgramCache]: Analyzing trace with hash 743964220, now seen corresponding path program 8 times [2024-06-03 19:49:58,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:58,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588037550] [2024-06-03 19:49:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:58,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:59,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:59,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588037550] [2024-06-03 19:49:59,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588037550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:59,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:59,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:49:59,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460296291] [2024-06-03 19:49:59,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:59,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:49:59,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:59,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:49:59,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:49:59,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:59,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 702 transitions, 11690 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:59,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:59,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:59,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:01,187 INFO L124 PetriNetUnfolderBase]: 4146/6526 cut-off events. [2024-06-03 19:50:01,188 INFO L125 PetriNetUnfolderBase]: For 1368622/1368624 co-relation queries the response was YES. [2024-06-03 19:50:01,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76051 conditions, 6526 events. 4146/6526 cut-off events. For 1368622/1368624 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 39543 event pairs, 738 based on Foata normal form. 5/6530 useless extension candidates. Maximal degree in co-relation 75855. Up to 4989 conditions per place. [2024-06-03 19:50:01,311 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 506 selfloop transitions, 219 changer transitions 0/730 dead transitions. [2024-06-03 19:50:01,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 730 transitions, 13921 flow [2024-06-03 19:50:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:50:01,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:50:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 19:50:01,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-03 19:50:01,313 INFO L175 Difference]: Start difference. First operand has 425 places, 702 transitions, 11690 flow. Second operand 10 states and 188 transitions. [2024-06-03 19:50:01,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 730 transitions, 13921 flow [2024-06-03 19:50:04,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 730 transitions, 13410 flow, removed 85 selfloop flow, removed 8 redundant places. [2024-06-03 19:50:04,860 INFO L231 Difference]: Finished difference. Result has 427 places, 706 transitions, 11818 flow [2024-06-03 19:50:04,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11194, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11818, PETRI_PLACES=427, PETRI_TRANSITIONS=706} [2024-06-03 19:50:04,861 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-03 19:50:04,861 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 706 transitions, 11818 flow [2024-06-03 19:50:04,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:04,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:04,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:04,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 19:50:04,862 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:04,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:04,862 INFO L85 PathProgramCache]: Analyzing trace with hash 743977240, now seen corresponding path program 9 times [2024-06-03 19:50:04,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:04,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774341170] [2024-06-03 19:50:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:04,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:05,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:05,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774341170] [2024-06-03 19:50:05,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774341170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:05,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:05,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:50:05,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467038233] [2024-06-03 19:50:05,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:05,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:50:05,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:05,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:50:05,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:50:05,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:05,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 706 transitions, 11818 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:05,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:05,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:05,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:07,733 INFO L124 PetriNetUnfolderBase]: 4141/6522 cut-off events. [2024-06-03 19:50:07,733 INFO L125 PetriNetUnfolderBase]: For 1345989/1345991 co-relation queries the response was YES. [2024-06-03 19:50:07,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75517 conditions, 6522 events. 4141/6522 cut-off events. For 1345989/1345991 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 39523 event pairs, 738 based on Foata normal form. 5/6526 useless extension candidates. Maximal degree in co-relation 75321. Up to 4987 conditions per place. [2024-06-03 19:50:07,852 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 504 selfloop transitions, 221 changer transitions 0/730 dead transitions. [2024-06-03 19:50:07,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 730 transitions, 13864 flow [2024-06-03 19:50:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:50:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:50:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-03 19:50:07,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-03 19:50:07,853 INFO L175 Difference]: Start difference. First operand has 427 places, 706 transitions, 11818 flow. Second operand 10 states and 187 transitions. [2024-06-03 19:50:07,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 730 transitions, 13864 flow [2024-06-03 19:50:11,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 730 transitions, 13206 flow, removed 149 selfloop flow, removed 8 redundant places. [2024-06-03 19:50:11,607 INFO L231 Difference]: Finished difference. Result has 429 places, 706 transitions, 11620 flow [2024-06-03 19:50:11,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11164, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11620, PETRI_PLACES=429, PETRI_TRANSITIONS=706} [2024-06-03 19:50:11,608 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-03 19:50:11,608 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 706 transitions, 11620 flow [2024-06-03 19:50:11,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:11,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:11,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:11,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 19:50:11,608 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:11,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:11,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2063886029, now seen corresponding path program 2 times [2024-06-03 19:50:11,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:11,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204205464] [2024-06-03 19:50:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:11,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:12,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:12,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204205464] [2024-06-03 19:50:12,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204205464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:12,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:12,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:50:12,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125539850] [2024-06-03 19:50:12,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:12,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:50:12,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:12,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:50:12,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:50:12,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:12,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 706 transitions, 11620 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:12,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:12,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:12,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:14,578 INFO L124 PetriNetUnfolderBase]: 4146/6520 cut-off events. [2024-06-03 19:50:14,578 INFO L125 PetriNetUnfolderBase]: For 1327773/1327783 co-relation queries the response was YES. [2024-06-03 19:50:14,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75309 conditions, 6520 events. 4146/6520 cut-off events. For 1327773/1327783 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 39495 event pairs, 1130 based on Foata normal form. 11/6530 useless extension candidates. Maximal degree in co-relation 75113. Up to 6070 conditions per place. [2024-06-03 19:50:14,702 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 678 selfloop transitions, 43 changer transitions 0/726 dead transitions. [2024-06-03 19:50:14,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 726 transitions, 13252 flow [2024-06-03 19:50:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:50:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:50:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-03 19:50:14,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-03 19:50:14,704 INFO L175 Difference]: Start difference. First operand has 429 places, 706 transitions, 11620 flow. Second operand 10 states and 168 transitions. [2024-06-03 19:50:14,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 726 transitions, 13252 flow [2024-06-03 19:50:18,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 726 transitions, 12682 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-03 19:50:18,073 INFO L231 Difference]: Finished difference. Result has 429 places, 709 transitions, 11296 flow [2024-06-03 19:50:18,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11050, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11296, PETRI_PLACES=429, PETRI_TRANSITIONS=709} [2024-06-03 19:50:18,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-03 19:50:18,074 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 709 transitions, 11296 flow [2024-06-03 19:50:18,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:18,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:18,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:18,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 19:50:18,074 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:18,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:18,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1115903078, now seen corresponding path program 7 times [2024-06-03 19:50:18,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:18,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656384291] [2024-06-03 19:50:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:18,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:19,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:19,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656384291] [2024-06-03 19:50:19,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656384291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:19,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:19,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:19,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942959160] [2024-06-03 19:50:19,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:19,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:19,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:19,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:19,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:19,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:19,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 709 transitions, 11296 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:50:19,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:19,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:19,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:20,895 INFO L124 PetriNetUnfolderBase]: 4190/6663 cut-off events. [2024-06-03 19:50:20,895 INFO L125 PetriNetUnfolderBase]: For 1421427/1421429 co-relation queries the response was YES. [2024-06-03 19:50:20,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75051 conditions, 6663 events. 4190/6663 cut-off events. For 1421427/1421429 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 41340 event pairs, 806 based on Foata normal form. 14/6674 useless extension candidates. Maximal degree in co-relation 74856. Up to 5349 conditions per place. [2024-06-03 19:50:21,010 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 555 selfloop transitions, 171 changer transitions 0/731 dead transitions. [2024-06-03 19:50:21,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 731 transitions, 13060 flow [2024-06-03 19:50:21,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:21,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:50:21,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:50:21,012 INFO L175 Difference]: Start difference. First operand has 429 places, 709 transitions, 11296 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:50:21,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 731 transitions, 13060 flow [2024-06-03 19:50:24,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 731 transitions, 12850 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-03 19:50:24,054 INFO L231 Difference]: Finished difference. Result has 430 places, 711 transitions, 11556 flow [2024-06-03 19:50:24,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11086, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11556, PETRI_PLACES=430, PETRI_TRANSITIONS=711} [2024-06-03 19:50:24,055 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-03 19:50:24,055 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 711 transitions, 11556 flow [2024-06-03 19:50:24,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:50:24,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:24,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:24,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 19:50:24,056 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:24,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:24,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1651354536, now seen corresponding path program 8 times [2024-06-03 19:50:24,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:24,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032210037] [2024-06-03 19:50:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:24,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:24,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:24,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032210037] [2024-06-03 19:50:24,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032210037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:24,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:24,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:24,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895344180] [2024-06-03 19:50:24,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:24,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:24,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:24,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:24,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:25,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:25,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 711 transitions, 11556 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:50:25,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:25,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:25,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:26,977 INFO L124 PetriNetUnfolderBase]: 4234/6737 cut-off events. [2024-06-03 19:50:26,978 INFO L125 PetriNetUnfolderBase]: For 1450906/1450908 co-relation queries the response was YES. [2024-06-03 19:50:27,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76715 conditions, 6737 events. 4234/6737 cut-off events. For 1450906/1450908 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 41899 event pairs, 818 based on Foata normal form. 14/6748 useless extension candidates. Maximal degree in co-relation 76519. Up to 5417 conditions per place. [2024-06-03 19:50:27,101 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 549 selfloop transitions, 179 changer transitions 0/733 dead transitions. [2024-06-03 19:50:27,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 733 transitions, 13328 flow [2024-06-03 19:50:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:50:27,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:50:27,102 INFO L175 Difference]: Start difference. First operand has 430 places, 711 transitions, 11556 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:50:27,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 733 transitions, 13328 flow [2024-06-03 19:50:30,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 733 transitions, 12902 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-03 19:50:30,422 INFO L231 Difference]: Finished difference. Result has 432 places, 713 transitions, 11620 flow [2024-06-03 19:50:30,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11130, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11620, PETRI_PLACES=432, PETRI_TRANSITIONS=713} [2024-06-03 19:50:30,423 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-03 19:50:30,423 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 713 transitions, 11620 flow [2024-06-03 19:50:30,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:50:30,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:30,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:30,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 19:50:30,424 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:30,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:30,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1651680966, now seen corresponding path program 9 times [2024-06-03 19:50:30,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:30,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086258902] [2024-06-03 19:50:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:30,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:31,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:31,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086258902] [2024-06-03 19:50:31,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086258902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:31,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:31,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:31,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303140629] [2024-06-03 19:50:31,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:31,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:31,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:31,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:31,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:31,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:31,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 713 transitions, 11620 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:50:31,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:31,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:31,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:33,445 INFO L124 PetriNetUnfolderBase]: 4337/6884 cut-off events. [2024-06-03 19:50:33,445 INFO L125 PetriNetUnfolderBase]: For 1547328/1547330 co-relation queries the response was YES. [2024-06-03 19:50:33,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79791 conditions, 6884 events. 4337/6884 cut-off events. For 1547328/1547330 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 42799 event pairs, 825 based on Foata normal form. 14/6895 useless extension candidates. Maximal degree in co-relation 79594. Up to 5340 conditions per place. [2024-06-03 19:50:33,560 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 551 selfloop transitions, 186 changer transitions 0/742 dead transitions. [2024-06-03 19:50:33,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 742 transitions, 13880 flow [2024-06-03 19:50:33,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:50:33,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-03 19:50:33,562 INFO L175 Difference]: Start difference. First operand has 432 places, 713 transitions, 11620 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:50:33,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 742 transitions, 13880 flow [2024-06-03 19:50:36,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 742 transitions, 13434 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-03 19:50:36,927 INFO L231 Difference]: Finished difference. Result has 434 places, 717 transitions, 11807 flow [2024-06-03 19:50:36,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11174, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11807, PETRI_PLACES=434, PETRI_TRANSITIONS=717} [2024-06-03 19:50:36,928 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-03 19:50:36,928 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 717 transitions, 11807 flow [2024-06-03 19:50:36,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:50:36,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:36,928 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] [2024-06-03 19:50:36,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 19:50:36,929 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:36,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1280456586, now seen corresponding path program 10 times [2024-06-03 19:50:36,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:36,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286336555] [2024-06-03 19:50:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:36,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:37,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:37,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286336555] [2024-06-03 19:50:37,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286336555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:37,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:37,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:37,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730892347] [2024-06-03 19:50:37,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:37,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:37,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:37,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:37,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:37,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:37,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 717 transitions, 11807 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:50:37,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:37,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:37,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:39,733 INFO L124 PetriNetUnfolderBase]: 4309/6886 cut-off events. [2024-06-03 19:50:39,733 INFO L125 PetriNetUnfolderBase]: For 1489307/1489309 co-relation queries the response was YES. [2024-06-03 19:50:39,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77981 conditions, 6886 events. 4309/6886 cut-off events. For 1489307/1489309 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 43332 event pairs, 808 based on Foata normal form. 14/6897 useless extension candidates. Maximal degree in co-relation 77783. Up to 5534 conditions per place. [2024-06-03 19:50:39,862 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 548 selfloop transitions, 184 changer transitions 0/737 dead transitions. [2024-06-03 19:50:39,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 737 transitions, 13465 flow [2024-06-03 19:50:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:50:39,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:50:39,864 INFO L175 Difference]: Start difference. First operand has 434 places, 717 transitions, 11807 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:50:39,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 737 transitions, 13465 flow [2024-06-03 19:50:43,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 737 transitions, 13063 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-03 19:50:43,437 INFO L231 Difference]: Finished difference. Result has 438 places, 717 transitions, 11779 flow [2024-06-03 19:50:43,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11405, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11779, PETRI_PLACES=438, PETRI_TRANSITIONS=717} [2024-06-03 19:50:43,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 394 predicate places. [2024-06-03 19:50:43,438 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 717 transitions, 11779 flow [2024-06-03 19:50:43,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:50:43,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:43,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:43,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 19:50:43,439 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:43,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:43,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1135146090, now seen corresponding path program 6 times [2024-06-03 19:50:43,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:43,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986612669] [2024-06-03 19:50:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:43,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:44,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:44,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986612669] [2024-06-03 19:50:44,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986612669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:44,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:44,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:50:44,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072183499] [2024-06-03 19:50:44,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:44,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:50:44,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:44,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:50:44,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:50:44,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:50:44,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 717 transitions, 11779 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:44,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:44,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:50:44,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:46,392 INFO L124 PetriNetUnfolderBase]: 4055/6518 cut-off events. [2024-06-03 19:50:46,392 INFO L125 PetriNetUnfolderBase]: For 1408557/1408579 co-relation queries the response was YES. [2024-06-03 19:50:46,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75989 conditions, 6518 events. 4055/6518 cut-off events. For 1408557/1408579 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 41034 event pairs, 913 based on Foata normal form. 21/6493 useless extension candidates. Maximal degree in co-relation 75789. Up to 5311 conditions per place. [2024-06-03 19:50:46,508 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 549 selfloop transitions, 140 changer transitions 0/742 dead transitions. [2024-06-03 19:50:46,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 742 transitions, 13388 flow [2024-06-03 19:50:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:50:46,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:50:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-03 19:50:46,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-03 19:50:46,510 INFO L175 Difference]: Start difference. First operand has 438 places, 717 transitions, 11779 flow. Second operand 7 states and 147 transitions. [2024-06-03 19:50:46,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 742 transitions, 13388 flow [2024-06-03 19:50:50,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 742 transitions, 12998 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 19:50:50,262 INFO L231 Difference]: Finished difference. Result has 437 places, 720 transitions, 11865 flow [2024-06-03 19:50:50,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11389, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11865, PETRI_PLACES=437, PETRI_TRANSITIONS=720} [2024-06-03 19:50:50,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-03 19:50:50,263 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 720 transitions, 11865 flow [2024-06-03 19:50:50,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:50,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:50,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:50,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 19:50:50,264 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:50,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:50,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1320468618, now seen corresponding path program 3 times [2024-06-03 19:50:50,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:50,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247395732] [2024-06-03 19:50:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:50,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:51,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:51,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247395732] [2024-06-03 19:50:51,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247395732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:51,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:51,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:51,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604001075] [2024-06-03 19:50:51,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:51,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:51,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:51,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:51,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 720 transitions, 11865 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:50:51,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:51,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:51,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:53,305 INFO L124 PetriNetUnfolderBase]: 4319/6763 cut-off events. [2024-06-03 19:50:53,306 INFO L125 PetriNetUnfolderBase]: For 1429231/1429231 co-relation queries the response was YES. [2024-06-03 19:50:53,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78646 conditions, 6763 events. 4319/6763 cut-off events. For 1429231/1429231 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 40875 event pairs, 935 based on Foata normal form. 1/6758 useless extension candidates. Maximal degree in co-relation 78445. Up to 6027 conditions per place. [2024-06-03 19:50:53,437 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 621 selfloop transitions, 119 changer transitions 0/745 dead transitions. [2024-06-03 19:50:53,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 745 transitions, 13577 flow [2024-06-03 19:50:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:50:53,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:50:53,439 INFO L175 Difference]: Start difference. First operand has 437 places, 720 transitions, 11865 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:50:53,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 745 transitions, 13577 flow [2024-06-03 19:50:57,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 745 transitions, 13238 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-03 19:50:57,170 INFO L231 Difference]: Finished difference. Result has 440 places, 723 transitions, 11926 flow [2024-06-03 19:50:57,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11526, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11926, PETRI_PLACES=440, PETRI_TRANSITIONS=723} [2024-06-03 19:50:57,171 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-03 19:50:57,171 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 723 transitions, 11926 flow [2024-06-03 19:50:57,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:50:57,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:57,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:57,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 19:50:57,171 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:57,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:57,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1890207754, now seen corresponding path program 7 times [2024-06-03 19:50:57,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:57,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806875433] [2024-06-03 19:50:57,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:57,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:58,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:58,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806875433] [2024-06-03 19:50:58,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806875433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:58,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:58,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:50:58,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084042511] [2024-06-03 19:50:58,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:58,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:50:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:58,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:50:58,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:50:58,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:50:58,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 723 transitions, 11926 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:58,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:58,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:50:58,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:00,103 INFO L124 PetriNetUnfolderBase]: 4070/6549 cut-off events. [2024-06-03 19:51:00,103 INFO L125 PetriNetUnfolderBase]: For 1460333/1460381 co-relation queries the response was YES. [2024-06-03 19:51:00,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76773 conditions, 6549 events. 4070/6549 cut-off events. For 1460333/1460381 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 41371 event pairs, 831 based on Foata normal form. 35/6483 useless extension candidates. Maximal degree in co-relation 76572. Up to 5141 conditions per place. [2024-06-03 19:51:00,229 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 491 selfloop transitions, 197 changer transitions 0/742 dead transitions. [2024-06-03 19:51:00,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 742 transitions, 13518 flow [2024-06-03 19:51:00,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:51:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:51:00,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-03 19:51:00,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-03 19:51:00,231 INFO L175 Difference]: Start difference. First operand has 440 places, 723 transitions, 11926 flow. Second operand 7 states and 142 transitions. [2024-06-03 19:51:00,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 742 transitions, 13518 flow [2024-06-03 19:51:03,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 742 transitions, 13140 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-03 19:51:03,747 INFO L231 Difference]: Finished difference. Result has 440 places, 726 transitions, 12134 flow [2024-06-03 19:51:03,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11548, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12134, PETRI_PLACES=440, PETRI_TRANSITIONS=726} [2024-06-03 19:51:03,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-03 19:51:03,748 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 726 transitions, 12134 flow [2024-06-03 19:51:03,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:03,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:03,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:03,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 19:51:03,748 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:03,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:03,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1674731658, now seen corresponding path program 4 times [2024-06-03 19:51:03,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:03,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043238411] [2024-06-03 19:51:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:03,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:04,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:04,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043238411] [2024-06-03 19:51:04,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043238411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:04,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:04,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:04,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771112907] [2024-06-03 19:51:04,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:04,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:04,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:04,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:04,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:05,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:51:05,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 726 transitions, 12134 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:51:05,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:05,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:51:05,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:06,877 INFO L124 PetriNetUnfolderBase]: 4337/6790 cut-off events. [2024-06-03 19:51:06,877 INFO L125 PetriNetUnfolderBase]: For 1471926/1471926 co-relation queries the response was YES. [2024-06-03 19:51:06,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80259 conditions, 6790 events. 4337/6790 cut-off events. For 1471926/1471926 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41005 event pairs, 935 based on Foata normal form. 1/6785 useless extension candidates. Maximal degree in co-relation 80057. Up to 5974 conditions per place. [2024-06-03 19:51:06,999 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 593 selfloop transitions, 158 changer transitions 0/756 dead transitions. [2024-06-03 19:51:06,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 756 transitions, 14683 flow [2024-06-03 19:51:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:51:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:51:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:51:07,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:51:07,000 INFO L175 Difference]: Start difference. First operand has 440 places, 726 transitions, 12134 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:51:07,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 756 transitions, 14683 flow [2024-06-03 19:51:11,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 756 transitions, 14194 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-03 19:51:11,260 INFO L231 Difference]: Finished difference. Result has 443 places, 735 transitions, 12455 flow [2024-06-03 19:51:11,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11653, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12455, PETRI_PLACES=443, PETRI_TRANSITIONS=735} [2024-06-03 19:51:11,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 399 predicate places. [2024-06-03 19:51:11,275 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 735 transitions, 12455 flow [2024-06-03 19:51:11,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:51:11,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:11,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:11,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 19:51:11,276 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:11,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:11,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1904007880, now seen corresponding path program 8 times [2024-06-03 19:51:11,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:11,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913440215] [2024-06-03 19:51:11,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:11,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:12,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:12,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913440215] [2024-06-03 19:51:12,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913440215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:12,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:12,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:51:12,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28181791] [2024-06-03 19:51:12,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:12,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:51:12,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:12,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:51:12,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:51:12,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:51:12,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 735 transitions, 12455 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:12,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:12,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:51:12,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:14,193 INFO L124 PetriNetUnfolderBase]: 4069/6565 cut-off events. [2024-06-03 19:51:14,194 INFO L125 PetriNetUnfolderBase]: For 1467138/1467186 co-relation queries the response was YES. [2024-06-03 19:51:14,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77536 conditions, 6565 events. 4069/6565 cut-off events. For 1467138/1467186 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41770 event pairs, 864 based on Foata normal form. 35/6488 useless extension candidates. Maximal degree in co-relation 77334. Up to 5069 conditions per place. [2024-06-03 19:51:14,321 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 481 selfloop transitions, 212 changer transitions 0/750 dead transitions. [2024-06-03 19:51:14,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 750 transitions, 14063 flow [2024-06-03 19:51:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:51:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:51:14,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 19:51:14,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-03 19:51:14,323 INFO L175 Difference]: Start difference. First operand has 443 places, 735 transitions, 12455 flow. Second operand 7 states and 139 transitions. [2024-06-03 19:51:14,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 750 transitions, 14063 flow [2024-06-03 19:51:18,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 750 transitions, 13622 flow, removed 123 selfloop flow, removed 5 redundant places. [2024-06-03 19:51:18,499 INFO L231 Difference]: Finished difference. Result has 445 places, 738 transitions, 12614 flow [2024-06-03 19:51:18,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12014, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12614, PETRI_PLACES=445, PETRI_TRANSITIONS=738} [2024-06-03 19:51:18,500 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-03 19:51:18,500 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 738 transitions, 12614 flow [2024-06-03 19:51:18,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:18,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:18,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:18,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 19:51:18,501 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:18,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:18,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1779974070, now seen corresponding path program 5 times [2024-06-03 19:51:18,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:18,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747986288] [2024-06-03 19:51:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:18,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:19,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:19,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747986288] [2024-06-03 19:51:19,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747986288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:19,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:19,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:19,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559653179] [2024-06-03 19:51:19,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:19,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:19,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:19,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:19,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:19,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:51:19,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 738 transitions, 12614 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:51:19,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:19,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:51:19,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:21,693 INFO L124 PetriNetUnfolderBase]: 4331/6784 cut-off events. [2024-06-03 19:51:21,694 INFO L125 PetriNetUnfolderBase]: For 1463105/1463105 co-relation queries the response was YES. [2024-06-03 19:51:21,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80434 conditions, 6784 events. 4331/6784 cut-off events. For 1463105/1463105 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41033 event pairs, 933 based on Foata normal form. 1/6779 useless extension candidates. Maximal degree in co-relation 80231. Up to 5967 conditions per place. [2024-06-03 19:51:21,820 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 588 selfloop transitions, 165 changer transitions 0/758 dead transitions. [2024-06-03 19:51:21,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 758 transitions, 14441 flow [2024-06-03 19:51:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:51:21,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:51:21,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:51:21,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:51:21,821 INFO L175 Difference]: Start difference. First operand has 445 places, 738 transitions, 12614 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:51:21,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 758 transitions, 14441 flow [2024-06-03 19:51:25,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 758 transitions, 13793 flow, removed 118 selfloop flow, removed 5 redundant places. [2024-06-03 19:51:25,455 INFO L231 Difference]: Finished difference. Result has 449 places, 738 transitions, 12302 flow [2024-06-03 19:51:25,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11966, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12302, PETRI_PLACES=449, PETRI_TRANSITIONS=738} [2024-06-03 19:51:25,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-03 19:51:25,456 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 738 transitions, 12302 flow [2024-06-03 19:51:25,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:51:25,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:25,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:25,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 19:51:25,456 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:25,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:25,457 INFO L85 PathProgramCache]: Analyzing trace with hash -733271606, now seen corresponding path program 6 times [2024-06-03 19:51:25,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:25,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20997441] [2024-06-03 19:51:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:25,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:26,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:26,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20997441] [2024-06-03 19:51:26,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20997441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:26,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:26,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:26,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673726644] [2024-06-03 19:51:26,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:26,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:26,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:26,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:26,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:26,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:51:26,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 738 transitions, 12302 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:51:26,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:26,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:51:26,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:28,964 INFO L124 PetriNetUnfolderBase]: 4328/6778 cut-off events. [2024-06-03 19:51:28,965 INFO L125 PetriNetUnfolderBase]: For 1471197/1471197 co-relation queries the response was YES. [2024-06-03 19:51:29,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80089 conditions, 6778 events. 4328/6778 cut-off events. For 1471197/1471197 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 40967 event pairs, 944 based on Foata normal form. 1/6773 useless extension candidates. Maximal degree in co-relation 79885. Up to 6035 conditions per place. [2024-06-03 19:51:29,139 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 638 selfloop transitions, 118 changer transitions 0/761 dead transitions. [2024-06-03 19:51:29,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 761 transitions, 13913 flow [2024-06-03 19:51:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:51:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:51:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:51:29,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:51:29,140 INFO L175 Difference]: Start difference. First operand has 449 places, 738 transitions, 12302 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:51:29,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 761 transitions, 13913 flow [2024-06-03 19:51:33,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 761 transitions, 13518 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-03 19:51:33,492 INFO L231 Difference]: Finished difference. Result has 451 places, 738 transitions, 12150 flow [2024-06-03 19:51:33,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11907, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12150, PETRI_PLACES=451, PETRI_TRANSITIONS=738} [2024-06-03 19:51:33,509 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-03 19:51:33,509 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 738 transitions, 12150 flow [2024-06-03 19:51:33,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:51:33,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:33,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:33,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 19:51:33,509 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:33,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:33,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1291774959, now seen corresponding path program 9 times [2024-06-03 19:51:33,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:33,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237212007] [2024-06-03 19:51:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:33,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:34,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:34,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237212007] [2024-06-03 19:51:34,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237212007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:34,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:34,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:34,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565940680] [2024-06-03 19:51:34,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:34,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:34,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:34,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:34,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:34,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:51:34,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 738 transitions, 12150 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:51:34,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:34,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:51:34,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:36,400 INFO L124 PetriNetUnfolderBase]: 4300/6739 cut-off events. [2024-06-03 19:51:36,400 INFO L125 PetriNetUnfolderBase]: For 1480531/1480531 co-relation queries the response was YES. [2024-06-03 19:51:36,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79155 conditions, 6739 events. 4300/6739 cut-off events. For 1480531/1480531 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 40780 event pairs, 905 based on Foata normal form. 4/6737 useless extension candidates. Maximal degree in co-relation 78950. Up to 6146 conditions per place. [2024-06-03 19:51:36,522 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 685 selfloop transitions, 69 changer transitions 0/759 dead transitions. [2024-06-03 19:51:36,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 759 transitions, 13772 flow [2024-06-03 19:51:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:51:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:51:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:51:36,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:51:36,523 INFO L175 Difference]: Start difference. First operand has 451 places, 738 transitions, 12150 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:51:36,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 759 transitions, 13772 flow [2024-06-03 19:51:41,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 759 transitions, 13370 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-03 19:51:41,234 INFO L231 Difference]: Finished difference. Result has 451 places, 738 transitions, 11896 flow [2024-06-03 19:51:41,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11748, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11896, PETRI_PLACES=451, PETRI_TRANSITIONS=738} [2024-06-03 19:51:41,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-03 19:51:41,235 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 738 transitions, 11896 flow [2024-06-03 19:51:41,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:51:41,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:41,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:41,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 19:51:41,235 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:41,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:41,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1662672909, now seen corresponding path program 10 times [2024-06-03 19:51:41,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:41,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906142504] [2024-06-03 19:51:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:41,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:42,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:42,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906142504] [2024-06-03 19:51:42,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906142504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:42,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:42,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:42,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459132385] [2024-06-03 19:51:42,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:42,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:42,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:42,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:42,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:42,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:51:42,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 738 transitions, 11896 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:51:42,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:42,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:51:42,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:43,925 INFO L124 PetriNetUnfolderBase]: 4342/6826 cut-off events. [2024-06-03 19:51:43,925 INFO L125 PetriNetUnfolderBase]: For 1519494/1519494 co-relation queries the response was YES. [2024-06-03 19:51:44,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80197 conditions, 6826 events. 4342/6826 cut-off events. For 1519494/1519494 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 41655 event pairs, 869 based on Foata normal form. 2/6822 useless extension candidates. Maximal degree in co-relation 79991. Up to 5992 conditions per place. [2024-06-03 19:51:44,045 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 644 selfloop transitions, 119 changer transitions 0/768 dead transitions. [2024-06-03 19:51:44,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 768 transitions, 14072 flow [2024-06-03 19:51:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:51:44,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:51:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:51:44,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:51:44,046 INFO L175 Difference]: Start difference. First operand has 451 places, 738 transitions, 11896 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:51:44,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 768 transitions, 14072 flow [2024-06-03 19:51:48,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 768 transitions, 13271 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-03 19:51:48,441 INFO L231 Difference]: Finished difference. Result has 451 places, 748 transitions, 11717 flow [2024-06-03 19:51:48,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11095, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11717, PETRI_PLACES=451, PETRI_TRANSITIONS=748} [2024-06-03 19:51:48,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-03 19:51:48,442 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 748 transitions, 11717 flow [2024-06-03 19:51:48,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:51:48,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:48,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:48,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 19:51:48,442 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:48,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:48,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1675559919, now seen corresponding path program 11 times [2024-06-03 19:51:48,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:48,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637636878] [2024-06-03 19:51:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:48,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:49,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:49,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637636878] [2024-06-03 19:51:49,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637636878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:49,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:49,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:49,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759873352] [2024-06-03 19:51:49,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:49,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:49,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:49,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:49,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:49,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:51:49,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 748 transitions, 11717 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:51:49,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:49,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:51:49,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:51,271 INFO L124 PetriNetUnfolderBase]: 4336/6832 cut-off events. [2024-06-03 19:51:51,272 INFO L125 PetriNetUnfolderBase]: For 1516984/1516984 co-relation queries the response was YES. [2024-06-03 19:51:51,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79927 conditions, 6832 events. 4336/6832 cut-off events. For 1516984/1516984 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41817 event pairs, 854 based on Foata normal form. 2/6828 useless extension candidates. Maximal degree in co-relation 79718. Up to 5987 conditions per place. [2024-06-03 19:51:51,392 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 639 selfloop transitions, 124 changer transitions 0/768 dead transitions. [2024-06-03 19:51:51,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 768 transitions, 13611 flow [2024-06-03 19:51:51,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:51:51,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:51:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:51:51,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:51:51,393 INFO L175 Difference]: Start difference. First operand has 451 places, 748 transitions, 11717 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:51:51,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 768 transitions, 13611 flow [2024-06-03 19:51:56,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 768 transitions, 13371 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-03 19:51:56,247 INFO L231 Difference]: Finished difference. Result has 455 places, 748 transitions, 11733 flow [2024-06-03 19:51:56,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11479, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11733, PETRI_PLACES=455, PETRI_TRANSITIONS=748} [2024-06-03 19:51:56,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-03 19:51:56,247 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 748 transitions, 11733 flow [2024-06-03 19:51:56,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:51:56,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:56,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:56,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 19:51:56,248 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:56,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1676005389, now seen corresponding path program 12 times [2024-06-03 19:51:56,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:56,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929058633] [2024-06-03 19:51:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:56,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:57,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:57,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929058633] [2024-06-03 19:51:57,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929058633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:57,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:57,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:57,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182653840] [2024-06-03 19:51:57,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:57,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:57,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:57,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:57,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:51:57,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 748 transitions, 11733 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:51:57,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:57,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:51:57,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:59,042 INFO L124 PetriNetUnfolderBase]: 4330/6824 cut-off events. [2024-06-03 19:51:59,042 INFO L125 PetriNetUnfolderBase]: For 1500528/1500528 co-relation queries the response was YES. [2024-06-03 19:51:59,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79530 conditions, 6824 events. 4330/6824 cut-off events. For 1500528/1500528 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41751 event pairs, 839 based on Foata normal form. 2/6820 useless extension candidates. Maximal degree in co-relation 79320. Up to 5982 conditions per place. [2024-06-03 19:51:59,165 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 632 selfloop transitions, 130 changer transitions 0/767 dead transitions. [2024-06-03 19:51:59,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 767 transitions, 13365 flow [2024-06-03 19:51:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:51:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:51:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:51:59,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:51:59,166 INFO L175 Difference]: Start difference. First operand has 455 places, 748 transitions, 11733 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:51:59,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 767 transitions, 13365 flow [2024-06-03 19:52:04,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 767 transitions, 13040 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-03 19:52:04,475 INFO L231 Difference]: Finished difference. Result has 457 places, 748 transitions, 11674 flow [2024-06-03 19:52:04,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11408, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11674, PETRI_PLACES=457, PETRI_TRANSITIONS=748} [2024-06-03 19:52:04,476 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-03 19:52:04,476 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 748 transitions, 11674 flow [2024-06-03 19:52:04,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:52:04,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:04,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:04,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 19:52:04,476 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:52:04,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1115779729, now seen corresponding path program 13 times [2024-06-03 19:52:04,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:04,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604291187] [2024-06-03 19:52:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:04,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:05,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:05,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604291187] [2024-06-03 19:52:05,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604291187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:05,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:05,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:52:05,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373041089] [2024-06-03 19:52:05,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:05,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:52:05,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:05,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:52:05,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:52:05,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:52:05,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 748 transitions, 11674 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:52:05,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:05,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:52:05,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:07,207 INFO L124 PetriNetUnfolderBase]: 4382/6935 cut-off events. [2024-06-03 19:52:07,207 INFO L125 PetriNetUnfolderBase]: For 1574339/1574341 co-relation queries the response was YES. [2024-06-03 19:52:07,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80933 conditions, 6935 events. 4382/6935 cut-off events. For 1574339/1574341 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 42800 event pairs, 839 based on Foata normal form. 6/6935 useless extension candidates. Maximal degree in co-relation 80723. Up to 5096 conditions per place. [2024-06-03 19:52:07,331 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 519 selfloop transitions, 251 changer transitions 0/775 dead transitions. [2024-06-03 19:52:07,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 775 transitions, 14332 flow [2024-06-03 19:52:07,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:52:07,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:52:07,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:52:07,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 19:52:07,332 INFO L175 Difference]: Start difference. First operand has 457 places, 748 transitions, 11674 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:52:07,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 775 transitions, 14332 flow [2024-06-03 19:52:12,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 775 transitions, 14103 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:52:12,435 INFO L231 Difference]: Finished difference. Result has 459 places, 756 transitions, 12190 flow [2024-06-03 19:52:12,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11445, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12190, PETRI_PLACES=459, PETRI_TRANSITIONS=756} [2024-06-03 19:52:12,436 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 415 predicate places. [2024-06-03 19:52:12,436 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 756 transitions, 12190 flow [2024-06-03 19:52:12,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:52:12,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:12,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:12,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 19:52:12,436 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:52:12,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:12,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1115512819, now seen corresponding path program 14 times [2024-06-03 19:52:12,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:12,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232949218] [2024-06-03 19:52:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:12,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:13,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:13,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232949218] [2024-06-03 19:52:13,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232949218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:13,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:13,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:52:13,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619748829] [2024-06-03 19:52:13,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:13,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:52:13,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:13,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:52:13,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:52:13,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:52:13,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 756 transitions, 12190 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:52:13,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:13,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:52:13,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:15,253 INFO L124 PetriNetUnfolderBase]: 4370/6915 cut-off events. [2024-06-03 19:52:15,254 INFO L125 PetriNetUnfolderBase]: For 1564933/1564935 co-relation queries the response was YES. [2024-06-03 19:52:15,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80982 conditions, 6915 events. 4370/6915 cut-off events. For 1564933/1564935 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 42722 event pairs, 835 based on Foata normal form. 6/6915 useless extension candidates. Maximal degree in co-relation 80771. Up to 5088 conditions per place. [2024-06-03 19:52:15,382 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 517 selfloop transitions, 252 changer transitions 0/774 dead transitions. [2024-06-03 19:52:15,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 774 transitions, 14354 flow [2024-06-03 19:52:15,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:52:15,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:52:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:52:15,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:52:15,383 INFO L175 Difference]: Start difference. First operand has 459 places, 756 transitions, 12190 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:52:15,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 774 transitions, 14354 flow [2024-06-03 19:52:20,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 774 transitions, 13758 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-03 19:52:20,842 INFO L231 Difference]: Finished difference. Result has 463 places, 756 transitions, 12108 flow [2024-06-03 19:52:20,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11594, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12108, PETRI_PLACES=463, PETRI_TRANSITIONS=756} [2024-06-03 19:52:20,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 419 predicate places. [2024-06-03 19:52:20,843 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 756 transitions, 12108 flow [2024-06-03 19:52:20,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:52:20,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:20,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:20,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 19:52:20,843 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:52:20,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:20,843 INFO L85 PathProgramCache]: Analyzing trace with hash 296288623, now seen corresponding path program 15 times [2024-06-03 19:52:20,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:20,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030261922] [2024-06-03 19:52:20,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:20,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:21,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:21,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030261922] [2024-06-03 19:52:21,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030261922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:21,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:21,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:52:21,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625533907] [2024-06-03 19:52:21,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:21,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:52:21,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:52:21,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:52:21,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:52:21,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 756 transitions, 12108 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:52:21,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:21,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:52:21,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:23,569 INFO L124 PetriNetUnfolderBase]: 4406/6967 cut-off events. [2024-06-03 19:52:23,569 INFO L125 PetriNetUnfolderBase]: For 1603876/1603878 co-relation queries the response was YES. [2024-06-03 19:52:23,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81831 conditions, 6967 events. 4406/6967 cut-off events. For 1603876/1603878 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 42977 event pairs, 841 based on Foata normal form. 6/6967 useless extension candidates. Maximal degree in co-relation 81619. Up to 5107 conditions per place. [2024-06-03 19:52:23,694 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 510 selfloop transitions, 268 changer transitions 0/783 dead transitions. [2024-06-03 19:52:23,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 783 transitions, 14596 flow [2024-06-03 19:52:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:52:23,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:52:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:52:23,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:52:23,695 INFO L175 Difference]: Start difference. First operand has 463 places, 756 transitions, 12108 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:52:23,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 783 transitions, 14596 flow [2024-06-03 19:52:29,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 783 transitions, 14105 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:52:29,342 INFO L231 Difference]: Finished difference. Result has 466 places, 765 transitions, 12510 flow [2024-06-03 19:52:29,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11627, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12510, PETRI_PLACES=466, PETRI_TRANSITIONS=765} [2024-06-03 19:52:29,342 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-03 19:52:29,342 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 765 transitions, 12510 flow [2024-06-03 19:52:29,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:52:29,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:29,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:29,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 19:52:29,343 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:52:29,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:29,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1342588555, now seen corresponding path program 16 times [2024-06-03 19:52:29,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:29,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730787312] [2024-06-03 19:52:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:29,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:30,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:30,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730787312] [2024-06-03 19:52:30,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730787312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:30,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:30,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:52:30,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964527513] [2024-06-03 19:52:30,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:30,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:52:30,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:30,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:52:30,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:52:30,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:52:30,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 765 transitions, 12510 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:52:30,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:30,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:52:30,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:32,098 INFO L124 PetriNetUnfolderBase]: 4426/7027 cut-off events. [2024-06-03 19:52:32,098 INFO L125 PetriNetUnfolderBase]: For 1631047/1631049 co-relation queries the response was YES. [2024-06-03 19:52:32,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82617 conditions, 7027 events. 4426/7027 cut-off events. For 1631047/1631049 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 43782 event pairs, 811 based on Foata normal form. 6/7027 useless extension candidates. Maximal degree in co-relation 82403. Up to 5123 conditions per place. [2024-06-03 19:52:32,229 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 511 selfloop transitions, 272 changer transitions 0/788 dead transitions. [2024-06-03 19:52:32,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 788 transitions, 15104 flow [2024-06-03 19:52:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:52:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:52:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:52:32,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:52:32,230 INFO L175 Difference]: Start difference. First operand has 466 places, 765 transitions, 12510 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:52:32,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 788 transitions, 15104 flow [2024-06-03 19:52:37,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 788 transitions, 14591 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-03 19:52:37,417 INFO L231 Difference]: Finished difference. Result has 470 places, 769 transitions, 12678 flow [2024-06-03 19:52:37,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12010, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12678, PETRI_PLACES=470, PETRI_TRANSITIONS=769} [2024-06-03 19:52:37,418 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 426 predicate places. [2024-06-03 19:52:37,418 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 769 transitions, 12678 flow [2024-06-03 19:52:37,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:52:37,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:37,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:37,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 19:52:37,418 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:52:37,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:37,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1752579389, now seen corresponding path program 17 times [2024-06-03 19:52:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:37,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772103257] [2024-06-03 19:52:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:37,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:38,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:38,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772103257] [2024-06-03 19:52:38,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772103257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:38,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:38,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:52:38,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224849649] [2024-06-03 19:52:38,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:38,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:52:38,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:38,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:52:38,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:52:38,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:52:38,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 769 transitions, 12678 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:52:38,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:38,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:52:38,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:40,298 INFO L124 PetriNetUnfolderBase]: 4452/7073 cut-off events. [2024-06-03 19:52:40,299 INFO L125 PetriNetUnfolderBase]: For 1653478/1653480 co-relation queries the response was YES. [2024-06-03 19:52:40,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83438 conditions, 7073 events. 4452/7073 cut-off events. For 1653478/1653480 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 44204 event pairs, 837 based on Foata normal form. 4/7071 useless extension candidates. Maximal degree in co-relation 83223. Up to 5138 conditions per place. [2024-06-03 19:52:40,434 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 478 selfloop transitions, 312 changer transitions 0/795 dead transitions. [2024-06-03 19:52:40,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 795 transitions, 15390 flow [2024-06-03 19:52:40,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:52:40,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:52:40,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:52:40,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:52:40,436 INFO L175 Difference]: Start difference. First operand has 470 places, 769 transitions, 12678 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:52:40,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 795 transitions, 15390 flow [2024-06-03 19:52:45,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 795 transitions, 14803 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:52:45,541 INFO L231 Difference]: Finished difference. Result has 474 places, 776 transitions, 12958 flow [2024-06-03 19:52:45,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12099, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12958, PETRI_PLACES=474, PETRI_TRANSITIONS=776} [2024-06-03 19:52:45,541 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 430 predicate places. [2024-06-03 19:52:45,541 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 776 transitions, 12958 flow [2024-06-03 19:52:45,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:52:45,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:45,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:45,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 19:52:45,542 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:52:45,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1585176639, now seen corresponding path program 18 times [2024-06-03 19:52:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:45,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626529086] [2024-06-03 19:52:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:45,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:46,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:46,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626529086] [2024-06-03 19:52:46,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626529086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:46,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:46,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:52:46,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732356846] [2024-06-03 19:52:46,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:46,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:52:46,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:46,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:52:46,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:52:46,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:52:46,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 776 transitions, 12958 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:52:46,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:46,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:52:46,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:48,226 INFO L124 PetriNetUnfolderBase]: 4462/7091 cut-off events. [2024-06-03 19:52:48,226 INFO L125 PetriNetUnfolderBase]: For 1675624/1675626 co-relation queries the response was YES. [2024-06-03 19:52:48,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83833 conditions, 7091 events. 4462/7091 cut-off events. For 1675624/1675626 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 44407 event pairs, 822 based on Foata normal form. 4/7089 useless extension candidates. Maximal degree in co-relation 83616. Up to 5144 conditions per place. [2024-06-03 19:52:48,358 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 475 selfloop transitions, 319 changer transitions 0/799 dead transitions. [2024-06-03 19:52:48,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 799 transitions, 15585 flow [2024-06-03 19:52:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:52:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:52:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:52:48,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:52:48,359 INFO L175 Difference]: Start difference. First operand has 474 places, 776 transitions, 12958 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:52:48,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 799 transitions, 15585 flow [2024-06-03 19:52:54,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 799 transitions, 15155 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:54,292 INFO L231 Difference]: Finished difference. Result has 479 places, 780 transitions, 13297 flow [2024-06-03 19:52:54,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12547, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13297, PETRI_PLACES=479, PETRI_TRANSITIONS=780} [2024-06-03 19:52:54,293 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 435 predicate places. [2024-06-03 19:52:54,293 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 780 transitions, 13297 flow [2024-06-03 19:52:54,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:52:54,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:54,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:54,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 19:52:54,293 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:52:54,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:54,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1187751697, now seen corresponding path program 19 times [2024-06-03 19:52:54,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:54,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654920862] [2024-06-03 19:52:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:54,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:55,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:55,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654920862] [2024-06-03 19:52:55,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654920862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:55,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:55,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:52:55,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097814067] [2024-06-03 19:52:55,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:55,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:52:55,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:55,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:52:55,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:52:55,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:52:55,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 780 transitions, 13297 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:52:55,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:55,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:52:55,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:57,014 INFO L124 PetriNetUnfolderBase]: 4456/7079 cut-off events. [2024-06-03 19:52:57,014 INFO L125 PetriNetUnfolderBase]: For 1681671/1681673 co-relation queries the response was YES. [2024-06-03 19:52:57,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83751 conditions, 7079 events. 4456/7079 cut-off events. For 1681671/1681673 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 44333 event pairs, 761 based on Foata normal form. 4/7077 useless extension candidates. Maximal degree in co-relation 83533. Up to 5141 conditions per place. [2024-06-03 19:52:57,149 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 471 selfloop transitions, 322 changer transitions 0/798 dead transitions. [2024-06-03 19:52:57,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 798 transitions, 15529 flow [2024-06-03 19:52:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:52:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:52:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:52:57,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:52:57,150 INFO L175 Difference]: Start difference. First operand has 479 places, 780 transitions, 13297 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:52:57,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 798 transitions, 15529 flow [2024-06-03 19:53:02,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 798 transitions, 15085 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:02,517 INFO L231 Difference]: Finished difference. Result has 484 places, 780 transitions, 13503 flow [2024-06-03 19:53:02,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12853, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13503, PETRI_PLACES=484, PETRI_TRANSITIONS=780} [2024-06-03 19:53:02,518 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 440 predicate places. [2024-06-03 19:53:02,518 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 780 transitions, 13503 flow [2024-06-03 19:53:02,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:53:02,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:02,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:02,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 19:53:02,519 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:02,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:02,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1187901427, now seen corresponding path program 20 times [2024-06-03 19:53:02,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:02,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815236522] [2024-06-03 19:53:02,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:02,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:03,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:03,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815236522] [2024-06-03 19:53:03,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815236522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:03,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:03,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:03,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786263111] [2024-06-03 19:53:03,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:03,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:03,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:03,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:03,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:03,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:53:03,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 780 transitions, 13503 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:53:03,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:03,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:53:03,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:05,263 INFO L124 PetriNetUnfolderBase]: 4444/7063 cut-off events. [2024-06-03 19:53:05,264 INFO L125 PetriNetUnfolderBase]: For 1686638/1686640 co-relation queries the response was YES. [2024-06-03 19:53:05,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83390 conditions, 7063 events. 4444/7063 cut-off events. For 1686638/1686640 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 44214 event pairs, 759 based on Foata normal form. 6/7063 useless extension candidates. Maximal degree in co-relation 83171. Up to 5133 conditions per place. [2024-06-03 19:53:05,405 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 490 selfloop transitions, 303 changer transitions 0/798 dead transitions. [2024-06-03 19:53:05,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 798 transitions, 15739 flow [2024-06-03 19:53:05,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:53:05,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:53:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:53:05,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:53:05,406 INFO L175 Difference]: Start difference. First operand has 484 places, 780 transitions, 13503 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:53:05,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 798 transitions, 15739 flow [2024-06-03 19:53:11,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 798 transitions, 15144 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 19:53:11,139 INFO L231 Difference]: Finished difference. Result has 486 places, 780 transitions, 13522 flow [2024-06-03 19:53:11,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12908, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13522, PETRI_PLACES=486, PETRI_TRANSITIONS=780} [2024-06-03 19:53:11,139 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-03 19:53:11,140 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 780 transitions, 13522 flow [2024-06-03 19:53:11,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:53:11,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:11,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:11,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 19:53:11,140 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:11,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:11,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1616265007, now seen corresponding path program 21 times [2024-06-03 19:53:11,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:11,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809861283] [2024-06-03 19:53:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:11,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:11,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:11,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809861283] [2024-06-03 19:53:11,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809861283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:11,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:11,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:11,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296532660] [2024-06-03 19:53:11,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:11,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:11,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:11,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:11,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:11,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:53:11,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 780 transitions, 13522 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:53:11,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:11,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:53:11,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:13,896 INFO L124 PetriNetUnfolderBase]: 4432/7041 cut-off events. [2024-06-03 19:53:13,896 INFO L125 PetriNetUnfolderBase]: For 1667996/1667998 co-relation queries the response was YES. [2024-06-03 19:53:13,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82815 conditions, 7041 events. 4432/7041 cut-off events. For 1667996/1667998 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 43987 event pairs, 813 based on Foata normal form. 6/7041 useless extension candidates. Maximal degree in co-relation 82595. Up to 5125 conditions per place. [2024-06-03 19:53:14,035 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 511 selfloop transitions, 282 changer transitions 0/798 dead transitions. [2024-06-03 19:53:14,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 798 transitions, 15762 flow [2024-06-03 19:53:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:53:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:53:14,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:53:14,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:53:14,036 INFO L175 Difference]: Start difference. First operand has 486 places, 780 transitions, 13522 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:53:14,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 798 transitions, 15762 flow [2024-06-03 19:53:20,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 798 transitions, 15110 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 19:53:20,061 INFO L231 Difference]: Finished difference. Result has 489 places, 780 transitions, 13441 flow [2024-06-03 19:53:20,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12870, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13441, PETRI_PLACES=489, PETRI_TRANSITIONS=780} [2024-06-03 19:53:20,061 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 445 predicate places. [2024-06-03 19:53:20,061 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 780 transitions, 13441 flow [2024-06-03 19:53:20,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:53:20,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:20,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:20,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 19:53:20,062 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:20,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:20,062 INFO L85 PathProgramCache]: Analyzing trace with hash 72978445, now seen corresponding path program 22 times [2024-06-03 19:53:20,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:20,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613453953] [2024-06-03 19:53:20,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:20,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:20,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:20,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613453953] [2024-06-03 19:53:20,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613453953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:20,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:20,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:20,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037147324] [2024-06-03 19:53:20,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:20,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:20,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:20,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:20,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:20,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:53:20,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 780 transitions, 13441 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:53:20,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:20,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:53:20,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:22,836 INFO L124 PetriNetUnfolderBase]: 4422/6995 cut-off events. [2024-06-03 19:53:22,836 INFO L125 PetriNetUnfolderBase]: For 1646199/1646201 co-relation queries the response was YES. [2024-06-03 19:53:22,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82270 conditions, 6995 events. 4422/6995 cut-off events. For 1646199/1646201 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43242 event pairs, 851 based on Foata normal form. 4/6993 useless extension candidates. Maximal degree in co-relation 82049. Up to 5117 conditions per place. [2024-06-03 19:53:22,970 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 470 selfloop transitions, 322 changer transitions 0/797 dead transitions. [2024-06-03 19:53:22,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 797 transitions, 15403 flow [2024-06-03 19:53:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:53:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:53:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:53:22,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:53:22,971 INFO L175 Difference]: Start difference. First operand has 489 places, 780 transitions, 13441 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:53:22,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 797 transitions, 15403 flow [2024-06-03 19:53:29,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 797 transitions, 14790 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-03 19:53:29,166 INFO L231 Difference]: Finished difference. Result has 491 places, 780 transitions, 13478 flow [2024-06-03 19:53:29,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12828, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13478, PETRI_PLACES=491, PETRI_TRANSITIONS=780} [2024-06-03 19:53:29,166 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 447 predicate places. [2024-06-03 19:53:29,166 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 780 transitions, 13478 flow [2024-06-03 19:53:29,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:53:29,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:29,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:29,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 19:53:29,167 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:29,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:29,167 INFO L85 PathProgramCache]: Analyzing trace with hash 85865455, now seen corresponding path program 23 times [2024-06-03 19:53:29,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:29,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290823897] [2024-06-03 19:53:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:29,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:30,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:30,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290823897] [2024-06-03 19:53:30,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290823897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:30,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:30,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:30,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300358926] [2024-06-03 19:53:30,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:30,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:30,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:30,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:30,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:30,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:53:30,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 780 transitions, 13478 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:53:30,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:30,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:53:30,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:31,971 INFO L124 PetriNetUnfolderBase]: 4412/6991 cut-off events. [2024-06-03 19:53:31,971 INFO L125 PetriNetUnfolderBase]: For 1647266/1647268 co-relation queries the response was YES. [2024-06-03 19:53:32,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82021 conditions, 6991 events. 4412/6991 cut-off events. For 1647266/1647268 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43391 event pairs, 847 based on Foata normal form. 4/6989 useless extension candidates. Maximal degree in co-relation 81799. Up to 5109 conditions per place. [2024-06-03 19:53:32,105 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 470 selfloop transitions, 322 changer transitions 0/797 dead transitions. [2024-06-03 19:53:32,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 797 transitions, 15442 flow [2024-06-03 19:53:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:53:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:53:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:53:32,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:53:32,106 INFO L175 Difference]: Start difference. First operand has 491 places, 780 transitions, 13478 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:53:32,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 797 transitions, 15442 flow [2024-06-03 19:53:38,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 797 transitions, 14390 flow, removed 52 selfloop flow, removed 14 redundant places. [2024-06-03 19:53:38,806 INFO L231 Difference]: Finished difference. Result has 486 places, 780 transitions, 13076 flow [2024-06-03 19:53:38,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12426, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13076, PETRI_PLACES=486, PETRI_TRANSITIONS=780} [2024-06-03 19:53:38,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-03 19:53:38,807 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 780 transitions, 13076 flow [2024-06-03 19:53:38,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:53:38,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:38,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:38,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 19:53:38,807 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:38,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash 86310925, now seen corresponding path program 24 times [2024-06-03 19:53:38,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:38,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600963294] [2024-06-03 19:53:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:38,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:39,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:39,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600963294] [2024-06-03 19:53:39,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600963294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:39,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:39,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:39,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368524763] [2024-06-03 19:53:39,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:39,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:39,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:39,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:39,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:39,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:53:39,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 780 transitions, 13076 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:53:39,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:39,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:53:39,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:41,627 INFO L124 PetriNetUnfolderBase]: 4402/6979 cut-off events. [2024-06-03 19:53:41,628 INFO L125 PetriNetUnfolderBase]: For 1643825/1643827 co-relation queries the response was YES. [2024-06-03 19:53:41,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81041 conditions, 6979 events. 4402/6979 cut-off events. For 1643825/1643827 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 43412 event pairs, 849 based on Foata normal form. 4/6977 useless extension candidates. Maximal degree in co-relation 80821. Up to 5101 conditions per place. [2024-06-03 19:53:41,760 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 465 selfloop transitions, 326 changer transitions 0/796 dead transitions. [2024-06-03 19:53:41,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 796 transitions, 14756 flow [2024-06-03 19:53:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:53:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:53:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:53:41,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:53:41,761 INFO L175 Difference]: Start difference. First operand has 486 places, 780 transitions, 13076 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:53:41,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 796 transitions, 14756 flow [2024-06-03 19:53:48,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 796 transitions, 13497 flow, removed 31 selfloop flow, removed 13 redundant places. [2024-06-03 19:53:48,288 INFO L231 Difference]: Finished difference. Result has 482 places, 780 transitions, 12475 flow [2024-06-03 19:53:48,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11817, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12475, PETRI_PLACES=482, PETRI_TRANSITIONS=780} [2024-06-03 19:53:48,289 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 438 predicate places. [2024-06-03 19:53:48,289 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 780 transitions, 12475 flow [2024-06-03 19:53:48,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-03 19:53:48,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:48,290 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] [2024-06-03 19:53:48,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 19:53:48,290 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:48,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:48,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1115502899, now seen corresponding path program 3 times [2024-06-03 19:53:48,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:48,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157833583] [2024-06-03 19:53:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:48,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:49,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:49,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157833583] [2024-06-03 19:53:49,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157833583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:49,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:49,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:53:49,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080603134] [2024-06-03 19:53:49,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:49,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:53:49,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:49,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:53:49,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:53:49,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:53:49,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 780 transitions, 12475 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:49,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:49,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:53:49,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:51,421 INFO L124 PetriNetUnfolderBase]: 4407/6917 cut-off events. [2024-06-03 19:53:51,422 INFO L125 PetriNetUnfolderBase]: For 1638080/1638097 co-relation queries the response was YES. [2024-06-03 19:53:51,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80708 conditions, 6917 events. 4407/6917 cut-off events. For 1638080/1638097 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 42159 event pairs, 1179 based on Foata normal form. 17/6931 useless extension candidates. Maximal degree in co-relation 80488. Up to 6422 conditions per place. [2024-06-03 19:53:51,554 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 722 selfloop transitions, 68 changer transitions 0/795 dead transitions. [2024-06-03 19:53:51,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 795 transitions, 14243 flow [2024-06-03 19:53:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:53:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:53:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-03 19:53:51,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 19:53:51,567 INFO L175 Difference]: Start difference. First operand has 482 places, 780 transitions, 12475 flow. Second operand 10 states and 170 transitions. [2024-06-03 19:53:51,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 795 transitions, 14243 flow [2024-06-03 19:53:58,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 795 transitions, 13406 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-03 19:53:58,493 INFO L231 Difference]: Finished difference. Result has 482 places, 783 transitions, 11944 flow [2024-06-03 19:53:58,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11638, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11944, PETRI_PLACES=482, PETRI_TRANSITIONS=783} [2024-06-03 19:53:58,508 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 438 predicate places. [2024-06-03 19:53:58,508 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 783 transitions, 11944 flow [2024-06-03 19:53:58,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:58,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:58,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:58,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 19:53:58,508 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:58,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:58,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1115503364, now seen corresponding path program 10 times [2024-06-03 19:53:58,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:58,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796336077] [2024-06-03 19:53:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:58,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:59,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:59,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796336077] [2024-06-03 19:53:59,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796336077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:59,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:59,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:53:59,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593820386] [2024-06-03 19:53:59,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:59,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:53:59,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:59,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:53:59,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:53:59,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:53:59,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 783 transitions, 11944 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:59,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:59,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:53:59,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:01,592 INFO L124 PetriNetUnfolderBase]: 4482/7052 cut-off events. [2024-06-03 19:54:01,592 INFO L125 PetriNetUnfolderBase]: For 1778546/1778548 co-relation queries the response was YES. [2024-06-03 19:54:01,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82626 conditions, 7052 events. 4482/7052 cut-off events. For 1778546/1778548 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 43371 event pairs, 863 based on Foata normal form. 5/7051 useless extension candidates. Maximal degree in co-relation 82405. Up to 4699 conditions per place. [2024-06-03 19:54:01,743 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 522 selfloop transitions, 291 changer transitions 0/818 dead transitions. [2024-06-03 19:54:01,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 818 transitions, 15330 flow [2024-06-03 19:54:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:54:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:54:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 19:54:01,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-03 19:54:01,745 INFO L175 Difference]: Start difference. First operand has 482 places, 783 transitions, 11944 flow. Second operand 10 states and 192 transitions. [2024-06-03 19:54:01,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 818 transitions, 15330 flow [2024-06-03 19:54:08,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 818 transitions, 15046 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-03 19:54:08,052 INFO L231 Difference]: Finished difference. Result has 485 places, 794 transitions, 12808 flow [2024-06-03 19:54:08,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11660, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12808, PETRI_PLACES=485, PETRI_TRANSITIONS=794} [2024-06-03 19:54:08,052 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 441 predicate places. [2024-06-03 19:54:08,053 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 794 transitions, 12808 flow [2024-06-03 19:54:08,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:08,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:08,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:08,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 19:54:08,053 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:08,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1615988642, now seen corresponding path program 11 times [2024-06-03 19:54:08,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:08,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778125262] [2024-06-03 19:54:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:08,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:08,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:08,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778125262] [2024-06-03 19:54:08,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778125262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:08,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:08,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:54:08,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194432508] [2024-06-03 19:54:08,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:08,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:54:08,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:08,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:54:08,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:54:09,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:54:09,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 794 transitions, 12808 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:09,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:09,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:54:09,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:11,336 INFO L124 PetriNetUnfolderBase]: 4541/7174 cut-off events. [2024-06-03 19:54:11,337 INFO L125 PetriNetUnfolderBase]: For 1878891/1878893 co-relation queries the response was YES. [2024-06-03 19:54:11,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86545 conditions, 7174 events. 4541/7174 cut-off events. For 1878891/1878893 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 44658 event pairs, 835 based on Foata normal form. 5/7173 useless extension candidates. Maximal degree in co-relation 86322. Up to 4748 conditions per place. [2024-06-03 19:54:11,472 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 514 selfloop transitions, 308 changer transitions 0/827 dead transitions. [2024-06-03 19:54:11,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 827 transitions, 16212 flow [2024-06-03 19:54:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:54:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:54:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 19:54:11,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-03 19:54:11,474 INFO L175 Difference]: Start difference. First operand has 485 places, 794 transitions, 12808 flow. Second operand 10 states and 191 transitions. [2024-06-03 19:54:11,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 827 transitions, 16212 flow [2024-06-03 19:54:17,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 827 transitions, 15635 flow, removed 155 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:17,546 INFO L231 Difference]: Finished difference. Result has 491 places, 802 transitions, 13296 flow [2024-06-03 19:54:17,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12267, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13296, PETRI_PLACES=491, PETRI_TRANSITIONS=802} [2024-06-03 19:54:17,547 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 447 predicate places. [2024-06-03 19:54:17,547 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 802 transitions, 13296 flow [2024-06-03 19:54:17,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:17,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:17,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:17,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 19:54:17,548 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:17,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:17,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2140714875, now seen corresponding path program 4 times [2024-06-03 19:54:17,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:17,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385832859] [2024-06-03 19:54:17,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:17,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:18,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:18,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385832859] [2024-06-03 19:54:18,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385832859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:18,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:18,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:54:18,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504062222] [2024-06-03 19:54:18,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:18,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:54:18,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:18,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:54:18,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:54:18,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:54:18,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 802 transitions, 13296 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:18,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:18,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:54:18,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:20,695 INFO L124 PetriNetUnfolderBase]: 4546/7119 cut-off events. [2024-06-03 19:54:20,695 INFO L125 PetriNetUnfolderBase]: For 1882890/1882907 co-relation queries the response was YES. [2024-06-03 19:54:20,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87465 conditions, 7119 events. 4546/7119 cut-off events. For 1882890/1882907 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 43595 event pairs, 1203 based on Foata normal form. 17/7133 useless extension candidates. Maximal degree in co-relation 87239. Up to 6615 conditions per place. [2024-06-03 19:54:20,841 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 742 selfloop transitions, 70 changer transitions 0/817 dead transitions. [2024-06-03 19:54:20,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 817 transitions, 15122 flow [2024-06-03 19:54:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:54:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:54:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-03 19:54:20,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930232558139535 [2024-06-03 19:54:20,869 INFO L175 Difference]: Start difference. First operand has 491 places, 802 transitions, 13296 flow. Second operand 10 states and 169 transitions. [2024-06-03 19:54:20,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 817 transitions, 15122 flow [2024-06-03 19:54:27,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 817 transitions, 14271 flow, removed 114 selfloop flow, removed 7 redundant places. [2024-06-03 19:54:27,212 INFO L231 Difference]: Finished difference. Result has 494 places, 805 transitions, 12769 flow [2024-06-03 19:54:27,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12445, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12769, PETRI_PLACES=494, PETRI_TRANSITIONS=805} [2024-06-03 19:54:27,212 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 450 predicate places. [2024-06-03 19:54:27,213 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 805 transitions, 12769 flow [2024-06-03 19:54:27,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:27,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:27,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:27,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 19:54:27,213 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:27,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:27,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1187459057, now seen corresponding path program 5 times [2024-06-03 19:54:27,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:27,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016096105] [2024-06-03 19:54:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:27,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:28,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:28,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016096105] [2024-06-03 19:54:28,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016096105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:28,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:28,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:54:28,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038645727] [2024-06-03 19:54:28,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:28,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:54:28,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:28,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:54:28,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:54:28,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:54:28,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 805 transitions, 12769 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:28,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:28,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:54:28,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:30,642 INFO L124 PetriNetUnfolderBase]: 4551/7121 cut-off events. [2024-06-03 19:54:30,642 INFO L125 PetriNetUnfolderBase]: For 1898145/1898145 co-relation queries the response was YES. [2024-06-03 19:54:30,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86453 conditions, 7121 events. 4551/7121 cut-off events. For 1898145/1898145 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 43551 event pairs, 1522 based on Foata normal form. 1/7121 useless extension candidates. Maximal degree in co-relation 86226. Up to 6697 conditions per place. [2024-06-03 19:54:30,773 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 791 selfloop transitions, 24 changer transitions 0/820 dead transitions. [2024-06-03 19:54:30,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 820 transitions, 14607 flow [2024-06-03 19:54:30,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:54:30,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:54:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-03 19:54:30,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-03 19:54:30,775 INFO L175 Difference]: Start difference. First operand has 494 places, 805 transitions, 12769 flow. Second operand 10 states and 162 transitions. [2024-06-03 19:54:30,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 820 transitions, 14607 flow [2024-06-03 19:54:36,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 820 transitions, 14305 flow, removed 83 selfloop flow, removed 8 redundant places. [2024-06-03 19:54:36,196 INFO L231 Difference]: Finished difference. Result has 496 places, 808 transitions, 12705 flow [2024-06-03 19:54:36,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12467, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12705, PETRI_PLACES=496, PETRI_TRANSITIONS=808} [2024-06-03 19:54:36,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 452 predicate places. [2024-06-03 19:54:36,197 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 808 transitions, 12705 flow [2024-06-03 19:54:36,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:36,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:36,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:36,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 19:54:36,197 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:36,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:36,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1539466396, now seen corresponding path program 12 times [2024-06-03 19:54:36,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:36,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213531939] [2024-06-03 19:54:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:36,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:37,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:37,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213531939] [2024-06-03 19:54:37,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213531939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:37,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:37,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:54:37,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771277788] [2024-06-03 19:54:37,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:37,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:54:37,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:37,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:54:37,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:54:37,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:54:37,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 808 transitions, 12705 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:37,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:37,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:54:37,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:39,226 INFO L124 PetriNetUnfolderBase]: 4614/7243 cut-off events. [2024-06-03 19:54:39,226 INFO L125 PetriNetUnfolderBase]: For 2012598/2012600 co-relation queries the response was YES. [2024-06-03 19:54:39,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88681 conditions, 7243 events. 4614/7243 cut-off events. For 2012598/2012600 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 44559 event pairs, 893 based on Foata normal form. 5/7245 useless extension candidates. Maximal degree in co-relation 88453. Up to 4821 conditions per place. [2024-06-03 19:54:39,375 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 498 selfloop transitions, 341 changer transitions 0/844 dead transitions. [2024-06-03 19:54:39,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 844 transitions, 16078 flow [2024-06-03 19:54:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:54:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:54:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 19:54:39,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-03 19:54:39,377 INFO L175 Difference]: Start difference. First operand has 496 places, 808 transitions, 12705 flow. Second operand 10 states and 192 transitions. [2024-06-03 19:54:39,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 844 transitions, 16078 flow [2024-06-03 19:54:45,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 844 transitions, 15862 flow, removed 86 selfloop flow, removed 8 redundant places. [2024-06-03 19:54:45,188 INFO L231 Difference]: Finished difference. Result has 499 places, 823 transitions, 13996 flow [2024-06-03 19:54:45,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12489, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13996, PETRI_PLACES=499, PETRI_TRANSITIONS=823} [2024-06-03 19:54:45,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 455 predicate places. [2024-06-03 19:54:45,201 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 823 transitions, 13996 flow [2024-06-03 19:54:45,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:45,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:45,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:45,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 19:54:45,202 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:45,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:45,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1187904992, now seen corresponding path program 13 times [2024-06-03 19:54:45,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:45,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132562764] [2024-06-03 19:54:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:45,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:46,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:46,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132562764] [2024-06-03 19:54:46,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132562764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:46,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:46,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:54:46,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674612546] [2024-06-03 19:54:46,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:46,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:54:46,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:46,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:54:46,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:54:46,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:54:46,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 823 transitions, 13996 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:46,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:46,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:54:46,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:48,321 INFO L124 PetriNetUnfolderBase]: 4629/7304 cut-off events. [2024-06-03 19:54:48,321 INFO L125 PetriNetUnfolderBase]: For 2049143/2049145 co-relation queries the response was YES. [2024-06-03 19:54:48,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90890 conditions, 7304 events. 4629/7304 cut-off events. For 2049143/2049145 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 45444 event pairs, 745 based on Foata normal form. 5/7303 useless extension candidates. Maximal degree in co-relation 90660. Up to 4835 conditions per place. [2024-06-03 19:54:48,471 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 495 selfloop transitions, 349 changer transitions 0/849 dead transitions. [2024-06-03 19:54:48,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 849 transitions, 17022 flow [2024-06-03 19:54:48,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:54:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:54:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 19:54:48,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:54:48,473 INFO L175 Difference]: Start difference. First operand has 499 places, 823 transitions, 13996 flow. Second operand 10 states and 190 transitions. [2024-06-03 19:54:48,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 849 transitions, 17022 flow [2024-06-03 19:54:55,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 849 transitions, 16471 flow, removed 163 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:55,338 INFO L231 Difference]: Finished difference. Result has 504 places, 828 transitions, 14482 flow [2024-06-03 19:54:55,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13487, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14482, PETRI_PLACES=504, PETRI_TRANSITIONS=828} [2024-06-03 19:54:55,339 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 460 predicate places. [2024-06-03 19:54:55,339 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 828 transitions, 14482 flow [2024-06-03 19:54:55,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:55,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:55,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:55,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 19:54:55,340 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:55,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:55,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1115516384, now seen corresponding path program 14 times [2024-06-03 19:54:55,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:55,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099273544] [2024-06-03 19:54:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:55,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:56,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:56,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099273544] [2024-06-03 19:54:56,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099273544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:56,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:56,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:54:56,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900900352] [2024-06-03 19:54:56,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:56,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:54:56,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:56,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:54:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:54:56,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:54:56,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 828 transitions, 14482 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:56,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:56,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:54:56,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:58,656 INFO L124 PetriNetUnfolderBase]: 4644/7295 cut-off events. [2024-06-03 19:54:58,657 INFO L125 PetriNetUnfolderBase]: For 2053902/2053904 co-relation queries the response was YES. [2024-06-03 19:54:58,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92082 conditions, 7295 events. 4644/7295 cut-off events. For 2053902/2053904 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 44985 event pairs, 875 based on Foata normal form. 5/7294 useless extension candidates. Maximal degree in co-relation 91850. Up to 4849 conditions per place. [2024-06-03 19:54:58,820 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 534 selfloop transitions, 315 changer transitions 0/854 dead transitions. [2024-06-03 19:54:58,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 854 transitions, 17487 flow [2024-06-03 19:54:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:54:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:54:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-03 19:54:58,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-03 19:54:58,821 INFO L175 Difference]: Start difference. First operand has 504 places, 828 transitions, 14482 flow. Second operand 10 states and 193 transitions. [2024-06-03 19:54:58,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 854 transitions, 17487 flow [2024-06-03 19:55:05,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 854 transitions, 16770 flow, removed 102 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:05,535 INFO L231 Difference]: Finished difference. Result has 508 places, 832 transitions, 14604 flow [2024-06-03 19:55:05,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13772, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14604, PETRI_PLACES=508, PETRI_TRANSITIONS=832} [2024-06-03 19:55:05,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 464 predicate places. [2024-06-03 19:55:05,536 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 832 transitions, 14604 flow [2024-06-03 19:55:05,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:05,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:05,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:05,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 19:55:05,536 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:05,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:05,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1640617872, now seen corresponding path program 15 times [2024-06-03 19:55:05,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:05,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217319647] [2024-06-03 19:55:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:05,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:06,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:06,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217319647] [2024-06-03 19:55:06,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217319647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:06,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:06,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:55:06,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572658141] [2024-06-03 19:55:06,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:06,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:55:06,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:06,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:55:06,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:55:06,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:55:06,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 832 transitions, 14604 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:06,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:06,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:55:06,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:08,876 INFO L124 PetriNetUnfolderBase]: 4635/7281 cut-off events. [2024-06-03 19:55:08,876 INFO L125 PetriNetUnfolderBase]: For 2038303/2038305 co-relation queries the response was YES. [2024-06-03 19:55:09,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91320 conditions, 7281 events. 4635/7281 cut-off events. For 2038303/2038305 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 44804 event pairs, 873 based on Foata normal form. 5/7280 useless extension candidates. Maximal degree in co-relation 91087. Up to 4842 conditions per place. [2024-06-03 19:55:09,060 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 532 selfloop transitions, 317 changer transitions 0/854 dead transitions. [2024-06-03 19:55:09,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 854 transitions, 17417 flow [2024-06-03 19:55:09,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:55:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:55:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-03 19:55:09,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-03 19:55:09,061 INFO L175 Difference]: Start difference. First operand has 508 places, 832 transitions, 14604 flow. Second operand 10 states and 194 transitions. [2024-06-03 19:55:09,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 854 transitions, 17417 flow [2024-06-03 19:55:16,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 854 transitions, 16668 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-03 19:55:16,879 INFO L231 Difference]: Finished difference. Result has 511 places, 833 transitions, 14593 flow [2024-06-03 19:55:16,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13855, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14593, PETRI_PLACES=511, PETRI_TRANSITIONS=833} [2024-06-03 19:55:16,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 467 predicate places. [2024-06-03 19:55:16,880 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 833 transitions, 14593 flow [2024-06-03 19:55:16,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:16,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:16,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:16,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 19:55:16,881 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:16,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:16,882 INFO L85 PathProgramCache]: Analyzing trace with hash -2140728360, now seen corresponding path program 16 times [2024-06-03 19:55:16,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:16,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463963838] [2024-06-03 19:55:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:16,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:17,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:17,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463963838] [2024-06-03 19:55:17,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463963838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:17,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:17,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:55:17,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625987154] [2024-06-03 19:55:17,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:17,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:55:17,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:17,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:55:17,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:55:17,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:55:17,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 833 transitions, 14593 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:17,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:17,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:55:17,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:20,694 INFO L124 PetriNetUnfolderBase]: 4650/7336 cut-off events. [2024-06-03 19:55:20,694 INFO L125 PetriNetUnfolderBase]: For 2072479/2072481 co-relation queries the response was YES. [2024-06-03 19:55:20,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91693 conditions, 7336 events. 4650/7336 cut-off events. For 2072479/2072481 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 45614 event pairs, 865 based on Foata normal form. 5/7335 useless extension candidates. Maximal degree in co-relation 91459. Up to 4856 conditions per place. [2024-06-03 19:55:20,830 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 523 selfloop transitions, 330 changer transitions 0/858 dead transitions. [2024-06-03 19:55:20,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 858 transitions, 17528 flow [2024-06-03 19:55:20,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:55:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:55:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 19:55:20,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-03 19:55:20,831 INFO L175 Difference]: Start difference. First operand has 511 places, 833 transitions, 14593 flow. Second operand 10 states and 192 transitions. [2024-06-03 19:55:20,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 858 transitions, 17528 flow [2024-06-03 19:55:27,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 858 transitions, 16776 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-03 19:55:27,163 INFO L231 Difference]: Finished difference. Result has 514 places, 837 transitions, 14713 flow [2024-06-03 19:55:27,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13847, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14713, PETRI_PLACES=514, PETRI_TRANSITIONS=837} [2024-06-03 19:55:27,164 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 470 predicate places. [2024-06-03 19:55:27,164 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 837 transitions, 14713 flow [2024-06-03 19:55:27,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:27,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:27,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:27,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 19:55:27,165 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:27,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:27,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2141103150, now seen corresponding path program 17 times [2024-06-03 19:55:27,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:27,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339015569] [2024-06-03 19:55:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:27,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:28,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:28,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339015569] [2024-06-03 19:55:28,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339015569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:28,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:28,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:55:28,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233627989] [2024-06-03 19:55:28,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:28,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:55:28,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:28,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:55:28,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:55:28,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:55:28,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 837 transitions, 14713 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:28,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:28,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:55:28,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:31,139 INFO L124 PetriNetUnfolderBase]: 4641/7322 cut-off events. [2024-06-03 19:55:31,140 INFO L125 PetriNetUnfolderBase]: For 2064082/2064084 co-relation queries the response was YES. [2024-06-03 19:55:31,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91126 conditions, 7322 events. 4641/7322 cut-off events. For 2064082/2064084 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 45578 event pairs, 868 based on Foata normal form. 5/7321 useless extension candidates. Maximal degree in co-relation 90891. Up to 4849 conditions per place. [2024-06-03 19:55:31,292 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 508 selfloop transitions, 345 changer transitions 0/858 dead transitions. [2024-06-03 19:55:31,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 858 transitions, 17451 flow [2024-06-03 19:55:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:55:31,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:55:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 19:55:31,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-03 19:55:31,293 INFO L175 Difference]: Start difference. First operand has 514 places, 837 transitions, 14713 flow. Second operand 10 states and 191 transitions. [2024-06-03 19:55:31,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 858 transitions, 17451 flow [2024-06-03 19:55:38,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 858 transitions, 16661 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-03 19:55:38,908 INFO L231 Difference]: Finished difference. Result has 517 places, 837 transitions, 14620 flow [2024-06-03 19:55:38,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13923, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14620, PETRI_PLACES=517, PETRI_TRANSITIONS=837} [2024-06-03 19:55:38,909 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 473 predicate places. [2024-06-03 19:55:38,909 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 837 transitions, 14620 flow [2024-06-03 19:55:38,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:38,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:38,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:38,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 19:55:38,910 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:38,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:38,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1712618670, now seen corresponding path program 18 times [2024-06-03 19:55:38,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:38,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520998727] [2024-06-03 19:55:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:38,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:39,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:39,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520998727] [2024-06-03 19:55:39,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520998727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:39,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:39,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:55:39,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131570087] [2024-06-03 19:55:39,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:39,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:55:39,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:39,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:55:39,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:55:39,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:55:39,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 837 transitions, 14620 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:39,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:39,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:55:39,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:42,453 INFO L124 PetriNetUnfolderBase]: 4692/7405 cut-off events. [2024-06-03 19:55:42,453 INFO L125 PetriNetUnfolderBase]: For 2127287/2127289 co-relation queries the response was YES. [2024-06-03 19:55:42,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92876 conditions, 7405 events. 4692/7405 cut-off events. For 2127287/2127289 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 46167 event pairs, 751 based on Foata normal form. 5/7404 useless extension candidates. Maximal degree in co-relation 92640. Up to 4892 conditions per place. [2024-06-03 19:55:42,593 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 503 selfloop transitions, 358 changer transitions 0/866 dead transitions. [2024-06-03 19:55:42,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 866 transitions, 17747 flow [2024-06-03 19:55:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:55:42,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:55:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 19:55:42,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:55:42,595 INFO L175 Difference]: Start difference. First operand has 517 places, 837 transitions, 14620 flow. Second operand 10 states and 190 transitions. [2024-06-03 19:55:42,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 866 transitions, 17747 flow [2024-06-03 19:55:49,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 866 transitions, 16852 flow, removed 85 selfloop flow, removed 8 redundant places. [2024-06-03 19:55:49,874 INFO L231 Difference]: Finished difference. Result has 520 places, 845 transitions, 14837 flow [2024-06-03 19:55:49,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13741, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14837, PETRI_PLACES=520, PETRI_TRANSITIONS=845} [2024-06-03 19:55:49,874 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 476 predicate places. [2024-06-03 19:55:49,874 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 845 transitions, 14837 flow [2024-06-03 19:55:49,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:49,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:49,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:49,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 19:55:49,875 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:49,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1712618205, now seen corresponding path program 6 times [2024-06-03 19:55:49,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:49,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343554772] [2024-06-03 19:55:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:49,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:51,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:51,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343554772] [2024-06-03 19:55:51,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343554772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:51,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:51,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:55:51,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958921548] [2024-06-03 19:55:51,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:51,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:55:51,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:51,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:55:51,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:55:51,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:55:51,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 845 transitions, 14837 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:51,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:51,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:55:51,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:53,654 INFO L124 PetriNetUnfolderBase]: 4697/7355 cut-off events. [2024-06-03 19:55:53,654 INFO L125 PetriNetUnfolderBase]: For 2115285/2115302 co-relation queries the response was YES. [2024-06-03 19:55:53,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93041 conditions, 7355 events. 4697/7355 cut-off events. For 2115285/2115302 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 45261 event pairs, 1224 based on Foata normal form. 17/7369 useless extension candidates. Maximal degree in co-relation 92803. Up to 6826 conditions per place. [2024-06-03 19:55:53,952 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 782 selfloop transitions, 73 changer transitions 0/860 dead transitions. [2024-06-03 19:55:53,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 860 transitions, 16761 flow [2024-06-03 19:55:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:55:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:55:53,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-03 19:55:53,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-03 19:55:53,957 INFO L175 Difference]: Start difference. First operand has 520 places, 845 transitions, 14837 flow. Second operand 10 states and 168 transitions. [2024-06-03 19:55:53,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 860 transitions, 16761 flow [2024-06-03 19:56:01,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 860 transitions, 15741 flow, removed 87 selfloop flow, removed 7 redundant places. [2024-06-03 19:56:01,520 INFO L231 Difference]: Finished difference. Result has 523 places, 848 transitions, 14159 flow [2024-06-03 19:56:01,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13817, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14159, PETRI_PLACES=523, PETRI_TRANSITIONS=848} [2024-06-03 19:56:01,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 479 predicate places. [2024-06-03 19:56:01,521 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 848 transitions, 14159 flow [2024-06-03 19:56:01,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:01,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:01,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:01,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-03 19:56:01,521 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:01,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:01,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1173159842, now seen corresponding path program 19 times [2024-06-03 19:56:01,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:01,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494246739] [2024-06-03 19:56:01,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:01,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:02,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:02,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494246739] [2024-06-03 19:56:02,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494246739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:02,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:02,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:56:02,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163876281] [2024-06-03 19:56:02,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:02,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:56:02,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:02,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:56:02,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:56:02,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:56:02,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 848 transitions, 14159 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:02,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:02,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:56:02,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:05,092 INFO L124 PetriNetUnfolderBase]: 4692/7350 cut-off events. [2024-06-03 19:56:05,092 INFO L125 PetriNetUnfolderBase]: For 2129943/2129945 co-relation queries the response was YES. [2024-06-03 19:56:05,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91040 conditions, 7350 events. 4692/7350 cut-off events. For 2129943/2129945 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 45256 event pairs, 1512 based on Foata normal form. 5/7354 useless extension candidates. Maximal degree in co-relation 90801. Up to 6743 conditions per place. [2024-06-03 19:56:05,245 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 792 selfloop transitions, 69 changer transitions 0/866 dead transitions. [2024-06-03 19:56:05,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 866 transitions, 16293 flow [2024-06-03 19:56:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:56:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:56:05,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-03 19:56:05,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-03 19:56:05,247 INFO L175 Difference]: Start difference. First operand has 523 places, 848 transitions, 14159 flow. Second operand 10 states and 177 transitions. [2024-06-03 19:56:05,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 866 transitions, 16293 flow [2024-06-03 19:56:12,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 866 transitions, 15815 flow, removed 168 selfloop flow, removed 8 redundant places. [2024-06-03 19:56:12,660 INFO L231 Difference]: Finished difference. Result has 525 places, 848 transitions, 13827 flow [2024-06-03 19:56:12,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13681, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13827, PETRI_PLACES=525, PETRI_TRANSITIONS=848} [2024-06-03 19:56:12,661 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 481 predicate places. [2024-06-03 19:56:12,661 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 848 transitions, 13827 flow [2024-06-03 19:56:12,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:12,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:12,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:12,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-03 19:56:12,662 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:12,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:12,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1172654387, now seen corresponding path program 7 times [2024-06-03 19:56:12,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:12,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037757612] [2024-06-03 19:56:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:12,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:13,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:13,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037757612] [2024-06-03 19:56:13,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037757612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:13,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:13,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:56:13,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512127673] [2024-06-03 19:56:13,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:13,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:56:13,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:13,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:56:13,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:56:13,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:56:13,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 848 transitions, 13827 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:13,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:13,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:56:13,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:16,371 INFO L124 PetriNetUnfolderBase]: 4689/7333 cut-off events. [2024-06-03 19:56:16,372 INFO L125 PetriNetUnfolderBase]: For 2122805/2122805 co-relation queries the response was YES. [2024-06-03 19:56:16,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90556 conditions, 7333 events. 4689/7333 cut-off events. For 2122805/2122805 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 44952 event pairs, 1542 based on Foata normal form. 1/7333 useless extension candidates. Maximal degree in co-relation 90316. Up to 6885 conditions per place. [2024-06-03 19:56:16,520 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 829 selfloop transitions, 30 changer transitions 0/864 dead transitions. [2024-06-03 19:56:16,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 864 transitions, 15767 flow [2024-06-03 19:56:16,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:56:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:56:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-03 19:56:16,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37420718816067655 [2024-06-03 19:56:16,521 INFO L175 Difference]: Start difference. First operand has 525 places, 848 transitions, 13827 flow. Second operand 11 states and 177 transitions. [2024-06-03 19:56:16,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 864 transitions, 15767 flow [2024-06-03 19:56:24,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 864 transitions, 14633 flow, removed 22 selfloop flow, removed 14 redundant places. [2024-06-03 19:56:24,646 INFO L231 Difference]: Finished difference. Result has 522 places, 851 transitions, 12955 flow [2024-06-03 19:56:24,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12693, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=818, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12955, PETRI_PLACES=522, PETRI_TRANSITIONS=851} [2024-06-03 19:56:24,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 478 predicate places. [2024-06-03 19:56:24,647 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 851 transitions, 12955 flow [2024-06-03 19:56:24,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:24,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:24,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:24,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-03 19:56:24,647 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)] === [2024-06-03 19:56:24,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1682919636, now seen corresponding path program 1 times [2024-06-03 19:56:24,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:24,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621993614] [2024-06-03 19:56:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:24,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:25,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:25,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621993614] [2024-06-03 19:56:25,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621993614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:25,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:25,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:25,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200161179] [2024-06-03 19:56:25,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:25,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:25,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:25,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:25,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:25,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:56:25,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 851 transitions, 12955 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:25,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:25,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:56:25,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:28,391 INFO L124 PetriNetUnfolderBase]: 4511/7158 cut-off events. [2024-06-03 19:56:28,391 INFO L125 PetriNetUnfolderBase]: For 2173383/2173383 co-relation queries the response was YES. [2024-06-03 19:56:28,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87753 conditions, 7158 events. 4511/7158 cut-off events. For 2173383/2173383 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 44884 event pairs, 1394 based on Foata normal form. 2/7150 useless extension candidates. Maximal degree in co-relation 87516. Up to 6371 conditions per place. [2024-06-03 19:56:28,546 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 802 selfloop transitions, 18 changer transitions 0/876 dead transitions. [2024-06-03 19:56:28,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 876 transitions, 14743 flow [2024-06-03 19:56:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:56:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:56:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:56:28,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:56:28,548 INFO L175 Difference]: Start difference. First operand has 522 places, 851 transitions, 12955 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:56:28,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 876 transitions, 14743 flow [2024-06-03 19:56:36,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 876 transitions, 14503 flow, removed 92 selfloop flow, removed 9 redundant places. [2024-06-03 19:56:36,483 INFO L231 Difference]: Finished difference. Result has 522 places, 853 transitions, 12844 flow [2024-06-03 19:56:36,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12715, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=833, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12844, PETRI_PLACES=522, PETRI_TRANSITIONS=853} [2024-06-03 19:56:36,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 478 predicate places. [2024-06-03 19:56:36,484 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 853 transitions, 12844 flow [2024-06-03 19:56:36,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:36,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:36,484 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] [2024-06-03 19:56:36,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-03 19:56:36,484 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:36,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1903582870, now seen corresponding path program 2 times [2024-06-03 19:56:36,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:36,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085256428] [2024-06-03 19:56:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:36,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:37,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:37,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085256428] [2024-06-03 19:56:37,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085256428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:37,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:37,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:37,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71626023] [2024-06-03 19:56:37,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:37,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:37,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:37,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:37,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:37,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:56:37,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 853 transitions, 12844 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:37,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:37,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:56:37,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:39,889 INFO L124 PetriNetUnfolderBase]: 4519/7170 cut-off events. [2024-06-03 19:56:39,890 INFO L125 PetriNetUnfolderBase]: For 2195257/2195257 co-relation queries the response was YES. [2024-06-03 19:56:39,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88032 conditions, 7170 events. 4519/7170 cut-off events. For 2195257/2195257 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 44987 event pairs, 1433 based on Foata normal form. 2/7162 useless extension candidates. Maximal degree in co-relation 87794. Up to 6405 conditions per place. [2024-06-03 19:56:40,220 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 796 selfloop transitions, 21 changer transitions 0/873 dead transitions. [2024-06-03 19:56:40,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 873 transitions, 14616 flow [2024-06-03 19:56:40,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:56:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:56:40,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-03 19:56:40,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-03 19:56:40,221 INFO L175 Difference]: Start difference. First operand has 522 places, 853 transitions, 12844 flow. Second operand 10 states and 174 transitions. [2024-06-03 19:56:40,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 873 transitions, 14616 flow [2024-06-03 19:56:47,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 873 transitions, 14503 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-03 19:56:47,686 INFO L231 Difference]: Finished difference. Result has 525 places, 855 transitions, 12870 flow [2024-06-03 19:56:47,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12731, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12870, PETRI_PLACES=525, PETRI_TRANSITIONS=855} [2024-06-03 19:56:47,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 481 predicate places. [2024-06-03 19:56:47,687 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 855 transitions, 12870 flow [2024-06-03 19:56:47,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:47,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:47,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:47,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-03 19:56:47,688 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:47,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:47,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1903730740, now seen corresponding path program 3 times [2024-06-03 19:56:47,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:47,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516585364] [2024-06-03 19:56:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:47,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:48,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:48,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516585364] [2024-06-03 19:56:48,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516585364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:48,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:48,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:48,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296890918] [2024-06-03 19:56:48,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:48,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:48,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:48,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:48,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:48,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:56:48,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 855 transitions, 12870 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:48,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:48,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:56:48,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:51,057 INFO L124 PetriNetUnfolderBase]: 4527/7182 cut-off events. [2024-06-03 19:56:51,057 INFO L125 PetriNetUnfolderBase]: For 2223980/2223980 co-relation queries the response was YES. [2024-06-03 19:56:51,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88330 conditions, 7182 events. 4527/7182 cut-off events. For 2223980/2223980 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 45054 event pairs, 1431 based on Foata normal form. 2/7174 useless extension candidates. Maximal degree in co-relation 88091. Up to 6403 conditions per place. [2024-06-03 19:56:51,190 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 797 selfloop transitions, 23 changer transitions 0/876 dead transitions. [2024-06-03 19:56:51,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 876 transitions, 14654 flow [2024-06-03 19:56:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:56:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:56:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:56:51,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:56:51,191 INFO L175 Difference]: Start difference. First operand has 525 places, 855 transitions, 12870 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:56:51,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 876 transitions, 14654 flow [2024-06-03 19:56:57,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 876 transitions, 14503 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-03 19:56:57,926 INFO L231 Difference]: Finished difference. Result has 526 places, 857 transitions, 12866 flow [2024-06-03 19:56:57,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12719, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12866, PETRI_PLACES=526, PETRI_TRANSITIONS=857} [2024-06-03 19:56:57,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 482 predicate places. [2024-06-03 19:56:57,927 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 857 transitions, 12866 flow [2024-06-03 19:56:57,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:57,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:57,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:57,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-03 19:56:57,927 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:57,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:57,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1830619446, now seen corresponding path program 4 times [2024-06-03 19:56:57,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:57,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750331856] [2024-06-03 19:56:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:57,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:59,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:59,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750331856] [2024-06-03 19:56:59,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750331856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:59,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:59,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:59,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727113933] [2024-06-03 19:56:59,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:59,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:59,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:59,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:59,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:59,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:56:59,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 857 transitions, 12866 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:59,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:59,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:56:59,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:01,565 INFO L124 PetriNetUnfolderBase]: 4540/7205 cut-off events. [2024-06-03 19:57:01,565 INFO L125 PetriNetUnfolderBase]: For 2249810/2249810 co-relation queries the response was YES. [2024-06-03 19:57:01,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88597 conditions, 7205 events. 4540/7205 cut-off events. For 2249810/2249810 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 45241 event pairs, 1429 based on Foata normal form. 2/7193 useless extension candidates. Maximal degree in co-relation 88358. Up to 6436 conditions per place. [2024-06-03 19:57:01,707 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 799 selfloop transitions, 23 changer transitions 0/878 dead transitions. [2024-06-03 19:57:01,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 878 transitions, 14697 flow [2024-06-03 19:57:01,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:57:01,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:57:01,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:57:01,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-03 19:57:01,708 INFO L175 Difference]: Start difference. First operand has 526 places, 857 transitions, 12866 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:57:01,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 878 transitions, 14697 flow [2024-06-03 19:57:08,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 878 transitions, 14566 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-03 19:57:08,771 INFO L231 Difference]: Finished difference. Result has 529 places, 863 transitions, 12945 flow [2024-06-03 19:57:08,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12735, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12945, PETRI_PLACES=529, PETRI_TRANSITIONS=863} [2024-06-03 19:57:08,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 485 predicate places. [2024-06-03 19:57:08,771 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 863 transitions, 12945 flow [2024-06-03 19:57:08,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:08,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:08,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:08,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-03 19:57:08,772 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:08,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:08,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1670299250, now seen corresponding path program 5 times [2024-06-03 19:57:08,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:08,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057629246] [2024-06-03 19:57:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:08,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:09,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:09,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057629246] [2024-06-03 19:57:09,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057629246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:09,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:09,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:57:09,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324915541] [2024-06-03 19:57:09,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:09,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:57:09,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:09,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:57:09,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:57:09,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:57:09,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 863 transitions, 12945 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:09,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:09,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:57:09,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:12,405 INFO L124 PetriNetUnfolderBase]: 4548/7217 cut-off events. [2024-06-03 19:57:12,405 INFO L125 PetriNetUnfolderBase]: For 2277802/2277802 co-relation queries the response was YES. [2024-06-03 19:57:12,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89322 conditions, 7217 events. 4548/7217 cut-off events. For 2277802/2277802 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 45304 event pairs, 1431 based on Foata normal form. 2/7205 useless extension candidates. Maximal degree in co-relation 89081. Up to 6448 conditions per place. [2024-06-03 19:57:12,546 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 801 selfloop transitions, 25 changer transitions 0/882 dead transitions. [2024-06-03 19:57:12,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 882 transitions, 14767 flow [2024-06-03 19:57:12,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:57:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:57:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:57:12,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-03 19:57:12,547 INFO L175 Difference]: Start difference. First operand has 529 places, 863 transitions, 12945 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:57:12,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 882 transitions, 14767 flow