./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix006.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/mix006.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/mix006.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix006.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-76401ed-m [2024-06-20 15:45:32,129 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:45:32,189 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:45:32,194 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:45:32,195 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:45:32,236 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:45:32,237 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:45:32,237 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:45:32,238 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:45:32,241 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:45:32,241 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:45:32,241 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:45:32,242 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:45:32,243 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:45:32,243 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:45:32,243 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:45:32,243 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:45:32,244 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:45:32,244 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:45:32,244 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:45:32,244 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:45:32,245 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:45:32,245 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:45:32,245 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:45:32,245 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:45:32,245 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:45:32,246 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:45:32,246 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:45:32,246 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:45:32,246 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:45:32,247 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:45:32,247 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:45:32,247 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:45:32,248 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:45:32,248 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:45:32,248 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:45:32,248 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:45:32,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:45:32,248 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:45:32,249 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:45:32,249 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:45:32,249 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:45:32,249 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:45:32,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:45:32,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:45:32,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:45:32,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:45:32,472 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:45:32,473 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:45:32,474 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix006.opt.yml/witness.yml [2024-06-20 15:45:32,593 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:45:32,593 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:45:32,594 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix006.opt.i [2024-06-20 15:45:33,586 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:45:33,814 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:45:33,818 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix006.opt.i [2024-06-20 15:45:33,836 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2812dba15/94e8232a091f4799ad239305abb7d590/FLAG1c941dee6 [2024-06-20 15:45:33,852 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2812dba15/94e8232a091f4799ad239305abb7d590 [2024-06-20 15:45:33,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:45:33,854 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:45:33,856 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:45:33,856 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:45:33,860 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:45:33,861 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:45:32" (1/2) ... [2024-06-20 15:45:33,861 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35088a04 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:45:33, skipping insertion in model container [2024-06-20 15:45:33,862 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:45:32" (1/2) ... [2024-06-20 15:45:33,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@40f76053 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:45:33, skipping insertion in model container [2024-06-20 15:45:33,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:45:33" (2/2) ... [2024-06-20 15:45:33,864 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35088a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:33, skipping insertion in model container [2024-06-20 15:45:33,864 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:45:33" (2/2) ... [2024-06-20 15:45:33,864 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:45:33,941 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:45:33,942 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-20 15:45:33,942 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-20 15:45:33,942 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-20 15:45:33,942 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:45:33,943 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-20 15:45:33,982 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:45:34,258 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:45:34,268 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:45:34,404 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:45:34,433 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:45:34,433 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:34 WrapperNode [2024-06-20 15:45:34,433 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:45:34,435 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:45:34,435 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:45:34,435 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:45:34,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:34" (1/1) ... [2024-06-20 15:45:34,459 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:34" (1/1) ... [2024-06-20 15:45:34,484 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 149 [2024-06-20 15:45:34,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:45:34,485 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:45:34,485 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:45:34,485 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:45:34,499 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:34" (1/1) ... [2024-06-20 15:45:34,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:34" (1/1) ... [2024-06-20 15:45:34,502 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:34" (1/1) ... [2024-06-20 15:45:34,515 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]. [2024-06-20 15:45:34,516 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:34" (1/1) ... [2024-06-20 15:45:34,516 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:34" (1/1) ... [2024-06-20 15:45:34,524 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:34" (1/1) ... [2024-06-20 15:45:34,526 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:34" (1/1) ... [2024-06-20 15:45:34,528 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:34" (1/1) ... [2024-06-20 15:45:34,530 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:34" (1/1) ... [2024-06-20 15:45:34,533 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:45:34,534 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:45:34,534 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:45:34,534 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:45:34,535 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:34" (1/1) ... [2024-06-20 15:45:34,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:45:34,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:45:34,591 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) [2024-06-20 15:45:34,614 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 [2024-06-20 15:45:34,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:45:34,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:45:34,627 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:45:34,627 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:45:34,627 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:45:34,628 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:45:34,628 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:45:34,628 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:45:34,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:45:34,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:45:34,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:45:34,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:45:34,630 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:45:34,754 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:45:34,756 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:45:35,183 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:45:35,184 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:45:35,322 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:45:35,322 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:45:35,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:45:35 BoogieIcfgContainer [2024-06-20 15:45:35,323 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:45:35,325 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:45:35,325 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:45:35,328 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:45:35,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:45:32" (1/4) ... [2024-06-20 15:45:35,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292890c4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:45:35, skipping insertion in model container [2024-06-20 15:45:35,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:45:33" (2/4) ... [2024-06-20 15:45:35,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292890c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:45:35, skipping insertion in model container [2024-06-20 15:45:35,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:45:34" (3/4) ... [2024-06-20 15:45:35,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292890c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:45:35, skipping insertion in model container [2024-06-20 15:45:35,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:45:35" (4/4) ... [2024-06-20 15:45:35,331 INFO L112 eAbstractionObserver]: Analyzing ICFG mix006.opt.i [2024-06-20 15:45:35,345 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:45:35,345 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:45:35,345 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:45:35,385 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:45:35,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 15:45:35,441 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 15:45:35,441 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:45:35,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:45:35,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 15:45:35,446 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 15:45:35,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:45:35,460 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;@1de5c0d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:45:35,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:45:35,471 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:45:35,471 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:45:35,471 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:45:35,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:35,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:45:35,472 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)] === [2024-06-20 15:45:35,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:35,476 INFO L85 PathProgramCache]: Analyzing trace with hash 398955286, now seen corresponding path program 1 times [2024-06-20 15:45:35,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:35,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422177014] [2024-06-20 15:45:35,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:35,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:36,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:36,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422177014] [2024-06-20 15:45:36,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422177014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:36,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:36,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:45:36,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664062941] [2024-06-20 15:45:36,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:36,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:45:36,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:36,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:45:36,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:45:36,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-20 15:45:36,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:36,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:36,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-20 15:45:36,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:36,889 INFO L124 PetriNetUnfolderBase]: 1116/1776 cut-off events. [2024-06-20 15:45:36,889 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-20 15:45:36,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3527 conditions, 1776 events. 1116/1776 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8974 event pairs, 765 based on Foata normal form. 1/1713 useless extension candidates. Maximal degree in co-relation 3515. Up to 1676 conditions per place. [2024-06-20 15:45:36,904 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-20 15:45:36,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 171 flow [2024-06-20 15:45:36,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:45:36,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:45:36,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-20 15:45:36,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-20 15:45:36,915 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 80 transitions. [2024-06-20 15:45:36,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 171 flow [2024-06-20 15:45:36,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:45:36,920 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 15:45:36,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-20 15:45:36,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 15:45:36,924 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 15:45:36,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:36,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:36,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:36,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:45:36,925 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)] === [2024-06-20 15:45:36,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:36,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1144019377, now seen corresponding path program 1 times [2024-06-20 15:45:36,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:36,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298776746] [2024-06-20 15:45:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:36,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:37,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:37,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298776746] [2024-06-20 15:45:37,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298776746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:37,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:37,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:45:37,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732678786] [2024-06-20 15:45:37,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:37,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:45:37,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:37,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:45:37,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:45:37,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-20 15:45:37,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:37,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:37,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-20 15:45:37,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:37,828 INFO L124 PetriNetUnfolderBase]: 1280/1982 cut-off events. [2024-06-20 15:45:37,829 INFO L125 PetriNetUnfolderBase]: For 401/401 co-relation queries the response was YES. [2024-06-20 15:45:37,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4503 conditions, 1982 events. 1280/1982 cut-off events. For 401/401 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9782 event pairs, 750 based on Foata normal form. 3/1979 useless extension candidates. Maximal degree in co-relation 4491. Up to 1897 conditions per place. [2024-06-20 15:45:37,839 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-20 15:45:37,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 240 flow [2024-06-20 15:45:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:45:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:45:37,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-20 15:45:37,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-20 15:45:37,843 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 101 transitions. [2024-06-20 15:45:37,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 240 flow [2024-06-20 15:45:37,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:45:37,845 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 15:45:37,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-20 15:45:37,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 15:45:37,846 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 15:45:37,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:37,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:37,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:37,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:45:37,849 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)] === [2024-06-20 15:45:37,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:37,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1104863043, now seen corresponding path program 1 times [2024-06-20 15:45:37,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:37,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465535814] [2024-06-20 15:45:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:37,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:38,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:38,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465535814] [2024-06-20 15:45:38,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465535814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:38,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:38,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:45:38,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663721187] [2024-06-20 15:45:38,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:38,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:45:38,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:38,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:45:38,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:45:38,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-20 15:45:38,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:38,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:38,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-20 15:45:38,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:38,812 INFO L124 PetriNetUnfolderBase]: 1568/2406 cut-off events. [2024-06-20 15:45:38,812 INFO L125 PetriNetUnfolderBase]: For 1364/1364 co-relation queries the response was YES. [2024-06-20 15:45:38,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6039 conditions, 2406 events. 1568/2406 cut-off events. For 1364/1364 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11887 event pairs, 669 based on Foata normal form. 5/2408 useless extension candidates. Maximal degree in co-relation 6025. Up to 2248 conditions per place. [2024-06-20 15:45:38,822 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-20 15:45:38,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 396 flow [2024-06-20 15:45:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:45:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:45:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-20 15:45:38,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-20 15:45:38,824 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 128 transitions. [2024-06-20 15:45:38,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 396 flow [2024-06-20 15:45:38,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 382 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:45:38,827 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-20 15:45:38,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-20 15:45:38,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-20 15:45:38,828 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-20 15:45:38,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:38,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:38,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:38,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:45:38,829 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)] === [2024-06-20 15:45:38,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:38,829 INFO L85 PathProgramCache]: Analyzing trace with hash -801262658, now seen corresponding path program 1 times [2024-06-20 15:45:38,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:38,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374474938] [2024-06-20 15:45:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:38,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:39,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:39,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374474938] [2024-06-20 15:45:39,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374474938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:39,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:39,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:45:39,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119883970] [2024-06-20 15:45:39,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:39,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:45:39,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:39,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:45:39,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:45:39,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-20 15:45:39,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:39,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:39,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-20 15:45:39,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:39,938 INFO L124 PetriNetUnfolderBase]: 1580/2426 cut-off events. [2024-06-20 15:45:39,938 INFO L125 PetriNetUnfolderBase]: For 3226/3228 co-relation queries the response was YES. [2024-06-20 15:45:39,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7183 conditions, 2426 events. 1580/2426 cut-off events. For 3226/3228 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12009 event pairs, 481 based on Foata normal form. 12/2435 useless extension candidates. Maximal degree in co-relation 7166. Up to 2216 conditions per place. [2024-06-20 15:45:39,951 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 57 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-20 15:45:39,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 499 flow [2024-06-20 15:45:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:45:39,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:45:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 15:45:39,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:45:39,954 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 147 transitions. [2024-06-20 15:45:39,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 499 flow [2024-06-20 15:45:39,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 82 transitions, 491 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-20 15:45:39,961 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-20 15:45:39,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-20 15:45:39,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-20 15:45:39,962 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-20 15:45:39,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:39,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:39,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:39,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:45:39,963 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)] === [2024-06-20 15:45:39,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:39,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1011703320, now seen corresponding path program 1 times [2024-06-20 15:45:39,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:39,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602419272] [2024-06-20 15:45:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:39,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:40,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:40,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602419272] [2024-06-20 15:45:40,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602419272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:40,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:40,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:45:40,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077855421] [2024-06-20 15:45:40,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:40,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:45:40,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:40,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:45:40,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:45:40,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:45:40,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:40,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:40,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:45:40,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:41,090 INFO L124 PetriNetUnfolderBase]: 1368/2159 cut-off events. [2024-06-20 15:45:41,091 INFO L125 PetriNetUnfolderBase]: For 4097/4097 co-relation queries the response was YES. [2024-06-20 15:45:41,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6930 conditions, 2159 events. 1368/2159 cut-off events. For 4097/4097 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10907 event pairs, 562 based on Foata normal form. 2/2140 useless extension candidates. Maximal degree in co-relation 6909. Up to 2036 conditions per place. [2024-06-20 15:45:41,102 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 49 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2024-06-20 15:45:41,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 435 flow [2024-06-20 15:45:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:45:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:45:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-20 15:45:41,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-20 15:45:41,104 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 100 transitions. [2024-06-20 15:45:41,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 435 flow [2024-06-20 15:45:41,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 385 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:45:41,107 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-20 15:45:41,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, 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=57, PETRI_TRANSITIONS=52} [2024-06-20 15:45:41,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-20 15:45:41,108 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-20 15:45:41,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:41,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:41,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:41,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:45:41,111 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)] === [2024-06-20 15:45:41,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:41,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1325736148, now seen corresponding path program 1 times [2024-06-20 15:45:41,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:41,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242420730] [2024-06-20 15:45:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:41,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:41,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:41,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242420730] [2024-06-20 15:45:41,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242420730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:41,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:41,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:45:41,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490279266] [2024-06-20 15:45:41,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:41,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:45:41,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:41,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:45:41,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:45:41,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:45:41,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:41,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:41,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:45:41,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:42,303 INFO L124 PetriNetUnfolderBase]: 1358/2171 cut-off events. [2024-06-20 15:45:42,304 INFO L125 PetriNetUnfolderBase]: For 4747/4747 co-relation queries the response was YES. [2024-06-20 15:45:42,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6938 conditions, 2171 events. 1358/2171 cut-off events. For 4747/4747 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11000 event pairs, 526 based on Foata normal form. 4/2166 useless extension candidates. Maximal degree in co-relation 6915. Up to 2004 conditions per place. [2024-06-20 15:45:42,316 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-06-20 15:45:42,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 71 transitions, 455 flow [2024-06-20 15:45:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:45:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:45:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-20 15:45:42,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-20 15:45:42,317 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 119 transitions. [2024-06-20 15:45:42,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 71 transitions, 455 flow [2024-06-20 15:45:42,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 433 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:45:42,321 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 299 flow [2024-06-20 15:45:42,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, 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=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-20 15:45:42,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-20 15:45:42,322 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 299 flow [2024-06-20 15:45:42,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:42,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:42,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:42,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:45:42,322 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)] === [2024-06-20 15:45:42,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:42,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1846131877, now seen corresponding path program 1 times [2024-06-20 15:45:42,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:42,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919206299] [2024-06-20 15:45:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:42,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:42,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:42,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919206299] [2024-06-20 15:45:42,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919206299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:42,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:42,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:45:42,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398896024] [2024-06-20 15:45:42,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:42,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:45:42,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:42,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:45:42,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:45:42,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:45:42,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:42,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:42,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:45:42,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:43,421 INFO L124 PetriNetUnfolderBase]: 1571/2394 cut-off events. [2024-06-20 15:45:43,421 INFO L125 PetriNetUnfolderBase]: For 7305/7309 co-relation queries the response was YES. [2024-06-20 15:45:43,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8368 conditions, 2394 events. 1571/2394 cut-off events. For 7305/7309 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11650 event pairs, 635 based on Foata normal form. 8/2401 useless extension candidates. Maximal degree in co-relation 8345. Up to 2253 conditions per place. [2024-06-20 15:45:43,433 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 54 selfloop transitions, 19 changer transitions 0/78 dead transitions. [2024-06-20 15:45:43,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 541 flow [2024-06-20 15:45:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:45:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:45:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-20 15:45:43,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-20 15:45:43,435 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 299 flow. Second operand 6 states and 122 transitions. [2024-06-20 15:45:43,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 541 flow [2024-06-20 15:45:43,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 511 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 15:45:43,439 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-20 15:45:43,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-20 15:45:43,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-20 15:45:43,440 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-20 15:45:43,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:43,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:43,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:43,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:45:43,441 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)] === [2024-06-20 15:45:43,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:43,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1584246969, now seen corresponding path program 2 times [2024-06-20 15:45:43,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:43,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032531305] [2024-06-20 15:45:43,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:43,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:44,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:44,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032531305] [2024-06-20 15:45:44,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032531305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:44,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:44,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:45:44,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811354682] [2024-06-20 15:45:44,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:44,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:45:44,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:44,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:45:44,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:45:44,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:45:44,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:44,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:44,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:45:44,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:44,595 INFO L124 PetriNetUnfolderBase]: 1559/2367 cut-off events. [2024-06-20 15:45:44,595 INFO L125 PetriNetUnfolderBase]: For 8725/8725 co-relation queries the response was YES. [2024-06-20 15:45:44,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8537 conditions, 2367 events. 1559/2367 cut-off events. For 8725/8725 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11458 event pairs, 649 based on Foata normal form. 2/2365 useless extension candidates. Maximal degree in co-relation 8513. Up to 2237 conditions per place. [2024-06-20 15:45:44,606 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 48 selfloop transitions, 20 changer transitions 0/73 dead transitions. [2024-06-20 15:45:44,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 515 flow [2024-06-20 15:45:44,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:45:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:45:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-20 15:45:44,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-20 15:45:44,608 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 6 states and 118 transitions. [2024-06-20 15:45:44,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 515 flow [2024-06-20 15:45:44,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 486 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:45:44,613 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 360 flow [2024-06-20 15:45:44,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-20 15:45:44,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-20 15:45:44,614 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 360 flow [2024-06-20 15:45:44,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:44,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:44,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:44,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:45:44,614 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:44,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:44,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1889539607, now seen corresponding path program 1 times [2024-06-20 15:45:44,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:44,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656120837] [2024-06-20 15:45:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:44,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:45,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:45,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656120837] [2024-06-20 15:45:45,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656120837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:45,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:45,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:45:45,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310424489] [2024-06-20 15:45:45,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:45,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:45:45,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:45:45,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:45:45,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:45:45,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 360 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-20 15:45:45,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:45,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:45:45,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:45,888 INFO L124 PetriNetUnfolderBase]: 1733/2649 cut-off events. [2024-06-20 15:45:45,889 INFO L125 PetriNetUnfolderBase]: For 11612/11616 co-relation queries the response was YES. [2024-06-20 15:45:45,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9924 conditions, 2649 events. 1733/2649 cut-off events. For 11612/11616 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13070 event pairs, 547 based on Foata normal form. 9/2657 useless extension candidates. Maximal degree in co-relation 9899. Up to 2237 conditions per place. [2024-06-20 15:45:45,904 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 79 selfloop transitions, 39 changer transitions 0/123 dead transitions. [2024-06-20 15:45:45,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 123 transitions, 997 flow [2024-06-20 15:45:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:45,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-20 15:45:45,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-20 15:45:45,906 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 360 flow. Second operand 8 states and 169 transitions. [2024-06-20 15:45:45,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 123 transitions, 997 flow [2024-06-20 15:45:45,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 123 transitions, 871 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:45:45,914 INFO L231 Difference]: Finished difference. Result has 69 places, 82 transitions, 581 flow [2024-06-20 15:45:45,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=581, PETRI_PLACES=69, PETRI_TRANSITIONS=82} [2024-06-20 15:45:45,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-20 15:45:45,915 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 82 transitions, 581 flow [2024-06-20 15:45:45,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-20 15:45:45,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:45,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:45,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:45:45,916 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:45,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:45,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1562649223, now seen corresponding path program 2 times [2024-06-20 15:45:45,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:45,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006922151] [2024-06-20 15:45:45,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:45,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:46,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:46,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006922151] [2024-06-20 15:45:46,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006922151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:46,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:46,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:45:46,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710855809] [2024-06-20 15:45:46,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:46,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:45:46,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:46,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:45:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:45:46,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:45:46,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 581 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-20 15:45:46,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:46,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:45:46,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:47,287 INFO L124 PetriNetUnfolderBase]: 1805/2765 cut-off events. [2024-06-20 15:45:47,287 INFO L125 PetriNetUnfolderBase]: For 15152/15156 co-relation queries the response was YES. [2024-06-20 15:45:47,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11381 conditions, 2765 events. 1805/2765 cut-off events. For 15152/15156 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13773 event pairs, 559 based on Foata normal form. 12/2776 useless extension candidates. Maximal degree in co-relation 11352. Up to 2285 conditions per place. [2024-06-20 15:45:47,301 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 65 selfloop transitions, 48 changer transitions 0/118 dead transitions. [2024-06-20 15:45:47,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 118 transitions, 1003 flow [2024-06-20 15:45:47,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:45:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:45:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-20 15:45:47,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-20 15:45:47,304 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 581 flow. Second operand 7 states and 145 transitions. [2024-06-20 15:45:47,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 118 transitions, 1003 flow [2024-06-20 15:45:47,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 118 transitions, 975 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 15:45:47,316 INFO L231 Difference]: Finished difference. Result has 74 places, 89 transitions, 734 flow [2024-06-20 15:45:47,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=734, PETRI_PLACES=74, PETRI_TRANSITIONS=89} [2024-06-20 15:45:47,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-20 15:45:47,318 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 89 transitions, 734 flow [2024-06-20 15:45:47,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-20 15:45:47,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:47,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:47,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:45:47,318 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)] === [2024-06-20 15:45:47,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:47,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1866777303, now seen corresponding path program 3 times [2024-06-20 15:45:47,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:47,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332415621] [2024-06-20 15:45:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:47,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:47,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:47,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332415621] [2024-06-20 15:45:47,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332415621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:47,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:47,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:45:47,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371121334] [2024-06-20 15:45:47,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:47,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:45:47,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:47,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:45:47,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:45:48,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:45:48,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 89 transitions, 734 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-20 15:45:48,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:48,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:45:48,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:48,656 INFO L124 PetriNetUnfolderBase]: 1841/2818 cut-off events. [2024-06-20 15:45:48,656 INFO L125 PetriNetUnfolderBase]: For 18412/18414 co-relation queries the response was YES. [2024-06-20 15:45:48,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12391 conditions, 2818 events. 1841/2818 cut-off events. For 18412/18414 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 14017 event pairs, 563 based on Foata normal form. 6/2818 useless extension candidates. Maximal degree in co-relation 12360. Up to 2301 conditions per place. [2024-06-20 15:45:48,671 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 62 selfloop transitions, 60 changer transitions 0/127 dead transitions. [2024-06-20 15:45:48,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 127 transitions, 1268 flow [2024-06-20 15:45:48,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:45:48,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:45:48,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-20 15:45:48,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-20 15:45:48,673 INFO L175 Difference]: Start difference. First operand has 74 places, 89 transitions, 734 flow. Second operand 7 states and 145 transitions. [2024-06-20 15:45:48,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 127 transitions, 1268 flow [2024-06-20 15:45:48,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 127 transitions, 1152 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-20 15:45:48,689 INFO L231 Difference]: Finished difference. Result has 77 places, 99 transitions, 882 flow [2024-06-20 15:45:48,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=882, PETRI_PLACES=77, PETRI_TRANSITIONS=99} [2024-06-20 15:45:48,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-20 15:45:48,690 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 99 transitions, 882 flow [2024-06-20 15:45:48,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-20 15:45:48,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:48,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:48,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:45:48,690 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)] === [2024-06-20 15:45:48,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:48,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1572646189, now seen corresponding path program 4 times [2024-06-20 15:45:48,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:48,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753753806] [2024-06-20 15:45:48,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:48,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:49,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:49,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753753806] [2024-06-20 15:45:49,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753753806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:49,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:49,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:45:49,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417447872] [2024-06-20 15:45:49,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:49,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:45:49,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:49,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:45:49,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:45:49,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:45:49,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 99 transitions, 882 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-20 15:45:49,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:49,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:45:49,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:50,040 INFO L124 PetriNetUnfolderBase]: 1825/2793 cut-off events. [2024-06-20 15:45:50,041 INFO L125 PetriNetUnfolderBase]: For 18612/18614 co-relation queries the response was YES. [2024-06-20 15:45:50,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12206 conditions, 2793 events. 1825/2793 cut-off events. For 18612/18614 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13882 event pairs, 572 based on Foata normal form. 6/2793 useless extension candidates. Maximal degree in co-relation 12174. Up to 2294 conditions per place. [2024-06-20 15:45:50,055 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 62 selfloop transitions, 58 changer transitions 0/125 dead transitions. [2024-06-20 15:45:50,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 1242 flow [2024-06-20 15:45:50,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:45:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:45:50,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-20 15:45:50,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-20 15:45:50,058 INFO L175 Difference]: Start difference. First operand has 77 places, 99 transitions, 882 flow. Second operand 7 states and 144 transitions. [2024-06-20 15:45:50,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 1242 flow [2024-06-20 15:45:50,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 125 transitions, 1146 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 15:45:50,073 INFO L231 Difference]: Finished difference. Result has 81 places, 99 transitions, 912 flow [2024-06-20 15:45:50,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=912, PETRI_PLACES=81, PETRI_TRANSITIONS=99} [2024-06-20 15:45:50,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-20 15:45:50,074 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 99 transitions, 912 flow [2024-06-20 15:45:50,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-20 15:45:50,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:50,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:50,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:45:50,075 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)] === [2024-06-20 15:45:50,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:50,075 INFO L85 PathProgramCache]: Analyzing trace with hash 787456522, now seen corresponding path program 1 times [2024-06-20 15:45:50,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:50,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023006008] [2024-06-20 15:45:50,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:50,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:50,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:50,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023006008] [2024-06-20 15:45:50,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023006008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:50,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:50,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:45:50,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094620428] [2024-06-20 15:45:50,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:50,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:45:50,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:50,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:45:50,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:45:50,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-20 15:45:50,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 99 transitions, 912 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:50,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:50,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-20 15:45:50,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:51,133 INFO L124 PetriNetUnfolderBase]: 1510/2459 cut-off events. [2024-06-20 15:45:51,133 INFO L125 PetriNetUnfolderBase]: For 18210/18229 co-relation queries the response was YES. [2024-06-20 15:45:51,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10757 conditions, 2459 events. 1510/2459 cut-off events. For 18210/18229 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 13087 event pairs, 521 based on Foata normal form. 8/2451 useless extension candidates. Maximal degree in co-relation 10723. Up to 2206 conditions per place. [2024-06-20 15:45:51,150 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 89 selfloop transitions, 8 changer transitions 0/110 dead transitions. [2024-06-20 15:45:51,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 110 transitions, 1150 flow [2024-06-20 15:45:51,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:45:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:45:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-20 15:45:51,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-20 15:45:51,152 INFO L175 Difference]: Start difference. First operand has 81 places, 99 transitions, 912 flow. Second operand 5 states and 100 transitions. [2024-06-20 15:45:51,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 110 transitions, 1150 flow [2024-06-20 15:45:51,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 110 transitions, 1007 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:45:51,169 INFO L231 Difference]: Finished difference. Result has 80 places, 102 transitions, 817 flow [2024-06-20 15:45:51,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=817, PETRI_PLACES=80, PETRI_TRANSITIONS=102} [2024-06-20 15:45:51,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-20 15:45:51,170 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 102 transitions, 817 flow [2024-06-20 15:45:51,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:51,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:51,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:51,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:45:51,170 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)] === [2024-06-20 15:45:51,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:51,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2001640229, now seen corresponding path program 1 times [2024-06-20 15:45:51,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:51,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165173053] [2024-06-20 15:45:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:51,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:52,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:52,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165173053] [2024-06-20 15:45:52,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165173053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:52,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:52,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:52,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163041624] [2024-06-20 15:45:52,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:52,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:52,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:52,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:52,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:52,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:45:52,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 102 transitions, 817 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:52,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:52,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:45:52,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:52,878 INFO L124 PetriNetUnfolderBase]: 1866/2883 cut-off events. [2024-06-20 15:45:52,878 INFO L125 PetriNetUnfolderBase]: For 22504/22508 co-relation queries the response was YES. [2024-06-20 15:45:52,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12838 conditions, 2883 events. 1866/2883 cut-off events. For 22504/22508 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14600 event pairs, 565 based on Foata normal form. 8/2890 useless extension candidates. Maximal degree in co-relation 12803. Up to 2328 conditions per place. [2024-06-20 15:45:52,893 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 62 changer transitions 0/142 dead transitions. [2024-06-20 15:45:52,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 142 transitions, 1319 flow [2024-06-20 15:45:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-20 15:45:52,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-20 15:45:52,895 INFO L175 Difference]: Start difference. First operand has 80 places, 102 transitions, 817 flow. Second operand 8 states and 163 transitions. [2024-06-20 15:45:52,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 142 transitions, 1319 flow [2024-06-20 15:45:52,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 142 transitions, 1293 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 15:45:52,910 INFO L231 Difference]: Finished difference. Result has 85 places, 108 transitions, 1003 flow [2024-06-20 15:45:52,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1003, PETRI_PLACES=85, PETRI_TRANSITIONS=108} [2024-06-20 15:45:52,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-20 15:45:52,911 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 108 transitions, 1003 flow [2024-06-20 15:45:52,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:52,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:52,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:52,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:45:52,912 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)] === [2024-06-20 15:45:52,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:52,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2001634649, now seen corresponding path program 2 times [2024-06-20 15:45:52,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:52,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048246140] [2024-06-20 15:45:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:52,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:53,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:53,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048246140] [2024-06-20 15:45:53,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048246140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:53,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:53,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:45:53,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015395129] [2024-06-20 15:45:53,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:53,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:45:53,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:53,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:45:53,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:45:53,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:45:53,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 108 transitions, 1003 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:53,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:53,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:45:53,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:54,278 INFO L124 PetriNetUnfolderBase]: 1898/2954 cut-off events. [2024-06-20 15:45:54,279 INFO L125 PetriNetUnfolderBase]: For 27037/27045 co-relation queries the response was YES. [2024-06-20 15:45:54,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13731 conditions, 2954 events. 1898/2954 cut-off events. For 27037/27045 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 15149 event pairs, 576 based on Foata normal form. 14/2967 useless extension candidates. Maximal degree in co-relation 13695. Up to 2357 conditions per place. [2024-06-20 15:45:54,294 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 72 selfloop transitions, 69 changer transitions 0/146 dead transitions. [2024-06-20 15:45:54,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 146 transitions, 1523 flow [2024-06-20 15:45:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:45:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:45:54,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-20 15:45:54,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068027210884354 [2024-06-20 15:45:54,296 INFO L175 Difference]: Start difference. First operand has 85 places, 108 transitions, 1003 flow. Second operand 7 states and 149 transitions. [2024-06-20 15:45:54,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 146 transitions, 1523 flow [2024-06-20 15:45:54,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 146 transitions, 1359 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 15:45:54,316 INFO L231 Difference]: Finished difference. Result has 86 places, 114 transitions, 1076 flow [2024-06-20 15:45:54,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1076, PETRI_PLACES=86, PETRI_TRANSITIONS=114} [2024-06-20 15:45:54,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-20 15:45:54,317 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 114 transitions, 1076 flow [2024-06-20 15:45:54,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:54,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:54,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:54,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:45:54,318 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)] === [2024-06-20 15:45:54,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:54,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2035520401, now seen corresponding path program 3 times [2024-06-20 15:45:54,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:54,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874449547] [2024-06-20 15:45:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:54,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:55,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:55,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874449547] [2024-06-20 15:45:55,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874449547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:55,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:55,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:55,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887898986] [2024-06-20 15:45:55,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:55,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:55,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:55,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:55,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:55,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:45:55,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 114 transitions, 1076 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:55,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:55,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:45:55,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:55,992 INFO L124 PetriNetUnfolderBase]: 1934/3010 cut-off events. [2024-06-20 15:45:55,992 INFO L125 PetriNetUnfolderBase]: For 29974/29976 co-relation queries the response was YES. [2024-06-20 15:45:55,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14257 conditions, 3010 events. 1934/3010 cut-off events. For 29974/29976 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15516 event pairs, 562 based on Foata normal form. 6/3010 useless extension candidates. Maximal degree in co-relation 14220. Up to 2389 conditions per place. [2024-06-20 15:45:56,008 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 78 changer transitions 0/157 dead transitions. [2024-06-20 15:45:56,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 157 transitions, 1640 flow [2024-06-20 15:45:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:45:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:45:56,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-20 15:45:56,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-20 15:45:56,010 INFO L175 Difference]: Start difference. First operand has 86 places, 114 transitions, 1076 flow. Second operand 9 states and 179 transitions. [2024-06-20 15:45:56,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 157 transitions, 1640 flow [2024-06-20 15:45:56,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 157 transitions, 1458 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 15:45:56,033 INFO L231 Difference]: Finished difference. Result has 90 places, 120 transitions, 1149 flow [2024-06-20 15:45:56,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1149, PETRI_PLACES=90, PETRI_TRANSITIONS=120} [2024-06-20 15:45:56,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-20 15:45:56,033 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 120 transitions, 1149 flow [2024-06-20 15:45:56,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:56,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:56,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:56,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:45:56,034 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:56,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:56,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1396788591, now seen corresponding path program 4 times [2024-06-20 15:45:56,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:56,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919965594] [2024-06-20 15:45:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:56,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:56,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:56,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919965594] [2024-06-20 15:45:56,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919965594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:56,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:56,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:56,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374573477] [2024-06-20 15:45:56,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:56,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:56,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:56,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:56,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:56,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:45:56,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 120 transitions, 1149 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:56,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:56,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:45:56,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:57,547 INFO L124 PetriNetUnfolderBase]: 1918/2968 cut-off events. [2024-06-20 15:45:57,547 INFO L125 PetriNetUnfolderBase]: For 32177/32179 co-relation queries the response was YES. [2024-06-20 15:45:57,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14244 conditions, 2968 events. 1918/2968 cut-off events. For 32177/32179 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15136 event pairs, 588 based on Foata normal form. 6/2968 useless extension candidates. Maximal degree in co-relation 14207. Up to 2376 conditions per place. [2024-06-20 15:45:57,562 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 68 selfloop transitions, 76 changer transitions 0/149 dead transitions. [2024-06-20 15:45:57,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 149 transitions, 1529 flow [2024-06-20 15:45:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-20 15:45:57,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-20 15:45:57,564 INFO L175 Difference]: Start difference. First operand has 90 places, 120 transitions, 1149 flow. Second operand 8 states and 160 transitions. [2024-06-20 15:45:57,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 149 transitions, 1529 flow [2024-06-20 15:45:57,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 149 transitions, 1306 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 15:45:57,591 INFO L231 Difference]: Finished difference. Result has 91 places, 120 transitions, 1089 flow [2024-06-20 15:45:57,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1089, PETRI_PLACES=91, PETRI_TRANSITIONS=120} [2024-06-20 15:45:57,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-20 15:45:57,592 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 120 transitions, 1089 flow [2024-06-20 15:45:57,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:57,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:57,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:57,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:45:57,592 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:57,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:57,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1404417288, now seen corresponding path program 1 times [2024-06-20 15:45:57,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:57,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127505548] [2024-06-20 15:45:57,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:57,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:58,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:58,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127505548] [2024-06-20 15:45:58,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127505548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:58,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:58,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:58,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300313829] [2024-06-20 15:45:58,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:58,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:58,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:58,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:58,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:58,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:45:58,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 120 transitions, 1089 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-20 15:45:58,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:58,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:45:58,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:59,208 INFO L124 PetriNetUnfolderBase]: 1703/2754 cut-off events. [2024-06-20 15:45:59,208 INFO L125 PetriNetUnfolderBase]: For 28975/28977 co-relation queries the response was YES. [2024-06-20 15:45:59,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12909 conditions, 2754 events. 1703/2754 cut-off events. For 28975/28977 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14599 event pairs, 550 based on Foata normal form. 4/2757 useless extension candidates. Maximal degree in co-relation 12871. Up to 2485 conditions per place. [2024-06-20 15:45:59,223 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 127 selfloop transitions, 16 changer transitions 0/149 dead transitions. [2024-06-20 15:45:59,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 149 transitions, 1492 flow [2024-06-20 15:45:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 15:45:59,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 15:45:59,224 INFO L175 Difference]: Start difference. First operand has 91 places, 120 transitions, 1089 flow. Second operand 8 states and 154 transitions. [2024-06-20 15:45:59,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 149 transitions, 1492 flow [2024-06-20 15:45:59,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 149 transitions, 1284 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:45:59,247 INFO L231 Difference]: Finished difference. Result has 92 places, 125 transitions, 975 flow [2024-06-20 15:45:59,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=975, PETRI_PLACES=92, PETRI_TRANSITIONS=125} [2024-06-20 15:45:59,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-20 15:45:59,247 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 125 transitions, 975 flow [2024-06-20 15:45:59,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-20 15:45:59,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:59,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:59,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:45:59,248 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)] === [2024-06-20 15:45:59,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1340775507, now seen corresponding path program 1 times [2024-06-20 15:45:59,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:59,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923268409] [2024-06-20 15:45:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:59,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:00,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:00,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923268409] [2024-06-20 15:46:00,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923268409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:00,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:00,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:46:00,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646675813] [2024-06-20 15:46:00,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:00,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:46:00,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:00,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:46:00,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:46:00,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-20 15:46:00,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 125 transitions, 975 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:00,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:00,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-20 15:46:00,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:00,675 INFO L124 PetriNetUnfolderBase]: 1590/2616 cut-off events. [2024-06-20 15:46:00,675 INFO L125 PetriNetUnfolderBase]: For 30522/30541 co-relation queries the response was YES. [2024-06-20 15:46:00,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12378 conditions, 2616 events. 1590/2616 cut-off events. For 30522/30541 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14165 event pairs, 527 based on Foata normal form. 8/2606 useless extension candidates. Maximal degree in co-relation 12338. Up to 2321 conditions per place. [2024-06-20 15:46:00,689 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 113 selfloop transitions, 11 changer transitions 0/137 dead transitions. [2024-06-20 15:46:00,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 137 transitions, 1275 flow [2024-06-20 15:46:00,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:46:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:46:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-20 15:46:00,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-20 15:46:00,690 INFO L175 Difference]: Start difference. First operand has 92 places, 125 transitions, 975 flow. Second operand 6 states and 116 transitions. [2024-06-20 15:46:00,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 137 transitions, 1275 flow [2024-06-20 15:46:00,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 137 transitions, 1228 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 15:46:00,710 INFO L231 Difference]: Finished difference. Result has 93 places, 128 transitions, 988 flow [2024-06-20 15:46:00,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=988, PETRI_PLACES=93, PETRI_TRANSITIONS=128} [2024-06-20 15:46:00,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-20 15:46:00,711 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 128 transitions, 988 flow [2024-06-20 15:46:00,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:00,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:00,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:00,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:46:00,711 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:00,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2130486966, now seen corresponding path program 1 times [2024-06-20 15:46:00,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:00,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126287013] [2024-06-20 15:46:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:00,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:01,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:01,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126287013] [2024-06-20 15:46:01,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126287013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:01,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:01,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:01,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783356479] [2024-06-20 15:46:01,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:01,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:01,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:01,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:01,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:01,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:01,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 128 transitions, 988 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:01,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:01,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:01,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:01,995 INFO L124 PetriNetUnfolderBase]: 1921/2998 cut-off events. [2024-06-20 15:46:01,995 INFO L125 PetriNetUnfolderBase]: For 39215/39219 co-relation queries the response was YES. [2024-06-20 15:46:02,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14741 conditions, 2998 events. 1921/2998 cut-off events. For 39215/39219 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15445 event pairs, 430 based on Foata normal form. 6/3003 useless extension candidates. Maximal degree in co-relation 14700. Up to 2597 conditions per place. [2024-06-20 15:46:02,011 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 121 selfloop transitions, 32 changer transitions 0/158 dead transitions. [2024-06-20 15:46:02,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 158 transitions, 1484 flow [2024-06-20 15:46:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-20 15:46:02,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-20 15:46:02,013 INFO L175 Difference]: Start difference. First operand has 93 places, 128 transitions, 988 flow. Second operand 7 states and 139 transitions. [2024-06-20 15:46:02,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 158 transitions, 1484 flow [2024-06-20 15:46:02,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 158 transitions, 1446 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:02,041 INFO L231 Difference]: Finished difference. Result has 96 places, 132 transitions, 1069 flow [2024-06-20 15:46:02,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1069, PETRI_PLACES=96, PETRI_TRANSITIONS=132} [2024-06-20 15:46:02,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-20 15:46:02,041 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 132 transitions, 1069 flow [2024-06-20 15:46:02,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:02,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:02,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:02,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:46:02,042 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:02,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:02,042 INFO L85 PathProgramCache]: Analyzing trace with hash 941571762, now seen corresponding path program 2 times [2024-06-20 15:46:02,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:02,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350129477] [2024-06-20 15:46:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:02,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:02,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:02,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350129477] [2024-06-20 15:46:02,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350129477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:02,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:02,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:02,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507877113] [2024-06-20 15:46:02,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:02,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:02,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:02,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:02,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:02,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:02,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 132 transitions, 1069 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:02,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:02,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:02,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:03,415 INFO L124 PetriNetUnfolderBase]: 1913/2981 cut-off events. [2024-06-20 15:46:03,415 INFO L125 PetriNetUnfolderBase]: For 42888/42892 co-relation queries the response was YES. [2024-06-20 15:46:03,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15082 conditions, 2981 events. 1913/2981 cut-off events. For 42888/42892 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15309 event pairs, 568 based on Foata normal form. 6/2986 useless extension candidates. Maximal degree in co-relation 15040. Up to 2673 conditions per place. [2024-06-20 15:46:03,431 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 118 selfloop transitions, 33 changer transitions 0/156 dead transitions. [2024-06-20 15:46:03,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 156 transitions, 1449 flow [2024-06-20 15:46:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:03,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 15:46:03,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-20 15:46:03,433 INFO L175 Difference]: Start difference. First operand has 96 places, 132 transitions, 1069 flow. Second operand 7 states and 137 transitions. [2024-06-20 15:46:03,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 156 transitions, 1449 flow [2024-06-20 15:46:03,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 156 transitions, 1389 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 15:46:03,463 INFO L231 Difference]: Finished difference. Result has 100 places, 132 transitions, 1084 flow [2024-06-20 15:46:03,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1084, PETRI_PLACES=100, PETRI_TRANSITIONS=132} [2024-06-20 15:46:03,464 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-20 15:46:03,464 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 132 transitions, 1084 flow [2024-06-20 15:46:03,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:03,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:03,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:03,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:46:03,465 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:03,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:03,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1016038761, now seen corresponding path program 1 times [2024-06-20 15:46:03,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:03,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566021347] [2024-06-20 15:46:03,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:03,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:04,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:04,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566021347] [2024-06-20 15:46:04,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566021347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:04,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:04,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:46:04,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916296692] [2024-06-20 15:46:04,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:04,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:46:04,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:04,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:46:04,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:46:04,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:46:04,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 132 transitions, 1084 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:04,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:04,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:46:04,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:04,589 INFO L124 PetriNetUnfolderBase]: 1792/2848 cut-off events. [2024-06-20 15:46:04,590 INFO L125 PetriNetUnfolderBase]: For 46679/46699 co-relation queries the response was YES. [2024-06-20 15:46:04,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14730 conditions, 2848 events. 1792/2848 cut-off events. For 46679/46699 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15056 event pairs, 570 based on Foata normal form. 11/2850 useless extension candidates. Maximal degree in co-relation 14686. Up to 2596 conditions per place. [2024-06-20 15:46:04,657 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 124 selfloop transitions, 13 changer transitions 0/151 dead transitions. [2024-06-20 15:46:04,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 151 transitions, 1438 flow [2024-06-20 15:46:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:46:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:46:04,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-20 15:46:04,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-20 15:46:04,659 INFO L175 Difference]: Start difference. First operand has 100 places, 132 transitions, 1084 flow. Second operand 6 states and 117 transitions. [2024-06-20 15:46:04,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 151 transitions, 1438 flow [2024-06-20 15:46:04,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 151 transitions, 1363 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:04,687 INFO L231 Difference]: Finished difference. Result has 100 places, 135 transitions, 1074 flow [2024-06-20 15:46:04,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1074, PETRI_PLACES=100, PETRI_TRANSITIONS=135} [2024-06-20 15:46:04,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-20 15:46:04,688 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 135 transitions, 1074 flow [2024-06-20 15:46:04,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:04,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:04,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:04,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:46:04,688 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)] === [2024-06-20 15:46:04,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash 831506281, now seen corresponding path program 2 times [2024-06-20 15:46:04,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:04,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908108053] [2024-06-20 15:46:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:04,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:05,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:05,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908108053] [2024-06-20 15:46:05,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908108053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:05,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:05,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:46:05,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802941900] [2024-06-20 15:46:05,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:05,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:46:05,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:05,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:46:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:46:05,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:46:05,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 135 transitions, 1074 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:05,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:05,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:46:05,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:05,848 INFO L124 PetriNetUnfolderBase]: 1789/2853 cut-off events. [2024-06-20 15:46:05,848 INFO L125 PetriNetUnfolderBase]: For 50314/50343 co-relation queries the response was YES. [2024-06-20 15:46:05,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15045 conditions, 2853 events. 1789/2853 cut-off events. For 50314/50343 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15132 event pairs, 563 based on Foata normal form. 16/2861 useless extension candidates. Maximal degree in co-relation 15000. Up to 2586 conditions per place. [2024-06-20 15:46:05,873 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 117 selfloop transitions, 18 changer transitions 0/149 dead transitions. [2024-06-20 15:46:05,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 149 transitions, 1414 flow [2024-06-20 15:46:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:46:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:46:05,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-20 15:46:05,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-20 15:46:05,875 INFO L175 Difference]: Start difference. First operand has 100 places, 135 transitions, 1074 flow. Second operand 6 states and 113 transitions. [2024-06-20 15:46:05,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 149 transitions, 1414 flow [2024-06-20 15:46:05,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 149 transitions, 1373 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:05,912 INFO L231 Difference]: Finished difference. Result has 102 places, 138 transitions, 1113 flow [2024-06-20 15:46:05,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1113, PETRI_PLACES=102, PETRI_TRANSITIONS=138} [2024-06-20 15:46:05,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-20 15:46:05,913 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 138 transitions, 1113 flow [2024-06-20 15:46:05,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:05,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:05,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:05,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:46:05,913 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)] === [2024-06-20 15:46:05,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:05,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1385387683, now seen corresponding path program 1 times [2024-06-20 15:46:05,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:05,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484727523] [2024-06-20 15:46:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:05,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:06,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:06,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484727523] [2024-06-20 15:46:06,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484727523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:06,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:06,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:46:06,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482208123] [2024-06-20 15:46:06,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:06,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:46:06,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:06,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:46:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:46:06,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:46:06,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 138 transitions, 1113 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:06,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:06,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:46:06,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:07,097 INFO L124 PetriNetUnfolderBase]: 1716/2780 cut-off events. [2024-06-20 15:46:07,098 INFO L125 PetriNetUnfolderBase]: For 46132/46134 co-relation queries the response was YES. [2024-06-20 15:46:07,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14647 conditions, 2780 events. 1716/2780 cut-off events. For 46132/46134 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14762 event pairs, 535 based on Foata normal form. 1/2780 useless extension candidates. Maximal degree in co-relation 14601. Up to 2539 conditions per place. [2024-06-20 15:46:07,114 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 136 selfloop transitions, 11 changer transitions 0/153 dead transitions. [2024-06-20 15:46:07,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 153 transitions, 1473 flow [2024-06-20 15:46:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:46:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:46:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-20 15:46:07,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 15:46:07,115 INFO L175 Difference]: Start difference. First operand has 102 places, 138 transitions, 1113 flow. Second operand 6 states and 114 transitions. [2024-06-20 15:46:07,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 153 transitions, 1473 flow [2024-06-20 15:46:07,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 153 transitions, 1415 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:07,146 INFO L231 Difference]: Finished difference. Result has 104 places, 141 transitions, 1119 flow [2024-06-20 15:46:07,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1119, PETRI_PLACES=104, PETRI_TRANSITIONS=141} [2024-06-20 15:46:07,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-20 15:46:07,147 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 141 transitions, 1119 flow [2024-06-20 15:46:07,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:07,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:07,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:07,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:46:07,148 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:07,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:07,148 INFO L85 PathProgramCache]: Analyzing trace with hash 831512233, now seen corresponding path program 2 times [2024-06-20 15:46:07,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:07,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873719106] [2024-06-20 15:46:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:07,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:07,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:07,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873719106] [2024-06-20 15:46:07,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873719106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:07,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:07,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:46:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078051008] [2024-06-20 15:46:07,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:07,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:46:07,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:46:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:46:07,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:46:07,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 141 transitions, 1119 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:07,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:07,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:46:07,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:08,211 INFO L124 PetriNetUnfolderBase]: 1713/2777 cut-off events. [2024-06-20 15:46:08,211 INFO L125 PetriNetUnfolderBase]: For 49102/49106 co-relation queries the response was YES. [2024-06-20 15:46:08,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14967 conditions, 2777 events. 1713/2777 cut-off events. For 49102/49106 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14811 event pairs, 539 based on Foata normal form. 3/2779 useless extension candidates. Maximal degree in co-relation 14920. Up to 2529 conditions per place. [2024-06-20 15:46:08,228 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 131 selfloop transitions, 16 changer transitions 0/153 dead transitions. [2024-06-20 15:46:08,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 153 transitions, 1475 flow [2024-06-20 15:46:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:46:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:46:08,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-20 15:46:08,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-20 15:46:08,229 INFO L175 Difference]: Start difference. First operand has 104 places, 141 transitions, 1119 flow. Second operand 6 states and 113 transitions. [2024-06-20 15:46:08,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 153 transitions, 1475 flow [2024-06-20 15:46:08,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 153 transitions, 1433 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:08,268 INFO L231 Difference]: Finished difference. Result has 106 places, 144 transitions, 1157 flow [2024-06-20 15:46:08,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1157, PETRI_PLACES=106, PETRI_TRANSITIONS=144} [2024-06-20 15:46:08,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-20 15:46:08,269 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 144 transitions, 1157 flow [2024-06-20 15:46:08,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:08,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:08,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:08,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:46:08,269 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)] === [2024-06-20 15:46:08,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:08,269 INFO L85 PathProgramCache]: Analyzing trace with hash -793014720, now seen corresponding path program 1 times [2024-06-20 15:46:08,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:08,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612249676] [2024-06-20 15:46:08,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:08,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:09,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:09,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612249676] [2024-06-20 15:46:09,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612249676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:09,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:09,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:09,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943430090] [2024-06-20 15:46:09,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:09,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:09,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:09,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:09,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:09,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:09,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 144 transitions, 1157 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:09,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:09,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:09,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:09,739 INFO L124 PetriNetUnfolderBase]: 2061/3248 cut-off events. [2024-06-20 15:46:09,739 INFO L125 PetriNetUnfolderBase]: For 72653/72657 co-relation queries the response was YES. [2024-06-20 15:46:09,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18349 conditions, 3248 events. 2061/3248 cut-off events. For 72653/72657 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17150 event pairs, 444 based on Foata normal form. 16/3263 useless extension candidates. Maximal degree in co-relation 18301. Up to 2037 conditions per place. [2024-06-20 15:46:09,760 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 107 selfloop transitions, 73 changer transitions 0/185 dead transitions. [2024-06-20 15:46:09,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 185 transitions, 1769 flow [2024-06-20 15:46:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:09,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-20 15:46:09,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-20 15:46:09,761 INFO L175 Difference]: Start difference. First operand has 106 places, 144 transitions, 1157 flow. Second operand 8 states and 167 transitions. [2024-06-20 15:46:09,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 185 transitions, 1769 flow [2024-06-20 15:46:09,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 185 transitions, 1711 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:09,805 INFO L231 Difference]: Finished difference. Result has 110 places, 146 transitions, 1289 flow [2024-06-20 15:46:09,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1289, PETRI_PLACES=110, PETRI_TRANSITIONS=146} [2024-06-20 15:46:09,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-20 15:46:09,805 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 146 transitions, 1289 flow [2024-06-20 15:46:09,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:09,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:09,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:09,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:46:09,806 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:09,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:09,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1493860950, now seen corresponding path program 2 times [2024-06-20 15:46:09,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:09,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817500873] [2024-06-20 15:46:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:09,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:10,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:10,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817500873] [2024-06-20 15:46:10,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817500873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:10,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:10,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:10,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527158024] [2024-06-20 15:46:10,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:10,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:10,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:10,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:10,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:10,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:10,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 146 transitions, 1289 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:10,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:10,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:10,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:11,446 INFO L124 PetriNetUnfolderBase]: 2153/3401 cut-off events. [2024-06-20 15:46:11,447 INFO L125 PetriNetUnfolderBase]: For 81163/81167 co-relation queries the response was YES. [2024-06-20 15:46:11,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19631 conditions, 3401 events. 2153/3401 cut-off events. For 81163/81167 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18306 event pairs, 596 based on Foata normal form. 24/3424 useless extension candidates. Maximal degree in co-relation 19582. Up to 2599 conditions per place. [2024-06-20 15:46:11,474 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 99 selfloop transitions, 78 changer transitions 0/182 dead transitions. [2024-06-20 15:46:11,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 182 transitions, 1791 flow [2024-06-20 15:46:11,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-20 15:46:11,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-20 15:46:11,475 INFO L175 Difference]: Start difference. First operand has 110 places, 146 transitions, 1289 flow. Second operand 8 states and 164 transitions. [2024-06-20 15:46:11,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 182 transitions, 1791 flow [2024-06-20 15:46:11,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 182 transitions, 1705 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:11,525 INFO L231 Difference]: Finished difference. Result has 114 places, 148 transitions, 1407 flow [2024-06-20 15:46:11,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1407, PETRI_PLACES=114, PETRI_TRANSITIONS=148} [2024-06-20 15:46:11,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-20 15:46:11,525 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 148 transitions, 1407 flow [2024-06-20 15:46:11,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:11,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:11,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:11,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:46:11,526 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:11,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:11,526 INFO L85 PathProgramCache]: Analyzing trace with hash 59688058, now seen corresponding path program 3 times [2024-06-20 15:46:11,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:11,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253617012] [2024-06-20 15:46:11,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:11,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:12,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:12,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253617012] [2024-06-20 15:46:12,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253617012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:12,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:12,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:12,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200749514] [2024-06-20 15:46:12,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:12,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:12,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:12,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:12,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:12,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:12,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 148 transitions, 1407 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:12,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:12,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:12,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:13,142 INFO L124 PetriNetUnfolderBase]: 2211/3509 cut-off events. [2024-06-20 15:46:13,142 INFO L125 PetriNetUnfolderBase]: For 86927/86931 co-relation queries the response was YES. [2024-06-20 15:46:13,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20810 conditions, 3509 events. 2211/3509 cut-off events. For 86927/86931 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 19132 event pairs, 608 based on Foata normal form. 16/3524 useless extension candidates. Maximal degree in co-relation 20759. Up to 2579 conditions per place. [2024-06-20 15:46:13,165 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 102 selfloop transitions, 79 changer transitions 0/186 dead transitions. [2024-06-20 15:46:13,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 186 transitions, 1915 flow [2024-06-20 15:46:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-20 15:46:13,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-20 15:46:13,166 INFO L175 Difference]: Start difference. First operand has 114 places, 148 transitions, 1407 flow. Second operand 8 states and 167 transitions. [2024-06-20 15:46:13,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 186 transitions, 1915 flow [2024-06-20 15:46:13,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 186 transitions, 1747 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:13,223 INFO L231 Difference]: Finished difference. Result has 116 places, 149 transitions, 1427 flow [2024-06-20 15:46:13,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1427, PETRI_PLACES=116, PETRI_TRANSITIONS=149} [2024-06-20 15:46:13,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-20 15:46:13,224 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 149 transitions, 1427 flow [2024-06-20 15:46:13,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:13,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:13,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:13,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:46:13,228 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)] === [2024-06-20 15:46:13,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash 185554675, now seen corresponding path program 1 times [2024-06-20 15:46:13,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:13,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340037205] [2024-06-20 15:46:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:13,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:13,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:13,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340037205] [2024-06-20 15:46:13,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340037205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:13,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:13,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:13,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994695452] [2024-06-20 15:46:13,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:13,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:13,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:13,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:13,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:13,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:13,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 149 transitions, 1427 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:13,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:13,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:13,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:14,576 INFO L124 PetriNetUnfolderBase]: 2221/3534 cut-off events. [2024-06-20 15:46:14,576 INFO L125 PetriNetUnfolderBase]: For 88566/88574 co-relation queries the response was YES. [2024-06-20 15:46:14,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21057 conditions, 3534 events. 2221/3534 cut-off events. For 88566/88574 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 19339 event pairs, 644 based on Foata normal form. 10/3543 useless extension candidates. Maximal degree in co-relation 21005. Up to 3199 conditions per place. [2024-06-20 15:46:14,603 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 136 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2024-06-20 15:46:14,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 176 transitions, 1895 flow [2024-06-20 15:46:14,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 15:46:14,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-20 15:46:14,604 INFO L175 Difference]: Start difference. First operand has 116 places, 149 transitions, 1427 flow. Second operand 7 states and 137 transitions. [2024-06-20 15:46:14,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 176 transitions, 1895 flow [2024-06-20 15:46:14,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 176 transitions, 1725 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:14,667 INFO L231 Difference]: Finished difference. Result has 117 places, 153 transitions, 1391 flow [2024-06-20 15:46:14,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1391, PETRI_PLACES=117, PETRI_TRANSITIONS=153} [2024-06-20 15:46:14,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-20 15:46:14,667 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 153 transitions, 1391 flow [2024-06-20 15:46:14,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:14,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:14,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:14,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:46:14,668 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:14,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:14,669 INFO L85 PathProgramCache]: Analyzing trace with hash -574561158, now seen corresponding path program 4 times [2024-06-20 15:46:14,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:14,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185686222] [2024-06-20 15:46:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:14,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:15,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:15,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185686222] [2024-06-20 15:46:15,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185686222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:15,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:15,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:15,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394525506] [2024-06-20 15:46:15,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:15,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:15,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:15,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:15,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:15,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:15,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 153 transitions, 1391 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:15,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:15,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:15,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:16,194 INFO L124 PetriNetUnfolderBase]: 2340/3751 cut-off events. [2024-06-20 15:46:16,194 INFO L125 PetriNetUnfolderBase]: For 102633/102641 co-relation queries the response was YES. [2024-06-20 15:46:16,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22471 conditions, 3751 events. 2340/3751 cut-off events. For 102633/102641 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 20969 event pairs, 486 based on Foata normal form. 22/3772 useless extension candidates. Maximal degree in co-relation 22418. Up to 2672 conditions per place. [2024-06-20 15:46:16,220 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 111 selfloop transitions, 81 changer transitions 0/197 dead transitions. [2024-06-20 15:46:16,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 197 transitions, 2063 flow [2024-06-20 15:46:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:16,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:16,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-20 15:46:16,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-20 15:46:16,222 INFO L175 Difference]: Start difference. First operand has 117 places, 153 transitions, 1391 flow. Second operand 8 states and 172 transitions. [2024-06-20 15:46:16,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 197 transitions, 2063 flow [2024-06-20 15:46:16,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 197 transitions, 1959 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:46:16,281 INFO L231 Difference]: Finished difference. Result has 120 places, 155 transitions, 1505 flow [2024-06-20 15:46:16,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1505, PETRI_PLACES=120, PETRI_TRANSITIONS=155} [2024-06-20 15:46:16,282 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-20 15:46:16,282 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 155 transitions, 1505 flow [2024-06-20 15:46:16,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:16,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:16,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:16,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:46:16,283 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:16,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:16,283 INFO L85 PathProgramCache]: Analyzing trace with hash 426608832, now seen corresponding path program 5 times [2024-06-20 15:46:16,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:16,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166638363] [2024-06-20 15:46:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:16,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:17,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:17,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166638363] [2024-06-20 15:46:17,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166638363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:17,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:17,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:46:17,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158843736] [2024-06-20 15:46:17,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:17,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:46:17,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:17,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:46:17,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:46:17,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:17,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 155 transitions, 1505 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 15:46:17,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:17,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:17,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:18,185 INFO L124 PetriNetUnfolderBase]: 2415/3867 cut-off events. [2024-06-20 15:46:18,185 INFO L125 PetriNetUnfolderBase]: For 113101/113105 co-relation queries the response was YES. [2024-06-20 15:46:18,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23602 conditions, 3867 events. 2415/3867 cut-off events. For 113101/113105 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21862 event pairs, 662 based on Foata normal form. 20/3886 useless extension candidates. Maximal degree in co-relation 23548. Up to 3072 conditions per place. [2024-06-20 15:46:18,210 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 114 selfloop transitions, 77 changer transitions 0/196 dead transitions. [2024-06-20 15:46:18,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 196 transitions, 2053 flow [2024-06-20 15:46:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:46:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:46:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 15:46:18,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-20 15:46:18,212 INFO L175 Difference]: Start difference. First operand has 120 places, 155 transitions, 1505 flow. Second operand 9 states and 181 transitions. [2024-06-20 15:46:18,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 196 transitions, 2053 flow [2024-06-20 15:46:18,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 196 transitions, 1946 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:18,285 INFO L231 Difference]: Finished difference. Result has 125 places, 156 transitions, 1589 flow [2024-06-20 15:46:18,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1589, PETRI_PLACES=125, PETRI_TRANSITIONS=156} [2024-06-20 15:46:18,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-20 15:46:18,285 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 156 transitions, 1589 flow [2024-06-20 15:46:18,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 15:46:18,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:18,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:18,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:46:18,286 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:18,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:18,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1510290616, now seen corresponding path program 6 times [2024-06-20 15:46:18,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:18,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663949901] [2024-06-20 15:46:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:18,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:19,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:19,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663949901] [2024-06-20 15:46:19,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663949901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:19,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:19,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:19,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026751893] [2024-06-20 15:46:19,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:19,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:19,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:19,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:19,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:19,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:19,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 156 transitions, 1589 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:19,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:19,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:19,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:19,963 INFO L124 PetriNetUnfolderBase]: 2490/4001 cut-off events. [2024-06-20 15:46:19,964 INFO L125 PetriNetUnfolderBase]: For 121285/121293 co-relation queries the response was YES. [2024-06-20 15:46:19,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24690 conditions, 4001 events. 2490/4001 cut-off events. For 121285/121293 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 22900 event pairs, 659 based on Foata normal form. 26/4026 useless extension candidates. Maximal degree in co-relation 24634. Up to 3197 conditions per place. [2024-06-20 15:46:19,992 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 78 changer transitions 0/195 dead transitions. [2024-06-20 15:46:19,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 195 transitions, 2131 flow [2024-06-20 15:46:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-20 15:46:19,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-20 15:46:19,994 INFO L175 Difference]: Start difference. First operand has 125 places, 156 transitions, 1589 flow. Second operand 8 states and 167 transitions. [2024-06-20 15:46:19,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 195 transitions, 2131 flow [2024-06-20 15:46:20,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 195 transitions, 1968 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 15:46:20,082 INFO L231 Difference]: Finished difference. Result has 126 places, 157 transitions, 1621 flow [2024-06-20 15:46:20,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1621, PETRI_PLACES=126, PETRI_TRANSITIONS=157} [2024-06-20 15:46:20,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-20 15:46:20,082 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 157 transitions, 1621 flow [2024-06-20 15:46:20,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:20,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:20,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:20,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:46:20,083 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)] === [2024-06-20 15:46:20,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:20,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1432431603, now seen corresponding path program 2 times [2024-06-20 15:46:20,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:20,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324391567] [2024-06-20 15:46:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:20,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:20,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:20,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324391567] [2024-06-20 15:46:20,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324391567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:20,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:20,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:20,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436460280] [2024-06-20 15:46:20,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:20,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:20,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:20,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:20,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:20,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:20,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 157 transitions, 1621 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:20,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:20,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:20,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:21,415 INFO L124 PetriNetUnfolderBase]: 2518/4045 cut-off events. [2024-06-20 15:46:21,415 INFO L125 PetriNetUnfolderBase]: For 122217/122221 co-relation queries the response was YES. [2024-06-20 15:46:21,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25211 conditions, 4045 events. 2518/4045 cut-off events. For 122217/122221 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23305 event pairs, 742 based on Foata normal form. 4/4048 useless extension candidates. Maximal degree in co-relation 25154. Up to 3651 conditions per place. [2024-06-20 15:46:21,489 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 139 selfloop transitions, 38 changer transitions 0/182 dead transitions. [2024-06-20 15:46:21,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 182 transitions, 2195 flow [2024-06-20 15:46:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 15:46:21,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 15:46:21,490 INFO L175 Difference]: Start difference. First operand has 126 places, 157 transitions, 1621 flow. Second operand 7 states and 133 transitions. [2024-06-20 15:46:21,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 182 transitions, 2195 flow [2024-06-20 15:46:21,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 182 transitions, 2028 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:21,572 INFO L231 Difference]: Finished difference. Result has 128 places, 165 transitions, 1673 flow [2024-06-20 15:46:21,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1673, PETRI_PLACES=128, PETRI_TRANSITIONS=165} [2024-06-20 15:46:21,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-20 15:46:21,572 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 165 transitions, 1673 flow [2024-06-20 15:46:21,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:21,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:21,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:21,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:46:21,573 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)] === [2024-06-20 15:46:21,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:21,573 INFO L85 PathProgramCache]: Analyzing trace with hash -376892538, now seen corresponding path program 1 times [2024-06-20 15:46:21,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:21,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583444080] [2024-06-20 15:46:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:21,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:22,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:22,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583444080] [2024-06-20 15:46:22,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583444080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:22,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:22,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:22,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800878230] [2024-06-20 15:46:22,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:22,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:22,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:22,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:22,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:22,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:46:22,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 165 transitions, 1673 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:22,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:22,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:46:22,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:23,042 INFO L124 PetriNetUnfolderBase]: 2399/3879 cut-off events. [2024-06-20 15:46:23,042 INFO L125 PetriNetUnfolderBase]: For 127371/127391 co-relation queries the response was YES. [2024-06-20 15:46:23,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24733 conditions, 3879 events. 2399/3879 cut-off events. For 127371/127391 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22547 event pairs, 735 based on Foata normal form. 11/3857 useless extension candidates. Maximal degree in co-relation 24674. Up to 3555 conditions per place. [2024-06-20 15:46:23,071 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 150 selfloop transitions, 16 changer transitions 0/185 dead transitions. [2024-06-20 15:46:23,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 185 transitions, 2101 flow [2024-06-20 15:46:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 15:46:23,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-20 15:46:23,072 INFO L175 Difference]: Start difference. First operand has 128 places, 165 transitions, 1673 flow. Second operand 7 states and 132 transitions. [2024-06-20 15:46:23,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 185 transitions, 2101 flow [2024-06-20 15:46:23,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 185 transitions, 2015 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-20 15:46:23,163 INFO L231 Difference]: Finished difference. Result has 132 places, 168 transitions, 1671 flow [2024-06-20 15:46:23,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1671, PETRI_PLACES=132, PETRI_TRANSITIONS=168} [2024-06-20 15:46:23,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-20 15:46:23,163 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 168 transitions, 1671 flow [2024-06-20 15:46:23,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:23,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:23,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:23,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:46:23,164 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:23,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:23,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2010890066, now seen corresponding path program 7 times [2024-06-20 15:46:23,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:23,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164242212] [2024-06-20 15:46:23,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:23,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:24,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:24,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164242212] [2024-06-20 15:46:24,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164242212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:24,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:24,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:46:24,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666354277] [2024-06-20 15:46:24,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:24,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:46:24,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:24,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:46:24,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:46:24,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:24,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 168 transitions, 1671 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 15:46:24,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:24,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:24,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:25,080 INFO L124 PetriNetUnfolderBase]: 2598/4148 cut-off events. [2024-06-20 15:46:25,080 INFO L125 PetriNetUnfolderBase]: For 143334/143336 co-relation queries the response was YES. [2024-06-20 15:46:25,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26688 conditions, 4148 events. 2598/4148 cut-off events. For 143334/143336 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23803 event pairs, 681 based on Foata normal form. 20/4162 useless extension candidates. Maximal degree in co-relation 26627. Up to 3374 conditions per place. [2024-06-20 15:46:25,109 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 123 selfloop transitions, 79 changer transitions 0/207 dead transitions. [2024-06-20 15:46:25,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 207 transitions, 2243 flow [2024-06-20 15:46:25,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:46:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:46:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 15:46:25,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-20 15:46:25,110 INFO L175 Difference]: Start difference. First operand has 132 places, 168 transitions, 1671 flow. Second operand 9 states and 180 transitions. [2024-06-20 15:46:25,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 207 transitions, 2243 flow [2024-06-20 15:46:25,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 207 transitions, 2181 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:46:25,202 INFO L231 Difference]: Finished difference. Result has 136 places, 169 transitions, 1808 flow [2024-06-20 15:46:25,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1808, PETRI_PLACES=136, PETRI_TRANSITIONS=169} [2024-06-20 15:46:25,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-20 15:46:25,203 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 169 transitions, 1808 flow [2024-06-20 15:46:25,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 15:46:25,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:25,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:25,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:46:25,203 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:25,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:25,203 INFO L85 PathProgramCache]: Analyzing trace with hash -470908928, now seen corresponding path program 8 times [2024-06-20 15:46:25,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:25,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952402215] [2024-06-20 15:46:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:25,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:26,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:26,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952402215] [2024-06-20 15:46:26,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952402215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:26,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:26,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:46:26,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255504069] [2024-06-20 15:46:26,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:26,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:46:26,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:26,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:46:26,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:46:26,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:26,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 169 transitions, 1808 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 15:46:26,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:26,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:26,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:27,166 INFO L124 PetriNetUnfolderBase]: 2562/4109 cut-off events. [2024-06-20 15:46:27,166 INFO L125 PetriNetUnfolderBase]: For 143441/143443 co-relation queries the response was YES. [2024-06-20 15:46:27,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26491 conditions, 4109 events. 2562/4109 cut-off events. For 143441/143443 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 23611 event pairs, 637 based on Foata normal form. 20/4123 useless extension candidates. Maximal degree in co-relation 26429. Up to 3318 conditions per place. [2024-06-20 15:46:27,196 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 127 selfloop transitions, 81 changer transitions 0/213 dead transitions. [2024-06-20 15:46:27,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 213 transitions, 2384 flow [2024-06-20 15:46:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:46:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:46:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-20 15:46:27,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-20 15:46:27,198 INFO L175 Difference]: Start difference. First operand has 136 places, 169 transitions, 1808 flow. Second operand 10 states and 197 transitions. [2024-06-20 15:46:27,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 213 transitions, 2384 flow [2024-06-20 15:46:27,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 213 transitions, 2203 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 15:46:27,329 INFO L231 Difference]: Finished difference. Result has 139 places, 169 transitions, 1798 flow [2024-06-20 15:46:27,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1627, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1798, PETRI_PLACES=139, PETRI_TRANSITIONS=169} [2024-06-20 15:46:27,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-20 15:46:27,330 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 169 transitions, 1798 flow [2024-06-20 15:46:27,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 15:46:27,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:27,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:27,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:46:27,330 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:27,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:27,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2010674585, now seen corresponding path program 1 times [2024-06-20 15:46:27,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:27,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989034429] [2024-06-20 15:46:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:27,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:28,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:28,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989034429] [2024-06-20 15:46:28,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989034429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:28,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:28,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:46:28,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797189202] [2024-06-20 15:46:28,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:28,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:46:28,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:28,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:46:28,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:46:28,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:28,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 169 transitions, 1798 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 15:46:28,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:28,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:28,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:29,222 INFO L124 PetriNetUnfolderBase]: 2579/4111 cut-off events. [2024-06-20 15:46:29,223 INFO L125 PetriNetUnfolderBase]: For 141443/141445 co-relation queries the response was YES. [2024-06-20 15:46:29,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26654 conditions, 4111 events. 2579/4111 cut-off events. For 141443/141445 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23529 event pairs, 669 based on Foata normal form. 4/4109 useless extension candidates. Maximal degree in co-relation 26591. Up to 3453 conditions per place. [2024-06-20 15:46:29,252 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 118 selfloop transitions, 84 changer transitions 0/207 dead transitions. [2024-06-20 15:46:29,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 207 transitions, 2390 flow [2024-06-20 15:46:29,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:46:29,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:46:29,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 15:46:29,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-20 15:46:29,253 INFO L175 Difference]: Start difference. First operand has 139 places, 169 transitions, 1798 flow. Second operand 9 states and 175 transitions. [2024-06-20 15:46:29,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 207 transitions, 2390 flow [2024-06-20 15:46:29,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 207 transitions, 2192 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-20 15:46:29,383 INFO L231 Difference]: Finished difference. Result has 140 places, 175 transitions, 1867 flow [2024-06-20 15:46:29,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1867, PETRI_PLACES=140, PETRI_TRANSITIONS=175} [2024-06-20 15:46:29,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-20 15:46:29,383 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 175 transitions, 1867 flow [2024-06-20 15:46:29,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 15:46:29,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:29,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:29,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:46:29,384 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:29,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash 759293769, now seen corresponding path program 2 times [2024-06-20 15:46:29,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:29,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940739444] [2024-06-20 15:46:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:29,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:30,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:30,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940739444] [2024-06-20 15:46:30,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940739444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:30,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:30,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:46:30,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035933145] [2024-06-20 15:46:30,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:30,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:46:30,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:30,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:46:30,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:46:30,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:30,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 175 transitions, 1867 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 15:46:30,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:30,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:30,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:31,354 INFO L124 PetriNetUnfolderBase]: 2614/4166 cut-off events. [2024-06-20 15:46:31,354 INFO L125 PetriNetUnfolderBase]: For 149657/149659 co-relation queries the response was YES. [2024-06-20 15:46:31,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27434 conditions, 4166 events. 2614/4166 cut-off events. For 149657/149659 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23913 event pairs, 654 based on Foata normal form. 4/4164 useless extension candidates. Maximal degree in co-relation 27369. Up to 3492 conditions per place. [2024-06-20 15:46:31,389 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 119 selfloop transitions, 91 changer transitions 0/215 dead transitions. [2024-06-20 15:46:31,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 215 transitions, 2509 flow [2024-06-20 15:46:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:46:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:46:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 15:46:31,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-20 15:46:31,390 INFO L175 Difference]: Start difference. First operand has 140 places, 175 transitions, 1867 flow. Second operand 9 states and 175 transitions. [2024-06-20 15:46:31,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 215 transitions, 2509 flow [2024-06-20 15:46:31,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 215 transitions, 2297 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:31,519 INFO L231 Difference]: Finished difference. Result has 144 places, 183 transitions, 1969 flow [2024-06-20 15:46:31,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1969, PETRI_PLACES=144, PETRI_TRANSITIONS=183} [2024-06-20 15:46:31,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-20 15:46:31,520 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 183 transitions, 1969 flow [2024-06-20 15:46:31,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 15:46:31,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:31,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:31,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:46:31,520 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:31,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:31,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1338338141, now seen corresponding path program 3 times [2024-06-20 15:46:31,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:31,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140667477] [2024-06-20 15:46:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:31,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:32,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:32,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140667477] [2024-06-20 15:46:32,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140667477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:32,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:32,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:46:32,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394748028] [2024-06-20 15:46:32,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:32,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:46:32,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:32,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:46:32,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:46:32,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:32,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 183 transitions, 1969 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 15:46:32,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:32,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:32,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:33,379 INFO L124 PetriNetUnfolderBase]: 2606/4158 cut-off events. [2024-06-20 15:46:33,379 INFO L125 PetriNetUnfolderBase]: For 155907/155909 co-relation queries the response was YES. [2024-06-20 15:46:33,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27780 conditions, 4158 events. 2606/4158 cut-off events. For 155907/155909 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23862 event pairs, 655 based on Foata normal form. 4/4156 useless extension candidates. Maximal degree in co-relation 27713. Up to 3480 conditions per place. [2024-06-20 15:46:33,414 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 120 selfloop transitions, 104 changer transitions 0/229 dead transitions. [2024-06-20 15:46:33,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 229 transitions, 2724 flow [2024-06-20 15:46:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:46:33,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:46:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 15:46:33,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-20 15:46:33,416 INFO L175 Difference]: Start difference. First operand has 144 places, 183 transitions, 1969 flow. Second operand 9 states and 175 transitions. [2024-06-20 15:46:33,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 229 transitions, 2724 flow [2024-06-20 15:46:33,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 229 transitions, 2480 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:33,650 INFO L231 Difference]: Finished difference. Result has 148 places, 197 transitions, 2165 flow [2024-06-20 15:46:33,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2165, PETRI_PLACES=148, PETRI_TRANSITIONS=197} [2024-06-20 15:46:33,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-20 15:46:33,651 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 197 transitions, 2165 flow [2024-06-20 15:46:33,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 15:46:33,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:33,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:33,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:46:33,651 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:33,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:33,652 INFO L85 PathProgramCache]: Analyzing trace with hash -58271005, now seen corresponding path program 4 times [2024-06-20 15:46:33,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:33,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178018622] [2024-06-20 15:46:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:33,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:34,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:34,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178018622] [2024-06-20 15:46:34,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178018622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:34,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:34,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:46:34,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573726741] [2024-06-20 15:46:34,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:34,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:46:34,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:34,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:46:34,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:46:34,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:34,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 197 transitions, 2165 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 15:46:34,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:34,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:34,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:35,522 INFO L124 PetriNetUnfolderBase]: 2639/4223 cut-off events. [2024-06-20 15:46:35,522 INFO L125 PetriNetUnfolderBase]: For 161928/161930 co-relation queries the response was YES. [2024-06-20 15:46:35,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28377 conditions, 4223 events. 2639/4223 cut-off events. For 161928/161930 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24445 event pairs, 560 based on Foata normal form. 4/4221 useless extension candidates. Maximal degree in co-relation 28308. Up to 3322 conditions per place. [2024-06-20 15:46:35,556 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 118 selfloop transitions, 113 changer transitions 0/236 dead transitions. [2024-06-20 15:46:35,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 236 transitions, 2815 flow [2024-06-20 15:46:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:46:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:46:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-20 15:46:35,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-20 15:46:35,558 INFO L175 Difference]: Start difference. First operand has 148 places, 197 transitions, 2165 flow. Second operand 9 states and 179 transitions. [2024-06-20 15:46:35,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 236 transitions, 2815 flow [2024-06-20 15:46:35,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 236 transitions, 2614 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:35,698 INFO L231 Difference]: Finished difference. Result has 154 places, 200 transitions, 2286 flow [2024-06-20 15:46:35,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1968, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2286, PETRI_PLACES=154, PETRI_TRANSITIONS=200} [2024-06-20 15:46:35,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-20 15:46:35,699 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 200 transitions, 2286 flow [2024-06-20 15:46:35,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 15:46:35,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:35,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:35,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:46:35,700 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)] === [2024-06-20 15:46:35,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash 4959308, now seen corresponding path program 2 times [2024-06-20 15:46:35,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:35,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108291876] [2024-06-20 15:46:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:35,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:36,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:36,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108291876] [2024-06-20 15:46:36,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108291876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:36,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:36,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:36,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751892186] [2024-06-20 15:46:36,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:36,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:36,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:36,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:36,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:36,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:46:36,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 200 transitions, 2286 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:36,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:36,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:46:36,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:37,363 INFO L124 PetriNetUnfolderBase]: 2520/4114 cut-off events. [2024-06-20 15:46:37,363 INFO L125 PetriNetUnfolderBase]: For 167889/167926 co-relation queries the response was YES. [2024-06-20 15:46:37,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27643 conditions, 4114 events. 2520/4114 cut-off events. For 167889/167926 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 24438 event pairs, 641 based on Foata normal form. 24/4106 useless extension candidates. Maximal degree in co-relation 27572. Up to 3742 conditions per place. [2024-06-20 15:46:37,400 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 174 selfloop transitions, 28 changer transitions 0/221 dead transitions. [2024-06-20 15:46:37,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 221 transitions, 2926 flow [2024-06-20 15:46:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:37,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 15:46:37,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-20 15:46:37,401 INFO L175 Difference]: Start difference. First operand has 154 places, 200 transitions, 2286 flow. Second operand 7 states and 130 transitions. [2024-06-20 15:46:37,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 221 transitions, 2926 flow [2024-06-20 15:46:37,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 221 transitions, 2686 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:37,557 INFO L231 Difference]: Finished difference. Result has 156 places, 208 transitions, 2245 flow [2024-06-20 15:46:37,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2046, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2245, PETRI_PLACES=156, PETRI_TRANSITIONS=208} [2024-06-20 15:46:37,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-20 15:46:37,557 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 208 transitions, 2245 flow [2024-06-20 15:46:37,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:37,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:37,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:37,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:46:37,558 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)] === [2024-06-20 15:46:37,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:37,558 INFO L85 PathProgramCache]: Analyzing trace with hash 4513435, now seen corresponding path program 3 times [2024-06-20 15:46:37,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:37,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700653993] [2024-06-20 15:46:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:37,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:38,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:38,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700653993] [2024-06-20 15:46:38,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700653993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:38,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:38,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:38,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681094345] [2024-06-20 15:46:38,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:38,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:38,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:38,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:38,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:38,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:38,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 208 transitions, 2245 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:38,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:38,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:38,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:38,925 INFO L124 PetriNetUnfolderBase]: 2648/4284 cut-off events. [2024-06-20 15:46:38,925 INFO L125 PetriNetUnfolderBase]: For 175543/175547 co-relation queries the response was YES. [2024-06-20 15:46:38,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28405 conditions, 4284 events. 2648/4284 cut-off events. For 175543/175547 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25063 event pairs, 685 based on Foata normal form. 4/4282 useless extension candidates. Maximal degree in co-relation 28332. Up to 3836 conditions per place. [2024-06-20 15:46:38,962 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 51 changer transitions 0/229 dead transitions. [2024-06-20 15:46:38,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 229 transitions, 3029 flow [2024-06-20 15:46:38,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 15:46:38,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-20 15:46:38,963 INFO L175 Difference]: Start difference. First operand has 156 places, 208 transitions, 2245 flow. Second operand 7 states and 131 transitions. [2024-06-20 15:46:38,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 229 transitions, 3029 flow [2024-06-20 15:46:39,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 229 transitions, 2956 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 15:46:39,136 INFO L231 Difference]: Finished difference. Result has 161 places, 216 transitions, 2440 flow [2024-06-20 15:46:39,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2440, PETRI_PLACES=161, PETRI_TRANSITIONS=216} [2024-06-20 15:46:39,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-20 15:46:39,136 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 216 transitions, 2440 flow [2024-06-20 15:46:39,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:39,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:39,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:39,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:46:39,137 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)] === [2024-06-20 15:46:39,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash 6892422, now seen corresponding path program 3 times [2024-06-20 15:46:39,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:39,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889581753] [2024-06-20 15:46:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:39,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:39,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:39,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889581753] [2024-06-20 15:46:39,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889581753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:39,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:39,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:39,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804465357] [2024-06-20 15:46:39,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:39,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:39,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:39,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:39,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:40,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:46:40,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 216 transitions, 2440 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:40,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:40,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:46:40,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:40,698 INFO L124 PetriNetUnfolderBase]: 2523/4129 cut-off events. [2024-06-20 15:46:40,699 INFO L125 PetriNetUnfolderBase]: For 184837/184874 co-relation queries the response was YES. [2024-06-20 15:46:40,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28288 conditions, 4129 events. 2523/4129 cut-off events. For 184837/184874 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24629 event pairs, 650 based on Foata normal form. 24/4121 useless extension candidates. Maximal degree in co-relation 28212. Up to 3751 conditions per place. [2024-06-20 15:46:40,735 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 187 selfloop transitions, 21 changer transitions 0/229 dead transitions. [2024-06-20 15:46:40,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 229 transitions, 2903 flow [2024-06-20 15:46:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 15:46:40,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 15:46:40,736 INFO L175 Difference]: Start difference. First operand has 161 places, 216 transitions, 2440 flow. Second operand 7 states and 128 transitions. [2024-06-20 15:46:40,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 229 transitions, 2903 flow [2024-06-20 15:46:40,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 229 transitions, 2707 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:40,921 INFO L231 Difference]: Finished difference. Result has 164 places, 217 transitions, 2301 flow [2024-06-20 15:46:40,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2244, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2301, PETRI_PLACES=164, PETRI_TRANSITIONS=217} [2024-06-20 15:46:40,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-20 15:46:40,922 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 217 transitions, 2301 flow [2024-06-20 15:46:40,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:40,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:40,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:40,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:46:40,923 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)] === [2024-06-20 15:46:40,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:40,923 INFO L85 PathProgramCache]: Analyzing trace with hash -529794745, now seen corresponding path program 1 times [2024-06-20 15:46:40,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:40,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937478327] [2024-06-20 15:46:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:40,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:41,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:41,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937478327] [2024-06-20 15:46:41,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937478327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:41,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:41,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:41,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307982387] [2024-06-20 15:46:41,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:41,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:41,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:41,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:41,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:41,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:46:41,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 217 transitions, 2301 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:41,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:41,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:46:41,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:42,337 INFO L124 PetriNetUnfolderBase]: 2551/4196 cut-off events. [2024-06-20 15:46:42,338 INFO L125 PetriNetUnfolderBase]: For 192320/192322 co-relation queries the response was YES. [2024-06-20 15:46:42,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28360 conditions, 4196 events. 2551/4196 cut-off events. For 192320/192322 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 24994 event pairs, 682 based on Foata normal form. 2/4197 useless extension candidates. Maximal degree in co-relation 28283. Up to 3840 conditions per place. [2024-06-20 15:46:42,375 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 213 selfloop transitions, 14 changer transitions 0/237 dead transitions. [2024-06-20 15:46:42,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 237 transitions, 2849 flow [2024-06-20 15:46:42,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 15:46:42,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 15:46:42,376 INFO L175 Difference]: Start difference. First operand has 164 places, 217 transitions, 2301 flow. Second operand 7 states and 133 transitions. [2024-06-20 15:46:42,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 237 transitions, 2849 flow [2024-06-20 15:46:42,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 237 transitions, 2803 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:46:42,614 INFO L231 Difference]: Finished difference. Result has 166 places, 220 transitions, 2335 flow [2024-06-20 15:46:42,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2335, PETRI_PLACES=166, PETRI_TRANSITIONS=220} [2024-06-20 15:46:42,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-20 15:46:42,615 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 220 transitions, 2335 flow [2024-06-20 15:46:42,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:42,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:42,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:42,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:46:42,615 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)] === [2024-06-20 15:46:42,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash -529645015, now seen corresponding path program 2 times [2024-06-20 15:46:42,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:42,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405121805] [2024-06-20 15:46:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:42,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:43,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:43,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405121805] [2024-06-20 15:46:43,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405121805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:43,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:43,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:43,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146161567] [2024-06-20 15:46:43,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:43,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:43,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:43,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:43,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:43,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:46:43,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 220 transitions, 2335 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:43,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:43,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:46:43,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:44,053 INFO L124 PetriNetUnfolderBase]: 2561/4212 cut-off events. [2024-06-20 15:46:44,053 INFO L125 PetriNetUnfolderBase]: For 200749/200751 co-relation queries the response was YES. [2024-06-20 15:46:44,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28978 conditions, 4212 events. 2561/4212 cut-off events. For 200749/200751 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25131 event pairs, 682 based on Foata normal form. 2/4213 useless extension candidates. Maximal degree in co-relation 28900. Up to 3845 conditions per place. [2024-06-20 15:46:44,088 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 209 selfloop transitions, 19 changer transitions 0/238 dead transitions. [2024-06-20 15:46:44,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 238 transitions, 2887 flow [2024-06-20 15:46:44,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 15:46:44,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 15:46:44,091 INFO L175 Difference]: Start difference. First operand has 166 places, 220 transitions, 2335 flow. Second operand 7 states and 133 transitions. [2024-06-20 15:46:44,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 238 transitions, 2887 flow [2024-06-20 15:46:44,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 238 transitions, 2829 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:46:44,305 INFO L231 Difference]: Finished difference. Result has 168 places, 223 transitions, 2373 flow [2024-06-20 15:46:44,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2277, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2373, PETRI_PLACES=168, PETRI_TRANSITIONS=223} [2024-06-20 15:46:44,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-20 15:46:44,306 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 223 transitions, 2373 flow [2024-06-20 15:46:44,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:44,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:44,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:44,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:46:44,306 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)] === [2024-06-20 15:46:44,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:44,307 INFO L85 PathProgramCache]: Analyzing trace with hash -199576506, now seen corresponding path program 1 times [2024-06-20 15:46:44,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:44,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823691377] [2024-06-20 15:46:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:44,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:45,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:45,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823691377] [2024-06-20 15:46:45,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823691377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:45,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:45,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:45,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560488774] [2024-06-20 15:46:45,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:45,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:45,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:45,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:45,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:46:45,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 223 transitions, 2373 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:45,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:45,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:46:45,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:46,094 INFO L124 PetriNetUnfolderBase]: 2566/4221 cut-off events. [2024-06-20 15:46:46,095 INFO L125 PetriNetUnfolderBase]: For 209587/209589 co-relation queries the response was YES. [2024-06-20 15:46:46,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29509 conditions, 4221 events. 2566/4221 cut-off events. For 209587/209589 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25189 event pairs, 681 based on Foata normal form. 2/4222 useless extension candidates. Maximal degree in co-relation 29430. Up to 3870 conditions per place. [2024-06-20 15:46:46,140 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 215 selfloop transitions, 14 changer transitions 0/239 dead transitions. [2024-06-20 15:46:46,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 239 transitions, 2911 flow [2024-06-20 15:46:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:46,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 15:46:46,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-20 15:46:46,141 INFO L175 Difference]: Start difference. First operand has 168 places, 223 transitions, 2373 flow. Second operand 7 states and 129 transitions. [2024-06-20 15:46:46,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 239 transitions, 2911 flow [2024-06-20 15:46:46,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 239 transitions, 2837 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:46:46,386 INFO L231 Difference]: Finished difference. Result has 170 places, 226 transitions, 2381 flow [2024-06-20 15:46:46,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2381, PETRI_PLACES=170, PETRI_TRANSITIONS=226} [2024-06-20 15:46:46,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-20 15:46:46,386 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 226 transitions, 2381 flow [2024-06-20 15:46:46,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:46,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:46,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:46,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:46:46,386 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)] === [2024-06-20 15:46:46,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash 7076717, now seen corresponding path program 3 times [2024-06-20 15:46:46,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:46,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586712987] [2024-06-20 15:46:46,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:46,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:47,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:47,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586712987] [2024-06-20 15:46:47,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586712987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:47,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:47,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:47,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79168868] [2024-06-20 15:46:47,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:47,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:47,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:47,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:47,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:47,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:46:47,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 226 transitions, 2381 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:47,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:47,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:46:47,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:47,837 INFO L124 PetriNetUnfolderBase]: 2568/4227 cut-off events. [2024-06-20 15:46:47,837 INFO L125 PetriNetUnfolderBase]: For 216417/216421 co-relation queries the response was YES. [2024-06-20 15:46:47,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29844 conditions, 4227 events. 2568/4227 cut-off events. For 216417/216421 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25272 event pairs, 689 based on Foata normal form. 2/4228 useless extension candidates. Maximal degree in co-relation 29764. Up to 3843 conditions per place. [2024-06-20 15:46:47,874 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 205 selfloop transitions, 26 changer transitions 0/241 dead transitions. [2024-06-20 15:46:47,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 241 transitions, 2937 flow [2024-06-20 15:46:47,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:47,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 15:46:47,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-20 15:46:47,875 INFO L175 Difference]: Start difference. First operand has 170 places, 226 transitions, 2381 flow. Second operand 7 states and 132 transitions. [2024-06-20 15:46:47,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 241 transitions, 2937 flow [2024-06-20 15:46:48,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 241 transitions, 2877 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 15:46:48,069 INFO L231 Difference]: Finished difference. Result has 172 places, 229 transitions, 2439 flow [2024-06-20 15:46:48,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2439, PETRI_PLACES=172, PETRI_TRANSITIONS=229} [2024-06-20 15:46:48,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-20 15:46:48,070 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 229 transitions, 2439 flow [2024-06-20 15:46:48,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:48,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:48,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:48,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:46:48,070 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)] === [2024-06-20 15:46:48,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:48,071 INFO L85 PathProgramCache]: Analyzing trace with hash 7076934, now seen corresponding path program 2 times [2024-06-20 15:46:48,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:48,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286283769] [2024-06-20 15:46:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:48,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:48,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:48,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286283769] [2024-06-20 15:46:48,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286283769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:48,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:48,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:48,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399802399] [2024-06-20 15:46:48,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:48,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:48,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:48,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:48,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:49,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:46:49,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 229 transitions, 2439 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:49,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:49,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:46:49,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:49,735 INFO L124 PetriNetUnfolderBase]: 2573/4236 cut-off events. [2024-06-20 15:46:49,735 INFO L125 PetriNetUnfolderBase]: For 225738/225742 co-relation queries the response was YES. [2024-06-20 15:46:49,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30429 conditions, 4236 events. 2573/4236 cut-off events. For 225738/225742 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25323 event pairs, 685 based on Foata normal form. 4/4239 useless extension candidates. Maximal degree in co-relation 30348. Up to 3874 conditions per place. [2024-06-20 15:46:49,773 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 213 selfloop transitions, 19 changer transitions 0/242 dead transitions. [2024-06-20 15:46:49,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 242 transitions, 2981 flow [2024-06-20 15:46:49,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:49,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 15:46:49,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 15:46:49,774 INFO L175 Difference]: Start difference. First operand has 172 places, 229 transitions, 2439 flow. Second operand 7 states and 128 transitions. [2024-06-20 15:46:49,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 242 transitions, 2981 flow [2024-06-20 15:46:49,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 242 transitions, 2885 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 15:46:49,960 INFO L231 Difference]: Finished difference. Result has 174 places, 232 transitions, 2443 flow [2024-06-20 15:46:49,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=167, 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=7, PETRI_FLOW=2443, PETRI_PLACES=174, PETRI_TRANSITIONS=232} [2024-06-20 15:46:49,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-20 15:46:49,961 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 232 transitions, 2443 flow [2024-06-20 15:46:49,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:49,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:49,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:49,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:46:49,961 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)] === [2024-06-20 15:46:49,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:49,961 INFO L85 PathProgramCache]: Analyzing trace with hash 7343844, now seen corresponding path program 3 times [2024-06-20 15:46:49,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:49,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422456455] [2024-06-20 15:46:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:49,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:50,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:50,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422456455] [2024-06-20 15:46:50,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422456455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:50,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:50,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:50,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358834203] [2024-06-20 15:46:50,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:50,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:50,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:50,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:50,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:50,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:46:50,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 232 transitions, 2443 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:50,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:50,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:46:50,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:51,604 INFO L124 PetriNetUnfolderBase]: 2574/4238 cut-off events. [2024-06-20 15:46:51,604 INFO L125 PetriNetUnfolderBase]: For 234467/234471 co-relation queries the response was YES. [2024-06-20 15:46:51,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30676 conditions, 4238 events. 2574/4238 cut-off events. For 234467/234471 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25422 event pairs, 680 based on Foata normal form. 5/4242 useless extension candidates. Maximal degree in co-relation 30594. Up to 3850 conditions per place. [2024-06-20 15:46:51,644 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 211 selfloop transitions, 30 changer transitions 0/251 dead transitions. [2024-06-20 15:46:51,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 251 transitions, 3185 flow [2024-06-20 15:46:51,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 15:46:51,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-20 15:46:51,645 INFO L175 Difference]: Start difference. First operand has 174 places, 232 transitions, 2443 flow. Second operand 7 states and 132 transitions. [2024-06-20 15:46:51,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 251 transitions, 3185 flow [2024-06-20 15:46:51,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 251 transitions, 3107 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 15:46:51,948 INFO L231 Difference]: Finished difference. Result has 177 places, 239 transitions, 2584 flow [2024-06-20 15:46:51,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2584, PETRI_PLACES=177, PETRI_TRANSITIONS=239} [2024-06-20 15:46:51,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-20 15:46:51,949 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 239 transitions, 2584 flow [2024-06-20 15:46:51,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:51,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:51,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:51,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:46:51,950 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)] === [2024-06-20 15:46:51,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:51,950 INFO L85 PathProgramCache]: Analyzing trace with hash 4975180, now seen corresponding path program 1 times [2024-06-20 15:46:51,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:51,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340485655] [2024-06-20 15:46:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:51,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:53,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:53,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340485655] [2024-06-20 15:46:53,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340485655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:53,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:53,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:53,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595552836] [2024-06-20 15:46:53,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:53,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:53,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:53,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:53,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:46:53,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 239 transitions, 2584 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:53,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:53,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:46:53,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:53,998 INFO L124 PetriNetUnfolderBase]: 2575/4185 cut-off events. [2024-06-20 15:46:53,998 INFO L125 PetriNetUnfolderBase]: For 243527/243556 co-relation queries the response was YES. [2024-06-20 15:46:54,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30901 conditions, 4185 events. 2575/4185 cut-off events. For 243527/243556 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24950 event pairs, 675 based on Foata normal form. 18/4161 useless extension candidates. Maximal degree in co-relation 30817. Up to 3817 conditions per place. [2024-06-20 15:46:54,036 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 210 selfloop transitions, 17 changer transitions 0/252 dead transitions. [2024-06-20 15:46:54,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 252 transitions, 3104 flow [2024-06-20 15:46:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 15:46:54,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 15:46:54,037 INFO L175 Difference]: Start difference. First operand has 177 places, 239 transitions, 2584 flow. Second operand 8 states and 141 transitions. [2024-06-20 15:46:54,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 252 transitions, 3104 flow [2024-06-20 15:46:54,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 252 transitions, 3034 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:54,290 INFO L231 Difference]: Finished difference. Result has 181 places, 241 transitions, 2594 flow [2024-06-20 15:46:54,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2594, PETRI_PLACES=181, PETRI_TRANSITIONS=241} [2024-06-20 15:46:54,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-20 15:46:54,290 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 241 transitions, 2594 flow [2024-06-20 15:46:54,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:54,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:54,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:54,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:46:54,291 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)] === [2024-06-20 15:46:54,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:54,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1445531230, now seen corresponding path program 1 times [2024-06-20 15:46:54,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:54,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133393507] [2024-06-20 15:46:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:54,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:55,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:55,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133393507] [2024-06-20 15:46:55,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133393507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:55,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:55,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:55,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877095592] [2024-06-20 15:46:55,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:55,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:55,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:55,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:55,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:55,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:55,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 241 transitions, 2594 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:55,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:55,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:55,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:56,009 INFO L124 PetriNetUnfolderBase]: 2693/4361 cut-off events. [2024-06-20 15:46:56,009 INFO L125 PetriNetUnfolderBase]: For 249372/249380 co-relation queries the response was YES. [2024-06-20 15:46:56,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31897 conditions, 4361 events. 2693/4361 cut-off events. For 249372/249380 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25671 event pairs, 650 based on Foata normal form. 10/4370 useless extension candidates. Maximal degree in co-relation 31812. Up to 3963 conditions per place. [2024-06-20 15:46:56,053 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 225 selfloop transitions, 39 changer transitions 0/269 dead transitions. [2024-06-20 15:46:56,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 269 transitions, 3270 flow [2024-06-20 15:46:56,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:56,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 15:46:56,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 15:46:56,054 INFO L175 Difference]: Start difference. First operand has 181 places, 241 transitions, 2594 flow. Second operand 8 states and 152 transitions. [2024-06-20 15:46:56,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 269 transitions, 3270 flow [2024-06-20 15:46:56,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 269 transitions, 3160 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 15:46:56,281 INFO L231 Difference]: Finished difference. Result has 182 places, 245 transitions, 2645 flow [2024-06-20 15:46:56,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2484, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2645, PETRI_PLACES=182, PETRI_TRANSITIONS=245} [2024-06-20 15:46:56,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-20 15:46:56,281 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 245 transitions, 2645 flow [2024-06-20 15:46:56,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:56,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:56,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:56,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:46:56,282 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)] === [2024-06-20 15:46:56,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:56,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2103599702, now seen corresponding path program 1 times [2024-06-20 15:46:56,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:56,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170025944] [2024-06-20 15:46:56,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:56,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:56,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:56,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170025944] [2024-06-20 15:46:56,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170025944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:56,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:56,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:56,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200851684] [2024-06-20 15:46:56,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:56,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:56,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:56,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:56,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:57,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:57,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 245 transitions, 2645 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:57,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:57,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:57,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:57,835 INFO L124 PetriNetUnfolderBase]: 2703/4367 cut-off events. [2024-06-20 15:46:57,835 INFO L125 PetriNetUnfolderBase]: For 258751/258755 co-relation queries the response was YES. [2024-06-20 15:46:57,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32679 conditions, 4367 events. 2703/4367 cut-off events. For 258751/258755 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25666 event pairs, 657 based on Foata normal form. 4/4370 useless extension candidates. Maximal degree in co-relation 32594. Up to 3979 conditions per place. [2024-06-20 15:46:57,880 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 229 selfloop transitions, 35 changer transitions 0/269 dead transitions. [2024-06-20 15:46:57,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 269 transitions, 3292 flow [2024-06-20 15:46:57,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:57,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-20 15:46:57,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-20 15:46:57,881 INFO L175 Difference]: Start difference. First operand has 182 places, 245 transitions, 2645 flow. Second operand 7 states and 134 transitions. [2024-06-20 15:46:57,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 269 transitions, 3292 flow [2024-06-20 15:46:58,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 269 transitions, 3159 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:58,221 INFO L231 Difference]: Finished difference. Result has 183 places, 249 transitions, 2652 flow [2024-06-20 15:46:58,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2652, PETRI_PLACES=183, PETRI_TRANSITIONS=249} [2024-06-20 15:46:58,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-20 15:46:58,222 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 249 transitions, 2652 flow [2024-06-20 15:46:58,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:58,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:58,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:58,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:46:58,223 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)] === [2024-06-20 15:46:58,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:58,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1201225800, now seen corresponding path program 2 times [2024-06-20 15:46:58,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:58,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491585447] [2024-06-20 15:46:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:58,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:58,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:58,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491585447] [2024-06-20 15:46:58,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491585447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:58,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:58,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:46:58,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025909571] [2024-06-20 15:46:58,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:58,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:46:58,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:58,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:46:58,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:46:58,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:46:58,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 249 transitions, 2652 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:58,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:58,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:46:58,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:59,695 INFO L124 PetriNetUnfolderBase]: 2705/4374 cut-off events. [2024-06-20 15:46:59,695 INFO L125 PetriNetUnfolderBase]: For 266474/266478 co-relation queries the response was YES. [2024-06-20 15:46:59,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32788 conditions, 4374 events. 2705/4374 cut-off events. For 266474/266478 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25714 event pairs, 658 based on Foata normal form. 4/4377 useless extension candidates. Maximal degree in co-relation 32702. Up to 3942 conditions per place. [2024-06-20 15:46:59,737 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 220 selfloop transitions, 44 changer transitions 0/269 dead transitions. [2024-06-20 15:46:59,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 269 transitions, 3386 flow [2024-06-20 15:46:59,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:46:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:46:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 15:46:59,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 15:46:59,738 INFO L175 Difference]: Start difference. First operand has 183 places, 249 transitions, 2652 flow. Second operand 7 states and 133 transitions. [2024-06-20 15:46:59,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 269 transitions, 3386 flow [2024-06-20 15:47:00,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 269 transitions, 3291 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 15:47:00,033 INFO L231 Difference]: Finished difference. Result has 185 places, 252 transitions, 2708 flow [2024-06-20 15:47:00,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2557, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2708, PETRI_PLACES=185, PETRI_TRANSITIONS=252} [2024-06-20 15:47:00,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-20 15:47:00,034 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 252 transitions, 2708 flow [2024-06-20 15:47:00,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:00,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:00,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:00,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:47:00,034 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:00,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:00,035 INFO L85 PathProgramCache]: Analyzing trace with hash 346652959, now seen corresponding path program 1 times [2024-06-20 15:47:00,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:00,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114722423] [2024-06-20 15:47:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:00,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:01,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:01,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114722423] [2024-06-20 15:47:01,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114722423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:01,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:01,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:47:01,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939620029] [2024-06-20 15:47:01,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:01,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:47:01,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:01,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:47:01,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:47:01,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:47:01,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 252 transitions, 2708 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-20 15:47:01,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:01,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:47:01,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:02,406 INFO L124 PetriNetUnfolderBase]: 2787/4517 cut-off events. [2024-06-20 15:47:02,406 INFO L125 PetriNetUnfolderBase]: For 286116/286120 co-relation queries the response was YES. [2024-06-20 15:47:02,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33633 conditions, 4517 events. 2787/4517 cut-off events. For 286116/286120 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26836 event pairs, 658 based on Foata normal form. 12/4528 useless extension candidates. Maximal degree in co-relation 33546. Up to 3491 conditions per place. [2024-06-20 15:47:02,450 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 206 selfloop transitions, 102 changer transitions 0/313 dead transitions. [2024-06-20 15:47:02,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 313 transitions, 3621 flow [2024-06-20 15:47:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:47:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:47:02,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-06-20 15:47:02,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-20 15:47:02,452 INFO L175 Difference]: Start difference. First operand has 185 places, 252 transitions, 2708 flow. Second operand 12 states and 232 transitions. [2024-06-20 15:47:02,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 313 transitions, 3621 flow [2024-06-20 15:47:02,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 313 transitions, 3525 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 15:47:02,715 INFO L231 Difference]: Finished difference. Result has 195 places, 259 transitions, 2941 flow [2024-06-20 15:47:02,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2941, PETRI_PLACES=195, PETRI_TRANSITIONS=259} [2024-06-20 15:47:02,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-20 15:47:02,715 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 259 transitions, 2941 flow [2024-06-20 15:47:02,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-20 15:47:02,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:02,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:02,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:47:02,716 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)] === [2024-06-20 15:47:02,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1201234294, now seen corresponding path program 2 times [2024-06-20 15:47:02,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:02,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069515681] [2024-06-20 15:47:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:02,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:03,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:03,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069515681] [2024-06-20 15:47:03,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069515681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:03,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:03,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:03,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671653781] [2024-06-20 15:47:03,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:03,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:03,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:03,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:03,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:03,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:47:03,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 259 transitions, 2941 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:03,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:03,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:47:03,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:04,652 INFO L124 PetriNetUnfolderBase]: 2823/4591 cut-off events. [2024-06-20 15:47:04,652 INFO L125 PetriNetUnfolderBase]: For 294254/294258 co-relation queries the response was YES. [2024-06-20 15:47:04,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35063 conditions, 4591 events. 2823/4591 cut-off events. For 294254/294258 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 27481 event pairs, 678 based on Foata normal form. 4/4594 useless extension candidates. Maximal degree in co-relation 34973. Up to 4087 conditions per place. [2024-06-20 15:47:04,700 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 229 selfloop transitions, 53 changer transitions 0/287 dead transitions. [2024-06-20 15:47:04,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 287 transitions, 3955 flow [2024-06-20 15:47:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 15:47:04,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-20 15:47:04,701 INFO L175 Difference]: Start difference. First operand has 195 places, 259 transitions, 2941 flow. Second operand 8 states and 150 transitions. [2024-06-20 15:47:04,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 287 transitions, 3955 flow [2024-06-20 15:47:05,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 287 transitions, 3699 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-20 15:47:05,040 INFO L231 Difference]: Finished difference. Result has 194 places, 267 transitions, 2975 flow [2024-06-20 15:47:05,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2975, PETRI_PLACES=194, PETRI_TRANSITIONS=267} [2024-06-20 15:47:05,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-20 15:47:05,041 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 267 transitions, 2975 flow [2024-06-20 15:47:05,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:05,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:05,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:05,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:47:05,041 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)] === [2024-06-20 15:47:05,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:05,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1201234728, now seen corresponding path program 1 times [2024-06-20 15:47:05,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:05,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940930363] [2024-06-20 15:47:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:05,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:05,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:05,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940930363] [2024-06-20 15:47:05,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940930363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:05,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:05,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:05,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232776012] [2024-06-20 15:47:05,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:05,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:05,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:05,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:05,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:06,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:47:06,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 267 transitions, 2975 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:06,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:06,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:47:06,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:06,863 INFO L124 PetriNetUnfolderBase]: 2733/4467 cut-off events. [2024-06-20 15:47:06,864 INFO L125 PetriNetUnfolderBase]: For 308354/308380 co-relation queries the response was YES. [2024-06-20 15:47:06,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34672 conditions, 4467 events. 2733/4467 cut-off events. For 308354/308380 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27052 event pairs, 671 based on Foata normal form. 18/4452 useless extension candidates. Maximal degree in co-relation 34582. Up to 4016 conditions per place. [2024-06-20 15:47:06,910 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 19 changer transitions 0/289 dead transitions. [2024-06-20 15:47:06,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 289 transitions, 3629 flow [2024-06-20 15:47:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:06,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:47:06,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 15:47:06,912 INFO L175 Difference]: Start difference. First operand has 194 places, 267 transitions, 2975 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:47:06,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 289 transitions, 3629 flow [2024-06-20 15:47:07,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 289 transitions, 3489 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-20 15:47:07,213 INFO L231 Difference]: Finished difference. Result has 198 places, 270 transitions, 2955 flow [2024-06-20 15:47:07,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2835, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2955, PETRI_PLACES=198, PETRI_TRANSITIONS=270} [2024-06-20 15:47:07,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-20 15:47:07,213 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 270 transitions, 2955 flow [2024-06-20 15:47:07,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:07,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:07,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:07,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:47:07,214 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)] === [2024-06-20 15:47:07,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:07,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1201222204, now seen corresponding path program 3 times [2024-06-20 15:47:07,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:07,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896850088] [2024-06-20 15:47:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:07,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:08,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:08,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896850088] [2024-06-20 15:47:08,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896850088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:08,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:08,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:08,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928871187] [2024-06-20 15:47:08,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:08,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:08,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:08,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:47:08,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 270 transitions, 2955 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:08,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:08,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:47:08,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:09,078 INFO L124 PetriNetUnfolderBase]: 2837/4611 cut-off events. [2024-06-20 15:47:09,078 INFO L125 PetriNetUnfolderBase]: For 313675/313679 co-relation queries the response was YES. [2024-06-20 15:47:09,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35767 conditions, 4611 events. 2837/4611 cut-off events. For 313675/313679 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27615 event pairs, 679 based on Foata normal form. 4/4614 useless extension candidates. Maximal degree in co-relation 35675. Up to 4147 conditions per place. [2024-06-20 15:47:09,124 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 238 selfloop transitions, 49 changer transitions 0/292 dead transitions. [2024-06-20 15:47:09,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 292 transitions, 3768 flow [2024-06-20 15:47:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:47:09,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 15:47:09,126 INFO L175 Difference]: Start difference. First operand has 198 places, 270 transitions, 2955 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:47:09,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 292 transitions, 3768 flow [2024-06-20 15:47:09,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 292 transitions, 3672 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:09,475 INFO L231 Difference]: Finished difference. Result has 200 places, 274 transitions, 3047 flow [2024-06-20 15:47:09,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2859, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3047, PETRI_PLACES=200, PETRI_TRANSITIONS=274} [2024-06-20 15:47:09,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-20 15:47:09,476 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 274 transitions, 3047 flow [2024-06-20 15:47:09,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:09,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:09,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:09,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:47:09,477 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)] === [2024-06-20 15:47:09,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:09,477 INFO L85 PathProgramCache]: Analyzing trace with hash 193275976, now seen corresponding path program 3 times [2024-06-20 15:47:09,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:09,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371959678] [2024-06-20 15:47:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:09,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:10,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:10,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371959678] [2024-06-20 15:47:10,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371959678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:10,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:10,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:47:10,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683153871] [2024-06-20 15:47:10,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:10,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:47:10,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:10,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:47:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:47:10,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:47:10,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 274 transitions, 3047 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:10,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:10,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:47:10,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:10,964 INFO L124 PetriNetUnfolderBase]: 2830/4593 cut-off events. [2024-06-20 15:47:10,965 INFO L125 PetriNetUnfolderBase]: For 320774/320776 co-relation queries the response was YES. [2024-06-20 15:47:10,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35924 conditions, 4593 events. 2830/4593 cut-off events. For 320774/320776 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27455 event pairs, 685 based on Foata normal form. 1/4588 useless extension candidates. Maximal degree in co-relation 35831. Up to 4193 conditions per place. [2024-06-20 15:47:11,015 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 252 selfloop transitions, 35 changer transitions 0/292 dead transitions. [2024-06-20 15:47:11,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 292 transitions, 3683 flow [2024-06-20 15:47:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:47:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:47:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 15:47:11,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-20 15:47:11,017 INFO L175 Difference]: Start difference. First operand has 200 places, 274 transitions, 3047 flow. Second operand 7 states and 131 transitions. [2024-06-20 15:47:11,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 292 transitions, 3683 flow [2024-06-20 15:47:11,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 292 transitions, 3510 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:11,382 INFO L231 Difference]: Finished difference. Result has 201 places, 274 transitions, 2951 flow [2024-06-20 15:47:11,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2874, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2951, PETRI_PLACES=201, PETRI_TRANSITIONS=274} [2024-06-20 15:47:11,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-20 15:47:11,382 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 274 transitions, 2951 flow [2024-06-20 15:47:11,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:11,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:11,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:11,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:47:11,382 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)] === [2024-06-20 15:47:11,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:11,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1891917752, now seen corresponding path program 4 times [2024-06-20 15:47:11,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:11,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166248699] [2024-06-20 15:47:11,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:11,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:12,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:12,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166248699] [2024-06-20 15:47:12,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166248699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:12,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:12,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:47:12,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027635475] [2024-06-20 15:47:12,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:12,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:47:12,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:12,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:47:12,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:47:12,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:47:12,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 274 transitions, 2951 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:12,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:12,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:47:12,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:12,860 INFO L124 PetriNetUnfolderBase]: 2835/4601 cut-off events. [2024-06-20 15:47:12,860 INFO L125 PetriNetUnfolderBase]: For 330392/330394 co-relation queries the response was YES. [2024-06-20 15:47:12,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36073 conditions, 4601 events. 2835/4601 cut-off events. For 330392/330394 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27485 event pairs, 677 based on Foata normal form. 1/4596 useless extension candidates. Maximal degree in co-relation 35979. Up to 4180 conditions per place. [2024-06-20 15:47:12,906 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 243 selfloop transitions, 44 changer transitions 0/292 dead transitions. [2024-06-20 15:47:12,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 292 transitions, 3633 flow [2024-06-20 15:47:12,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:47:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:47:12,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 15:47:12,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-20 15:47:12,907 INFO L175 Difference]: Start difference. First operand has 201 places, 274 transitions, 2951 flow. Second operand 7 states and 130 transitions. [2024-06-20 15:47:12,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 292 transitions, 3633 flow [2024-06-20 15:47:13,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 292 transitions, 3501 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 15:47:13,291 INFO L231 Difference]: Finished difference. Result has 201 places, 277 transitions, 2977 flow [2024-06-20 15:47:13,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2819, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2977, PETRI_PLACES=201, PETRI_TRANSITIONS=277} [2024-06-20 15:47:13,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-20 15:47:13,291 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 277 transitions, 2977 flow [2024-06-20 15:47:13,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:13,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:13,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:13,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:47:13,292 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)] === [2024-06-20 15:47:13,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:13,292 INFO L85 PathProgramCache]: Analyzing trace with hash 219371592, now seen corresponding path program 5 times [2024-06-20 15:47:13,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:13,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251329539] [2024-06-20 15:47:13,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:13,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:13,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:13,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251329539] [2024-06-20 15:47:13,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251329539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:13,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:13,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:47:13,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652058752] [2024-06-20 15:47:13,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:13,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:47:13,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:13,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:47:13,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:47:14,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:47:14,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 277 transitions, 2977 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:14,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:14,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:47:14,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:14,786 INFO L124 PetriNetUnfolderBase]: 2840/4615 cut-off events. [2024-06-20 15:47:14,786 INFO L125 PetriNetUnfolderBase]: For 340986/340990 co-relation queries the response was YES. [2024-06-20 15:47:14,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36306 conditions, 4615 events. 2840/4615 cut-off events. For 340986/340990 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27620 event pairs, 700 based on Foata normal form. 3/4612 useless extension candidates. Maximal degree in co-relation 36211. Up to 4123 conditions per place. [2024-06-20 15:47:14,832 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 223 selfloop transitions, 64 changer transitions 0/292 dead transitions. [2024-06-20 15:47:14,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 292 transitions, 3767 flow [2024-06-20 15:47:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:47:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:47:14,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 15:47:14,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-20 15:47:14,833 INFO L175 Difference]: Start difference. First operand has 201 places, 277 transitions, 2977 flow. Second operand 7 states and 129 transitions. [2024-06-20 15:47:14,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 292 transitions, 3767 flow [2024-06-20 15:47:15,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 292 transitions, 3641 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:47:15,211 INFO L231 Difference]: Finished difference. Result has 203 places, 280 transitions, 3049 flow [2024-06-20 15:47:15,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2851, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3049, PETRI_PLACES=203, PETRI_TRANSITIONS=280} [2024-06-20 15:47:15,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-20 15:47:15,212 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 280 transitions, 3049 flow [2024-06-20 15:47:15,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:15,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:15,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:15,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:47:15,212 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)] === [2024-06-20 15:47:15,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:15,213 INFO L85 PathProgramCache]: Analyzing trace with hash 219164202, now seen corresponding path program 6 times [2024-06-20 15:47:15,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:15,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393617798] [2024-06-20 15:47:15,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:15,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:15,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:15,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393617798] [2024-06-20 15:47:15,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393617798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:15,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:15,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:47:15,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6566714] [2024-06-20 15:47:15,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:15,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:47:15,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:15,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:47:15,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:47:15,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:47:15,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 280 transitions, 3049 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:15,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:15,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:47:15,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:16,725 INFO L124 PetriNetUnfolderBase]: 2832/4603 cut-off events. [2024-06-20 15:47:16,725 INFO L125 PetriNetUnfolderBase]: For 349534/349538 co-relation queries the response was YES. [2024-06-20 15:47:16,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36290 conditions, 4603 events. 2832/4603 cut-off events. For 349534/349538 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 27516 event pairs, 700 based on Foata normal form. 4/4601 useless extension candidates. Maximal degree in co-relation 36194. Up to 4115 conditions per place. [2024-06-20 15:47:16,774 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 226 selfloop transitions, 60 changer transitions 0/291 dead transitions. [2024-06-20 15:47:16,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 291 transitions, 3655 flow [2024-06-20 15:47:16,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:47:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:47:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 15:47:16,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-20 15:47:16,775 INFO L175 Difference]: Start difference. First operand has 203 places, 280 transitions, 3049 flow. Second operand 7 states and 129 transitions. [2024-06-20 15:47:16,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 291 transitions, 3655 flow [2024-06-20 15:47:17,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 291 transitions, 3450 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-20 15:47:17,134 INFO L231 Difference]: Finished difference. Result has 206 places, 280 transitions, 2972 flow [2024-06-20 15:47:17,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2844, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2972, PETRI_PLACES=206, PETRI_TRANSITIONS=280} [2024-06-20 15:47:17,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-20 15:47:17,135 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 280 transitions, 2972 flow [2024-06-20 15:47:17,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:17,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:17,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:17,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:47:17,136 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:17,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:17,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1789047941, now seen corresponding path program 2 times [2024-06-20 15:47:17,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:17,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099618441] [2024-06-20 15:47:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:17,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:18,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:18,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099618441] [2024-06-20 15:47:18,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099618441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:18,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:18,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:47:18,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604210520] [2024-06-20 15:47:18,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:18,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:47:18,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:18,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:47:18,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:47:18,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:47:18,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 280 transitions, 2972 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-20 15:47:18,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:18,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:47:18,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:19,423 INFO L124 PetriNetUnfolderBase]: 2914/4729 cut-off events. [2024-06-20 15:47:19,423 INFO L125 PetriNetUnfolderBase]: For 371395/371397 co-relation queries the response was YES. [2024-06-20 15:47:19,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37046 conditions, 4729 events. 2914/4729 cut-off events. For 371395/371397 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 28416 event pairs, 710 based on Foata normal form. 12/4735 useless extension candidates. Maximal degree in co-relation 36949. Up to 3813 conditions per place. [2024-06-20 15:47:19,474 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 219 selfloop transitions, 111 changer transitions 0/335 dead transitions. [2024-06-20 15:47:19,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 335 transitions, 3919 flow [2024-06-20 15:47:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:47:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:47:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-20 15:47:19,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-20 15:47:19,476 INFO L175 Difference]: Start difference. First operand has 206 places, 280 transitions, 2972 flow. Second operand 12 states and 230 transitions. [2024-06-20 15:47:19,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 335 transitions, 3919 flow [2024-06-20 15:47:19,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 335 transitions, 3772 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:47:19,908 INFO L231 Difference]: Finished difference. Result has 213 places, 287 transitions, 3171 flow [2024-06-20 15:47:19,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3171, PETRI_PLACES=213, PETRI_TRANSITIONS=287} [2024-06-20 15:47:19,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-20 15:47:19,909 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 287 transitions, 3171 flow [2024-06-20 15:47:19,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-20 15:47:19,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:19,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:19,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:47:19,909 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:19,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:19,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1750189367, now seen corresponding path program 3 times [2024-06-20 15:47:19,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:19,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509764804] [2024-06-20 15:47:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:19,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:20,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:20,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509764804] [2024-06-20 15:47:20,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509764804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:20,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:20,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:47:20,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277544618] [2024-06-20 15:47:20,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:20,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:47:20,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:20,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:47:20,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:47:21,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:47:21,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 287 transitions, 3171 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-20 15:47:21,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:21,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:47:21,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:22,374 INFO L124 PetriNetUnfolderBase]: 3031/4955 cut-off events. [2024-06-20 15:47:22,374 INFO L125 PetriNetUnfolderBase]: For 387832/387834 co-relation queries the response was YES. [2024-06-20 15:47:22,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38907 conditions, 4955 events. 3031/4955 cut-off events. For 387832/387834 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30393 event pairs, 702 based on Foata normal form. 12/4961 useless extension candidates. Maximal degree in co-relation 38807. Up to 4002 conditions per place. [2024-06-20 15:47:22,431 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 224 selfloop transitions, 127 changer transitions 0/356 dead transitions. [2024-06-20 15:47:22,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 356 transitions, 4280 flow [2024-06-20 15:47:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:47:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:47:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 247 transitions. [2024-06-20 15:47:22,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 15:47:22,432 INFO L175 Difference]: Start difference. First operand has 213 places, 287 transitions, 3171 flow. Second operand 13 states and 247 transitions. [2024-06-20 15:47:22,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 356 transitions, 4280 flow [2024-06-20 15:47:22,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 356 transitions, 4019 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 15:47:22,940 INFO L231 Difference]: Finished difference. Result has 220 places, 300 transitions, 3389 flow [2024-06-20 15:47:22,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3389, PETRI_PLACES=220, PETRI_TRANSITIONS=300} [2024-06-20 15:47:22,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-20 15:47:22,940 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 300 transitions, 3389 flow [2024-06-20 15:47:22,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-20 15:47:22,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:22,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:22,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:47:22,941 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:22,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:22,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1806400011, now seen corresponding path program 4 times [2024-06-20 15:47:22,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:22,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955306677] [2024-06-20 15:47:22,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:22,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:23,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:23,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955306677] [2024-06-20 15:47:23,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955306677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:23,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:23,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:47:23,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697724028] [2024-06-20 15:47:23,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:23,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:47:23,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:23,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:47:23,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:47:24,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:47:24,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 300 transitions, 3389 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-20 15:47:24,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:24,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:47:24,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:25,354 INFO L124 PetriNetUnfolderBase]: 3052/5004 cut-off events. [2024-06-20 15:47:25,355 INFO L125 PetriNetUnfolderBase]: For 384936/384938 co-relation queries the response was YES. [2024-06-20 15:47:25,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38956 conditions, 5004 events. 3052/5004 cut-off events. For 384936/384938 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 30764 event pairs, 644 based on Foata normal form. 12/5010 useless extension candidates. Maximal degree in co-relation 38853. Up to 3224 conditions per place. [2024-06-20 15:47:25,400 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 211 selfloop transitions, 139 changer transitions 0/355 dead transitions. [2024-06-20 15:47:25,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 355 transitions, 4440 flow [2024-06-20 15:47:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:47:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:47:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-06-20 15:47:25,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-20 15:47:25,401 INFO L175 Difference]: Start difference. First operand has 220 places, 300 transitions, 3389 flow. Second operand 12 states and 232 transitions. [2024-06-20 15:47:25,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 355 transitions, 4440 flow [2024-06-20 15:47:25,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 355 transitions, 4208 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 15:47:25,856 INFO L231 Difference]: Finished difference. Result has 226 places, 301 transitions, 3505 flow [2024-06-20 15:47:25,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3505, PETRI_PLACES=226, PETRI_TRANSITIONS=301} [2024-06-20 15:47:25,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-20 15:47:25,857 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 301 transitions, 3505 flow [2024-06-20 15:47:25,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-20 15:47:25,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:25,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:25,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:47:25,858 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:25,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:25,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1463200429, now seen corresponding path program 5 times [2024-06-20 15:47:25,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:25,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334098088] [2024-06-20 15:47:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:25,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:26,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:26,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334098088] [2024-06-20 15:47:26,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334098088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:26,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:26,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:47:26,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026115383] [2024-06-20 15:47:26,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:26,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:47:26,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:26,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:47:26,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:47:26,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:47:26,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 301 transitions, 3505 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-20 15:47:26,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:26,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:47:26,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:28,330 INFO L124 PetriNetUnfolderBase]: 3032/4972 cut-off events. [2024-06-20 15:47:28,330 INFO L125 PetriNetUnfolderBase]: For 379938/379940 co-relation queries the response was YES. [2024-06-20 15:47:28,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38260 conditions, 4972 events. 3032/4972 cut-off events. For 379938/379940 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 30623 event pairs, 689 based on Foata normal form. 12/4978 useless extension candidates. Maximal degree in co-relation 38155. Up to 4009 conditions per place. [2024-06-20 15:47:28,381 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 226 selfloop transitions, 123 changer transitions 0/354 dead transitions. [2024-06-20 15:47:28,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 354 transitions, 4345 flow [2024-06-20 15:47:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:47:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:47:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 248 transitions. [2024-06-20 15:47:28,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542124542124542 [2024-06-20 15:47:28,383 INFO L175 Difference]: Start difference. First operand has 226 places, 301 transitions, 3505 flow. Second operand 13 states and 248 transitions. [2024-06-20 15:47:28,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 354 transitions, 4345 flow [2024-06-20 15:47:28,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 354 transitions, 4012 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-20 15:47:28,836 INFO L231 Difference]: Finished difference. Result has 228 places, 300 transitions, 3352 flow [2024-06-20 15:47:28,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3352, PETRI_PLACES=228, PETRI_TRANSITIONS=300} [2024-06-20 15:47:28,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-20 15:47:28,837 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 300 transitions, 3352 flow [2024-06-20 15:47:28,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-20 15:47:28,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:28,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:28,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:47:28,838 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)] === [2024-06-20 15:47:28,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:28,838 INFO L85 PathProgramCache]: Analyzing trace with hash 227475736, now seen corresponding path program 4 times [2024-06-20 15:47:28,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:28,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989456425] [2024-06-20 15:47:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:28,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:29,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:29,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989456425] [2024-06-20 15:47:29,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989456425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:29,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:29,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:29,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484784148] [2024-06-20 15:47:29,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:29,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:29,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:29,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:29,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:47:29,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 300 transitions, 3352 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:29,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:29,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:47:29,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:30,730 INFO L124 PetriNetUnfolderBase]: 3060/5026 cut-off events. [2024-06-20 15:47:30,730 INFO L125 PetriNetUnfolderBase]: For 381984/381988 co-relation queries the response was YES. [2024-06-20 15:47:30,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38306 conditions, 5026 events. 3060/5026 cut-off events. For 381984/381988 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 31070 event pairs, 732 based on Foata normal form. 4/5024 useless extension candidates. Maximal degree in co-relation 38201. Up to 4387 conditions per place. [2024-06-20 15:47:30,785 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 239 selfloop transitions, 89 changer transitions 0/333 dead transitions. [2024-06-20 15:47:30,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 333 transitions, 4646 flow [2024-06-20 15:47:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 15:47:30,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 15:47:30,786 INFO L175 Difference]: Start difference. First operand has 228 places, 300 transitions, 3352 flow. Second operand 8 states and 147 transitions. [2024-06-20 15:47:30,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 333 transitions, 4646 flow [2024-06-20 15:47:31,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 333 transitions, 4155 flow, removed 12 selfloop flow, removed 16 redundant places. [2024-06-20 15:47:31,284 INFO L231 Difference]: Finished difference. Result has 222 places, 317 transitions, 3389 flow [2024-06-20 15:47:31,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2861, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3389, PETRI_PLACES=222, PETRI_TRANSITIONS=317} [2024-06-20 15:47:31,284 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-20 15:47:31,284 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 317 transitions, 3389 flow [2024-06-20 15:47:31,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:31,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:31,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:31,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:47:31,285 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)] === [2024-06-20 15:47:31,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:31,285 INFO L85 PathProgramCache]: Analyzing trace with hash 227476170, now seen corresponding path program 2 times [2024-06-20 15:47:31,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:31,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099502602] [2024-06-20 15:47:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:31,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:32,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:32,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099502602] [2024-06-20 15:47:32,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099502602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:32,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:32,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:32,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006849532] [2024-06-20 15:47:32,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:32,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:32,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:32,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:32,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:32,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:47:32,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 317 transitions, 3389 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:32,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:32,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:47:32,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:33,138 INFO L124 PetriNetUnfolderBase]: 2992/4928 cut-off events. [2024-06-20 15:47:33,138 INFO L125 PetriNetUnfolderBase]: For 403292/403327 co-relation queries the response was YES. [2024-06-20 15:47:33,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37720 conditions, 4928 events. 2992/4928 cut-off events. For 403292/403327 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30774 event pairs, 698 based on Foata normal form. 23/4919 useless extension candidates. Maximal degree in co-relation 37616. Up to 4377 conditions per place. [2024-06-20 15:47:33,193 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 262 selfloop transitions, 43 changer transitions 0/344 dead transitions. [2024-06-20 15:47:33,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 344 transitions, 4575 flow [2024-06-20 15:47:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 15:47:33,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-20 15:47:33,195 INFO L175 Difference]: Start difference. First operand has 222 places, 317 transitions, 3389 flow. Second operand 8 states and 150 transitions. [2024-06-20 15:47:33,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 344 transitions, 4575 flow [2024-06-20 15:47:33,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 344 transitions, 4383 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-20 15:47:33,669 INFO L231 Difference]: Finished difference. Result has 227 places, 326 transitions, 3541 flow [2024-06-20 15:47:33,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3197, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3541, PETRI_PLACES=227, PETRI_TRANSITIONS=326} [2024-06-20 15:47:33,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-20 15:47:33,670 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 326 transitions, 3541 flow [2024-06-20 15:47:33,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:33,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:33,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:33,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:47:33,670 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)] === [2024-06-20 15:47:33,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:33,671 INFO L85 PathProgramCache]: Analyzing trace with hash 227490120, now seen corresponding path program 3 times [2024-06-20 15:47:33,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:33,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632489303] [2024-06-20 15:47:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:33,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:34,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:34,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632489303] [2024-06-20 15:47:34,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632489303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:34,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:34,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:34,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283297114] [2024-06-20 15:47:34,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:34,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:34,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:34,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:34,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:47:34,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 326 transitions, 3541 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:34,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:34,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:47:34,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:35,687 INFO L124 PetriNetUnfolderBase]: 2986/4902 cut-off events. [2024-06-20 15:47:35,688 INFO L125 PetriNetUnfolderBase]: For 412218/412245 co-relation queries the response was YES. [2024-06-20 15:47:35,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37387 conditions, 4902 events. 2986/4902 cut-off events. For 412218/412245 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30496 event pairs, 726 based on Foata normal form. 17/4877 useless extension candidates. Maximal degree in co-relation 37281. Up to 4430 conditions per place. [2024-06-20 15:47:35,742 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 280 selfloop transitions, 19 changer transitions 0/338 dead transitions. [2024-06-20 15:47:35,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 338 transitions, 4177 flow [2024-06-20 15:47:35,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:35,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 15:47:35,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 15:47:35,743 INFO L175 Difference]: Start difference. First operand has 227 places, 326 transitions, 3541 flow. Second operand 8 states and 142 transitions. [2024-06-20 15:47:35,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 338 transitions, 4177 flow [2024-06-20 15:47:36,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 338 transitions, 4006 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-20 15:47:36,387 INFO L231 Difference]: Finished difference. Result has 232 places, 326 transitions, 3415 flow [2024-06-20 15:47:36,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3415, PETRI_PLACES=232, PETRI_TRANSITIONS=326} [2024-06-20 15:47:36,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-20 15:47:36,387 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 326 transitions, 3415 flow [2024-06-20 15:47:36,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:36,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:36,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:36,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:47:36,388 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)] === [2024-06-20 15:47:36,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:36,388 INFO L85 PathProgramCache]: Analyzing trace with hash 213654076, now seen corresponding path program 5 times [2024-06-20 15:47:36,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:36,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415775978] [2024-06-20 15:47:36,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:36,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:37,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:37,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415775978] [2024-06-20 15:47:37,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415775978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:37,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:37,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:37,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301257939] [2024-06-20 15:47:37,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:37,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:37,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:37,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:37,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:37,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:47:37,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 326 transitions, 3415 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:37,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:37,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:47:37,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:38,438 INFO L124 PetriNetUnfolderBase]: 3090/5060 cut-off events. [2024-06-20 15:47:38,438 INFO L125 PetriNetUnfolderBase]: For 414862/414866 co-relation queries the response was YES. [2024-06-20 15:47:38,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38283 conditions, 5060 events. 3090/5060 cut-off events. For 414862/414866 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 31229 event pairs, 735 based on Foata normal form. 4/5058 useless extension candidates. Maximal degree in co-relation 38175. Up to 4534 conditions per place. [2024-06-20 15:47:38,488 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 66 changer transitions 0/342 dead transitions. [2024-06-20 15:47:38,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 342 transitions, 4214 flow [2024-06-20 15:47:38,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:38,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:38,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 15:47:38,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 15:47:38,489 INFO L175 Difference]: Start difference. First operand has 232 places, 326 transitions, 3415 flow. Second operand 8 states and 143 transitions. [2024-06-20 15:47:38,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 342 transitions, 4214 flow [2024-06-20 15:47:39,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 342 transitions, 4166 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:47:39,080 INFO L231 Difference]: Finished difference. Result has 233 places, 330 transitions, 3603 flow [2024-06-20 15:47:39,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3367, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3603, PETRI_PLACES=233, PETRI_TRANSITIONS=330} [2024-06-20 15:47:39,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-20 15:47:39,080 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 330 transitions, 3603 flow [2024-06-20 15:47:39,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:39,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:39,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:39,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:47:39,081 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)] === [2024-06-20 15:47:39,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:39,081 INFO L85 PathProgramCache]: Analyzing trace with hash 213666166, now seen corresponding path program 6 times [2024-06-20 15:47:39,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:39,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370753772] [2024-06-20 15:47:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:39,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:40,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:40,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370753772] [2024-06-20 15:47:40,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370753772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:40,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:40,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:40,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466794354] [2024-06-20 15:47:40,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:40,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:40,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:40,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:40,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:40,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:47:40,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 330 transitions, 3603 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:40,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:40,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:47:40,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:41,096 INFO L124 PetriNetUnfolderBase]: 3094/5067 cut-off events. [2024-06-20 15:47:41,096 INFO L125 PetriNetUnfolderBase]: For 424517/424521 co-relation queries the response was YES. [2024-06-20 15:47:41,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38714 conditions, 5067 events. 3094/5067 cut-off events. For 424517/424521 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 31225 event pairs, 734 based on Foata normal form. 4/5065 useless extension candidates. Maximal degree in co-relation 38605. Up to 4512 conditions per place. [2024-06-20 15:47:41,151 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 274 selfloop transitions, 70 changer transitions 0/349 dead transitions. [2024-06-20 15:47:41,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 349 transitions, 4615 flow [2024-06-20 15:47:41,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 15:47:41,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 15:47:41,152 INFO L175 Difference]: Start difference. First operand has 233 places, 330 transitions, 3603 flow. Second operand 8 states and 145 transitions. [2024-06-20 15:47:41,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 349 transitions, 4615 flow [2024-06-20 15:47:41,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 349 transitions, 4416 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:41,757 INFO L231 Difference]: Finished difference. Result has 236 places, 336 transitions, 3723 flow [2024-06-20 15:47:41,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3723, PETRI_PLACES=236, PETRI_TRANSITIONS=336} [2024-06-20 15:47:41,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-20 15:47:41,758 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 336 transitions, 3723 flow [2024-06-20 15:47:41,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:41,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:41,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:41,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:47:41,758 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)] === [2024-06-20 15:47:41,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:41,758 INFO L85 PathProgramCache]: Analyzing trace with hash 139930496, now seen corresponding path program 4 times [2024-06-20 15:47:41,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:41,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283814050] [2024-06-20 15:47:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:41,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:42,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:42,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283814050] [2024-06-20 15:47:42,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283814050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:42,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:42,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:42,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373095795] [2024-06-20 15:47:42,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:42,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:42,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:42,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:42,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:47:42,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 336 transitions, 3723 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:42,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:42,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:47:42,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:43,609 INFO L124 PetriNetUnfolderBase]: 2994/4937 cut-off events. [2024-06-20 15:47:43,609 INFO L125 PetriNetUnfolderBase]: For 439048/439083 co-relation queries the response was YES. [2024-06-20 15:47:43,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38031 conditions, 4937 events. 2994/4937 cut-off events. For 439048/439083 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30785 event pairs, 696 based on Foata normal form. 23/4928 useless extension candidates. Maximal degree in co-relation 37920. Up to 4417 conditions per place. [2024-06-20 15:47:43,666 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 285 selfloop transitions, 24 changer transitions 0/350 dead transitions. [2024-06-20 15:47:43,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 350 transitions, 4391 flow [2024-06-20 15:47:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:43,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 15:47:43,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 15:47:43,667 INFO L175 Difference]: Start difference. First operand has 236 places, 336 transitions, 3723 flow. Second operand 8 states and 143 transitions. [2024-06-20 15:47:43,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 350 transitions, 4391 flow [2024-06-20 15:47:44,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 350 transitions, 4175 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-20 15:47:44,279 INFO L231 Difference]: Finished difference. Result has 240 places, 336 transitions, 3561 flow [2024-06-20 15:47:44,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3561, PETRI_PLACES=240, PETRI_TRANSITIONS=336} [2024-06-20 15:47:44,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-20 15:47:44,280 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 336 transitions, 3561 flow [2024-06-20 15:47:44,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:44,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:44,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:44,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:47:44,280 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)] === [2024-06-20 15:47:44,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:44,281 INFO L85 PathProgramCache]: Analyzing trace with hash 760697390, now seen corresponding path program 1 times [2024-06-20 15:47:44,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:44,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169318151] [2024-06-20 15:47:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:44,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:45,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:45,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169318151] [2024-06-20 15:47:45,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169318151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:45,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:45,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:45,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413386054] [2024-06-20 15:47:45,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:45,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:45,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:45,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:45,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:45,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:47:45,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 336 transitions, 3561 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:45,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:45,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:47:45,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:46,210 INFO L124 PetriNetUnfolderBase]: 3001/4976 cut-off events. [2024-06-20 15:47:46,210 INFO L125 PetriNetUnfolderBase]: For 440942/440944 co-relation queries the response was YES. [2024-06-20 15:47:46,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38186 conditions, 4976 events. 3001/4976 cut-off events. For 440942/440944 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 31094 event pairs, 728 based on Foata normal form. 1/4976 useless extension candidates. Maximal degree in co-relation 38073. Up to 4510 conditions per place. [2024-06-20 15:47:46,267 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 322 selfloop transitions, 17 changer transitions 0/359 dead transitions. [2024-06-20 15:47:46,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 359 transitions, 4361 flow [2024-06-20 15:47:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:46,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 15:47:46,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 15:47:46,268 INFO L175 Difference]: Start difference. First operand has 240 places, 336 transitions, 3561 flow. Second operand 8 states and 149 transitions. [2024-06-20 15:47:46,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 359 transitions, 4361 flow [2024-06-20 15:47:47,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 359 transitions, 4277 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:47:47,017 INFO L231 Difference]: Finished difference. Result has 241 places, 339 transitions, 3585 flow [2024-06-20 15:47:47,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3477, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3585, PETRI_PLACES=241, PETRI_TRANSITIONS=339} [2024-06-20 15:47:47,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-20 15:47:47,018 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 339 transitions, 3585 flow [2024-06-20 15:47:47,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:47,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:47,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:47,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:47:47,018 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)] === [2024-06-20 15:47:47,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:47,018 INFO L85 PathProgramCache]: Analyzing trace with hash 756233576, now seen corresponding path program 1 times [2024-06-20 15:47:47,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:47,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514593052] [2024-06-20 15:47:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:47,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:47,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:47,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514593052] [2024-06-20 15:47:47,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514593052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:47,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:47,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:47,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244459742] [2024-06-20 15:47:47,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:47,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:47,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:47,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:47,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:47,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:47:47,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 339 transitions, 3585 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:47,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:47,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:47:47,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:48,889 INFO L124 PetriNetUnfolderBase]: 3012/4995 cut-off events. [2024-06-20 15:47:48,889 INFO L125 PetriNetUnfolderBase]: For 460729/460731 co-relation queries the response was YES. [2024-06-20 15:47:48,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38787 conditions, 4995 events. 3012/4995 cut-off events. For 460729/460731 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 31232 event pairs, 727 based on Foata normal form. 4/4998 useless extension candidates. Maximal degree in co-relation 38673. Up to 4525 conditions per place. [2024-06-20 15:47:48,947 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 323 selfloop transitions, 18 changer transitions 0/361 dead transitions. [2024-06-20 15:47:48,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 361 transitions, 4385 flow [2024-06-20 15:47:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:47:48,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 15:47:48,948 INFO L175 Difference]: Start difference. First operand has 241 places, 339 transitions, 3585 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:47:48,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 361 transitions, 4385 flow [2024-06-20 15:47:49,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 361 transitions, 4299 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:49,772 INFO L231 Difference]: Finished difference. Result has 243 places, 343 transitions, 3610 flow [2024-06-20 15:47:49,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3499, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3610, PETRI_PLACES=243, PETRI_TRANSITIONS=343} [2024-06-20 15:47:49,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-20 15:47:49,772 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 343 transitions, 3610 flow [2024-06-20 15:47:49,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:49,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:49,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:49,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:47:49,773 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)] === [2024-06-20 15:47:49,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:49,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1891903120, now seen corresponding path program 2 times [2024-06-20 15:47:49,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:49,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107105056] [2024-06-20 15:47:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:49,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:50,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:50,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107105056] [2024-06-20 15:47:50,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107105056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:50,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:50,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:50,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515255934] [2024-06-20 15:47:50,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:50,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:50,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:50,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:50,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:50,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:47:50,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 343 transitions, 3610 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:50,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:50,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:47:50,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:51,790 INFO L124 PetriNetUnfolderBase]: 3070/5081 cut-off events. [2024-06-20 15:47:51,790 INFO L125 PetriNetUnfolderBase]: For 490148/490150 co-relation queries the response was YES. [2024-06-20 15:47:51,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40677 conditions, 5081 events. 3070/5081 cut-off events. For 490148/490150 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 31799 event pairs, 726 based on Foata normal form. 3/5083 useless extension candidates. Maximal degree in co-relation 40562. Up to 4552 conditions per place. [2024-06-20 15:47:51,849 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 316 selfloop transitions, 35 changer transitions 0/371 dead transitions. [2024-06-20 15:47:51,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 371 transitions, 4699 flow [2024-06-20 15:47:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 15:47:51,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 15:47:51,851 INFO L175 Difference]: Start difference. First operand has 243 places, 343 transitions, 3610 flow. Second operand 8 states and 151 transitions. [2024-06-20 15:47:51,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 371 transitions, 4699 flow [2024-06-20 15:47:52,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 371 transitions, 4616 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:52,666 INFO L231 Difference]: Finished difference. Result has 246 places, 353 transitions, 3809 flow [2024-06-20 15:47:52,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3527, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3809, PETRI_PLACES=246, PETRI_TRANSITIONS=353} [2024-06-20 15:47:52,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-20 15:47:52,666 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 353 transitions, 3809 flow [2024-06-20 15:47:52,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:52,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:52,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:52,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:47:52,667 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)] === [2024-06-20 15:47:52,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:52,667 INFO L85 PathProgramCache]: Analyzing trace with hash 760875206, now seen corresponding path program 3 times [2024-06-20 15:47:52,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:52,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496195001] [2024-06-20 15:47:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:52,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:53,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:53,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496195001] [2024-06-20 15:47:53,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496195001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:53,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:53,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:53,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909971102] [2024-06-20 15:47:53,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:53,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:53,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:53,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:53,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:53,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:47:53,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 353 transitions, 3809 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:53,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:53,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:47:53,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:54,613 INFO L124 PetriNetUnfolderBase]: 3073/5084 cut-off events. [2024-06-20 15:47:54,613 INFO L125 PetriNetUnfolderBase]: For 504370/504372 co-relation queries the response was YES. [2024-06-20 15:47:54,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41391 conditions, 5084 events. 3073/5084 cut-off events. For 504370/504372 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 31818 event pairs, 728 based on Foata normal form. 6/5089 useless extension candidates. Maximal degree in co-relation 41274. Up to 4593 conditions per place. [2024-06-20 15:47:54,673 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 331 selfloop transitions, 23 changer transitions 0/374 dead transitions. [2024-06-20 15:47:54,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 374 transitions, 4673 flow [2024-06-20 15:47:54,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 15:47:54,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 15:47:54,677 INFO L175 Difference]: Start difference. First operand has 246 places, 353 transitions, 3809 flow. Second operand 8 states and 149 transitions. [2024-06-20 15:47:54,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 374 transitions, 4673 flow [2024-06-20 15:47:55,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 374 transitions, 4597 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 15:47:55,446 INFO L231 Difference]: Finished difference. Result has 250 places, 357 transitions, 3872 flow [2024-06-20 15:47:55,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3743, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3872, PETRI_PLACES=250, PETRI_TRANSITIONS=357} [2024-06-20 15:47:55,446 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-20 15:47:55,447 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 357 transitions, 3872 flow [2024-06-20 15:47:55,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:55,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:55,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:55,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:47:55,447 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)] === [2024-06-20 15:47:55,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:55,448 INFO L85 PathProgramCache]: Analyzing trace with hash 219379714, now seen corresponding path program 4 times [2024-06-20 15:47:55,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:55,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174569590] [2024-06-20 15:47:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:55,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:56,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:56,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174569590] [2024-06-20 15:47:56,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174569590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:56,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:56,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:56,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924414017] [2024-06-20 15:47:56,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:56,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:56,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:56,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:56,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:56,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:47:56,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 357 transitions, 3872 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:56,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:56,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:47:56,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:57,489 INFO L124 PetriNetUnfolderBase]: 3088/5108 cut-off events. [2024-06-20 15:47:57,489 INFO L125 PetriNetUnfolderBase]: For 512253/512257 co-relation queries the response was YES. [2024-06-20 15:47:57,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41738 conditions, 5108 events. 3088/5108 cut-off events. For 512253/512257 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31949 event pairs, 734 based on Foata normal form. 4/5111 useless extension candidates. Maximal degree in co-relation 41619. Up to 4606 conditions per place. [2024-06-20 15:47:57,550 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 30 changer transitions 0/374 dead transitions. [2024-06-20 15:47:57,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 374 transitions, 4714 flow [2024-06-20 15:47:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 15:47:57,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 15:47:57,552 INFO L175 Difference]: Start difference. First operand has 250 places, 357 transitions, 3872 flow. Second operand 8 states and 147 transitions. [2024-06-20 15:47:57,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 374 transitions, 4714 flow [2024-06-20 15:47:58,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 374 transitions, 4637 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:58,358 INFO L231 Difference]: Finished difference. Result has 252 places, 361 transitions, 3946 flow [2024-06-20 15:47:58,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3795, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3946, PETRI_PLACES=252, PETRI_TRANSITIONS=361} [2024-06-20 15:47:58,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-20 15:47:58,359 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 361 transitions, 3946 flow [2024-06-20 15:47:58,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:58,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:58,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:58,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:47:58,359 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)] === [2024-06-20 15:47:58,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:58,359 INFO L85 PathProgramCache]: Analyzing trace with hash 219386224, now seen corresponding path program 5 times [2024-06-20 15:47:58,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:58,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55260811] [2024-06-20 15:47:58,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:58,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:59,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:59,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55260811] [2024-06-20 15:47:59,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55260811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:59,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:59,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:59,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564176060] [2024-06-20 15:47:59,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:59,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:59,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:59,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:59,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:59,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:47:59,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 361 transitions, 3946 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:59,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:59,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:47:59,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:00,544 INFO L124 PetriNetUnfolderBase]: 3121/5164 cut-off events. [2024-06-20 15:48:00,544 INFO L125 PetriNetUnfolderBase]: For 528761/528765 co-relation queries the response was YES. [2024-06-20 15:48:00,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42989 conditions, 5164 events. 3121/5164 cut-off events. For 528761/528765 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 32423 event pairs, 737 based on Foata normal form. 3/5166 useless extension candidates. Maximal degree in co-relation 42869. Up to 4623 conditions per place. [2024-06-20 15:48:00,602 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 42 changer transitions 0/383 dead transitions. [2024-06-20 15:48:00,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 383 transitions, 5042 flow [2024-06-20 15:48:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:00,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 15:48:00,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 15:48:00,603 INFO L175 Difference]: Start difference. First operand has 252 places, 361 transitions, 3946 flow. Second operand 8 states and 152 transitions. [2024-06-20 15:48:00,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 383 transitions, 5042 flow [2024-06-20 15:48:01,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 383 transitions, 4919 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 15:48:01,556 INFO L231 Difference]: Finished difference. Result has 255 places, 368 transitions, 4085 flow [2024-06-20 15:48:01,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4085, PETRI_PLACES=255, PETRI_TRANSITIONS=368} [2024-06-20 15:48:01,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-20 15:48:01,556 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 368 transitions, 4085 flow [2024-06-20 15:48:01,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:01,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:01,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:01,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:48:01,557 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)] === [2024-06-20 15:48:01,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:01,557 INFO L85 PathProgramCache]: Analyzing trace with hash 933602246, now seen corresponding path program 6 times [2024-06-20 15:48:01,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:01,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132953267] [2024-06-20 15:48:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:01,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:02,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:02,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132953267] [2024-06-20 15:48:02,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132953267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:02,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:02,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:02,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858996755] [2024-06-20 15:48:02,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:02,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:02,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:02,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:02,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:02,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:48:02,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 368 transitions, 4085 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:02,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:02,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:48:02,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:03,695 INFO L124 PetriNetUnfolderBase]: 3112/5142 cut-off events. [2024-06-20 15:48:03,695 INFO L125 PetriNetUnfolderBase]: For 538886/538890 co-relation queries the response was YES. [2024-06-20 15:48:03,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43519 conditions, 5142 events. 3112/5142 cut-off events. For 538886/538890 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32155 event pairs, 732 based on Foata normal form. 3/5144 useless extension candidates. Maximal degree in co-relation 43397. Up to 4539 conditions per place. [2024-06-20 15:48:03,782 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 296 selfloop transitions, 71 changer transitions 0/387 dead transitions. [2024-06-20 15:48:03,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 387 transitions, 5129 flow [2024-06-20 15:48:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 15:48:03,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 15:48:03,783 INFO L175 Difference]: Start difference. First operand has 255 places, 368 transitions, 4085 flow. Second operand 8 states and 152 transitions. [2024-06-20 15:48:03,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 387 transitions, 5129 flow [2024-06-20 15:48:04,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 387 transitions, 5033 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-20 15:48:04,847 INFO L231 Difference]: Finished difference. Result has 259 places, 371 transitions, 4214 flow [2024-06-20 15:48:04,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3989, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4214, PETRI_PLACES=259, PETRI_TRANSITIONS=371} [2024-06-20 15:48:04,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-20 15:48:04,847 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 371 transitions, 4214 flow [2024-06-20 15:48:04,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:04,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:04,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:04,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:48:04,848 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)] === [2024-06-20 15:48:04,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:04,848 INFO L85 PathProgramCache]: Analyzing trace with hash 154232160, now seen corresponding path program 1 times [2024-06-20 15:48:04,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:04,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488383542] [2024-06-20 15:48:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:04,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:06,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:06,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488383542] [2024-06-20 15:48:06,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488383542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:06,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:06,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:48:06,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82442121] [2024-06-20 15:48:06,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:06,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:48:06,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:06,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:48:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:48:06,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:48:06,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 371 transitions, 4214 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:06,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:06,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:48:06,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:07,749 INFO L124 PetriNetUnfolderBase]: 3114/5100 cut-off events. [2024-06-20 15:48:07,749 INFO L125 PetriNetUnfolderBase]: For 552714/552741 co-relation queries the response was YES. [2024-06-20 15:48:07,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43721 conditions, 5100 events. 3114/5100 cut-off events. For 552714/552741 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 31741 event pairs, 723 based on Foata normal form. 17/5075 useless extension candidates. Maximal degree in co-relation 43597. Up to 4607 conditions per place. [2024-06-20 15:48:07,812 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 325 selfloop transitions, 19 changer transitions 0/386 dead transitions. [2024-06-20 15:48:07,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 386 transitions, 5022 flow [2024-06-20 15:48:07,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:48:07,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:48:07,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 15:48:07,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 15:48:07,813 INFO L175 Difference]: Start difference. First operand has 259 places, 371 transitions, 4214 flow. Second operand 9 states and 155 transitions. [2024-06-20 15:48:07,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 386 transitions, 5022 flow [2024-06-20 15:48:08,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 386 transitions, 4835 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 15:48:08,693 INFO L231 Difference]: Finished difference. Result has 262 places, 373 transitions, 4160 flow [2024-06-20 15:48:08,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4160, PETRI_PLACES=262, PETRI_TRANSITIONS=373} [2024-06-20 15:48:08,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-20 15:48:08,694 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 373 transitions, 4160 flow [2024-06-20 15:48:08,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:08,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:08,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:08,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:48:08,694 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)] === [2024-06-20 15:48:08,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:08,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1741837616, now seen corresponding path program 1 times [2024-06-20 15:48:08,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:08,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914238515] [2024-06-20 15:48:08,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:08,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:09,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:09,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914238515] [2024-06-20 15:48:09,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914238515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:09,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:09,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:09,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381590921] [2024-06-20 15:48:09,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:09,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:09,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:09,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:09,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:09,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:09,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 373 transitions, 4160 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:09,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:09,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:09,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:10,868 INFO L124 PetriNetUnfolderBase]: 3231/5254 cut-off events. [2024-06-20 15:48:10,868 INFO L125 PetriNetUnfolderBase]: For 563804/563812 co-relation queries the response was YES. [2024-06-20 15:48:10,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44804 conditions, 5254 events. 3231/5254 cut-off events. For 563804/563812 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 32235 event pairs, 545 based on Foata normal form. 12/5265 useless extension candidates. Maximal degree in co-relation 44679. Up to 4751 conditions per place. [2024-06-20 15:48:10,954 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 363 selfloop transitions, 37 changer transitions 0/405 dead transitions. [2024-06-20 15:48:10,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 405 transitions, 5152 flow [2024-06-20 15:48:10,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:10,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 15:48:10,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 15:48:10,955 INFO L175 Difference]: Start difference. First operand has 262 places, 373 transitions, 4160 flow. Second operand 8 states and 154 transitions. [2024-06-20 15:48:10,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 405 transitions, 5152 flow [2024-06-20 15:48:11,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 405 transitions, 5035 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-20 15:48:11,831 INFO L231 Difference]: Finished difference. Result has 263 places, 376 transitions, 4227 flow [2024-06-20 15:48:11,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4043, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4227, PETRI_PLACES=263, PETRI_TRANSITIONS=376} [2024-06-20 15:48:11,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-20 15:48:11,832 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 376 transitions, 4227 flow [2024-06-20 15:48:11,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:11,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:11,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:11,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:48:11,832 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)] === [2024-06-20 15:48:11,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:11,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1732314416, now seen corresponding path program 2 times [2024-06-20 15:48:11,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:11,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591122806] [2024-06-20 15:48:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:11,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:12,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:12,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591122806] [2024-06-20 15:48:12,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591122806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:12,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:12,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:12,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228785273] [2024-06-20 15:48:12,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:12,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:12,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:12,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:12,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:12,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:12,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 376 transitions, 4227 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:12,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:12,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:12,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:13,808 INFO L124 PetriNetUnfolderBase]: 3247/5303 cut-off events. [2024-06-20 15:48:13,808 INFO L125 PetriNetUnfolderBase]: For 578060/578068 co-relation queries the response was YES. [2024-06-20 15:48:13,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45502 conditions, 5303 events. 3247/5303 cut-off events. For 578060/578068 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32862 event pairs, 699 based on Foata normal form. 12/5314 useless extension candidates. Maximal degree in co-relation 45376. Up to 4828 conditions per place. [2024-06-20 15:48:13,876 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 361 selfloop transitions, 38 changer transitions 0/404 dead transitions. [2024-06-20 15:48:13,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 404 transitions, 5211 flow [2024-06-20 15:48:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 15:48:13,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 15:48:13,877 INFO L175 Difference]: Start difference. First operand has 263 places, 376 transitions, 4227 flow. Second operand 8 states and 151 transitions. [2024-06-20 15:48:13,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 404 transitions, 5211 flow [2024-06-20 15:48:14,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 404 transitions, 5049 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-20 15:48:14,759 INFO L231 Difference]: Finished difference. Result has 265 places, 379 transitions, 4257 flow [2024-06-20 15:48:14,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4065, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4257, PETRI_PLACES=265, PETRI_TRANSITIONS=379} [2024-06-20 15:48:14,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-20 15:48:14,759 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 379 transitions, 4257 flow [2024-06-20 15:48:14,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:14,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:14,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:14,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:48:14,760 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)] === [2024-06-20 15:48:14,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:14,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1732302512, now seen corresponding path program 1 times [2024-06-20 15:48:14,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:14,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308808934] [2024-06-20 15:48:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:14,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:15,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:15,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308808934] [2024-06-20 15:48:15,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308808934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:15,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:15,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:48:15,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374447683] [2024-06-20 15:48:15,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:15,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:48:15,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:15,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:48:15,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:48:15,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:15,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 379 transitions, 4257 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:48:15,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:15,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:15,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:16,920 INFO L124 PetriNetUnfolderBase]: 3257/5317 cut-off events. [2024-06-20 15:48:16,920 INFO L125 PetriNetUnfolderBase]: For 580915/580923 co-relation queries the response was YES. [2024-06-20 15:48:16,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45786 conditions, 5317 events. 3257/5317 cut-off events. For 580915/580923 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32877 event pairs, 698 based on Foata normal form. 10/5326 useless extension candidates. Maximal degree in co-relation 45659. Up to 4842 conditions per place. [2024-06-20 15:48:16,988 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 360 selfloop transitions, 43 changer transitions 0/408 dead transitions. [2024-06-20 15:48:16,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 408 transitions, 5253 flow [2024-06-20 15:48:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:48:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:48:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 15:48:16,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 15:48:16,989 INFO L175 Difference]: Start difference. First operand has 265 places, 379 transitions, 4257 flow. Second operand 9 states and 166 transitions. [2024-06-20 15:48:16,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 408 transitions, 5253 flow [2024-06-20 15:48:17,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 408 transitions, 5083 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-20 15:48:17,884 INFO L231 Difference]: Finished difference. Result has 268 places, 383 transitions, 4296 flow [2024-06-20 15:48:17,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4087, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4296, PETRI_PLACES=268, PETRI_TRANSITIONS=383} [2024-06-20 15:48:17,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-20 15:48:17,884 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 383 transitions, 4296 flow [2024-06-20 15:48:17,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:48:17,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:17,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:17,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:48:17,885 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)] === [2024-06-20 15:48:17,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:17,885 INFO L85 PathProgramCache]: Analyzing trace with hash 542964728, now seen corresponding path program 3 times [2024-06-20 15:48:17,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:17,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292146986] [2024-06-20 15:48:17,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:17,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:18,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:18,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292146986] [2024-06-20 15:48:18,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292146986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:18,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:18,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:18,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445474390] [2024-06-20 15:48:18,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:18,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:18,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:18,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:18,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:18,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:18,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 383 transitions, 4296 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:18,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:18,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:18,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:19,821 INFO L124 PetriNetUnfolderBase]: 3273/5335 cut-off events. [2024-06-20 15:48:19,821 INFO L125 PetriNetUnfolderBase]: For 601547/601551 co-relation queries the response was YES. [2024-06-20 15:48:19,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46468 conditions, 5335 events. 3273/5335 cut-off events. For 601547/601551 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 32981 event pairs, 708 based on Foata normal form. 6/5340 useless extension candidates. Maximal degree in co-relation 46340. Up to 4824 conditions per place. [2024-06-20 15:48:19,891 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 351 selfloop transitions, 48 changer transitions 0/404 dead transitions. [2024-06-20 15:48:19,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 404 transitions, 5262 flow [2024-06-20 15:48:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 15:48:19,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 15:48:19,892 INFO L175 Difference]: Start difference. First operand has 268 places, 383 transitions, 4296 flow. Second operand 8 states and 146 transitions. [2024-06-20 15:48:19,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 404 transitions, 5262 flow [2024-06-20 15:48:20,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 404 transitions, 5081 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-20 15:48:20,670 INFO L231 Difference]: Finished difference. Result has 269 places, 386 transitions, 4337 flow [2024-06-20 15:48:20,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4115, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4337, PETRI_PLACES=269, PETRI_TRANSITIONS=386} [2024-06-20 15:48:20,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-20 15:48:20,671 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 386 transitions, 4337 flow [2024-06-20 15:48:20,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:20,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:20,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:20,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:48:20,671 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)] === [2024-06-20 15:48:20,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:20,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1582851086, now seen corresponding path program 1 times [2024-06-20 15:48:20,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:20,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094214853] [2024-06-20 15:48:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:20,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:21,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:21,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094214853] [2024-06-20 15:48:21,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094214853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:21,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:21,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:21,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550226543] [2024-06-20 15:48:21,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:21,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:21,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:21,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:21,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:21,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:21,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 386 transitions, 4337 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:21,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:21,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:21,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:22,622 INFO L124 PetriNetUnfolderBase]: 3293/5363 cut-off events. [2024-06-20 15:48:22,622 INFO L125 PetriNetUnfolderBase]: For 616581/616585 co-relation queries the response was YES. [2024-06-20 15:48:22,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47063 conditions, 5363 events. 3293/5363 cut-off events. For 616581/616585 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 33207 event pairs, 701 based on Foata normal form. 4/5366 useless extension candidates. Maximal degree in co-relation 46934. Up to 4749 conditions per place. [2024-06-20 15:48:22,691 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 346 selfloop transitions, 70 changer transitions 0/421 dead transitions. [2024-06-20 15:48:22,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 421 transitions, 5441 flow [2024-06-20 15:48:22,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:22,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 15:48:22,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 15:48:22,692 INFO L175 Difference]: Start difference. First operand has 269 places, 386 transitions, 4337 flow. Second operand 8 states and 154 transitions. [2024-06-20 15:48:22,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 421 transitions, 5441 flow [2024-06-20 15:48:23,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 421 transitions, 5241 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-20 15:48:23,852 INFO L231 Difference]: Finished difference. Result has 272 places, 395 transitions, 4515 flow [2024-06-20 15:48:23,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4137, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4515, PETRI_PLACES=272, PETRI_TRANSITIONS=395} [2024-06-20 15:48:23,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-20 15:48:23,852 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 395 transitions, 4515 flow [2024-06-20 15:48:23,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:23,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:23,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:23,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:48:23,853 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)] === [2024-06-20 15:48:23,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:23,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1582701356, now seen corresponding path program 2 times [2024-06-20 15:48:23,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:23,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642556495] [2024-06-20 15:48:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:23,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:24,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:24,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642556495] [2024-06-20 15:48:24,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642556495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:24,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:24,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:24,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155112723] [2024-06-20 15:48:24,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:24,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:24,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:24,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:24,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:24,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:24,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 395 transitions, 4515 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:24,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:24,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:24,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:25,896 INFO L124 PetriNetUnfolderBase]: 3313/5395 cut-off events. [2024-06-20 15:48:25,896 INFO L125 PetriNetUnfolderBase]: For 635494/635498 co-relation queries the response was YES. [2024-06-20 15:48:25,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48447 conditions, 5395 events. 3313/5395 cut-off events. For 635494/635498 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33400 event pairs, 707 based on Foata normal form. 4/5398 useless extension candidates. Maximal degree in co-relation 48316. Up to 4751 conditions per place. [2024-06-20 15:48:25,975 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 341 selfloop transitions, 76 changer transitions 0/422 dead transitions. [2024-06-20 15:48:25,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 422 transitions, 5581 flow [2024-06-20 15:48:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 15:48:25,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 15:48:25,976 INFO L175 Difference]: Start difference. First operand has 272 places, 395 transitions, 4515 flow. Second operand 8 states and 154 transitions. [2024-06-20 15:48:25,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 422 transitions, 5581 flow [2024-06-20 15:48:27,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 422 transitions, 5381 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-20 15:48:27,016 INFO L231 Difference]: Finished difference. Result has 275 places, 399 transitions, 4602 flow [2024-06-20 15:48:27,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4319, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4602, PETRI_PLACES=275, PETRI_TRANSITIONS=399} [2024-06-20 15:48:27,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-20 15:48:27,017 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 399 transitions, 4602 flow [2024-06-20 15:48:27,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:27,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:27,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:27,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:48:27,018 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)] === [2024-06-20 15:48:27,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1582701139, now seen corresponding path program 1 times [2024-06-20 15:48:27,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:27,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101785358] [2024-06-20 15:48:27,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:27,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:27,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:27,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101785358] [2024-06-20 15:48:27,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101785358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:27,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:27,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:27,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752623892] [2024-06-20 15:48:27,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:27,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:27,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:27,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:27,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:27,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:27,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 399 transitions, 4602 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:27,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:27,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:27,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:29,024 INFO L124 PetriNetUnfolderBase]: 3323/5409 cut-off events. [2024-06-20 15:48:29,024 INFO L125 PetriNetUnfolderBase]: For 646350/646354 co-relation queries the response was YES. [2024-06-20 15:48:29,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48942 conditions, 5409 events. 3323/5409 cut-off events. For 646350/646354 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33506 event pairs, 698 based on Foata normal form. 4/5412 useless extension candidates. Maximal degree in co-relation 48810. Up to 4938 conditions per place. [2024-06-20 15:48:29,095 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 380 selfloop transitions, 39 changer transitions 0/424 dead transitions. [2024-06-20 15:48:29,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 424 transitions, 5590 flow [2024-06-20 15:48:29,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:48:29,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 15:48:29,096 INFO L175 Difference]: Start difference. First operand has 275 places, 399 transitions, 4602 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:48:29,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 424 transitions, 5590 flow [2024-06-20 15:48:30,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 424 transitions, 5343 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-20 15:48:30,055 INFO L231 Difference]: Finished difference. Result has 277 places, 403 transitions, 4530 flow [2024-06-20 15:48:30,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4355, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4530, PETRI_PLACES=277, PETRI_TRANSITIONS=403} [2024-06-20 15:48:30,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-20 15:48:30,056 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 403 transitions, 4530 flow [2024-06-20 15:48:30,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:30,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:30,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:30,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:48:30,056 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)] === [2024-06-20 15:48:30,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:30,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1416704594, now seen corresponding path program 3 times [2024-06-20 15:48:30,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:30,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789770257] [2024-06-20 15:48:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:30,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:30,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:30,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789770257] [2024-06-20 15:48:30,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789770257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:30,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:30,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:30,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803188211] [2024-06-20 15:48:30,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:30,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:30,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:30,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:30,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:30,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:30,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 403 transitions, 4530 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:30,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:30,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:30,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:32,029 INFO L124 PetriNetUnfolderBase]: 3375/5497 cut-off events. [2024-06-20 15:48:32,029 INFO L125 PetriNetUnfolderBase]: For 681876/681880 co-relation queries the response was YES. [2024-06-20 15:48:32,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50057 conditions, 5497 events. 3375/5497 cut-off events. For 681876/681880 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 34114 event pairs, 726 based on Foata normal form. 4/5500 useless extension candidates. Maximal degree in co-relation 49924. Up to 4725 conditions per place. [2024-06-20 15:48:32,107 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 342 selfloop transitions, 84 changer transitions 0/431 dead transitions. [2024-06-20 15:48:32,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 431 transitions, 5898 flow [2024-06-20 15:48:32,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 15:48:32,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 15:48:32,108 INFO L175 Difference]: Start difference. First operand has 277 places, 403 transitions, 4530 flow. Second operand 8 states and 152 transitions. [2024-06-20 15:48:32,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 431 transitions, 5898 flow [2024-06-20 15:48:33,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 431 transitions, 5773 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 15:48:33,013 INFO L231 Difference]: Finished difference. Result has 279 places, 410 transitions, 4792 flow [2024-06-20 15:48:33,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4405, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4792, PETRI_PLACES=279, PETRI_TRANSITIONS=410} [2024-06-20 15:48:33,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-20 15:48:33,014 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 410 transitions, 4792 flow [2024-06-20 15:48:33,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:33,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:33,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:33,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:48:33,014 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)] === [2024-06-20 15:48:33,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:33,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1416704377, now seen corresponding path program 2 times [2024-06-20 15:48:33,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:33,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467215964] [2024-06-20 15:48:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:33,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:33,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:33,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467215964] [2024-06-20 15:48:33,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467215964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:33,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:33,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:33,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984008735] [2024-06-20 15:48:33,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:33,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:33,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:33,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:33,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:33,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:33,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 410 transitions, 4792 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:33,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:33,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:33,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:35,084 INFO L124 PetriNetUnfolderBase]: 3385/5509 cut-off events. [2024-06-20 15:48:35,084 INFO L125 PetriNetUnfolderBase]: For 697246/697250 co-relation queries the response was YES. [2024-06-20 15:48:35,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51109 conditions, 5509 events. 3385/5509 cut-off events. For 697246/697250 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34234 event pairs, 702 based on Foata normal form. 4/5512 useless extension candidates. Maximal degree in co-relation 50975. Up to 4986 conditions per place. [2024-06-20 15:48:35,159 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 378 selfloop transitions, 48 changer transitions 0/431 dead transitions. [2024-06-20 15:48:35,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 431 transitions, 5786 flow [2024-06-20 15:48:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:35,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 15:48:35,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 15:48:35,160 INFO L175 Difference]: Start difference. First operand has 279 places, 410 transitions, 4792 flow. Second operand 8 states and 146 transitions. [2024-06-20 15:48:35,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 431 transitions, 5786 flow [2024-06-20 15:48:36,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 431 transitions, 5605 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-20 15:48:36,381 INFO L231 Difference]: Finished difference. Result has 283 places, 414 transitions, 4812 flow [2024-06-20 15:48:36,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4611, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4812, PETRI_PLACES=283, PETRI_TRANSITIONS=414} [2024-06-20 15:48:36,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-20 15:48:36,382 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 414 transitions, 4812 flow [2024-06-20 15:48:36,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:36,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:36,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:36,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:48:36,382 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)] === [2024-06-20 15:48:36,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1416437467, now seen corresponding path program 3 times [2024-06-20 15:48:36,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:36,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651910189] [2024-06-20 15:48:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:36,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:37,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:37,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651910189] [2024-06-20 15:48:37,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651910189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:37,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:37,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:37,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624397139] [2024-06-20 15:48:37,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:37,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:37,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:37,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:37,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:37,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:37,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 414 transitions, 4812 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:37,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:37,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:37,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:38,682 INFO L124 PetriNetUnfolderBase]: 3387/5514 cut-off events. [2024-06-20 15:48:38,682 INFO L125 PetriNetUnfolderBase]: For 705527/705531 co-relation queries the response was YES. [2024-06-20 15:48:38,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51153 conditions, 5514 events. 3387/5514 cut-off events. For 705527/705531 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 34223 event pairs, 702 based on Foata normal form. 4/5517 useless extension candidates. Maximal degree in co-relation 51017. Up to 4941 conditions per place. [2024-06-20 15:48:38,749 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 364 selfloop transitions, 66 changer transitions 0/435 dead transitions. [2024-06-20 15:48:38,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 435 transitions, 5980 flow [2024-06-20 15:48:38,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:38,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:48:38,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 15:48:38,751 INFO L175 Difference]: Start difference. First operand has 283 places, 414 transitions, 4812 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:48:38,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 435 transitions, 5980 flow [2024-06-20 15:48:39,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 435 transitions, 5829 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 15:48:39,812 INFO L231 Difference]: Finished difference. Result has 285 places, 417 transitions, 4885 flow [2024-06-20 15:48:39,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4661, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4885, PETRI_PLACES=285, PETRI_TRANSITIONS=417} [2024-06-20 15:48:39,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-20 15:48:39,812 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 417 transitions, 4885 flow [2024-06-20 15:48:39,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:39,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:39,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:39,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:48:39,813 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)] === [2024-06-20 15:48:39,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:39,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1416428012, now seen corresponding path program 2 times [2024-06-20 15:48:39,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:39,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374148894] [2024-06-20 15:48:39,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:39,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:40,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:40,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374148894] [2024-06-20 15:48:40,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374148894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:40,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:40,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:48:40,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465002075] [2024-06-20 15:48:40,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:40,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:48:40,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:40,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:48:40,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:48:40,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:40,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 417 transitions, 4885 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:48:40,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:40,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:40,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:42,082 INFO L124 PetriNetUnfolderBase]: 3459/5630 cut-off events. [2024-06-20 15:48:42,082 INFO L125 PetriNetUnfolderBase]: For 760241/760245 co-relation queries the response was YES. [2024-06-20 15:48:42,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53138 conditions, 5630 events. 3459/5630 cut-off events. For 760241/760245 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 35169 event pairs, 705 based on Foata normal form. 6/5635 useless extension candidates. Maximal degree in co-relation 53001. Up to 4945 conditions per place. [2024-06-20 15:48:42,155 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 370 selfloop transitions, 73 changer transitions 0/448 dead transitions. [2024-06-20 15:48:42,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 448 transitions, 6507 flow [2024-06-20 15:48:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:48:42,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:48:42,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 15:48:42,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 15:48:42,156 INFO L175 Difference]: Start difference. First operand has 285 places, 417 transitions, 4885 flow. Second operand 9 states and 167 transitions. [2024-06-20 15:48:42,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 448 transitions, 6507 flow [2024-06-20 15:48:43,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 448 transitions, 6344 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 15:48:43,204 INFO L231 Difference]: Finished difference. Result has 290 places, 425 transitions, 5145 flow [2024-06-20 15:48:43,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5145, PETRI_PLACES=290, PETRI_TRANSITIONS=425} [2024-06-20 15:48:43,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-20 15:48:43,205 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 425 transitions, 5145 flow [2024-06-20 15:48:43,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:48:43,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:43,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:43,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:48:43,205 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)] === [2024-06-20 15:48:43,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:43,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1416815822, now seen corresponding path program 3 times [2024-06-20 15:48:43,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:43,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253418675] [2024-06-20 15:48:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:43,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:44,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:44,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253418675] [2024-06-20 15:48:44,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253418675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:44,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:44,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:48:44,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723237944] [2024-06-20 15:48:44,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:44,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:48:44,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:44,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:48:44,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:48:44,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:44,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 425 transitions, 5145 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:48:44,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:44,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:44,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:45,586 INFO L124 PetriNetUnfolderBase]: 3469/5642 cut-off events. [2024-06-20 15:48:45,586 INFO L125 PetriNetUnfolderBase]: For 775484/775488 co-relation queries the response was YES. [2024-06-20 15:48:45,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54084 conditions, 5642 events. 3469/5642 cut-off events. For 775484/775488 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 35238 event pairs, 716 based on Foata normal form. 4/5645 useless extension candidates. Maximal degree in co-relation 53945. Up to 5097 conditions per place. [2024-06-20 15:48:45,666 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 389 selfloop transitions, 53 changer transitions 0/447 dead transitions. [2024-06-20 15:48:45,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 447 transitions, 6217 flow [2024-06-20 15:48:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:48:45,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:48:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 15:48:45,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 15:48:45,667 INFO L175 Difference]: Start difference. First operand has 290 places, 425 transitions, 5145 flow. Second operand 9 states and 161 transitions. [2024-06-20 15:48:45,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 447 transitions, 6217 flow [2024-06-20 15:48:46,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 447 transitions, 5974 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-20 15:48:46,600 INFO L231 Difference]: Finished difference. Result has 294 places, 429 transitions, 5157 flow [2024-06-20 15:48:46,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4922, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5157, PETRI_PLACES=294, PETRI_TRANSITIONS=429} [2024-06-20 15:48:46,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-20 15:48:46,600 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 429 transitions, 5157 flow [2024-06-20 15:48:46,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:48:46,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:46,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:46,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:48:46,601 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)] === [2024-06-20 15:48:46,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:46,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1416441032, now seen corresponding path program 4 times [2024-06-20 15:48:46,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:46,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405564080] [2024-06-20 15:48:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:46,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:47,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:47,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405564080] [2024-06-20 15:48:47,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405564080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:47,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:47,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:48:47,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546060330] [2024-06-20 15:48:47,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:47,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:48:47,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:47,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:48:47,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:48:47,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:47,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 429 transitions, 5157 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:48:47,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:47,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:47,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:48,959 INFO L124 PetriNetUnfolderBase]: 3473/5648 cut-off events. [2024-06-20 15:48:48,959 INFO L125 PetriNetUnfolderBase]: For 782069/782073 co-relation queries the response was YES. [2024-06-20 15:48:49,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54074 conditions, 5648 events. 3473/5648 cut-off events. For 782069/782073 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 35239 event pairs, 709 based on Foata normal form. 4/5651 useless extension candidates. Maximal degree in co-relation 53933. Up to 5003 conditions per place. [2024-06-20 15:48:49,040 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 378 selfloop transitions, 79 changer transitions 0/462 dead transitions. [2024-06-20 15:48:49,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 462 transitions, 6589 flow [2024-06-20 15:48:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:48:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:48:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 15:48:49,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 15:48:49,041 INFO L175 Difference]: Start difference. First operand has 294 places, 429 transitions, 5157 flow. Second operand 9 states and 165 transitions. [2024-06-20 15:48:49,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 462 transitions, 6589 flow [2024-06-20 15:48:50,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 462 transitions, 6388 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-20 15:48:50,351 INFO L231 Difference]: Finished difference. Result has 298 places, 442 transitions, 5465 flow [2024-06-20 15:48:50,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4956, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5465, PETRI_PLACES=298, PETRI_TRANSITIONS=442} [2024-06-20 15:48:50,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-20 15:48:50,352 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 442 transitions, 5465 flow [2024-06-20 15:48:50,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:48:50,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:50,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:50,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:48:50,352 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)] === [2024-06-20 15:48:50,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:50,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1966668622, now seen corresponding path program 4 times [2024-06-20 15:48:50,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:50,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255589401] [2024-06-20 15:48:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:50,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:51,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:51,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255589401] [2024-06-20 15:48:51,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255589401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:51,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:51,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:51,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914344158] [2024-06-20 15:48:51,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:51,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:51,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:51,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:51,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:51,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:51,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 442 transitions, 5465 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:51,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:51,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:51,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:52,587 INFO L124 PetriNetUnfolderBase]: 3476/5653 cut-off events. [2024-06-20 15:48:52,587 INFO L125 PetriNetUnfolderBase]: For 800097/800101 co-relation queries the response was YES. [2024-06-20 15:48:52,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54412 conditions, 5653 events. 3476/5653 cut-off events. For 800097/800101 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 35259 event pairs, 732 based on Foata normal form. 6/5653 useless extension candidates. Maximal degree in co-relation 54268. Up to 5074 conditions per place. [2024-06-20 15:48:52,667 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 388 selfloop transitions, 65 changer transitions 0/458 dead transitions. [2024-06-20 15:48:52,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 458 transitions, 6543 flow [2024-06-20 15:48:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:52,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 15:48:52,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 15:48:52,668 INFO L175 Difference]: Start difference. First operand has 298 places, 442 transitions, 5465 flow. Second operand 8 states and 143 transitions. [2024-06-20 15:48:52,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 458 transitions, 6543 flow [2024-06-20 15:48:53,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 458 transitions, 6357 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-20 15:48:53,960 INFO L231 Difference]: Finished difference. Result has 302 places, 445 transitions, 5555 flow [2024-06-20 15:48:53,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5279, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5555, PETRI_PLACES=302, PETRI_TRANSITIONS=445} [2024-06-20 15:48:53,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-20 15:48:53,961 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 445 transitions, 5555 flow [2024-06-20 15:48:53,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:53,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:53,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:53,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:48:53,962 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)] === [2024-06-20 15:48:53,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:53,962 INFO L85 PathProgramCache]: Analyzing trace with hash 902151126, now seen corresponding path program 4 times [2024-06-20 15:48:53,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:53,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523657632] [2024-06-20 15:48:53,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:53,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:54,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:54,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523657632] [2024-06-20 15:48:54,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523657632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:54,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:54,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:54,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755637923] [2024-06-20 15:48:54,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:54,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:54,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:54,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:54,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:54,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:54,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 445 transitions, 5555 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:54,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:54,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:54,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:56,226 INFO L124 PetriNetUnfolderBase]: 3486/5650 cut-off events. [2024-06-20 15:48:56,226 INFO L125 PetriNetUnfolderBase]: For 809852/809854 co-relation queries the response was YES. [2024-06-20 15:48:56,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54978 conditions, 5650 events. 3486/5650 cut-off events. For 809852/809854 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 35084 event pairs, 721 based on Foata normal form. 2/5646 useless extension candidates. Maximal degree in co-relation 54832. Up to 5031 conditions per place. [2024-06-20 15:48:56,297 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 395 selfloop transitions, 71 changer transitions 0/471 dead transitions. [2024-06-20 15:48:56,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 471 transitions, 6695 flow [2024-06-20 15:48:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:56,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:56,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 15:48:56,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 15:48:56,298 INFO L175 Difference]: Start difference. First operand has 302 places, 445 transitions, 5555 flow. Second operand 8 states and 151 transitions. [2024-06-20 15:48:56,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 471 transitions, 6695 flow [2024-06-20 15:48:57,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 471 transitions, 6429 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-20 15:48:57,828 INFO L231 Difference]: Finished difference. Result has 304 places, 448 transitions, 5554 flow [2024-06-20 15:48:57,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5289, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5554, PETRI_PLACES=304, PETRI_TRANSITIONS=448} [2024-06-20 15:48:57,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-20 15:48:57,829 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 448 transitions, 5554 flow [2024-06-20 15:48:57,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:57,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:57,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:57,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:48:57,829 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)] === [2024-06-20 15:48:57,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:57,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1457718900, now seen corresponding path program 5 times [2024-06-20 15:48:57,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:57,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059164315] [2024-06-20 15:48:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:57,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:58,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:58,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059164315] [2024-06-20 15:48:58,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059164315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:58,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:58,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:58,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874546803] [2024-06-20 15:48:58,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:58,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:58,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:58,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:58,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:58,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:48:58,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 448 transitions, 5554 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:58,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:58,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:48:58,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:00,001 INFO L124 PetriNetUnfolderBase]: 3496/5671 cut-off events. [2024-06-20 15:49:00,001 INFO L125 PetriNetUnfolderBase]: For 824745/824747 co-relation queries the response was YES. [2024-06-20 15:49:00,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55293 conditions, 5671 events. 3496/5671 cut-off events. For 824745/824747 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 35395 event pairs, 727 based on Foata normal form. 2/5667 useless extension candidates. Maximal degree in co-relation 55146. Up to 5023 conditions per place. [2024-06-20 15:49:00,084 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 392 selfloop transitions, 79 changer transitions 0/476 dead transitions. [2024-06-20 15:49:00,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 476 transitions, 7024 flow [2024-06-20 15:49:00,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 15:49:00,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 15:49:00,085 INFO L175 Difference]: Start difference. First operand has 304 places, 448 transitions, 5554 flow. Second operand 8 states and 151 transitions. [2024-06-20 15:49:00,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 476 transitions, 7024 flow [2024-06-20 15:49:01,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 476 transitions, 6841 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-20 15:49:01,693 INFO L231 Difference]: Finished difference. Result has 308 places, 454 transitions, 5773 flow [2024-06-20 15:49:01,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5371, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5773, PETRI_PLACES=308, PETRI_TRANSITIONS=454} [2024-06-20 15:49:01,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-20 15:49:01,694 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 454 transitions, 5773 flow [2024-06-20 15:49:01,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:01,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:01,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:01,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:49:01,694 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)] === [2024-06-20 15:49:01,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:01,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1728259651, now seen corresponding path program 4 times [2024-06-20 15:49:01,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:01,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48271525] [2024-06-20 15:49:01,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:01,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:02,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:02,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48271525] [2024-06-20 15:49:02,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48271525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:02,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:02,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:02,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643541748] [2024-06-20 15:49:02,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:02,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:02,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:02,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:02,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:02,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:49:02,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 454 transitions, 5773 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:02,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:02,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:49:02,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:04,075 INFO L124 PetriNetUnfolderBase]: 3489/5669 cut-off events. [2024-06-20 15:49:04,075 INFO L125 PetriNetUnfolderBase]: For 832801/832803 co-relation queries the response was YES. [2024-06-20 15:49:04,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55291 conditions, 5669 events. 3489/5669 cut-off events. For 832801/832803 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35371 event pairs, 716 based on Foata normal form. 1/5664 useless extension candidates. Maximal degree in co-relation 55142. Up to 5182 conditions per place. [2024-06-20 15:49:04,159 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 430 selfloop transitions, 38 changer transitions 0/473 dead transitions. [2024-06-20 15:49:04,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 473 transitions, 6773 flow [2024-06-20 15:49:04,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 15:49:04,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 15:49:04,160 INFO L175 Difference]: Start difference. First operand has 308 places, 454 transitions, 5773 flow. Second operand 8 states and 144 transitions. [2024-06-20 15:49:04,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 473 transitions, 6773 flow [2024-06-20 15:49:06,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 473 transitions, 6547 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-20 15:49:06,372 INFO L231 Difference]: Finished difference. Result has 312 places, 454 transitions, 5629 flow [2024-06-20 15:49:06,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5547, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5629, PETRI_PLACES=312, PETRI_TRANSITIONS=454} [2024-06-20 15:49:06,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-20 15:49:06,373 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 454 transitions, 5629 flow [2024-06-20 15:49:06,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:06,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:06,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:06,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:49:06,374 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)] === [2024-06-20 15:49:06,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:06,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1324059562, now seen corresponding path program 6 times [2024-06-20 15:49:06,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:06,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491752882] [2024-06-20 15:49:06,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:06,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:07,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:07,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491752882] [2024-06-20 15:49:07,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491752882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:07,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:07,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:07,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494863022] [2024-06-20 15:49:07,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:07,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:07,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:07,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:07,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:07,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:49:07,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 454 transitions, 5629 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:07,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:07,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:49:07,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:08,453 INFO L124 PetriNetUnfolderBase]: 3483/5640 cut-off events. [2024-06-20 15:49:08,453 INFO L125 PetriNetUnfolderBase]: For 840550/840552 co-relation queries the response was YES. [2024-06-20 15:49:08,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54986 conditions, 5640 events. 3483/5640 cut-off events. For 840550/840552 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 35074 event pairs, 712 based on Foata normal form. 2/5636 useless extension candidates. Maximal degree in co-relation 54835. Up to 5027 conditions per place. [2024-06-20 15:49:08,535 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 400 selfloop transitions, 73 changer transitions 0/478 dead transitions. [2024-06-20 15:49:08,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 478 transitions, 6677 flow [2024-06-20 15:49:08,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 15:49:08,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 15:49:08,536 INFO L175 Difference]: Start difference. First operand has 312 places, 454 transitions, 5629 flow. Second operand 8 states and 151 transitions. [2024-06-20 15:49:08,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 478 transitions, 6677 flow [2024-06-20 15:49:10,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 478 transitions, 6444 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-20 15:49:10,599 INFO L231 Difference]: Finished difference. Result has 312 places, 454 transitions, 5549 flow [2024-06-20 15:49:10,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5396, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5549, PETRI_PLACES=312, PETRI_TRANSITIONS=454} [2024-06-20 15:49:10,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-20 15:49:10,600 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 454 transitions, 5549 flow [2024-06-20 15:49:10,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:10,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:10,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:10,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:49:10,600 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)] === [2024-06-20 15:49:10,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:10,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1336439722, now seen corresponding path program 7 times [2024-06-20 15:49:10,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:10,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448450533] [2024-06-20 15:49:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:10,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:11,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:11,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448450533] [2024-06-20 15:49:11,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448450533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:11,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:11,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:11,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511076016] [2024-06-20 15:49:11,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:11,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:11,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:11,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:11,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:11,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:49:11,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 454 transitions, 5549 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:11,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:11,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:49:11,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:12,716 INFO L124 PetriNetUnfolderBase]: 3493/5654 cut-off events. [2024-06-20 15:49:12,717 INFO L125 PetriNetUnfolderBase]: For 857815/857817 co-relation queries the response was YES. [2024-06-20 15:49:12,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55398 conditions, 5654 events. 3493/5654 cut-off events. For 857815/857817 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35219 event pairs, 711 based on Foata normal form. 2/5650 useless extension candidates. Maximal degree in co-relation 55246. Up to 4999 conditions per place. [2024-06-20 15:49:12,797 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 389 selfloop transitions, 85 changer transitions 0/479 dead transitions. [2024-06-20 15:49:12,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 479 transitions, 6727 flow [2024-06-20 15:49:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 15:49:12,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 15:49:12,798 INFO L175 Difference]: Start difference. First operand has 312 places, 454 transitions, 5549 flow. Second operand 8 states and 151 transitions. [2024-06-20 15:49:12,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 479 transitions, 6727 flow [2024-06-20 15:49:15,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 479 transitions, 6522 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-20 15:49:15,146 INFO L231 Difference]: Finished difference. Result has 311 places, 457 transitions, 5644 flow [2024-06-20 15:49:15,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5344, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5644, PETRI_PLACES=311, PETRI_TRANSITIONS=457} [2024-06-20 15:49:15,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-20 15:49:15,146 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 457 transitions, 5644 flow [2024-06-20 15:49:15,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:15,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:15,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:15,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:49:15,147 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)] === [2024-06-20 15:49:15,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:15,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1480538789, now seen corresponding path program 5 times [2024-06-20 15:49:15,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:15,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915658962] [2024-06-20 15:49:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:15,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:16,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:16,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915658962] [2024-06-20 15:49:16,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915658962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:16,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:16,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:16,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711902239] [2024-06-20 15:49:16,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:16,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:16,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:16,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:16,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:16,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:49:16,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 457 transitions, 5644 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:16,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:16,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:49:16,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:17,434 INFO L124 PetriNetUnfolderBase]: 3506/5684 cut-off events. [2024-06-20 15:49:17,434 INFO L125 PetriNetUnfolderBase]: For 876903/876905 co-relation queries the response was YES. [2024-06-20 15:49:17,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56217 conditions, 5684 events. 3506/5684 cut-off events. For 876903/876905 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35435 event pairs, 705 based on Foata normal form. 1/5679 useless extension candidates. Maximal degree in co-relation 56064. Up to 5170 conditions per place. [2024-06-20 15:49:17,517 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 417 selfloop transitions, 59 changer transitions 0/481 dead transitions. [2024-06-20 15:49:17,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 481 transitions, 6993 flow [2024-06-20 15:49:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:17,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 15:49:17,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 15:49:17,518 INFO L175 Difference]: Start difference. First operand has 311 places, 457 transitions, 5644 flow. Second operand 8 states and 146 transitions. [2024-06-20 15:49:17,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 481 transitions, 6993 flow [2024-06-20 15:49:19,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 481 transitions, 6723 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-20 15:49:19,248 INFO L231 Difference]: Finished difference. Result has 314 places, 464 transitions, 5678 flow [2024-06-20 15:49:19,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5374, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5678, PETRI_PLACES=314, PETRI_TRANSITIONS=464} [2024-06-20 15:49:19,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-20 15:49:19,249 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 464 transitions, 5678 flow [2024-06-20 15:49:19,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:19,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:19,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:19,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:49:19,249 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)] === [2024-06-20 15:49:19,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:19,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1480093319, now seen corresponding path program 6 times [2024-06-20 15:49:19,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:19,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732104664] [2024-06-20 15:49:19,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:19,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:20,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:20,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732104664] [2024-06-20 15:49:20,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732104664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:20,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:20,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:20,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704250620] [2024-06-20 15:49:20,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:20,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:20,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:20,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:20,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:20,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:49:20,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 464 transitions, 5678 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:20,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:20,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:49:20,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:21,601 INFO L124 PetriNetUnfolderBase]: 3503/5680 cut-off events. [2024-06-20 15:49:21,601 INFO L125 PetriNetUnfolderBase]: For 887685/887687 co-relation queries the response was YES. [2024-06-20 15:49:21,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55948 conditions, 5680 events. 3503/5680 cut-off events. For 887685/887687 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35400 event pairs, 705 based on Foata normal form. 1/5675 useless extension candidates. Maximal degree in co-relation 55793. Up to 5182 conditions per place. [2024-06-20 15:49:21,690 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 428 selfloop transitions, 47 changer transitions 0/480 dead transitions. [2024-06-20 15:49:21,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 480 transitions, 6680 flow [2024-06-20 15:49:21,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 15:49:21,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 15:49:21,691 INFO L175 Difference]: Start difference. First operand has 314 places, 464 transitions, 5678 flow. Second operand 8 states and 143 transitions. [2024-06-20 15:49:21,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 480 transitions, 6680 flow [2024-06-20 15:49:23,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 480 transitions, 6483 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-20 15:49:23,879 INFO L231 Difference]: Finished difference. Result has 317 places, 464 transitions, 5581 flow [2024-06-20 15:49:23,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5481, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5581, PETRI_PLACES=317, PETRI_TRANSITIONS=464} [2024-06-20 15:49:23,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-20 15:49:23,880 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 464 transitions, 5581 flow [2024-06-20 15:49:23,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:23,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:23,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:23,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:49:23,881 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)] === [2024-06-20 15:49:23,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:23,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1246828674, now seen corresponding path program 8 times [2024-06-20 15:49:23,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:23,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711573260] [2024-06-20 15:49:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:23,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:24,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:24,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711573260] [2024-06-20 15:49:24,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711573260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:24,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:24,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:24,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375665090] [2024-06-20 15:49:24,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:24,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:24,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:24,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:24,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:24,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:49:24,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 464 transitions, 5581 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:24,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:24,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:49:24,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:26,055 INFO L124 PetriNetUnfolderBase]: 3529/5706 cut-off events. [2024-06-20 15:49:26,055 INFO L125 PetriNetUnfolderBase]: For 924705/924707 co-relation queries the response was YES. [2024-06-20 15:49:26,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56839 conditions, 5706 events. 3529/5706 cut-off events. For 924705/924707 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 35464 event pairs, 719 based on Foata normal form. 2/5702 useless extension candidates. Maximal degree in co-relation 56683. Up to 4983 conditions per place. [2024-06-20 15:49:26,142 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 377 selfloop transitions, 108 changer transitions 0/490 dead transitions. [2024-06-20 15:49:26,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 490 transitions, 7117 flow [2024-06-20 15:49:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:26,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:26,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 15:49:26,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 15:49:26,144 INFO L175 Difference]: Start difference. First operand has 317 places, 464 transitions, 5581 flow. Second operand 8 states and 152 transitions. [2024-06-20 15:49:26,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 490 transitions, 7117 flow [2024-06-20 15:49:27,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 490 transitions, 7025 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:49:28,000 INFO L231 Difference]: Finished difference. Result has 319 places, 470 transitions, 5965 flow [2024-06-20 15:49:28,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5489, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5965, PETRI_PLACES=319, PETRI_TRANSITIONS=470} [2024-06-20 15:49:28,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-20 15:49:28,001 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 470 transitions, 5965 flow [2024-06-20 15:49:28,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:28,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:28,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:28,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:49:28,001 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)] === [2024-06-20 15:49:28,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:28,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2112044394, now seen corresponding path program 9 times [2024-06-20 15:49:28,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:28,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752125909] [2024-06-20 15:49:28,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:28,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:28,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:28,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752125909] [2024-06-20 15:49:28,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752125909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:28,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:28,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:28,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606197067] [2024-06-20 15:49:28,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:28,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:28,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:28,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:28,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:28,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:49:28,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 470 transitions, 5965 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:28,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:28,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:49:28,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:30,167 INFO L124 PetriNetUnfolderBase]: 3523/5712 cut-off events. [2024-06-20 15:49:30,167 INFO L125 PetriNetUnfolderBase]: For 935894/935896 co-relation queries the response was YES. [2024-06-20 15:49:30,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57331 conditions, 5712 events. 3523/5712 cut-off events. For 935894/935896 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 35735 event pairs, 725 based on Foata normal form. 2/5708 useless extension candidates. Maximal degree in co-relation 57174. Up to 4978 conditions per place. [2024-06-20 15:49:30,252 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 377 selfloop transitions, 107 changer transitions 0/489 dead transitions. [2024-06-20 15:49:30,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 489 transitions, 7051 flow [2024-06-20 15:49:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:30,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 15:49:30,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-20 15:49:30,254 INFO L175 Difference]: Start difference. First operand has 319 places, 470 transitions, 5965 flow. Second operand 8 states and 150 transitions. [2024-06-20 15:49:30,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 489 transitions, 7051 flow [2024-06-20 15:49:32,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 489 transitions, 6728 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-20 15:49:32,641 INFO L231 Difference]: Finished difference. Result has 323 places, 470 transitions, 5862 flow [2024-06-20 15:49:32,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5642, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5862, PETRI_PLACES=323, PETRI_TRANSITIONS=470} [2024-06-20 15:49:32,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-20 15:49:32,642 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 470 transitions, 5862 flow [2024-06-20 15:49:32,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:32,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:32,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:32,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:49:32,642 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)] === [2024-06-20 15:49:32,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:32,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1788968283, now seen corresponding path program 7 times [2024-06-20 15:49:32,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:32,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923941804] [2024-06-20 15:49:32,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:32,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:33,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:33,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923941804] [2024-06-20 15:49:33,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923941804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:33,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:33,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:33,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069956537] [2024-06-20 15:49:33,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:33,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:33,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:33,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:33,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:33,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:49:33,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 470 transitions, 5862 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:33,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:33,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:49:33,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:34,941 INFO L124 PetriNetUnfolderBase]: 3544/5739 cut-off events. [2024-06-20 15:49:34,942 INFO L125 PetriNetUnfolderBase]: For 956242/956246 co-relation queries the response was YES. [2024-06-20 15:49:35,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58001 conditions, 5739 events. 3544/5739 cut-off events. For 956242/956246 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35724 event pairs, 725 based on Foata normal form. 3/5736 useless extension candidates. Maximal degree in co-relation 57842. Up to 5159 conditions per place. [2024-06-20 15:49:35,032 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 409 selfloop transitions, 77 changer transitions 0/491 dead transitions. [2024-06-20 15:49:35,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 491 transitions, 7251 flow [2024-06-20 15:49:35,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:35,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 15:49:35,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 15:49:35,034 INFO L175 Difference]: Start difference. First operand has 323 places, 470 transitions, 5862 flow. Second operand 8 states and 144 transitions. [2024-06-20 15:49:35,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 491 transitions, 7251 flow [2024-06-20 15:49:37,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 491 transitions, 7008 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 15:49:37,427 INFO L231 Difference]: Finished difference. Result has 325 places, 478 transitions, 5987 flow [2024-06-20 15:49:37,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5987, PETRI_PLACES=325, PETRI_TRANSITIONS=478} [2024-06-20 15:49:37,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-20 15:49:37,428 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 478 transitions, 5987 flow [2024-06-20 15:49:37,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:37,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:37,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:37,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:49:37,429 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)] === [2024-06-20 15:49:37,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:37,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1762417750, now seen corresponding path program 10 times [2024-06-20 15:49:37,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:37,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063012595] [2024-06-20 15:49:37,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:37,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:38,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:38,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063012595] [2024-06-20 15:49:38,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063012595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:38,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:38,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:38,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974616401] [2024-06-20 15:49:38,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:38,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:38,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:38,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:38,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:38,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:49:38,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 478 transitions, 5987 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:38,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:38,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:49:38,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:39,518 INFO L124 PetriNetUnfolderBase]: 3586/5811 cut-off events. [2024-06-20 15:49:39,518 INFO L125 PetriNetUnfolderBase]: For 1001659/1001663 co-relation queries the response was YES. [2024-06-20 15:49:39,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59387 conditions, 5811 events. 3586/5811 cut-off events. For 1001659/1001663 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 36304 event pairs, 782 based on Foata normal form. 2/5807 useless extension candidates. Maximal degree in co-relation 59226. Up to 4876 conditions per place. [2024-06-20 15:49:39,604 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 372 selfloop transitions, 128 changer transitions 0/505 dead transitions. [2024-06-20 15:49:39,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 505 transitions, 7883 flow [2024-06-20 15:49:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 15:49:39,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-20 15:49:39,605 INFO L175 Difference]: Start difference. First operand has 325 places, 478 transitions, 5987 flow. Second operand 8 states and 150 transitions. [2024-06-20 15:49:39,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 505 transitions, 7883 flow [2024-06-20 15:49:41,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 505 transitions, 7682 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 15:49:41,627 INFO L231 Difference]: Finished difference. Result has 328 places, 488 transitions, 6438 flow [2024-06-20 15:49:41,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5786, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6438, PETRI_PLACES=328, PETRI_TRANSITIONS=488} [2024-06-20 15:49:41,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-20 15:49:41,628 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 488 transitions, 6438 flow [2024-06-20 15:49:41,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:41,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:41,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:41,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:49:41,628 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)] === [2024-06-20 15:49:41,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:41,629 INFO L85 PathProgramCache]: Analyzing trace with hash 639728285, now seen corresponding path program 8 times [2024-06-20 15:49:41,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:41,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790548587] [2024-06-20 15:49:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:41,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:42,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:42,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790548587] [2024-06-20 15:49:42,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790548587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:42,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:42,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:42,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130830408] [2024-06-20 15:49:42,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:42,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:42,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:42,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:42,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:49:42,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 488 transitions, 6438 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:42,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:42,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:49:42,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:43,982 INFO L124 PetriNetUnfolderBase]: 3588/5820 cut-off events. [2024-06-20 15:49:43,983 INFO L125 PetriNetUnfolderBase]: For 1022736/1022740 co-relation queries the response was YES. [2024-06-20 15:49:44,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60266 conditions, 5820 events. 3588/5820 cut-off events. For 1022736/1022740 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36459 event pairs, 741 based on Foata normal form. 4/5818 useless extension candidates. Maximal degree in co-relation 60104. Up to 5102 conditions per place. [2024-06-20 15:49:44,069 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 383 selfloop transitions, 117 changer transitions 0/505 dead transitions. [2024-06-20 15:49:44,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 505 transitions, 7962 flow [2024-06-20 15:49:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:44,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:44,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 15:49:44,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 15:49:44,070 INFO L175 Difference]: Start difference. First operand has 328 places, 488 transitions, 6438 flow. Second operand 8 states and 147 transitions. [2024-06-20 15:49:44,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 505 transitions, 7962 flow [2024-06-20 15:49:46,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 505 transitions, 7667 flow, removed 90 selfloop flow, removed 5 redundant places. [2024-06-20 15:49:46,066 INFO L231 Difference]: Finished difference. Result has 331 places, 491 transitions, 6459 flow [2024-06-20 15:49:46,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6143, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6459, PETRI_PLACES=331, PETRI_TRANSITIONS=491} [2024-06-20 15:49:46,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-20 15:49:46,067 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 491 transitions, 6459 flow [2024-06-20 15:49:46,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:46,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:46,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:46,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:49:46,067 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)] === [2024-06-20 15:49:46,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:46,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1762654683, now seen corresponding path program 9 times [2024-06-20 15:49:46,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:46,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247469598] [2024-06-20 15:49:46,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:46,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:46,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:46,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247469598] [2024-06-20 15:49:46,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247469598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:46,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:46,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:46,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273259265] [2024-06-20 15:49:46,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:46,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:46,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:46,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:46,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:47,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:49:47,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 491 transitions, 6459 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:47,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:47,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:49:47,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:48,352 INFO L124 PetriNetUnfolderBase]: 3593/5817 cut-off events. [2024-06-20 15:49:48,353 INFO L125 PetriNetUnfolderBase]: For 1014101/1014105 co-relation queries the response was YES. [2024-06-20 15:49:48,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59396 conditions, 5817 events. 3593/5817 cut-off events. For 1014101/1014105 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36314 event pairs, 736 based on Foata normal form. 3/5814 useless extension candidates. Maximal degree in co-relation 59234. Up to 5246 conditions per place. [2024-06-20 15:49:48,440 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 434 selfloop transitions, 67 changer transitions 0/506 dead transitions. [2024-06-20 15:49:48,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 506 transitions, 7573 flow [2024-06-20 15:49:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 15:49:48,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 15:49:48,441 INFO L175 Difference]: Start difference. First operand has 331 places, 491 transitions, 6459 flow. Second operand 8 states and 141 transitions. [2024-06-20 15:49:48,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 506 transitions, 7573 flow [2024-06-20 15:49:50,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 506 transitions, 7298 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 15:49:50,712 INFO L231 Difference]: Finished difference. Result has 334 places, 494 transitions, 6406 flow [2024-06-20 15:49:50,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6188, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6406, PETRI_PLACES=334, PETRI_TRANSITIONS=494} [2024-06-20 15:49:50,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-20 15:49:50,713 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 494 transitions, 6406 flow [2024-06-20 15:49:50,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:50,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:50,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:50,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:49:50,714 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)] === [2024-06-20 15:49:50,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:50,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1762654900, now seen corresponding path program 11 times [2024-06-20 15:49:50,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:50,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469610895] [2024-06-20 15:49:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:50,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:51,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:51,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469610895] [2024-06-20 15:49:51,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469610895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:51,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:51,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:51,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77666256] [2024-06-20 15:49:51,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:51,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:51,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:51,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:51,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:51,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:49:51,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 494 transitions, 6406 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:51,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:51,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:49:51,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:53,060 INFO L124 PetriNetUnfolderBase]: 3603/5837 cut-off events. [2024-06-20 15:49:53,060 INFO L125 PetriNetUnfolderBase]: For 1037811/1037815 co-relation queries the response was YES. [2024-06-20 15:49:53,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59575 conditions, 5837 events. 3603/5837 cut-off events. For 1037811/1037815 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 36429 event pairs, 782 based on Foata normal form. 2/5833 useless extension candidates. Maximal degree in co-relation 59412. Up to 4892 conditions per place. [2024-06-20 15:49:53,150 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 381 selfloop transitions, 129 changer transitions 0/515 dead transitions. [2024-06-20 15:49:53,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 515 transitions, 8080 flow [2024-06-20 15:49:53,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 15:49:53,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 15:49:53,151 INFO L175 Difference]: Start difference. First operand has 334 places, 494 transitions, 6406 flow. Second operand 8 states and 151 transitions. [2024-06-20 15:49:53,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 515 transitions, 8080 flow [2024-06-20 15:49:55,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 515 transitions, 7906 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 15:49:55,567 INFO L231 Difference]: Finished difference. Result has 336 places, 497 transitions, 6602 flow [2024-06-20 15:49:55,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6232, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6602, PETRI_PLACES=336, PETRI_TRANSITIONS=497} [2024-06-20 15:49:55,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-20 15:49:55,568 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 497 transitions, 6602 flow [2024-06-20 15:49:55,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:55,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:55,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:55,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:49:55,568 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)] === [2024-06-20 15:49:55,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:55,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1532467773, now seen corresponding path program 10 times [2024-06-20 15:49:55,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:55,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704173076] [2024-06-20 15:49:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:55,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:56,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:56,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704173076] [2024-06-20 15:49:56,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704173076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:56,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:56,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:56,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507937369] [2024-06-20 15:49:56,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:56,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:56,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:56,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:56,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:56,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:49:56,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 497 transitions, 6602 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:56,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:56,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:49:56,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:57,896 INFO L124 PetriNetUnfolderBase]: 3598/5835 cut-off events. [2024-06-20 15:49:57,896 INFO L125 PetriNetUnfolderBase]: For 1046493/1046497 co-relation queries the response was YES. [2024-06-20 15:49:57,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59842 conditions, 5835 events. 3598/5835 cut-off events. For 1046493/1046497 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 36559 event pairs, 741 based on Foata normal form. 3/5832 useless extension candidates. Maximal degree in co-relation 59678. Up to 5115 conditions per place. [2024-06-20 15:49:57,986 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 379 selfloop transitions, 127 changer transitions 0/511 dead transitions. [2024-06-20 15:49:57,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 511 transitions, 8078 flow [2024-06-20 15:49:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:57,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 15:49:57,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 15:49:57,987 INFO L175 Difference]: Start difference. First operand has 336 places, 497 transitions, 6602 flow. Second operand 8 states and 146 transitions. [2024-06-20 15:49:57,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 511 transitions, 8078 flow [2024-06-20 15:50:00,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 511 transitions, 7723 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-20 15:50:00,312 INFO L231 Difference]: Finished difference. Result has 339 places, 497 transitions, 6507 flow [2024-06-20 15:50:00,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6247, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6507, PETRI_PLACES=339, PETRI_TRANSITIONS=497} [2024-06-20 15:50:00,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-20 15:50:00,312 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 497 transitions, 6507 flow [2024-06-20 15:50:00,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:00,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:00,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:00,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:50:00,313 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)] === [2024-06-20 15:50:00,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1966278363, now seen corresponding path program 11 times [2024-06-20 15:50:00,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:00,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313531852] [2024-06-20 15:50:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:00,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:01,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:01,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313531852] [2024-06-20 15:50:01,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313531852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:01,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:01,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:01,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875848997] [2024-06-20 15:50:01,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:01,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:01,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:01,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:01,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:01,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:50:01,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 497 transitions, 6507 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:01,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:01,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:50:01,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:02,659 INFO L124 PetriNetUnfolderBase]: 3592/5817 cut-off events. [2024-06-20 15:50:02,659 INFO L125 PetriNetUnfolderBase]: For 1056441/1056445 co-relation queries the response was YES. [2024-06-20 15:50:02,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59427 conditions, 5817 events. 3592/5817 cut-off events. For 1056441/1056445 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 36320 event pairs, 734 based on Foata normal form. 4/5815 useless extension candidates. Maximal degree in co-relation 59262. Up to 5204 conditions per place. [2024-06-20 15:50:02,750 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 427 selfloop transitions, 78 changer transitions 0/510 dead transitions. [2024-06-20 15:50:02,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 510 transitions, 7769 flow [2024-06-20 15:50:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:50:02,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:50:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 15:50:02,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 15:50:02,751 INFO L175 Difference]: Start difference. First operand has 339 places, 497 transitions, 6507 flow. Second operand 8 states and 145 transitions. [2024-06-20 15:50:02,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 510 transitions, 7769 flow [2024-06-20 15:50:05,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 510 transitions, 7362 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-20 15:50:05,515 INFO L231 Difference]: Finished difference. Result has 338 places, 497 transitions, 6265 flow [2024-06-20 15:50:05,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6100, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6265, PETRI_PLACES=338, PETRI_TRANSITIONS=497} [2024-06-20 15:50:05,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-20 15:50:05,515 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 497 transitions, 6265 flow [2024-06-20 15:50:05,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:05,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:05,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:05,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:50:05,515 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)] === [2024-06-20 15:50:05,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:05,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1966545490, now seen corresponding path program 12 times [2024-06-20 15:50:05,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:05,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241666885] [2024-06-20 15:50:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:05,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:06,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:06,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241666885] [2024-06-20 15:50:06,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241666885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:06,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:06,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:06,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702312012] [2024-06-20 15:50:06,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:06,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:06,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:06,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:50:06,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 497 transitions, 6265 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:06,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:06,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:50:06,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:07,667 INFO L124 PetriNetUnfolderBase]: 3580/5801 cut-off events. [2024-06-20 15:50:07,667 INFO L125 PetriNetUnfolderBase]: For 1061099/1061103 co-relation queries the response was YES. [2024-06-20 15:50:07,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58632 conditions, 5801 events. 3580/5801 cut-off events. For 1061099/1061103 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 36225 event pairs, 771 based on Foata normal form. 4/5799 useless extension candidates. Maximal degree in co-relation 58468. Up to 4869 conditions per place. [2024-06-20 15:50:07,755 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 385 selfloop transitions, 124 changer transitions 0/514 dead transitions. [2024-06-20 15:50:07,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 514 transitions, 7821 flow [2024-06-20 15:50:07,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:50:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:50:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 15:50:07,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 15:50:07,756 INFO L175 Difference]: Start difference. First operand has 338 places, 497 transitions, 6265 flow. Second operand 8 states and 151 transitions. [2024-06-20 15:50:07,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 514 transitions, 7821 flow [2024-06-20 15:50:10,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 514 transitions, 7609 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-20 15:50:10,228 INFO L231 Difference]: Finished difference. Result has 341 places, 497 transitions, 6308 flow [2024-06-20 15:50:10,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6053, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6308, PETRI_PLACES=341, PETRI_TRANSITIONS=497} [2024-06-20 15:50:10,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-20 15:50:10,228 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 497 transitions, 6308 flow [2024-06-20 15:50:10,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:10,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:10,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:10,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:50:10,229 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)] === [2024-06-20 15:50:10,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:10,229 INFO L85 PathProgramCache]: Analyzing trace with hash 213305229, now seen corresponding path program 12 times [2024-06-20 15:50:10,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:10,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430684869] [2024-06-20 15:50:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:10,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:11,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:11,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430684869] [2024-06-20 15:50:11,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430684869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:11,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:11,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:11,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447791306] [2024-06-20 15:50:11,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:11,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:11,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:11,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:11,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:11,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:50:11,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 497 transitions, 6308 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:11,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:11,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:50:11,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:12,562 INFO L124 PetriNetUnfolderBase]: 3572/5795 cut-off events. [2024-06-20 15:50:12,562 INFO L125 PetriNetUnfolderBase]: For 1054980/1054984 co-relation queries the response was YES. [2024-06-20 15:50:12,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58510 conditions, 5795 events. 3572/5795 cut-off events. For 1054980/1054984 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 36264 event pairs, 737 based on Foata normal form. 4/5793 useless extension candidates. Maximal degree in co-relation 58345. Up to 5215 conditions per place. [2024-06-20 15:50:12,644 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 64 changer transitions 0/509 dead transitions. [2024-06-20 15:50:12,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 509 transitions, 7352 flow [2024-06-20 15:50:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:50:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:50:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 15:50:12,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 15:50:12,645 INFO L175 Difference]: Start difference. First operand has 341 places, 497 transitions, 6308 flow. Second operand 8 states and 143 transitions. [2024-06-20 15:50:12,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 509 transitions, 7352 flow [2024-06-20 15:50:15,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 509 transitions, 6962 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-20 15:50:15,549 INFO L231 Difference]: Finished difference. Result has 341 places, 497 transitions, 6053 flow [2024-06-20 15:50:15,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5918, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6053, PETRI_PLACES=341, PETRI_TRANSITIONS=497} [2024-06-20 15:50:15,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-20 15:50:15,549 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 497 transitions, 6053 flow [2024-06-20 15:50:15,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:15,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:15,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:15,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:50:15,549 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)] === [2024-06-20 15:50:15,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:15,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1966281928, now seen corresponding path program 5 times [2024-06-20 15:50:15,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:15,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242160406] [2024-06-20 15:50:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:15,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:16,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:16,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242160406] [2024-06-20 15:50:16,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242160406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:16,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:16,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:50:16,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584097567] [2024-06-20 15:50:16,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:16,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:50:16,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:16,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:50:16,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:50:16,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:50:16,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 497 transitions, 6053 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:50:16,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:16,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:50:16,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:17,975 INFO L124 PetriNetUnfolderBase]: 3622/5856 cut-off events. [2024-06-20 15:50:17,975 INFO L125 PetriNetUnfolderBase]: For 1106576/1106580 co-relation queries the response was YES. [2024-06-20 15:50:18,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59538 conditions, 5856 events. 3622/5856 cut-off events. For 1106576/1106580 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 36563 event pairs, 726 based on Foata normal form. 4/5854 useless extension candidates. Maximal degree in co-relation 59373. Up to 5199 conditions per place. [2024-06-20 15:50:18,065 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 435 selfloop transitions, 87 changer transitions 0/527 dead transitions. [2024-06-20 15:50:18,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 527 transitions, 8073 flow [2024-06-20 15:50:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:18,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 15:50:18,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 15:50:18,065 INFO L175 Difference]: Start difference. First operand has 341 places, 497 transitions, 6053 flow. Second operand 9 states and 163 transitions. [2024-06-20 15:50:18,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 527 transitions, 8073 flow [2024-06-20 15:50:20,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 527 transitions, 7896 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:50:20,746 INFO L231 Difference]: Finished difference. Result has 344 places, 510 transitions, 6535 flow [2024-06-20 15:50:20,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5876, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6535, PETRI_PLACES=344, PETRI_TRANSITIONS=510} [2024-06-20 15:50:20,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-20 15:50:20,747 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 510 transitions, 6535 flow [2024-06-20 15:50:20,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:50:20,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:20,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:20,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:50:20,747 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)] === [2024-06-20 15:50:20,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:20,747 INFO L85 PathProgramCache]: Analyzing trace with hash 627225520, now seen corresponding path program 6 times [2024-06-20 15:50:20,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:20,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067337242] [2024-06-20 15:50:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:20,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:21,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:21,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067337242] [2024-06-20 15:50:21,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067337242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:21,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:21,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:50:21,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175498008] [2024-06-20 15:50:21,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:21,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:50:21,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:21,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:50:21,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:50:21,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:50:21,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 510 transitions, 6535 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:50:21,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:21,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:50:21,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:23,192 INFO L124 PetriNetUnfolderBase]: 3654/5907 cut-off events. [2024-06-20 15:50:23,192 INFO L125 PetriNetUnfolderBase]: For 1150815/1150819 co-relation queries the response was YES. [2024-06-20 15:50:23,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61212 conditions, 5907 events. 3654/5907 cut-off events. For 1150815/1150819 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 36930 event pairs, 734 based on Foata normal form. 6/5907 useless extension candidates. Maximal degree in co-relation 61044. Up to 5206 conditions per place. [2024-06-20 15:50:23,282 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 435 selfloop transitions, 93 changer transitions 0/533 dead transitions. [2024-06-20 15:50:23,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 533 transitions, 8205 flow [2024-06-20 15:50:23,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:23,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 15:50:23,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 15:50:23,283 INFO L175 Difference]: Start difference. First operand has 344 places, 510 transitions, 6535 flow. Second operand 9 states and 163 transitions. [2024-06-20 15:50:23,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 533 transitions, 8205 flow [2024-06-20 15:50:25,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 533 transitions, 7831 flow, removed 151 selfloop flow, removed 4 redundant places. [2024-06-20 15:50:25,768 INFO L231 Difference]: Finished difference. Result has 350 places, 518 transitions, 6675 flow [2024-06-20 15:50:25,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6163, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6675, PETRI_PLACES=350, PETRI_TRANSITIONS=518} [2024-06-20 15:50:25,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-20 15:50:25,769 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 518 transitions, 6675 flow [2024-06-20 15:50:25,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:50:25,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:25,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:25,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:50:25,770 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)] === [2024-06-20 15:50:25,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:25,770 INFO L85 PathProgramCache]: Analyzing trace with hash 470962814, now seen corresponding path program 7 times [2024-06-20 15:50:25,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:25,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580969824] [2024-06-20 15:50:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:25,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:26,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:26,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580969824] [2024-06-20 15:50:26,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580969824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:26,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:26,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:50:26,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520698445] [2024-06-20 15:50:26,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:26,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:50:26,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:26,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:50:26,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:50:26,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:50:26,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 518 transitions, 6675 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:50:26,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:26,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:50:26,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:28,282 INFO L124 PetriNetUnfolderBase]: 3672/5934 cut-off events. [2024-06-20 15:50:28,282 INFO L125 PetriNetUnfolderBase]: For 1166670/1166674 co-relation queries the response was YES. [2024-06-20 15:50:28,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62187 conditions, 5934 events. 3672/5934 cut-off events. For 1166670/1166674 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 37032 event pairs, 718 based on Foata normal form. 4/5932 useless extension candidates. Maximal degree in co-relation 62016. Up to 5056 conditions per place. [2024-06-20 15:50:28,375 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 404 selfloop transitions, 147 changer transitions 0/556 dead transitions. [2024-06-20 15:50:28,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 556 transitions, 9109 flow [2024-06-20 15:50:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 15:50:28,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 15:50:28,376 INFO L175 Difference]: Start difference. First operand has 350 places, 518 transitions, 6675 flow. Second operand 9 states and 166 transitions. [2024-06-20 15:50:28,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 556 transitions, 9109 flow [2024-06-20 15:50:31,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 556 transitions, 8800 flow, removed 95 selfloop flow, removed 6 redundant places. [2024-06-20 15:50:31,075 INFO L231 Difference]: Finished difference. Result has 356 places, 535 transitions, 7327 flow [2024-06-20 15:50:31,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6366, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7327, PETRI_PLACES=356, PETRI_TRANSITIONS=535} [2024-06-20 15:50:31,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-20 15:50:31,076 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 535 transitions, 7327 flow [2024-06-20 15:50:31,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:50:31,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:31,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:31,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:50:31,076 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)] === [2024-06-20 15:50:31,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1966656718, now seen corresponding path program 8 times [2024-06-20 15:50:31,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:31,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958933030] [2024-06-20 15:50:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:31,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:32,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:32,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958933030] [2024-06-20 15:50:32,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958933030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:32,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:32,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:50:32,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821889659] [2024-06-20 15:50:32,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:32,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:50:32,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:32,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:50:32,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:50:32,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:50:32,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 535 transitions, 7327 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:50:32,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:32,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:50:32,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:33,599 INFO L124 PetriNetUnfolderBase]: 3674/5933 cut-off events. [2024-06-20 15:50:33,599 INFO L125 PetriNetUnfolderBase]: For 1191167/1191171 co-relation queries the response was YES. [2024-06-20 15:50:33,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63153 conditions, 5933 events. 3674/5933 cut-off events. For 1191167/1191171 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 37082 event pairs, 726 based on Foata normal form. 4/5931 useless extension candidates. Maximal degree in co-relation 62978. Up to 5351 conditions per place. [2024-06-20 15:50:33,698 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 477 selfloop transitions, 70 changer transitions 0/552 dead transitions. [2024-06-20 15:50:33,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 552 transitions, 8611 flow [2024-06-20 15:50:33,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 15:50:33,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 15:50:33,699 INFO L175 Difference]: Start difference. First operand has 356 places, 535 transitions, 7327 flow. Second operand 9 states and 158 transitions. [2024-06-20 15:50:33,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 552 transitions, 8611 flow [2024-06-20 15:50:36,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 552 transitions, 8303 flow, removed 121 selfloop flow, removed 3 redundant places. [2024-06-20 15:50:36,645 INFO L231 Difference]: Finished difference. Result has 362 places, 539 transitions, 7326 flow [2024-06-20 15:50:36,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7019, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7326, PETRI_PLACES=362, PETRI_TRANSITIONS=539} [2024-06-20 15:50:36,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-20 15:50:36,645 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 539 transitions, 7326 flow [2024-06-20 15:50:36,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:50:36,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:36,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:36,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:50:36,646 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)] === [2024-06-20 15:50:36,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:36,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1538172238, now seen corresponding path program 9 times [2024-06-20 15:50:36,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:36,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821624603] [2024-06-20 15:50:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:36,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:37,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:37,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821624603] [2024-06-20 15:50:37,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821624603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:37,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:37,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:50:37,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520314439] [2024-06-20 15:50:37,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:37,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:50:37,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:37,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:50:37,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:50:37,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:50:37,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 539 transitions, 7326 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:50:37,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:37,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:50:37,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:39,243 INFO L124 PetriNetUnfolderBase]: 3738/6035 cut-off events. [2024-06-20 15:50:39,243 INFO L125 PetriNetUnfolderBase]: For 1251853/1251857 co-relation queries the response was YES. [2024-06-20 15:50:39,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65048 conditions, 6035 events. 3738/6035 cut-off events. For 1251853/1251857 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 37800 event pairs, 725 based on Foata normal form. 6/6035 useless extension candidates. Maximal degree in co-relation 64871. Up to 4955 conditions per place. [2024-06-20 15:50:39,336 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 399 selfloop transitions, 174 changer transitions 0/578 dead transitions. [2024-06-20 15:50:39,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 578 transitions, 10128 flow [2024-06-20 15:50:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:39,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 15:50:39,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 15:50:39,348 INFO L175 Difference]: Start difference. First operand has 362 places, 539 transitions, 7326 flow. Second operand 9 states and 170 transitions. [2024-06-20 15:50:39,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 578 transitions, 10128 flow [2024-06-20 15:50:42,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 578 transitions, 9873 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-20 15:50:42,552 INFO L231 Difference]: Finished difference. Result has 365 places, 556 transitions, 8076 flow [2024-06-20 15:50:42,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7071, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8076, PETRI_PLACES=365, PETRI_TRANSITIONS=556} [2024-06-20 15:50:42,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-20 15:50:42,552 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 556 transitions, 8076 flow [2024-06-20 15:50:42,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:50:42,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:42,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:42,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:50:42,553 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)] === [2024-06-20 15:50:42,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1953324238, now seen corresponding path program 10 times [2024-06-20 15:50:42,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:42,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961147603] [2024-06-20 15:50:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:42,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:43,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:43,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961147603] [2024-06-20 15:50:43,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961147603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:43,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:43,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:50:43,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138079848] [2024-06-20 15:50:43,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:43,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:50:43,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:43,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:50:43,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:50:43,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:50:43,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 556 transitions, 8076 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:50:43,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:43,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:50:43,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:45,316 INFO L124 PetriNetUnfolderBase]: 3734/6038 cut-off events. [2024-06-20 15:50:45,317 INFO L125 PetriNetUnfolderBase]: For 1255304/1255308 co-relation queries the response was YES. [2024-06-20 15:50:45,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65701 conditions, 6038 events. 3734/6038 cut-off events. For 1255304/1255308 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 37896 event pairs, 756 based on Foata normal form. 4/6041 useless extension candidates. Maximal degree in co-relation 65522. Up to 5600 conditions per place. [2024-06-20 15:50:45,417 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 521 selfloop transitions, 46 changer transitions 0/572 dead transitions. [2024-06-20 15:50:45,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 572 transitions, 9519 flow [2024-06-20 15:50:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 15:50:45,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 15:50:45,418 INFO L175 Difference]: Start difference. First operand has 365 places, 556 transitions, 8076 flow. Second operand 9 states and 155 transitions. [2024-06-20 15:50:45,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 572 transitions, 9519 flow [2024-06-20 15:50:48,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 572 transitions, 8779 flow, removed 233 selfloop flow, removed 6 redundant places. [2024-06-20 15:50:48,841 INFO L231 Difference]: Finished difference. Result has 369 places, 558 transitions, 7488 flow [2024-06-20 15:50:48,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7350, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7488, PETRI_PLACES=369, PETRI_TRANSITIONS=558} [2024-06-20 15:50:48,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-20 15:50:48,841 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 558 transitions, 7488 flow [2024-06-20 15:50:48,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:50:48,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:48,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:48,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:50:48,842 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)] === [2024-06-20 15:50:48,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:48,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1933010823, now seen corresponding path program 1 times [2024-06-20 15:50:48,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:48,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205175915] [2024-06-20 15:50:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:48,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:49,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:49,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205175915] [2024-06-20 15:50:49,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205175915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:49,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:49,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:50:49,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238092540] [2024-06-20 15:50:49,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:49,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:50:49,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:49,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:50:49,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:50:49,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:50:49,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 558 transitions, 7488 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:49,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:49,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:50:49,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:51,510 INFO L124 PetriNetUnfolderBase]: 3622/5935 cut-off events. [2024-06-20 15:50:51,510 INFO L125 PetriNetUnfolderBase]: For 1276549/1276553 co-relation queries the response was YES. [2024-06-20 15:50:51,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63557 conditions, 5935 events. 3622/5935 cut-off events. For 1276549/1276553 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 37884 event pairs, 722 based on Foata normal form. 3/5936 useless extension candidates. Maximal degree in co-relation 63377. Up to 5365 conditions per place. [2024-06-20 15:50:51,610 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 532 selfloop transitions, 20 changer transitions 0/583 dead transitions. [2024-06-20 15:50:51,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 583 transitions, 8764 flow [2024-06-20 15:50:51,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 15:50:51,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 15:50:51,611 INFO L175 Difference]: Start difference. First operand has 369 places, 558 transitions, 7488 flow. Second operand 9 states and 165 transitions. [2024-06-20 15:50:51,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 583 transitions, 8764 flow [2024-06-20 15:50:55,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 583 transitions, 8324 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-20 15:50:55,006 INFO L231 Difference]: Finished difference. Result has 368 places, 561 transitions, 7188 flow [2024-06-20 15:50:55,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7048, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7188, PETRI_PLACES=368, PETRI_TRANSITIONS=561} [2024-06-20 15:50:55,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-20 15:50:55,006 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 561 transitions, 7188 flow [2024-06-20 15:50:55,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:55,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:55,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:55,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:50:55,007 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)] === [2024-06-20 15:50:55,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:55,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1336454385, now seen corresponding path program 2 times [2024-06-20 15:50:55,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:55,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406053578] [2024-06-20 15:50:55,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:55,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:56,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:56,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406053578] [2024-06-20 15:50:56,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406053578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:56,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:56,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:50:56,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104154721] [2024-06-20 15:50:56,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:56,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:50:56,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:56,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:50:56,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:50:56,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:50:56,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 561 transitions, 7188 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:56,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:56,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:50:56,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:57,882 INFO L124 PetriNetUnfolderBase]: 3631/5952 cut-off events. [2024-06-20 15:50:57,882 INFO L125 PetriNetUnfolderBase]: For 1285742/1285748 co-relation queries the response was YES. [2024-06-20 15:50:57,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63466 conditions, 5952 events. 3631/5952 cut-off events. For 1285742/1285748 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 38070 event pairs, 719 based on Foata normal form. 1/5951 useless extension candidates. Maximal degree in co-relation 63289. Up to 5379 conditions per place. [2024-06-20 15:50:57,980 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 531 selfloop transitions, 21 changer transitions 0/583 dead transitions. [2024-06-20 15:50:57,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 583 transitions, 8464 flow [2024-06-20 15:50:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:57,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:57,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 15:50:57,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 15:50:57,981 INFO L175 Difference]: Start difference. First operand has 368 places, 561 transitions, 7188 flow. Second operand 9 states and 163 transitions. [2024-06-20 15:50:57,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 583 transitions, 8464 flow [2024-06-20 15:51:01,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 583 transitions, 8360 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-20 15:51:01,445 INFO L231 Difference]: Finished difference. Result has 370 places, 564 transitions, 7236 flow [2024-06-20 15:51:01,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7084, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7236, PETRI_PLACES=370, PETRI_TRANSITIONS=564} [2024-06-20 15:51:01,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-20 15:51:01,445 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 564 transitions, 7236 flow [2024-06-20 15:51:01,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:01,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:01,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:01,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:51:01,446 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)] === [2024-06-20 15:51:01,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:01,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1480344915, now seen corresponding path program 3 times [2024-06-20 15:51:01,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:01,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656136089] [2024-06-20 15:51:01,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:01,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:02,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:02,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656136089] [2024-06-20 15:51:02,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656136089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:02,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:02,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:51:02,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817720998] [2024-06-20 15:51:02,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:02,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:51:02,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:02,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:51:02,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:51:02,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:51:02,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 564 transitions, 7236 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:02,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:02,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:51:02,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:04,218 INFO L124 PetriNetUnfolderBase]: 3635/5962 cut-off events. [2024-06-20 15:51:04,218 INFO L125 PetriNetUnfolderBase]: For 1311555/1311569 co-relation queries the response was YES. [2024-06-20 15:51:04,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63890 conditions, 5962 events. 3635/5962 cut-off events. For 1311555/1311569 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 38173 event pairs, 716 based on Foata normal form. 4/5965 useless extension candidates. Maximal degree in co-relation 63712. Up to 5376 conditions per place. [2024-06-20 15:51:04,317 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 531 selfloop transitions, 26 changer transitions 0/588 dead transitions. [2024-06-20 15:51:04,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 588 transitions, 8597 flow [2024-06-20 15:51:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:51:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:51:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 15:51:04,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 15:51:04,318 INFO L175 Difference]: Start difference. First operand has 370 places, 564 transitions, 7236 flow. Second operand 9 states and 163 transitions. [2024-06-20 15:51:04,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 588 transitions, 8597 flow [2024-06-20 15:51:07,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 588 transitions, 8467 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-20 15:51:07,721 INFO L231 Difference]: Finished difference. Result has 373 places, 571 transitions, 7342 flow [2024-06-20 15:51:07,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7106, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7342, PETRI_PLACES=373, PETRI_TRANSITIONS=571} [2024-06-20 15:51:07,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-20 15:51:07,722 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 571 transitions, 7342 flow [2024-06-20 15:51:07,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:07,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:07,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:07,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:51:07,723 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)] === [2024-06-20 15:51:07,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:07,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2112505953, now seen corresponding path program 1 times [2024-06-20 15:51:07,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:07,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699980378] [2024-06-20 15:51:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:07,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:08,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:08,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699980378] [2024-06-20 15:51:08,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699980378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:08,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:08,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:51:08,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688649989] [2024-06-20 15:51:08,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:08,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:51:08,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:08,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:51:08,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:51:09,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:51:09,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 571 transitions, 7342 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:51:09,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:09,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:51:09,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:10,593 INFO L124 PetriNetUnfolderBase]: 3764/6091 cut-off events. [2024-06-20 15:51:10,593 INFO L125 PetriNetUnfolderBase]: For 1320886/1320888 co-relation queries the response was YES. [2024-06-20 15:51:10,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65163 conditions, 6091 events. 3764/6091 cut-off events. For 1320886/1320888 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 38317 event pairs, 753 based on Foata normal form. 1/6091 useless extension candidates. Maximal degree in co-relation 64983. Up to 5689 conditions per place. [2024-06-20 15:51:10,687 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 561 selfloop transitions, 20 changer transitions 0/586 dead transitions. [2024-06-20 15:51:10,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 586 transitions, 8546 flow [2024-06-20 15:51:10,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:51:10,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:51:10,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 15:51:10,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-20 15:51:10,688 INFO L175 Difference]: Start difference. First operand has 373 places, 571 transitions, 7342 flow. Second operand 9 states and 150 transitions. [2024-06-20 15:51:10,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 586 transitions, 8546 flow [2024-06-20 15:51:13,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 586 transitions, 8390 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-20 15:51:13,752 INFO L231 Difference]: Finished difference. Result has 377 places, 571 transitions, 7232 flow [2024-06-20 15:51:13,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7186, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7232, PETRI_PLACES=377, PETRI_TRANSITIONS=571} [2024-06-20 15:51:13,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-20 15:51:13,752 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 571 transitions, 7232 flow [2024-06-20 15:51:13,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:51:13,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:13,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:13,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:51:13,753 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)] === [2024-06-20 15:51:13,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:13,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1480546725, now seen corresponding path program 4 times [2024-06-20 15:51:13,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:13,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098511320] [2024-06-20 15:51:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:13,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:14,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:14,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098511320] [2024-06-20 15:51:14,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098511320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:14,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:14,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:51:14,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925512431] [2024-06-20 15:51:14,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:14,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:51:14,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:14,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:51:14,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:51:15,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:51:15,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 571 transitions, 7232 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:15,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:15,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:51:15,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:16,622 INFO L124 PetriNetUnfolderBase]: 3651/5992 cut-off events. [2024-06-20 15:51:16,622 INFO L125 PetriNetUnfolderBase]: For 1372087/1372101 co-relation queries the response was YES. [2024-06-20 15:51:16,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65018 conditions, 5992 events. 3651/5992 cut-off events. For 1372087/1372101 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 38428 event pairs, 714 based on Foata normal form. 5/5996 useless extension candidates. Maximal degree in co-relation 64836. Up to 5340 conditions per place. [2024-06-20 15:51:16,726 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 517 selfloop transitions, 52 changer transitions 0/600 dead transitions. [2024-06-20 15:51:16,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 600 transitions, 9276 flow [2024-06-20 15:51:16,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:51:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:51:16,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 15:51:16,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 15:51:16,727 INFO L175 Difference]: Start difference. First operand has 377 places, 571 transitions, 7232 flow. Second operand 9 states and 169 transitions. [2024-06-20 15:51:16,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 600 transitions, 9276 flow [2024-06-20 15:51:19,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 600 transitions, 9173 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 15:51:19,882 INFO L231 Difference]: Finished difference. Result has 379 places, 581 transitions, 7580 flow [2024-06-20 15:51:19,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7129, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7580, PETRI_PLACES=379, PETRI_TRANSITIONS=581} [2024-06-20 15:51:19,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-20 15:51:19,882 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 581 transitions, 7580 flow [2024-06-20 15:51:19,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:19,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:19,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:19,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:51:19,882 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)] === [2024-06-20 15:51:19,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:19,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1532459837, now seen corresponding path program 5 times [2024-06-20 15:51:19,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:19,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869958636] [2024-06-20 15:51:19,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:19,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:21,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:21,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869958636] [2024-06-20 15:51:21,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869958636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:21,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:21,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:51:21,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633529066] [2024-06-20 15:51:21,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:21,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:51:21,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:21,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:51:21,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:51:21,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:51:21,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 581 transitions, 7580 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:21,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:21,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:51:21,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:22,832 INFO L124 PetriNetUnfolderBase]: 3673/6030 cut-off events. [2024-06-20 15:51:22,832 INFO L125 PetriNetUnfolderBase]: For 1412743/1412759 co-relation queries the response was YES. [2024-06-20 15:51:22,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66405 conditions, 6030 events. 3673/6030 cut-off events. For 1412743/1412759 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 38765 event pairs, 721 based on Foata normal form. 6/6034 useless extension candidates. Maximal degree in co-relation 66222. Up to 5261 conditions per place. [2024-06-20 15:51:22,923 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 486 selfloop transitions, 91 changer transitions 0/608 dead transitions. [2024-06-20 15:51:22,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 608 transitions, 9684 flow [2024-06-20 15:51:22,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:51:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:51:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 15:51:22,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 15:51:22,925 INFO L175 Difference]: Start difference. First operand has 379 places, 581 transitions, 7580 flow. Second operand 9 states and 170 transitions. [2024-06-20 15:51:22,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 608 transitions, 9684 flow [2024-06-20 15:51:25,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 608 transitions, 9494 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-20 15:51:25,548 INFO L231 Difference]: Finished difference. Result has 384 places, 591 transitions, 7939 flow [2024-06-20 15:51:25,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7402, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7939, PETRI_PLACES=384, PETRI_TRANSITIONS=591} [2024-06-20 15:51:25,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-20 15:51:25,548 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 591 transitions, 7939 flow [2024-06-20 15:51:25,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:25,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:25,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:25,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:51:25,548 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)] === [2024-06-20 15:51:25,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:25,549 INFO L85 PathProgramCache]: Analyzing trace with hash 219985915, now seen corresponding path program 6 times [2024-06-20 15:51:25,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:25,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432261362] [2024-06-20 15:51:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:25,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:26,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:26,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432261362] [2024-06-20 15:51:26,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432261362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:26,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:26,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:51:26,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974473993] [2024-06-20 15:51:26,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:26,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:51:26,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:26,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:51:26,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:51:27,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:51:27,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 591 transitions, 7939 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:27,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:27,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:51:27,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:28,549 INFO L124 PetriNetUnfolderBase]: 3677/6038 cut-off events. [2024-06-20 15:51:28,549 INFO L125 PetriNetUnfolderBase]: For 1420714/1420730 co-relation queries the response was YES. [2024-06-20 15:51:28,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66904 conditions, 6038 events. 3677/6038 cut-off events. For 1420714/1420730 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 38880 event pairs, 721 based on Foata normal form. 4/6041 useless extension candidates. Maximal degree in co-relation 66719. Up to 5425 conditions per place. [2024-06-20 15:51:28,651 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 544 selfloop transitions, 33 changer transitions 0/608 dead transitions. [2024-06-20 15:51:28,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 608 transitions, 9289 flow [2024-06-20 15:51:28,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:51:28,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:51:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 15:51:28,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 15:51:28,652 INFO L175 Difference]: Start difference. First operand has 384 places, 591 transitions, 7939 flow. Second operand 9 states and 162 transitions. [2024-06-20 15:51:28,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 608 transitions, 9289 flow [2024-06-20 15:51:32,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 608 transitions, 9083 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-20 15:51:32,411 INFO L231 Difference]: Finished difference. Result has 389 places, 594 transitions, 7931 flow [2024-06-20 15:51:32,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7737, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7931, PETRI_PLACES=389, PETRI_TRANSITIONS=594} [2024-06-20 15:51:32,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-20 15:51:32,412 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 594 transitions, 7931 flow [2024-06-20 15:51:32,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:32,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:32,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:32,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:51:32,413 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)] === [2024-06-20 15:51:32,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:32,413 INFO L85 PathProgramCache]: Analyzing trace with hash 220195661, now seen corresponding path program 2 times [2024-06-20 15:51:32,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:32,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776779698] [2024-06-20 15:51:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:32,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:33,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:33,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776779698] [2024-06-20 15:51:33,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776779698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:33,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:33,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:51:33,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057216879] [2024-06-20 15:51:33,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:33,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:51:33,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:33,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:51:33,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:51:34,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:51:34,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 594 transitions, 7931 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:51:34,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:34,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:51:34,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:35,601 INFO L124 PetriNetUnfolderBase]: 3823/6192 cut-off events. [2024-06-20 15:51:35,601 INFO L125 PetriNetUnfolderBase]: For 1417280/1417284 co-relation queries the response was YES. [2024-06-20 15:51:35,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67436 conditions, 6192 events. 3823/6192 cut-off events. For 1417280/1417284 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 39156 event pairs, 761 based on Foata normal form. 3/6194 useless extension candidates. Maximal degree in co-relation 67249. Up to 5765 conditions per place. [2024-06-20 15:51:35,696 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 576 selfloop transitions, 25 changer transitions 0/606 dead transitions. [2024-06-20 15:51:35,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 606 transitions, 9165 flow [2024-06-20 15:51:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:51:35,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:51:35,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 15:51:35,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-20 15:51:35,698 INFO L175 Difference]: Start difference. First operand has 389 places, 594 transitions, 7931 flow. Second operand 9 states and 149 transitions. [2024-06-20 15:51:35,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 606 transitions, 9165 flow [2024-06-20 15:51:39,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 606 transitions, 8971 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-20 15:51:39,683 INFO L231 Difference]: Finished difference. Result has 391 places, 594 transitions, 7793 flow [2024-06-20 15:51:39,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7737, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7793, PETRI_PLACES=391, PETRI_TRANSITIONS=594} [2024-06-20 15:51:39,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-20 15:51:39,684 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 594 transitions, 7793 flow [2024-06-20 15:51:39,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:51:39,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:39,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:39,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:51:39,684 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)] === [2024-06-20 15:51:39,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:39,684 INFO L85 PathProgramCache]: Analyzing trace with hash 220187725, now seen corresponding path program 7 times [2024-06-20 15:51:39,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:39,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062833391] [2024-06-20 15:51:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:39,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:41,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:41,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062833391] [2024-06-20 15:51:41,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062833391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:41,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:41,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:51:41,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817913635] [2024-06-20 15:51:41,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:41,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:51:41,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:41,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:51:41,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:51:41,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:51:41,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 594 transitions, 7793 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:41,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:41,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:51:41,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:42,843 INFO L124 PetriNetUnfolderBase]: 3671/6031 cut-off events. [2024-06-20 15:51:42,843 INFO L125 PetriNetUnfolderBase]: For 1446473/1446489 co-relation queries the response was YES. [2024-06-20 15:51:42,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66235 conditions, 6031 events. 3671/6031 cut-off events. For 1446473/1446489 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 38774 event pairs, 721 based on Foata normal form. 5/6035 useless extension candidates. Maximal degree in co-relation 66047. Up to 5378 conditions per place. [2024-06-20 15:51:42,941 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 535 selfloop transitions, 52 changer transitions 0/618 dead transitions. [2024-06-20 15:51:42,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 618 transitions, 9827 flow [2024-06-20 15:51:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:51:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:51:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 15:51:42,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 15:51:42,942 INFO L175 Difference]: Start difference. First operand has 391 places, 594 transitions, 7793 flow. Second operand 9 states and 170 transitions. [2024-06-20 15:51:42,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 618 transitions, 9827 flow [2024-06-20 15:51:46,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 618 transitions, 9727 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 15:51:46,838 INFO L231 Difference]: Finished difference. Result has 392 places, 601 transitions, 8058 flow [2024-06-20 15:51:46,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7693, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8058, PETRI_PLACES=392, PETRI_TRANSITIONS=601} [2024-06-20 15:51:46,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-20 15:51:46,838 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 601 transitions, 8058 flow [2024-06-20 15:51:46,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:46,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:46,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:46,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:51:46,839 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)] === [2024-06-20 15:51:46,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:46,839 INFO L85 PathProgramCache]: Analyzing trace with hash -690548019, now seen corresponding path program 1 times [2024-06-20 15:51:46,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:46,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782012656] [2024-06-20 15:51:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:46,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:47,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:47,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782012656] [2024-06-20 15:51:47,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782012656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:47,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:47,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:51:47,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344229391] [2024-06-20 15:51:47,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:47,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:51:47,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:47,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:51:47,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:51:47,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:51:47,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 601 transitions, 8058 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:51:47,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:47,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:51:47,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:49,464 INFO L124 PetriNetUnfolderBase]: 3846/6228 cut-off events. [2024-06-20 15:51:49,464 INFO L125 PetriNetUnfolderBase]: For 1476817/1476825 co-relation queries the response was YES. [2024-06-20 15:51:49,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68081 conditions, 6228 events. 3846/6228 cut-off events. For 1476817/1476825 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 39274 event pairs, 546 based on Foata normal form. 12/6239 useless extension candidates. Maximal degree in co-relation 67892. Up to 5600 conditions per place. [2024-06-20 15:51:49,570 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 590 selfloop transitions, 40 changer transitions 0/635 dead transitions. [2024-06-20 15:51:49,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 635 transitions, 9546 flow [2024-06-20 15:51:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:51:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:51:49,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 15:51:49,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 15:51:49,571 INFO L175 Difference]: Start difference. First operand has 392 places, 601 transitions, 8058 flow. Second operand 9 states and 169 transitions. [2024-06-20 15:51:49,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 635 transitions, 9546 flow [2024-06-20 15:51:53,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 635 transitions, 9216 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-20 15:51:53,336 INFO L231 Difference]: Finished difference. Result has 394 places, 604 transitions, 7950 flow [2024-06-20 15:51:53,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7728, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7950, PETRI_PLACES=394, PETRI_TRANSITIONS=604} [2024-06-20 15:51:53,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-20 15:51:53,337 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 604 transitions, 7950 flow [2024-06-20 15:51:53,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:51:53,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:53,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:53,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:51:53,337 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)] === [2024-06-20 15:51:53,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:53,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2132829439, now seen corresponding path program 2 times [2024-06-20 15:51:53,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:53,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585126167] [2024-06-20 15:51:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:53,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:54,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:54,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585126167] [2024-06-20 15:51:54,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585126167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:54,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:54,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:51:54,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994246206] [2024-06-20 15:51:54,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:54,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:51:54,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:54,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:51:54,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:51:54,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:51:54,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 604 transitions, 7950 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:51:54,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:54,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:51:54,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:55,979 INFO L124 PetriNetUnfolderBase]: 3862/6252 cut-off events. [2024-06-20 15:51:55,979 INFO L125 PetriNetUnfolderBase]: For 1500108/1500116 co-relation queries the response was YES. [2024-06-20 15:51:56,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68388 conditions, 6252 events. 3862/6252 cut-off events. For 1500108/1500116 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 39560 event pairs, 699 based on Foata normal form. 12/6263 useless extension candidates. Maximal degree in co-relation 68199. Up to 5677 conditions per place. [2024-06-20 15:51:56,097 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 588 selfloop transitions, 41 changer transitions 0/634 dead transitions. [2024-06-20 15:51:56,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 634 transitions, 9430 flow [2024-06-20 15:51:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:51:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:51:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 15:51:56,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 15:51:56,099 INFO L175 Difference]: Start difference. First operand has 394 places, 604 transitions, 7950 flow. Second operand 9 states and 166 transitions. [2024-06-20 15:51:56,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 634 transitions, 9430 flow [2024-06-20 15:52:00,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 634 transitions, 9230 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:00,324 INFO L231 Difference]: Finished difference. Result has 396 places, 607 transitions, 7980 flow [2024-06-20 15:52:00,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7750, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7980, PETRI_PLACES=396, PETRI_TRANSITIONS=607} [2024-06-20 15:52:00,324 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-20 15:52:00,325 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 607 transitions, 7980 flow [2024-06-20 15:52:00,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:52:00,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:00,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:00,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:52:00,325 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)] === [2024-06-20 15:52:00,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:00,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2133185629, now seen corresponding path program 3 times [2024-06-20 15:52:00,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:00,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461607595] [2024-06-20 15:52:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:00,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:01,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:01,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461607595] [2024-06-20 15:52:01,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461607595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:01,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:01,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:01,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833324660] [2024-06-20 15:52:01,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:01,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:01,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:01,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:01,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:01,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:52:01,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 607 transitions, 7980 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:52:01,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:01,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:52:01,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:03,020 INFO L124 PetriNetUnfolderBase]: 3878/6276 cut-off events. [2024-06-20 15:52:03,020 INFO L125 PetriNetUnfolderBase]: For 1523975/1523983 co-relation queries the response was YES. [2024-06-20 15:52:03,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68858 conditions, 6276 events. 3878/6276 cut-off events. For 1523975/1523983 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 39701 event pairs, 703 based on Foata normal form. 12/6287 useless extension candidates. Maximal degree in co-relation 68668. Up to 5711 conditions per place. [2024-06-20 15:52:03,125 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 589 selfloop transitions, 42 changer transitions 0/636 dead transitions. [2024-06-20 15:52:03,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 636 transitions, 9468 flow [2024-06-20 15:52:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:03,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 15:52:03,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 15:52:03,126 INFO L175 Difference]: Start difference. First operand has 396 places, 607 transitions, 7980 flow. Second operand 9 states and 166 transitions. [2024-06-20 15:52:03,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 636 transitions, 9468 flow [2024-06-20 15:52:07,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 636 transitions, 9260 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:07,351 INFO L231 Difference]: Finished difference. Result has 398 places, 610 transitions, 8010 flow [2024-06-20 15:52:07,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7772, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8010, PETRI_PLACES=398, PETRI_TRANSITIONS=610} [2024-06-20 15:52:07,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-20 15:52:07,352 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 610 transitions, 8010 flow [2024-06-20 15:52:07,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:52:07,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:07,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:07,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:52:07,352 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)] === [2024-06-20 15:52:07,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:07,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2133198525, now seen corresponding path program 1 times [2024-06-20 15:52:07,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:07,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741871017] [2024-06-20 15:52:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:07,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:08,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:08,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741871017] [2024-06-20 15:52:08,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741871017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:08,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:08,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:08,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143790117] [2024-06-20 15:52:08,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:08,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:08,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:08,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:08,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:08,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:52:08,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 610 transitions, 8010 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 15:52:08,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:08,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:52:08,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:10,310 INFO L124 PetriNetUnfolderBase]: 3888/6290 cut-off events. [2024-06-20 15:52:10,310 INFO L125 PetriNetUnfolderBase]: For 1528058/1528066 co-relation queries the response was YES. [2024-06-20 15:52:10,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69176 conditions, 6290 events. 3888/6290 cut-off events. For 1528058/1528066 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 39797 event pairs, 702 based on Foata normal form. 10/6299 useless extension candidates. Maximal degree in co-relation 68985. Up to 5725 conditions per place. [2024-06-20 15:52:10,409 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 588 selfloop transitions, 47 changer transitions 0/640 dead transitions. [2024-06-20 15:52:10,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 640 transitions, 9509 flow [2024-06-20 15:52:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-20 15:52:10,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-20 15:52:10,410 INFO L175 Difference]: Start difference. First operand has 398 places, 610 transitions, 8010 flow. Second operand 10 states and 181 transitions. [2024-06-20 15:52:10,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 640 transitions, 9509 flow [2024-06-20 15:52:14,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 640 transitions, 9293 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:14,858 INFO L231 Difference]: Finished difference. Result has 401 places, 614 transitions, 8048 flow [2024-06-20 15:52:14,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7794, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8048, PETRI_PLACES=401, PETRI_TRANSITIONS=614} [2024-06-20 15:52:14,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-20 15:52:14,858 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 614 transitions, 8048 flow [2024-06-20 15:52:14,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 15:52:14,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:14,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:14,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:52:14,858 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)] === [2024-06-20 15:52:14,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:14,859 INFO L85 PathProgramCache]: Analyzing trace with hash -971628869, now seen corresponding path program 4 times [2024-06-20 15:52:14,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:14,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403972568] [2024-06-20 15:52:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:14,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:15,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:15,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403972568] [2024-06-20 15:52:15,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403972568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:15,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:15,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:15,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663585268] [2024-06-20 15:52:15,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:15,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:15,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:15,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:15,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:15,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:52:15,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 614 transitions, 8048 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:52:15,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:15,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:52:15,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:17,637 INFO L124 PetriNetUnfolderBase]: 3904/6308 cut-off events. [2024-06-20 15:52:17,637 INFO L125 PetriNetUnfolderBase]: For 1567679/1567683 co-relation queries the response was YES. [2024-06-20 15:52:17,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69513 conditions, 6308 events. 3904/6308 cut-off events. For 1567679/1567683 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 39900 event pairs, 714 based on Foata normal form. 6/6313 useless extension candidates. Maximal degree in co-relation 69321. Up to 5707 conditions per place. [2024-06-20 15:52:17,745 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 579 selfloop transitions, 52 changer transitions 0/636 dead transitions. [2024-06-20 15:52:17,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 636 transitions, 9516 flow [2024-06-20 15:52:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 15:52:17,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 15:52:17,746 INFO L175 Difference]: Start difference. First operand has 401 places, 614 transitions, 8048 flow. Second operand 9 states and 161 transitions. [2024-06-20 15:52:17,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 636 transitions, 9516 flow [2024-06-20 15:52:22,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 636 transitions, 9299 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-20 15:52:22,826 INFO L231 Difference]: Finished difference. Result has 402 places, 617 transitions, 8097 flow [2024-06-20 15:52:22,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7831, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8097, PETRI_PLACES=402, PETRI_TRANSITIONS=617} [2024-06-20 15:52:22,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-20 15:52:22,826 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 617 transitions, 8097 flow [2024-06-20 15:52:22,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:52:22,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:22,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:22,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:52:22,827 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)] === [2024-06-20 15:52:22,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:22,827 INFO L85 PathProgramCache]: Analyzing trace with hash 288371959, now seen corresponding path program 5 times [2024-06-20 15:52:22,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:22,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513751727] [2024-06-20 15:52:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:22,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:23,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:23,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513751727] [2024-06-20 15:52:23,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513751727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:23,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:23,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:23,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039707352] [2024-06-20 15:52:23,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:23,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:23,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:23,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:23,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:23,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:52:23,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 617 transitions, 8097 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:52:23,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:23,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:52:23,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:25,563 INFO L124 PetriNetUnfolderBase]: 3920/6332 cut-off events. [2024-06-20 15:52:25,564 INFO L125 PetriNetUnfolderBase]: For 1594230/1594234 co-relation queries the response was YES. [2024-06-20 15:52:25,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70138 conditions, 6332 events. 3920/6332 cut-off events. For 1594230/1594234 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 40118 event pairs, 712 based on Foata normal form. 6/6337 useless extension candidates. Maximal degree in co-relation 69945. Up to 5721 conditions per place. [2024-06-20 15:52:25,671 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 584 selfloop transitions, 51 changer transitions 0/640 dead transitions. [2024-06-20 15:52:25,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 640 transitions, 9581 flow [2024-06-20 15:52:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:25,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 15:52:25,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 15:52:25,672 INFO L175 Difference]: Start difference. First operand has 402 places, 617 transitions, 8097 flow. Second operand 9 states and 161 transitions. [2024-06-20 15:52:25,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 640 transitions, 9581 flow [2024-06-20 15:52:30,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 640 transitions, 9337 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:30,178 INFO L231 Difference]: Finished difference. Result has 404 places, 620 transitions, 8123 flow [2024-06-20 15:52:30,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7853, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8123, PETRI_PLACES=404, PETRI_TRANSITIONS=620} [2024-06-20 15:52:30,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-20 15:52:30,179 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 620 transitions, 8123 flow [2024-06-20 15:52:30,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:52:30,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:30,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:30,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:52:30,179 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)] === [2024-06-20 15:52:30,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:30,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1212084875, now seen corresponding path program 6 times [2024-06-20 15:52:30,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:30,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914580320] [2024-06-20 15:52:30,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:30,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:31,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:31,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914580320] [2024-06-20 15:52:31,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914580320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:31,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:31,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:31,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376332709] [2024-06-20 15:52:31,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:31,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:31,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:31,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:31,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:31,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:52:31,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 620 transitions, 8123 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:52:31,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:31,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:52:31,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:32,861 INFO L124 PetriNetUnfolderBase]: 3936/6356 cut-off events. [2024-06-20 15:52:32,861 INFO L125 PetriNetUnfolderBase]: For 1618136/1618140 co-relation queries the response was YES. [2024-06-20 15:52:32,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70624 conditions, 6356 events. 3936/6356 cut-off events. For 1618136/1618140 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 40250 event pairs, 716 based on Foata normal form. 6/6361 useless extension candidates. Maximal degree in co-relation 70430. Up to 5709 conditions per place. [2024-06-20 15:52:32,970 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 567 selfloop transitions, 70 changer transitions 0/642 dead transitions. [2024-06-20 15:52:32,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 642 transitions, 9615 flow [2024-06-20 15:52:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:32,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 15:52:32,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 15:52:32,971 INFO L175 Difference]: Start difference. First operand has 404 places, 620 transitions, 8123 flow. Second operand 9 states and 162 transitions. [2024-06-20 15:52:32,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 642 transitions, 9615 flow [2024-06-20 15:52:36,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 642 transitions, 9367 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:36,967 INFO L231 Difference]: Finished difference. Result has 406 places, 623 transitions, 8189 flow [2024-06-20 15:52:36,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7875, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8189, PETRI_PLACES=406, PETRI_TRANSITIONS=623} [2024-06-20 15:52:36,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-20 15:52:36,972 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 623 transitions, 8189 flow [2024-06-20 15:52:36,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:52:36,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:36,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:36,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:52:36,973 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)] === [2024-06-20 15:52:36,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:36,973 INFO L85 PathProgramCache]: Analyzing trace with hash 953102786, now seen corresponding path program 1 times [2024-06-20 15:52:36,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:36,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330670813] [2024-06-20 15:52:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:36,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:37,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:37,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330670813] [2024-06-20 15:52:37,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330670813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:37,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:37,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:37,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040313783] [2024-06-20 15:52:37,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:37,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:37,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:37,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:37,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:52:37,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 623 transitions, 8189 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) [2024-06-20 15:52:37,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:37,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:52:37,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:39,412 INFO L124 PetriNetUnfolderBase]: 3946/6380 cut-off events. [2024-06-20 15:52:39,413 INFO L125 PetriNetUnfolderBase]: For 1620870/1620878 co-relation queries the response was YES. [2024-06-20 15:52:39,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70944 conditions, 6380 events. 3946/6380 cut-off events. For 1620870/1620878 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 40498 event pairs, 716 based on Foata normal form. 8/6387 useless extension candidates. Maximal degree in co-relation 70749. Up to 5684 conditions per place. [2024-06-20 15:52:39,518 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 580 selfloop transitions, 70 changer transitions 0/655 dead transitions. [2024-06-20 15:52:39,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 655 transitions, 9698 flow [2024-06-20 15:52:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 15:52:39,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-20 15:52:39,519 INFO L175 Difference]: Start difference. First operand has 406 places, 623 transitions, 8189 flow. Second operand 8 states and 156 transitions. [2024-06-20 15:52:39,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 655 transitions, 9698 flow [2024-06-20 15:52:43,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 655 transitions, 9406 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:43,802 INFO L231 Difference]: Finished difference. Result has 407 places, 626 transitions, 8141 flow [2024-06-20 15:52:43,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7897, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8141, PETRI_PLACES=407, PETRI_TRANSITIONS=626} [2024-06-20 15:52:43,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-20 15:52:43,802 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 626 transitions, 8141 flow [2024-06-20 15:52:43,802 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) [2024-06-20 15:52:43,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:43,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:43,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 15:52:43,803 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)] === [2024-06-20 15:52:43,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:43,803 INFO L85 PathProgramCache]: Analyzing trace with hash 345553060, now seen corresponding path program 2 times [2024-06-20 15:52:43,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:43,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635928942] [2024-06-20 15:52:43,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:43,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:44,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:44,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635928942] [2024-06-20 15:52:44,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635928942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:44,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:44,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:44,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784657758] [2024-06-20 15:52:44,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:44,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:44,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:44,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:44,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:44,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:52:44,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 626 transitions, 8141 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) [2024-06-20 15:52:44,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:44,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:52:44,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:46,290 INFO L124 PetriNetUnfolderBase]: 3972/6422 cut-off events. [2024-06-20 15:52:46,290 INFO L125 PetriNetUnfolderBase]: For 1658767/1658775 co-relation queries the response was YES. [2024-06-20 15:52:46,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71640 conditions, 6422 events. 3972/6422 cut-off events. For 1658767/1658775 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 40800 event pairs, 719 based on Foata normal form. 8/6429 useless extension candidates. Maximal degree in co-relation 71444. Up to 5685 conditions per place. [2024-06-20 15:52:46,400 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 575 selfloop transitions, 79 changer transitions 0/659 dead transitions. [2024-06-20 15:52:46,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 659 transitions, 10035 flow [2024-06-20 15:52:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 15:52:46,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-20 15:52:46,401 INFO L175 Difference]: Start difference. First operand has 407 places, 626 transitions, 8141 flow. Second operand 8 states and 157 transitions. [2024-06-20 15:52:46,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 659 transitions, 10035 flow [2024-06-20 15:52:50,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 659 transitions, 9732 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-20 15:52:50,833 INFO L231 Difference]: Finished difference. Result has 407 places, 632 transitions, 8202 flow [2024-06-20 15:52:50,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7838, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8202, PETRI_PLACES=407, PETRI_TRANSITIONS=632} [2024-06-20 15:52:50,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-20 15:52:50,833 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 632 transitions, 8202 flow [2024-06-20 15:52:50,834 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) [2024-06-20 15:52:50,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:50,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:50,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 15:52:50,834 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)] === [2024-06-20 15:52:50,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:50,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1210748199, now seen corresponding path program 1 times [2024-06-20 15:52:50,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:50,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057907287] [2024-06-20 15:52:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:50,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:51,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:51,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057907287] [2024-06-20 15:52:51,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057907287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:51,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:51,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:51,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993161444] [2024-06-20 15:52:51,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:51,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:51,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:51,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:51,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:51,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:52:51,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 632 transitions, 8202 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:52:51,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:51,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:52:51,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:53,600 INFO L124 PetriNetUnfolderBase]: 3982/6423 cut-off events. [2024-06-20 15:52:53,600 INFO L125 PetriNetUnfolderBase]: For 1681782/1681786 co-relation queries the response was YES. [2024-06-20 15:52:53,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71837 conditions, 6423 events. 3982/6423 cut-off events. For 1681782/1681786 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 40812 event pairs, 738 based on Foata normal form. 2/6424 useless extension candidates. Maximal degree in co-relation 71642. Up to 5527 conditions per place. [2024-06-20 15:52:53,710 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 541 selfloop transitions, 119 changer transitions 0/665 dead transitions. [2024-06-20 15:52:53,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 665 transitions, 9778 flow [2024-06-20 15:52:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 15:52:53,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-20 15:52:53,710 INFO L175 Difference]: Start difference. First operand has 407 places, 632 transitions, 8202 flow. Second operand 9 states and 173 transitions. [2024-06-20 15:52:53,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 665 transitions, 9778 flow [2024-06-20 15:52:58,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 665 transitions, 9620 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-20 15:52:58,107 INFO L231 Difference]: Finished difference. Result has 412 places, 636 transitions, 8459 flow [2024-06-20 15:52:58,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8044, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8459, PETRI_PLACES=412, PETRI_TRANSITIONS=636} [2024-06-20 15:52:58,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-20 15:52:58,107 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 636 transitions, 8459 flow [2024-06-20 15:52:58,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:52:58,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:58,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:58,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 15:52:58,108 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)] === [2024-06-20 15:52:58,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:58,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1210539662, now seen corresponding path program 3 times [2024-06-20 15:52:58,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:58,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853001156] [2024-06-20 15:52:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:58,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:58,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:58,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853001156] [2024-06-20 15:52:58,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853001156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:58,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:58,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:58,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496530304] [2024-06-20 15:52:58,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:58,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:58,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:58,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:58,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:52:58,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 636 transitions, 8459 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:52:58,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:58,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:52:58,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:00,913 INFO L124 PetriNetUnfolderBase]: 3992/6440 cut-off events. [2024-06-20 15:53:00,913 INFO L125 PetriNetUnfolderBase]: For 1710731/1710735 co-relation queries the response was YES. [2024-06-20 15:53:00,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73041 conditions, 6440 events. 3992/6440 cut-off events. For 1710731/1710735 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 40863 event pairs, 716 based on Foata normal form. 2/6441 useless extension candidates. Maximal degree in co-relation 72844. Up to 5748 conditions per place. [2024-06-20 15:53:01,019 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 596 selfloop transitions, 69 changer transitions 0/670 dead transitions. [2024-06-20 15:53:01,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 670 transitions, 10012 flow [2024-06-20 15:53:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 15:53:01,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 15:53:01,021 INFO L175 Difference]: Start difference. First operand has 412 places, 636 transitions, 8459 flow. Second operand 9 states and 170 transitions. [2024-06-20 15:53:01,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 670 transitions, 10012 flow [2024-06-20 15:53:05,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 670 transitions, 9629 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:05,665 INFO L231 Difference]: Finished difference. Result has 414 places, 639 transitions, 8326 flow [2024-06-20 15:53:05,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8076, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8326, PETRI_PLACES=414, PETRI_TRANSITIONS=639} [2024-06-20 15:53:05,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-20 15:53:05,666 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 639 transitions, 8326 flow [2024-06-20 15:53:05,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:53:05,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:05,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:05,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 15:53:05,666 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)] === [2024-06-20 15:53:05,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:05,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1210868355, now seen corresponding path program 1 times [2024-06-20 15:53:05,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:05,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682624252] [2024-06-20 15:53:05,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:05,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:06,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:06,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682624252] [2024-06-20 15:53:06,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682624252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:06,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:06,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:06,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586017491] [2024-06-20 15:53:06,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:06,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:06,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:06,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:06,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:06,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:53:06,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 639 transitions, 8326 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:53:06,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:06,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:53:06,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:08,505 INFO L124 PetriNetUnfolderBase]: 4012/6466 cut-off events. [2024-06-20 15:53:08,505 INFO L125 PetriNetUnfolderBase]: For 1757949/1757953 co-relation queries the response was YES. [2024-06-20 15:53:08,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73279 conditions, 6466 events. 4012/6466 cut-off events. For 1757949/1757953 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 41031 event pairs, 713 based on Foata normal form. 4/6469 useless extension candidates. Maximal degree in co-relation 73081. Up to 5752 conditions per place. [2024-06-20 15:53:08,618 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 591 selfloop transitions, 75 changer transitions 0/671 dead transitions. [2024-06-20 15:53:08,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 671 transitions, 9936 flow [2024-06-20 15:53:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:08,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 15:53:08,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 15:53:08,619 INFO L175 Difference]: Start difference. First operand has 414 places, 639 transitions, 8326 flow. Second operand 9 states and 170 transitions. [2024-06-20 15:53:08,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 671 transitions, 9936 flow [2024-06-20 15:53:12,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 671 transitions, 9771 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:12,828 INFO L231 Difference]: Finished difference. Result has 417 places, 644 transitions, 8499 flow [2024-06-20 15:53:12,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8161, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8499, PETRI_PLACES=417, PETRI_TRANSITIONS=644} [2024-06-20 15:53:12,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-20 15:53:12,828 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 644 transitions, 8499 flow [2024-06-20 15:53:12,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:53:12,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:12,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:12,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 15:53:12,829 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)] === [2024-06-20 15:53:12,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:12,829 INFO L85 PathProgramCache]: Analyzing trace with hash 958793456, now seen corresponding path program 4 times [2024-06-20 15:53:12,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:12,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158537868] [2024-06-20 15:53:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:12,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:13,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:13,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158537868] [2024-06-20 15:53:13,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158537868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:13,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:13,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:13,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188237474] [2024-06-20 15:53:13,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:13,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:13,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:13,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:13,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:13,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:53:13,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 644 transitions, 8499 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:53:13,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:13,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:53:13,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:15,582 INFO L124 PetriNetUnfolderBase]: 4022/6486 cut-off events. [2024-06-20 15:53:15,582 INFO L125 PetriNetUnfolderBase]: For 1771669/1771673 co-relation queries the response was YES. [2024-06-20 15:53:15,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74426 conditions, 6486 events. 4022/6486 cut-off events. For 1771669/1771673 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 41189 event pairs, 714 based on Foata normal form. 2/6487 useless extension candidates. Maximal degree in co-relation 74227. Up to 5762 conditions per place. [2024-06-20 15:53:15,693 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 599 selfloop transitions, 76 changer transitions 0/680 dead transitions. [2024-06-20 15:53:15,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 680 transitions, 10104 flow [2024-06-20 15:53:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-20 15:53:15,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-20 15:53:15,694 INFO L175 Difference]: Start difference. First operand has 417 places, 644 transitions, 8499 flow. Second operand 10 states and 186 transitions. [2024-06-20 15:53:15,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 680 transitions, 10104 flow [2024-06-20 15:53:20,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 680 transitions, 9800 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:20,704 INFO L231 Difference]: Finished difference. Result has 420 places, 647 transitions, 8462 flow [2024-06-20 15:53:20,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8195, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8462, PETRI_PLACES=420, PETRI_TRANSITIONS=647} [2024-06-20 15:53:20,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-20 15:53:20,705 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 647 transitions, 8462 flow [2024-06-20 15:53:20,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:53:20,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:20,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:20,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 15:53:20,705 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)] === [2024-06-20 15:53:20,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:20,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1819100696, now seen corresponding path program 5 times [2024-06-20 15:53:20,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:20,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483780029] [2024-06-20 15:53:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:20,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:21,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:21,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483780029] [2024-06-20 15:53:21,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483780029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:21,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:21,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:21,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308791189] [2024-06-20 15:53:21,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:21,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:21,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:21,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:21,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:21,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:53:21,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 647 transitions, 8462 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:53:21,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:21,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:53:21,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:23,656 INFO L124 PetriNetUnfolderBase]: 4032/6502 cut-off events. [2024-06-20 15:53:23,656 INFO L125 PetriNetUnfolderBase]: For 1796576/1796580 co-relation queries the response was YES. [2024-06-20 15:53:23,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74491 conditions, 6502 events. 4032/6502 cut-off events. For 1796576/1796580 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 41304 event pairs, 719 based on Foata normal form. 2/6503 useless extension candidates. Maximal degree in co-relation 74291. Up to 5758 conditions per place. [2024-06-20 15:53:23,774 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 591 selfloop transitions, 79 changer transitions 0/675 dead transitions. [2024-06-20 15:53:23,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 675 transitions, 10053 flow [2024-06-20 15:53:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:23,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 15:53:23,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 15:53:23,775 INFO L175 Difference]: Start difference. First operand has 420 places, 647 transitions, 8462 flow. Second operand 9 states and 169 transitions. [2024-06-20 15:53:23,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 675 transitions, 10053 flow [2024-06-20 15:53:29,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 675 transitions, 9825 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:29,319 INFO L231 Difference]: Finished difference. Result has 421 places, 650 transitions, 8513 flow [2024-06-20 15:53:29,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8234, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8513, PETRI_PLACES=421, PETRI_TRANSITIONS=650} [2024-06-20 15:53:29,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-20 15:53:29,319 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 650 transitions, 8513 flow [2024-06-20 15:53:29,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:53:29,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:29,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:29,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 15:53:29,319 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)] === [2024-06-20 15:53:29,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:29,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1215509985, now seen corresponding path program 2 times [2024-06-20 15:53:29,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:29,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904154266] [2024-06-20 15:53:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:29,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:30,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:30,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904154266] [2024-06-20 15:53:30,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904154266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:30,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:30,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:30,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976209988] [2024-06-20 15:53:30,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:30,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:30,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:30,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:30,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:30,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:53:30,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 650 transitions, 8513 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:53:30,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:30,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:53:30,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:32,234 INFO L124 PetriNetUnfolderBase]: 4052/6540 cut-off events. [2024-06-20 15:53:32,235 INFO L125 PetriNetUnfolderBase]: For 1841875/1841879 co-relation queries the response was YES. [2024-06-20 15:53:32,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75006 conditions, 6540 events. 4052/6540 cut-off events. For 1841875/1841879 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 41708 event pairs, 724 based on Foata normal form. 4/6543 useless extension candidates. Maximal degree in co-relation 74805. Up to 5782 conditions per place. [2024-06-20 15:53:32,351 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 593 selfloop transitions, 81 changer transitions 0/679 dead transitions. [2024-06-20 15:53:32,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 679 transitions, 10159 flow [2024-06-20 15:53:32,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:32,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 15:53:32,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 15:53:32,352 INFO L175 Difference]: Start difference. First operand has 421 places, 650 transitions, 8513 flow. Second operand 9 states and 170 transitions. [2024-06-20 15:53:32,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 679 transitions, 10159 flow [2024-06-20 15:53:37,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 679 transitions, 9919 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:37,737 INFO L231 Difference]: Finished difference. Result has 423 places, 655 transitions, 8633 flow [2024-06-20 15:53:37,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8273, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8633, PETRI_PLACES=423, PETRI_TRANSITIONS=655} [2024-06-20 15:53:37,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-20 15:53:37,737 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 655 transitions, 8633 flow [2024-06-20 15:53:37,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:53:37,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:37,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:37,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 15:53:37,738 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)] === [2024-06-20 15:53:37,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:37,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1215504002, now seen corresponding path program 6 times [2024-06-20 15:53:37,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:37,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513493461] [2024-06-20 15:53:37,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:37,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:38,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:38,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513493461] [2024-06-20 15:53:38,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513493461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:38,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:38,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:38,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146991919] [2024-06-20 15:53:38,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:38,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:38,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:38,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:38,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:38,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:53:38,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 655 transitions, 8633 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) [2024-06-20 15:53:38,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:38,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:53:38,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:40,486 INFO L124 PetriNetUnfolderBase]: 4062/6564 cut-off events. [2024-06-20 15:53:40,487 INFO L125 PetriNetUnfolderBase]: For 1855026/1855030 co-relation queries the response was YES. [2024-06-20 15:53:40,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76106 conditions, 6564 events. 4062/6564 cut-off events. For 1855026/1855030 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 41868 event pairs, 741 based on Foata normal form. 2/6565 useless extension candidates. Maximal degree in co-relation 75904. Up to 5654 conditions per place. [2024-06-20 15:53:40,594 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 558 selfloop transitions, 117 changer transitions 0/680 dead transitions. [2024-06-20 15:53:40,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 680 transitions, 10792 flow [2024-06-20 15:53:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:40,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:40,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 15:53:40,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 15:53:40,595 INFO L175 Difference]: Start difference. First operand has 423 places, 655 transitions, 8633 flow. Second operand 8 states and 154 transitions. [2024-06-20 15:53:40,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 680 transitions, 10792 flow [2024-06-20 15:53:45,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 680 transitions, 10466 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:45,224 INFO L231 Difference]: Finished difference. Result has 424 places, 658 transitions, 8662 flow [2024-06-20 15:53:45,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8307, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8662, PETRI_PLACES=424, PETRI_TRANSITIONS=658} [2024-06-20 15:53:45,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-20 15:53:45,225 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 658 transitions, 8662 flow [2024-06-20 15:53:45,225 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) [2024-06-20 15:53:45,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:45,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:45,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 15:53:45,225 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)] === [2024-06-20 15:53:45,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:45,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1215516495, now seen corresponding path program 3 times [2024-06-20 15:53:45,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:45,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639563488] [2024-06-20 15:53:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:45,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:46,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:46,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639563488] [2024-06-20 15:53:46,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639563488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:46,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:46,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:46,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456011415] [2024-06-20 15:53:46,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:46,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:46,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:46,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:46,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:46,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:53:46,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 658 transitions, 8662 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:53:46,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:46,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:53:46,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:48,071 INFO L124 PetriNetUnfolderBase]: 4072/6572 cut-off events. [2024-06-20 15:53:48,071 INFO L125 PetriNetUnfolderBase]: For 1879136/1879140 co-relation queries the response was YES. [2024-06-20 15:53:48,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76228 conditions, 6572 events. 4072/6572 cut-off events. For 1879136/1879140 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 41934 event pairs, 726 based on Foata normal form. 2/6573 useless extension candidates. Maximal degree in co-relation 76025. Up to 5786 conditions per place. [2024-06-20 15:53:48,188 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 587 selfloop transitions, 93 changer transitions 0/685 dead transitions. [2024-06-20 15:53:48,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 685 transitions, 10264 flow [2024-06-20 15:53:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 15:53:48,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 15:53:48,189 INFO L175 Difference]: Start difference. First operand has 424 places, 658 transitions, 8662 flow. Second operand 9 states and 170 transitions. [2024-06-20 15:53:48,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 685 transitions, 10264 flow [2024-06-20 15:53:54,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 685 transitions, 9768 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:54,043 INFO L231 Difference]: Finished difference. Result has 425 places, 662 transitions, 8513 flow [2024-06-20 15:53:54,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8166, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8513, PETRI_PLACES=425, PETRI_TRANSITIONS=662} [2024-06-20 15:53:54,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-20 15:53:54,043 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 662 transitions, 8513 flow [2024-06-20 15:53:54,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:53:54,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:54,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:54,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 15:53:54,044 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)] === [2024-06-20 15:53:54,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1196062359, now seen corresponding path program 1 times [2024-06-20 15:53:54,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:54,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497083113] [2024-06-20 15:53:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:54,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:55,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:55,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497083113] [2024-06-20 15:53:55,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497083113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:55,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:55,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:55,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407648290] [2024-06-20 15:53:55,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:55,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:55,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:55,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:55,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:55,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:53:55,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 662 transitions, 8513 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:53:55,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:55,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:53:55,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:56,926 INFO L124 PetriNetUnfolderBase]: 4082/6574 cut-off events. [2024-06-20 15:53:56,927 INFO L125 PetriNetUnfolderBase]: For 1905959/1905963 co-relation queries the response was YES. [2024-06-20 15:53:57,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76389 conditions, 6574 events. 4082/6574 cut-off events. For 1905959/1905963 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 41812 event pairs, 716 based on Foata normal form. 4/6577 useless extension candidates. Maximal degree in co-relation 76187. Up to 6003 conditions per place. [2024-06-20 15:53:57,053 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 640 selfloop transitions, 43 changer transitions 0/688 dead transitions. [2024-06-20 15:53:57,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 688 transitions, 10068 flow [2024-06-20 15:53:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:57,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 15:53:57,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 15:53:57,055 INFO L175 Difference]: Start difference. First operand has 425 places, 662 transitions, 8513 flow. Second operand 9 states and 163 transitions. [2024-06-20 15:53:57,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 688 transitions, 10068 flow [2024-06-20 15:54:03,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 688 transitions, 9749 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:03,041 INFO L231 Difference]: Finished difference. Result has 427 places, 666 transitions, 8414 flow [2024-06-20 15:54:03,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8194, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8414, PETRI_PLACES=427, PETRI_TRANSITIONS=666} [2024-06-20 15:54:03,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-20 15:54:03,041 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 666 transitions, 8414 flow [2024-06-20 15:54:03,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:54:03,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:03,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:03,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 15:54:03,042 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)] === [2024-06-20 15:54:03,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:03,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1805352809, now seen corresponding path program 2 times [2024-06-20 15:54:03,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:03,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27392838] [2024-06-20 15:54:03,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:03,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:03,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:03,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27392838] [2024-06-20 15:54:03,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27392838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:03,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:03,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:03,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588388957] [2024-06-20 15:54:03,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:03,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:03,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:03,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:03,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:04,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:54:04,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 666 transitions, 8414 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:54:04,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:04,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:54:04,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:05,875 INFO L124 PetriNetUnfolderBase]: 4104/6609 cut-off events. [2024-06-20 15:54:05,875 INFO L125 PetriNetUnfolderBase]: For 1949448/1949452 co-relation queries the response was YES. [2024-06-20 15:54:05,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76630 conditions, 6609 events. 4104/6609 cut-off events. For 1949448/1949452 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 41984 event pairs, 715 based on Foata normal form. 6/6614 useless extension candidates. Maximal degree in co-relation 76427. Up to 5830 conditions per place. [2024-06-20 15:54:06,193 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 591 selfloop transitions, 98 changer transitions 0/694 dead transitions. [2024-06-20 15:54:06,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 694 transitions, 10460 flow [2024-06-20 15:54:06,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:06,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:06,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 15:54:06,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 15:54:06,194 INFO L175 Difference]: Start difference. First operand has 427 places, 666 transitions, 8414 flow. Second operand 9 states and 166 transitions. [2024-06-20 15:54:06,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 694 transitions, 10460 flow [2024-06-20 15:54:10,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 694 transitions, 10297 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:10,929 INFO L231 Difference]: Finished difference. Result has 430 places, 674 transitions, 8813 flow [2024-06-20 15:54:10,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8251, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8813, PETRI_PLACES=430, PETRI_TRANSITIONS=674} [2024-06-20 15:54:10,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-20 15:54:10,929 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 674 transitions, 8813 flow [2024-06-20 15:54:10,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:54:10,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:10,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:10,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 15:54:10,930 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)] === [2024-06-20 15:54:10,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:10,930 INFO L85 PathProgramCache]: Analyzing trace with hash -959887247, now seen corresponding path program 4 times [2024-06-20 15:54:10,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:10,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916786966] [2024-06-20 15:54:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:10,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:12,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:12,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916786966] [2024-06-20 15:54:12,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916786966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:12,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:12,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:12,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201204979] [2024-06-20 15:54:12,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:12,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:12,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:12,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:12,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:12,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:54:12,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 674 transitions, 8813 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:54:12,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:12,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:54:12,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:13,961 INFO L124 PetriNetUnfolderBase]: 4146/6671 cut-off events. [2024-06-20 15:54:13,961 INFO L125 PetriNetUnfolderBase]: For 2003390/2003394 co-relation queries the response was YES. [2024-06-20 15:54:14,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78587 conditions, 6671 events. 4146/6671 cut-off events. For 2003390/2003394 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 42357 event pairs, 744 based on Foata normal form. 2/6672 useless extension candidates. Maximal degree in co-relation 78382. Up to 5589 conditions per place. [2024-06-20 15:54:14,075 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 555 selfloop transitions, 144 changer transitions 0/704 dead transitions. [2024-06-20 15:54:14,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 704 transitions, 11225 flow [2024-06-20 15:54:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 15:54:14,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 15:54:14,076 INFO L175 Difference]: Start difference. First operand has 430 places, 674 transitions, 8813 flow. Second operand 9 states and 170 transitions. [2024-06-20 15:54:14,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 704 transitions, 11225 flow [2024-06-20 15:54:19,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 704 transitions, 10954 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-20 15:54:19,902 INFO L231 Difference]: Finished difference. Result has 434 places, 682 transitions, 9192 flow [2024-06-20 15:54:19,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8542, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9192, PETRI_PLACES=434, PETRI_TRANSITIONS=682} [2024-06-20 15:54:19,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-20 15:54:19,903 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 682 transitions, 9192 flow [2024-06-20 15:54:19,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:54:19,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:19,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:19,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 15:54:19,903 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)] === [2024-06-20 15:54:19,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash -344137279, now seen corresponding path program 3 times [2024-06-20 15:54:19,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:19,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087010990] [2024-06-20 15:54:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:19,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:20,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:20,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087010990] [2024-06-20 15:54:20,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087010990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:20,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:20,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:20,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497239618] [2024-06-20 15:54:20,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:20,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:20,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:20,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:20,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:21,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:54:21,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 682 transitions, 9192 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:54:21,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:21,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:54:21,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:22,844 INFO L124 PetriNetUnfolderBase]: 4156/6683 cut-off events. [2024-06-20 15:54:22,844 INFO L125 PetriNetUnfolderBase]: For 2044887/2044891 co-relation queries the response was YES. [2024-06-20 15:54:22,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80228 conditions, 6683 events. 4156/6683 cut-off events. For 2044887/2044891 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 42455 event pairs, 720 based on Foata normal form. 4/6686 useless extension candidates. Maximal degree in co-relation 80021. Up to 6068 conditions per place. [2024-06-20 15:54:22,965 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 647 selfloop transitions, 52 changer transitions 0/704 dead transitions. [2024-06-20 15:54:22,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 704 transitions, 10777 flow [2024-06-20 15:54:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:22,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:22,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 15:54:22,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 15:54:22,966 INFO L175 Difference]: Start difference. First operand has 434 places, 682 transitions, 9192 flow. Second operand 9 states and 161 transitions. [2024-06-20 15:54:22,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 704 transitions, 10777 flow [2024-06-20 15:54:28,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 704 transitions, 10464 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-20 15:54:28,978 INFO L231 Difference]: Finished difference. Result has 438 places, 686 transitions, 9131 flow [2024-06-20 15:54:28,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8879, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9131, PETRI_PLACES=438, PETRI_TRANSITIONS=686} [2024-06-20 15:54:28,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-20 15:54:28,978 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 686 transitions, 9131 flow [2024-06-20 15:54:28,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:54:28,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:28,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:28,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 15:54:28,978 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)] === [2024-06-20 15:54:28,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:28,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1618496965, now seen corresponding path program 4 times [2024-06-20 15:54:28,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:28,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001465735] [2024-06-20 15:54:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:28,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:29,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:29,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001465735] [2024-06-20 15:54:29,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001465735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:29,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:29,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:29,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191688665] [2024-06-20 15:54:29,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:29,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:29,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:29,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:29,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:29,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:54:29,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 686 transitions, 9131 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:54:29,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:29,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:54:29,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:32,028 INFO L124 PetriNetUnfolderBase]: 4168/6700 cut-off events. [2024-06-20 15:54:32,028 INFO L125 PetriNetUnfolderBase]: For 2077019/2077023 co-relation queries the response was YES. [2024-06-20 15:54:32,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80401 conditions, 6700 events. 4168/6700 cut-off events. For 2077019/2077023 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 42539 event pairs, 716 based on Foata normal form. 6/6705 useless extension candidates. Maximal degree in co-relation 80192. Up to 5904 conditions per place. [2024-06-20 15:54:32,143 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 604 selfloop transitions, 104 changer transitions 0/713 dead transitions. [2024-06-20 15:54:32,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 713 transitions, 11148 flow [2024-06-20 15:54:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:32,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 15:54:32,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 15:54:32,144 INFO L175 Difference]: Start difference. First operand has 438 places, 686 transitions, 9131 flow. Second operand 9 states and 168 transitions. [2024-06-20 15:54:32,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 713 transitions, 11148 flow [2024-06-20 15:54:37,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 713 transitions, 10957 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:37,781 INFO L231 Difference]: Finished difference. Result has 440 places, 692 transitions, 9365 flow [2024-06-20 15:54:37,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8940, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9365, PETRI_PLACES=440, PETRI_TRANSITIONS=692} [2024-06-20 15:54:37,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-20 15:54:37,782 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 692 transitions, 9365 flow [2024-06-20 15:54:37,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:54:37,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:37,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:37,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 15:54:37,782 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)] === [2024-06-20 15:54:37,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:37,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1220242463, now seen corresponding path program 5 times [2024-06-20 15:54:37,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:37,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204689016] [2024-06-20 15:54:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:37,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:38,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:38,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204689016] [2024-06-20 15:54:38,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204689016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:38,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:38,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:38,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390629631] [2024-06-20 15:54:38,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:38,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:38,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:38,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:38,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:38,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:54:38,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 692 transitions, 9365 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:54:38,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:38,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:54:38,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:40,820 INFO L124 PetriNetUnfolderBase]: 4188/6730 cut-off events. [2024-06-20 15:54:40,820 INFO L125 PetriNetUnfolderBase]: For 2107520/2107524 co-relation queries the response was YES. [2024-06-20 15:54:40,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81125 conditions, 6730 events. 4188/6730 cut-off events. For 2107520/2107524 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 42744 event pairs, 742 based on Foata normal form. 4/6733 useless extension candidates. Maximal degree in co-relation 80915. Up to 5818 conditions per place. [2024-06-20 15:54:40,961 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 597 selfloop transitions, 116 changer transitions 0/718 dead transitions. [2024-06-20 15:54:40,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 718 transitions, 11391 flow [2024-06-20 15:54:40,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 15:54:40,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 15:54:40,962 INFO L175 Difference]: Start difference. First operand has 440 places, 692 transitions, 9365 flow. Second operand 9 states and 168 transitions. [2024-06-20 15:54:40,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 718 transitions, 11391 flow [2024-06-20 15:54:46,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 718 transitions, 11120 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-20 15:54:46,294 INFO L231 Difference]: Finished difference. Result has 443 places, 697 transitions, 9530 flow [2024-06-20 15:54:46,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9094, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9530, PETRI_PLACES=443, PETRI_TRANSITIONS=697} [2024-06-20 15:54:46,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-20 15:54:46,295 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 697 transitions, 9530 flow [2024-06-20 15:54:46,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:54:46,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:46,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:46,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 15:54:46,295 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)] === [2024-06-20 15:54:46,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash -968161457, now seen corresponding path program 6 times [2024-06-20 15:54:46,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:46,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747554125] [2024-06-20 15:54:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:46,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:47,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:47,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747554125] [2024-06-20 15:54:47,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747554125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:47,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:47,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:47,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110690422] [2024-06-20 15:54:47,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:47,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:47,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:47,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:47,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:47,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:54:47,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 697 transitions, 9530 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:54:47,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:47,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:54:47,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:49,252 INFO L124 PetriNetUnfolderBase]: 4198/6744 cut-off events. [2024-06-20 15:54:49,253 INFO L125 PetriNetUnfolderBase]: For 2115123/2115127 co-relation queries the response was YES. [2024-06-20 15:54:49,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81653 conditions, 6744 events. 4198/6744 cut-off events. For 2115123/2115127 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 42816 event pairs, 742 based on Foata normal form. 2/6745 useless extension candidates. Maximal degree in co-relation 81442. Up to 5820 conditions per place. [2024-06-20 15:54:49,380 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 594 selfloop transitions, 123 changer transitions 0/722 dead transitions. [2024-06-20 15:54:49,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 722 transitions, 11535 flow [2024-06-20 15:54:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 15:54:49,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 15:54:49,381 INFO L175 Difference]: Start difference. First operand has 443 places, 697 transitions, 9530 flow. Second operand 9 states and 170 transitions. [2024-06-20 15:54:49,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 722 transitions, 11535 flow [2024-06-20 15:54:55,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 722 transitions, 11145 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:55,602 INFO L231 Difference]: Finished difference. Result has 445 places, 701 transitions, 9556 flow [2024-06-20 15:54:55,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9140, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9556, PETRI_PLACES=445, PETRI_TRANSITIONS=701} [2024-06-20 15:54:55,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-20 15:54:55,603 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 701 transitions, 9556 flow [2024-06-20 15:54:55,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:54:55,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:55,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:55,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 15:54:55,604 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)] === [2024-06-20 15:54:55,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:55,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1220242866, now seen corresponding path program 7 times [2024-06-20 15:54:55,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:55,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355282101] [2024-06-20 15:54:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:55,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:56,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:56,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355282101] [2024-06-20 15:54:56,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355282101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:56,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:56,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:56,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490841733] [2024-06-20 15:54:56,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:56,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:56,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:56,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:56,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:56,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:54:56,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 701 transitions, 9556 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:54:56,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:56,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:54:56,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:58,813 INFO L124 PetriNetUnfolderBase]: 4208/6762 cut-off events. [2024-06-20 15:54:58,813 INFO L125 PetriNetUnfolderBase]: For 2142957/2142961 co-relation queries the response was YES. [2024-06-20 15:54:58,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81850 conditions, 6762 events. 4208/6762 cut-off events. For 2142957/2142961 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 43006 event pairs, 744 based on Foata normal form. 2/6763 useless extension candidates. Maximal degree in co-relation 81638. Up to 5854 conditions per place. [2024-06-20 15:54:58,929 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 607 selfloop transitions, 114 changer transitions 0/726 dead transitions. [2024-06-20 15:54:58,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 726 transitions, 11563 flow [2024-06-20 15:54:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:58,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 15:54:58,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 15:54:58,930 INFO L175 Difference]: Start difference. First operand has 445 places, 701 transitions, 9556 flow. Second operand 9 states and 167 transitions. [2024-06-20 15:54:58,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 726 transitions, 11563 flow [2024-06-20 15:55:04,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 726 transitions, 11178 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-20 15:55:04,663 INFO L231 Difference]: Finished difference. Result has 447 places, 704 transitions, 9520 flow [2024-06-20 15:55:04,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9177, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9520, PETRI_PLACES=447, PETRI_TRANSITIONS=704} [2024-06-20 15:55:04,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-20 15:55:04,664 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 704 transitions, 9520 flow [2024-06-20 15:55:04,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:55:04,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:04,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:04,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 15:55:04,664 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)] === [2024-06-20 15:55:04,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:04,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1223690469, now seen corresponding path program 2 times [2024-06-20 15:55:04,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:04,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471726188] [2024-06-20 15:55:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:04,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:06,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:06,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471726188] [2024-06-20 15:55:06,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471726188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:06,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:06,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:06,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345472746] [2024-06-20 15:55:06,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:06,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:06,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:06,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:06,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:55:06,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 704 transitions, 9520 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 15:55:06,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:06,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:55:06,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:08,374 INFO L124 PetriNetUnfolderBase]: 4218/6774 cut-off events. [2024-06-20 15:55:08,374 INFO L125 PetriNetUnfolderBase]: For 2169708/2169712 co-relation queries the response was YES. [2024-06-20 15:55:08,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82037 conditions, 6774 events. 4218/6774 cut-off events. For 2169708/2169712 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 43064 event pairs, 722 based on Foata normal form. 4/6777 useless extension candidates. Maximal degree in co-relation 81824. Up to 6149 conditions per place. [2024-06-20 15:55:08,500 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 665 selfloop transitions, 57 changer transitions 0/727 dead transitions. [2024-06-20 15:55:08,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 727 transitions, 11187 flow [2024-06-20 15:55:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:08,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:08,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-20 15:55:08,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-20 15:55:08,501 INFO L175 Difference]: Start difference. First operand has 447 places, 704 transitions, 9520 flow. Second operand 10 states and 176 transitions. [2024-06-20 15:55:08,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 727 transitions, 11187 flow [2024-06-20 15:55:14,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 727 transitions, 10953 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 15:55:14,947 INFO L231 Difference]: Finished difference. Result has 451 places, 708 transitions, 9582 flow [2024-06-20 15:55:14,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9286, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9582, PETRI_PLACES=451, PETRI_TRANSITIONS=708} [2024-06-20 15:55:14,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-20 15:55:14,947 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 708 transitions, 9582 flow [2024-06-20 15:55:14,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 15:55:14,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:14,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:14,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 15:55:14,948 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)] === [2024-06-20 15:55:14,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:14,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1211653913, now seen corresponding path program 1 times [2024-06-20 15:55:14,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:14,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189479247] [2024-06-20 15:55:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:14,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:16,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:16,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189479247] [2024-06-20 15:55:16,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189479247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:16,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:16,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:16,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556522901] [2024-06-20 15:55:16,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:16,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:16,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:16,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:16,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:16,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 15:55:16,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 708 transitions, 9582 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:16,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:16,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 15:55:16,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:18,350 INFO L124 PetriNetUnfolderBase]: 4097/6619 cut-off events. [2024-06-20 15:55:18,351 INFO L125 PetriNetUnfolderBase]: For 2214020/2214044 co-relation queries the response was YES. [2024-06-20 15:55:18,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81065 conditions, 6619 events. 4097/6619 cut-off events. For 2214020/2214044 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 42546 event pairs, 712 based on Foata normal form. 16/6602 useless extension candidates. Maximal degree in co-relation 80851. Up to 5849 conditions per place. [2024-06-20 15:55:18,471 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 618 selfloop transitions, 22 changer transitions 0/731 dead transitions. [2024-06-20 15:55:18,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 731 transitions, 11111 flow [2024-06-20 15:55:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:55:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:55:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 15:55:18,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 15:55:18,472 INFO L175 Difference]: Start difference. First operand has 451 places, 708 transitions, 9582 flow. Second operand 9 states and 162 transitions. [2024-06-20 15:55:18,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 731 transitions, 11111 flow [2024-06-20 15:55:24,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 731 transitions, 10866 flow, removed 68 selfloop flow, removed 8 redundant places. [2024-06-20 15:55:24,693 INFO L231 Difference]: Finished difference. Result has 452 places, 710 transitions, 9552 flow [2024-06-20 15:55:24,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9337, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9552, PETRI_PLACES=452, PETRI_TRANSITIONS=710} [2024-06-20 15:55:24,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 409 predicate places. [2024-06-20 15:55:24,693 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 710 transitions, 9552 flow [2024-06-20 15:55:24,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:24,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:24,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:24,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 15:55:24,693 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)] === [2024-06-20 15:55:24,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:24,694 INFO L85 PathProgramCache]: Analyzing trace with hash -959997483, now seen corresponding path program 3 times [2024-06-20 15:55:24,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:24,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302932151] [2024-06-20 15:55:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:24,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:26,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:26,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302932151] [2024-06-20 15:55:26,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302932151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:26,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:26,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:26,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284348157] [2024-06-20 15:55:26,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:26,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:26,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:26,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:26,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:26,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:55:26,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 710 transitions, 9552 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 15:55:26,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:26,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:55:26,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:28,555 INFO L124 PetriNetUnfolderBase]: 4226/6784 cut-off events. [2024-06-20 15:55:28,555 INFO L125 PetriNetUnfolderBase]: For 2217756/2217760 co-relation queries the response was YES. [2024-06-20 15:55:28,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82138 conditions, 6784 events. 4226/6784 cut-off events. For 2217756/2217760 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 43119 event pairs, 720 based on Foata normal form. 4/6787 useless extension candidates. Maximal degree in co-relation 81923. Up to 6051 conditions per place. [2024-06-20 15:55:28,687 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 633 selfloop transitions, 96 changer transitions 0/734 dead transitions. [2024-06-20 15:55:28,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 734 transitions, 11468 flow [2024-06-20 15:55:28,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-20 15:55:28,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 15:55:28,688 INFO L175 Difference]: Start difference. First operand has 452 places, 710 transitions, 9552 flow. Second operand 10 states and 180 transitions. [2024-06-20 15:55:28,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 734 transitions, 11468 flow [2024-06-20 15:55:35,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 734 transitions, 11267 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-20 15:55:35,059 INFO L231 Difference]: Finished difference. Result has 455 places, 713 transitions, 9640 flow [2024-06-20 15:55:35,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9353, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9640, PETRI_PLACES=455, PETRI_TRANSITIONS=713} [2024-06-20 15:55:35,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-20 15:55:35,059 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 713 transitions, 9640 flow [2024-06-20 15:55:35,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 15:55:35,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:35,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:35,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 15:55:35,060 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)] === [2024-06-20 15:55:35,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:35,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1714933999, now seen corresponding path program 7 times [2024-06-20 15:55:35,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:35,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403813668] [2024-06-20 15:55:35,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:35,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:36,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:36,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403813668] [2024-06-20 15:55:36,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403813668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:36,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:36,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:55:36,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319267526] [2024-06-20 15:55:36,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:36,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:55:36,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:36,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:55:36,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:55:36,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:55:36,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 713 transitions, 9640 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:55:36,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:36,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:55:36,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:38,533 INFO L124 PetriNetUnfolderBase]: 4242/6808 cut-off events. [2024-06-20 15:55:38,534 INFO L125 PetriNetUnfolderBase]: For 2268863/2268867 co-relation queries the response was YES. [2024-06-20 15:55:38,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82761 conditions, 6808 events. 4242/6808 cut-off events. For 2268863/2268867 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 43234 event pairs, 744 based on Foata normal form. 6/6808 useless extension candidates. Maximal degree in co-relation 82545. Up to 6022 conditions per place. [2024-06-20 15:55:38,656 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 600 selfloop transitions, 125 changer transitions 0/730 dead transitions. [2024-06-20 15:55:38,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 730 transitions, 11310 flow [2024-06-20 15:55:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:55:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:55:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 15:55:38,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-20 15:55:38,657 INFO L175 Difference]: Start difference. First operand has 455 places, 713 transitions, 9640 flow. Second operand 9 states and 160 transitions. [2024-06-20 15:55:38,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 730 transitions, 11310 flow [2024-06-20 15:55:46,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 730 transitions, 10979 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-20 15:55:46,177 INFO L231 Difference]: Finished difference. Result has 456 places, 716 transitions, 9751 flow [2024-06-20 15:55:46,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9309, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9751, PETRI_PLACES=456, PETRI_TRANSITIONS=716} [2024-06-20 15:55:46,177 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-20 15:55:46,177 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 716 transitions, 9751 flow [2024-06-20 15:55:46,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:55:46,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:46,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:46,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 15:55:46,178 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)] === [2024-06-20 15:55:46,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:46,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1317220627, now seen corresponding path program 8 times [2024-06-20 15:55:46,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:46,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913337330] [2024-06-20 15:55:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:46,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:47,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:47,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913337330] [2024-06-20 15:55:47,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913337330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:47,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:47,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:55:47,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248758574] [2024-06-20 15:55:47,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:47,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:55:47,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:47,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:55:47,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:55:47,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:55:47,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 716 transitions, 9751 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:55:47,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:47,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:55:47,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:49,702 INFO L124 PetriNetUnfolderBase]: 4258/6832 cut-off events. [2024-06-20 15:55:49,702 INFO L125 PetriNetUnfolderBase]: For 2301343/2301347 co-relation queries the response was YES. [2024-06-20 15:55:49,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83513 conditions, 6832 events. 4258/6832 cut-off events. For 2301343/2301347 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 43429 event pairs, 748 based on Foata normal form. 6/6832 useless extension candidates. Maximal degree in co-relation 83296. Up to 6175 conditions per place. [2024-06-20 15:55:49,835 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 659 selfloop transitions, 69 changer transitions 0/733 dead transitions. [2024-06-20 15:55:49,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 733 transitions, 11433 flow [2024-06-20 15:55:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:55:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:55:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 15:55:49,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 15:55:49,836 INFO L175 Difference]: Start difference. First operand has 456 places, 716 transitions, 9751 flow. Second operand 9 states and 158 transitions. [2024-06-20 15:55:49,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 733 transitions, 11433 flow [2024-06-20 15:55:56,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 733 transitions, 11009 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-20 15:55:56,887 INFO L231 Difference]: Finished difference. Result has 458 places, 719 transitions, 9663 flow [2024-06-20 15:55:56,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9327, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9663, PETRI_PLACES=458, PETRI_TRANSITIONS=719} [2024-06-20 15:55:56,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-20 15:55:56,887 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 719 transitions, 9663 flow [2024-06-20 15:55:56,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:55:56,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:56,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:56,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 15:55:56,888 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)] === [2024-06-20 15:55:56,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:56,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1316864437, now seen corresponding path program 9 times [2024-06-20 15:55:56,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:56,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561403352] [2024-06-20 15:55:56,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:56,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:57,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:57,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561403352] [2024-06-20 15:55:57,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561403352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:57,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:57,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:55:57,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030389598] [2024-06-20 15:55:57,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:57,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:55:57,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:57,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:55:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:55:57,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:55:57,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 719 transitions, 9663 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:55:57,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:57,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:55:57,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:00,133 INFO L124 PetriNetUnfolderBase]: 4274/6856 cut-off events. [2024-06-20 15:56:00,133 INFO L125 PetriNetUnfolderBase]: For 2330190/2330194 co-relation queries the response was YES. [2024-06-20 15:56:00,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83834 conditions, 6856 events. 4274/6856 cut-off events. For 2330190/2330194 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 43591 event pairs, 742 based on Foata normal form. 6/6856 useless extension candidates. Maximal degree in co-relation 83616. Up to 6189 conditions per place. [2024-06-20 15:56:00,277 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 664 selfloop transitions, 68 changer transitions 0/737 dead transitions. [2024-06-20 15:56:00,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 737 transitions, 11361 flow [2024-06-20 15:56:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:56:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:56:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 15:56:00,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 15:56:00,278 INFO L175 Difference]: Start difference. First operand has 458 places, 719 transitions, 9663 flow. Second operand 9 states and 158 transitions. [2024-06-20 15:56:00,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 737 transitions, 11361 flow [2024-06-20 15:56:07,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 737 transitions, 11047 flow, removed 90 selfloop flow, removed 7 redundant places. [2024-06-20 15:56:07,049 INFO L231 Difference]: Finished difference. Result has 460 places, 722 transitions, 9689 flow [2024-06-20 15:56:07,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9349, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9689, PETRI_PLACES=460, PETRI_TRANSITIONS=722} [2024-06-20 15:56:07,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-20 15:56:07,049 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 722 transitions, 9689 flow [2024-06-20 15:56:07,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:56:07,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:07,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:07,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 15:56:07,050 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)] === [2024-06-20 15:56:07,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:07,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1328839117, now seen corresponding path program 10 times [2024-06-20 15:56:07,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:07,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779078005] [2024-06-20 15:56:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:07,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:08,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:08,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779078005] [2024-06-20 15:56:08,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779078005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:08,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:08,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:56:08,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584945169] [2024-06-20 15:56:08,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:08,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:56:08,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:56:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:56:08,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:56:08,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 722 transitions, 9689 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:56:08,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:08,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:56:08,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:10,082 INFO L124 PetriNetUnfolderBase]: 4277/6861 cut-off events. [2024-06-20 15:56:10,082 INFO L125 PetriNetUnfolderBase]: For 2330291/2330295 co-relation queries the response was YES. [2024-06-20 15:56:10,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83569 conditions, 6861 events. 4277/6861 cut-off events. For 2330291/2330295 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 43576 event pairs, 745 based on Foata normal form. 6/6861 useless extension candidates. Maximal degree in co-relation 83350. Up to 6169 conditions per place. [2024-06-20 15:56:10,232 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 651 selfloop transitions, 83 changer transitions 0/739 dead transitions. [2024-06-20 15:56:10,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 739 transitions, 11395 flow [2024-06-20 15:56:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:56:10,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:56:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 15:56:10,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 15:56:10,233 INFO L175 Difference]: Start difference. First operand has 460 places, 722 transitions, 9689 flow. Second operand 9 states and 159 transitions. [2024-06-20 15:56:10,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 739 transitions, 11395 flow [2024-06-20 15:56:16,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 739 transitions, 11077 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-20 15:56:16,888 INFO L231 Difference]: Finished difference. Result has 462 places, 725 transitions, 9747 flow [2024-06-20 15:56:16,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9371, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9747, PETRI_PLACES=462, PETRI_TRANSITIONS=725} [2024-06-20 15:56:16,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-20 15:56:16,888 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 725 transitions, 9747 flow [2024-06-20 15:56:16,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:56:16,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:16,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:16,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 15:56:16,889 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)] === [2024-06-20 15:56:16,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:16,889 INFO L85 PathProgramCache]: Analyzing trace with hash -104682039, now seen corresponding path program 2 times [2024-06-20 15:56:16,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:16,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910947330] [2024-06-20 15:56:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:16,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:17,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:17,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910947330] [2024-06-20 15:56:17,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910947330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:17,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:17,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:56:17,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994650813] [2024-06-20 15:56:17,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:17,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:56:17,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:17,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:56:17,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:56:17,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:56:17,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 725 transitions, 9747 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:56:17,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:17,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:56:17,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:19,851 INFO L124 PetriNetUnfolderBase]: 4282/6846 cut-off events. [2024-06-20 15:56:19,852 INFO L125 PetriNetUnfolderBase]: For 2316958/2316960 co-relation queries the response was YES. [2024-06-20 15:56:19,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83706 conditions, 6846 events. 4282/6846 cut-off events. For 2316958/2316960 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 43353 event pairs, 754 based on Foata normal form. 1/6841 useless extension candidates. Maximal degree in co-relation 83486. Up to 5962 conditions per place. [2024-06-20 15:56:19,982 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 624 selfloop transitions, 125 changer transitions 0/754 dead transitions. [2024-06-20 15:56:19,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 754 transitions, 11491 flow [2024-06-20 15:56:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:56:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:56:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 15:56:19,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 15:56:19,983 INFO L175 Difference]: Start difference. First operand has 462 places, 725 transitions, 9747 flow. Second operand 9 states and 170 transitions. [2024-06-20 15:56:19,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 754 transitions, 11491 flow [2024-06-20 15:56:27,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 754 transitions, 11137 flow, removed 96 selfloop flow, removed 7 redundant places. [2024-06-20 15:56:27,739 INFO L231 Difference]: Finished difference. Result has 464 places, 728 transitions, 9814 flow [2024-06-20 15:56:27,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9393, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9814, PETRI_PLACES=464, PETRI_TRANSITIONS=728} [2024-06-20 15:56:27,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-20 15:56:27,739 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 728 transitions, 9814 flow [2024-06-20 15:56:27,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:56:27,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:27,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:27,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 15:56:27,739 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)] === [2024-06-20 15:56:27,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:27,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1050577336, now seen corresponding path program 8 times [2024-06-20 15:56:27,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:27,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263370004] [2024-06-20 15:56:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:27,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:28,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:28,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263370004] [2024-06-20 15:56:28,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263370004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:28,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:28,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:56:28,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846482459] [2024-06-20 15:56:28,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:28,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:56:28,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:28,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:56:28,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:56:28,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:56:28,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 728 transitions, 9814 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:56:28,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:28,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:56:28,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:30,862 INFO L124 PetriNetUnfolderBase]: 4292/6880 cut-off events. [2024-06-20 15:56:30,862 INFO L125 PetriNetUnfolderBase]: For 2354529/2354531 co-relation queries the response was YES. [2024-06-20 15:56:30,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84277 conditions, 6880 events. 4292/6880 cut-off events. For 2354529/2354531 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 43712 event pairs, 721 based on Foata normal form. 2/6876 useless extension candidates. Maximal degree in co-relation 84056. Up to 6174 conditions per place. [2024-06-20 15:56:30,992 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 686 selfloop transitions, 73 changer transitions 0/764 dead transitions. [2024-06-20 15:56:30,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 764 transitions, 11582 flow [2024-06-20 15:56:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:56:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:56:30,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-20 15:56:30,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 15:56:30,993 INFO L175 Difference]: Start difference. First operand has 464 places, 728 transitions, 9814 flow. Second operand 10 states and 185 transitions. [2024-06-20 15:56:30,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 764 transitions, 11582 flow [2024-06-20 15:56:37,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 764 transitions, 11185 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-20 15:56:38,004 INFO L231 Difference]: Finished difference. Result has 467 places, 731 transitions, 9682 flow [2024-06-20 15:56:38,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9417, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9682, PETRI_PLACES=467, PETRI_TRANSITIONS=731} [2024-06-20 15:56:38,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-20 15:56:38,004 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 731 transitions, 9682 flow [2024-06-20 15:56:38,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:56:38,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:38,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:38,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 15:56:38,005 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)] === [2024-06-20 15:56:38,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:38,005 INFO L85 PathProgramCache]: Analyzing trace with hash 506795817, now seen corresponding path program 7 times [2024-06-20 15:56:38,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:38,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452225657] [2024-06-20 15:56:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:38,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:38,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:38,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452225657] [2024-06-20 15:56:38,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452225657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:38,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:38,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:56:38,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102421603] [2024-06-20 15:56:38,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:38,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:56:38,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:38,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:56:38,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:56:38,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:56:38,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 731 transitions, 9682 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:56:38,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:38,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:56:38,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:41,146 INFO L124 PetriNetUnfolderBase]: 4302/6892 cut-off events. [2024-06-20 15:56:41,146 INFO L125 PetriNetUnfolderBase]: For 2383863/2383865 co-relation queries the response was YES. [2024-06-20 15:56:41,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84465 conditions, 6892 events. 4302/6892 cut-off events. For 2383863/2383865 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 43839 event pairs, 736 based on Foata normal form. 2/6888 useless extension candidates. Maximal degree in co-relation 84243. Up to 6182 conditions per place. [2024-06-20 15:56:41,285 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 678 selfloop transitions, 77 changer transitions 0/760 dead transitions. [2024-06-20 15:56:41,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 760 transitions, 11479 flow [2024-06-20 15:56:41,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:56:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:56:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 15:56:41,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 15:56:41,286 INFO L175 Difference]: Start difference. First operand has 467 places, 731 transitions, 9682 flow. Second operand 9 states and 166 transitions. [2024-06-20 15:56:41,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 760 transitions, 11479 flow [2024-06-20 15:56:49,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 760 transitions, 11198 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-20 15:56:49,228 INFO L231 Difference]: Finished difference. Result has 466 places, 735 transitions, 9743 flow [2024-06-20 15:56:49,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9401, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9743, PETRI_PLACES=466, PETRI_TRANSITIONS=735} [2024-06-20 15:56:49,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-20 15:56:49,228 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 735 transitions, 9743 flow [2024-06-20 15:56:49,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:56:49,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:49,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:49,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 15:56:49,229 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)] === [2024-06-20 15:56:49,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:49,229 INFO L85 PathProgramCache]: Analyzing trace with hash -378830945, now seen corresponding path program 3 times [2024-06-20 15:56:49,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:49,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766996710] [2024-06-20 15:56:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:49,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:50,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:50,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766996710] [2024-06-20 15:56:50,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766996710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:50,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:50,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:56:50,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843888840] [2024-06-20 15:56:50,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:50,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:56:50,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:50,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:56:50,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:56:50,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:56:50,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 735 transitions, 9743 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:56:50,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:50,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:56:50,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:52,845 INFO L124 PetriNetUnfolderBase]: 4307/6884 cut-off events. [2024-06-20 15:56:52,845 INFO L125 PetriNetUnfolderBase]: For 2401128/2401130 co-relation queries the response was YES. [2024-06-20 15:56:52,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84744 conditions, 6884 events. 4307/6884 cut-off events. For 2401128/2401130 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 43673 event pairs, 768 based on Foata normal form. 1/6879 useless extension candidates. Maximal degree in co-relation 84521. Up to 5997 conditions per place. [2024-06-20 15:56:52,993 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 635 selfloop transitions, 123 changer transitions 0/763 dead transitions. [2024-06-20 15:56:52,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 763 transitions, 11509 flow [2024-06-20 15:56:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:56:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:56:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 15:56:52,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 15:56:52,994 INFO L175 Difference]: Start difference. First operand has 466 places, 735 transitions, 9743 flow. Second operand 9 states and 170 transitions. [2024-06-20 15:56:52,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 763 transitions, 11509 flow [2024-06-20 15:57:00,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 763 transitions, 11204 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-20 15:57:00,918 INFO L231 Difference]: Finished difference. Result has 468 places, 738 transitions, 9863 flow [2024-06-20 15:57:00,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9438, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9863, PETRI_PLACES=468, PETRI_TRANSITIONS=738} [2024-06-20 15:57:00,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-20 15:57:00,919 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 738 transitions, 9863 flow [2024-06-20 15:57:00,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:57:00,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:00,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:00,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 15:57:00,919 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)] === [2024-06-20 15:57:00,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:00,919 INFO L85 PathProgramCache]: Analyzing trace with hash -111018610, now seen corresponding path program 9 times [2024-06-20 15:57:00,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:00,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154991617] [2024-06-20 15:57:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:00,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:01,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:01,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154991617] [2024-06-20 15:57:01,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154991617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:01,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:01,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:57:01,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887162235] [2024-06-20 15:57:01,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:01,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:57:01,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:01,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:57:01,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:57:01,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:57:01,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 738 transitions, 9863 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:57:01,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:01,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:57:01,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:03,875 INFO L124 PetriNetUnfolderBase]: 4301/6886 cut-off events. [2024-06-20 15:57:03,875 INFO L125 PetriNetUnfolderBase]: For 2418152/2418154 co-relation queries the response was YES. [2024-06-20 15:57:03,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84727 conditions, 6886 events. 4301/6886 cut-off events. For 2418152/2418154 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 43728 event pairs, 734 based on Foata normal form. 2/6882 useless extension candidates. Maximal degree in co-relation 84503. Up to 6187 conditions per place. [2024-06-20 15:57:04,010 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 689 selfloop transitions, 71 changer transitions 0/765 dead transitions. [2024-06-20 15:57:04,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 765 transitions, 11505 flow [2024-06-20 15:57:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:57:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:57:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 15:57:04,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 15:57:04,012 INFO L175 Difference]: Start difference. First operand has 468 places, 738 transitions, 9863 flow. Second operand 9 states and 168 transitions. [2024-06-20 15:57:04,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 765 transitions, 11505 flow [2024-06-20 15:57:11,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 765 transitions, 11050 flow, removed 107 selfloop flow, removed 7 redundant places. [2024-06-20 15:57:11,547 INFO L231 Difference]: Finished difference. Result has 470 places, 738 transitions, 9557 flow [2024-06-20 15:57:11,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9408, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9557, PETRI_PLACES=470, PETRI_TRANSITIONS=738} [2024-06-20 15:57:11,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-20 15:57:11,548 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 738 transitions, 9557 flow [2024-06-20 15:57:11,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:57:11,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:11,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:11,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 15:57:11,548 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)] === [2024-06-20 15:57:11,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:11,549 INFO L85 PathProgramCache]: Analyzing trace with hash -789957058, now seen corresponding path program 10 times [2024-06-20 15:57:11,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:11,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484468512] [2024-06-20 15:57:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:11,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:12,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:12,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484468512] [2024-06-20 15:57:12,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484468512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:12,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:12,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:57:12,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431773390] [2024-06-20 15:57:12,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:12,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:57:12,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:12,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:57:12,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:57:12,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:57:12,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 738 transitions, 9557 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:57:12,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:12,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:57:12,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:14,574 INFO L124 PetriNetUnfolderBase]: 4311/6911 cut-off events. [2024-06-20 15:57:14,574 INFO L125 PetriNetUnfolderBase]: For 2444483/2444485 co-relation queries the response was YES. [2024-06-20 15:57:14,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84739 conditions, 6911 events. 4311/6911 cut-off events. For 2444483/2444485 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 43971 event pairs, 720 based on Foata normal form. 2/6907 useless extension candidates. Maximal degree in co-relation 84514. Up to 6185 conditions per place. [2024-06-20 15:57:14,704 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 692 selfloop transitions, 79 changer transitions 0/776 dead transitions. [2024-06-20 15:57:14,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 776 transitions, 11389 flow [2024-06-20 15:57:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:57:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:57:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-20 15:57:14,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-20 15:57:14,705 INFO L175 Difference]: Start difference. First operand has 470 places, 738 transitions, 9557 flow. Second operand 11 states and 201 transitions. [2024-06-20 15:57:14,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 776 transitions, 11389 flow [2024-06-20 15:57:22,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 776 transitions, 11198 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 15:57:22,854 INFO L231 Difference]: Finished difference. Result has 473 places, 741 transitions, 9648 flow [2024-06-20 15:57:22,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9366, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9648, PETRI_PLACES=473, PETRI_TRANSITIONS=741} [2024-06-20 15:57:22,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-20 15:57:22,854 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 741 transitions, 9648 flow [2024-06-20 15:57:22,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:57:22,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:22,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:22,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 15:57:22,855 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)] === [2024-06-20 15:57:22,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:22,855 INFO L85 PathProgramCache]: Analyzing trace with hash -378826109, now seen corresponding path program 8 times [2024-06-20 15:57:22,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:22,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435615508] [2024-06-20 15:57:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:22,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:23,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:23,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435615508] [2024-06-20 15:57:23,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435615508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:23,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:23,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:57:23,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833309372] [2024-06-20 15:57:23,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:23,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:57:23,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:23,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:57:23,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:57:23,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:57:23,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 741 transitions, 9648 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:57:23,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:23,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:57:23,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:25,995 INFO L124 PetriNetUnfolderBase]: 4321/6924 cut-off events. [2024-06-20 15:57:25,996 INFO L125 PetriNetUnfolderBase]: For 2474897/2474899 co-relation queries the response was YES. [2024-06-20 15:57:26,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85231 conditions, 6924 events. 4321/6924 cut-off events. For 2474897/2474899 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 44066 event pairs, 741 based on Foata normal form. 2/6920 useless extension candidates. Maximal degree in co-relation 85005. Up to 6209 conditions per place. [2024-06-20 15:57:26,133 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 689 selfloop transitions, 75 changer transitions 0/769 dead transitions. [2024-06-20 15:57:26,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 769 transitions, 11469 flow [2024-06-20 15:57:26,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:57:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:57:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 15:57:26,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 15:57:26,149 INFO L175 Difference]: Start difference. First operand has 473 places, 741 transitions, 9648 flow. Second operand 9 states and 166 transitions. [2024-06-20 15:57:26,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 769 transitions, 11469 flow [2024-06-20 15:57:35,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 769 transitions, 11233 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-20 15:57:35,218 INFO L231 Difference]: Finished difference. Result has 473 places, 745 transitions, 9760 flow [2024-06-20 15:57:35,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9412, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9760, PETRI_PLACES=473, PETRI_TRANSITIONS=745} [2024-06-20 15:57:35,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-20 15:57:35,218 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 745 transitions, 9760 flow [2024-06-20 15:57:35,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:57:35,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:35,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:35,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 15:57:35,219 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)] === [2024-06-20 15:57:35,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:35,219 INFO L85 PathProgramCache]: Analyzing trace with hash -378826512, now seen corresponding path program 11 times [2024-06-20 15:57:35,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:35,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366305363] [2024-06-20 15:57:35,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:35,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:36,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:36,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366305363] [2024-06-20 15:57:36,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366305363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:36,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:36,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:57:36,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764760795] [2024-06-20 15:57:36,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:36,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:57:36,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:36,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:57:36,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:57:36,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:57:36,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 745 transitions, 9760 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:57:36,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:36,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:57:36,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:38,612 INFO L124 PetriNetUnfolderBase]: 4331/6946 cut-off events. [2024-06-20 15:57:38,613 INFO L125 PetriNetUnfolderBase]: For 2506911/2506913 co-relation queries the response was YES. [2024-06-20 15:57:38,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85607 conditions, 6946 events. 4331/6946 cut-off events. For 2506911/2506913 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 44350 event pairs, 741 based on Foata normal form. 2/6942 useless extension candidates. Maximal degree in co-relation 85380. Up to 6213 conditions per place. [2024-06-20 15:57:38,797 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 695 selfloop transitions, 77 changer transitions 0/777 dead transitions. [2024-06-20 15:57:38,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 777 transitions, 11578 flow [2024-06-20 15:57:38,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:57:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:57:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-20 15:57:38,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-20 15:57:38,798 INFO L175 Difference]: Start difference. First operand has 473 places, 745 transitions, 9760 flow. Second operand 10 states and 184 transitions. [2024-06-20 15:57:38,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 777 transitions, 11578 flow [2024-06-20 15:57:46,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 777 transitions, 11267 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-20 15:57:46,838 INFO L231 Difference]: Finished difference. Result has 476 places, 748 transitions, 9733 flow [2024-06-20 15:57:46,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9449, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9733, PETRI_PLACES=476, PETRI_TRANSITIONS=748} [2024-06-20 15:57:46,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-20 15:57:46,839 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 748 transitions, 9733 flow [2024-06-20 15:57:46,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:57:46,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:46,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:46,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 15:57:46,839 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)] === [2024-06-20 15:57:46,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:46,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1647444697, now seen corresponding path program 4 times [2024-06-20 15:57:46,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:46,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862206384] [2024-06-20 15:57:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:46,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:47,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:47,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862206384] [2024-06-20 15:57:47,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862206384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:47,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:47,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:57:47,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332452510] [2024-06-20 15:57:47,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:47,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:57:47,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:47,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:57:47,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:57:47,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:57:47,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 748 transitions, 9733 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:57:47,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:47,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:57:47,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:49,902 INFO L124 PetriNetUnfolderBase]: 4336/6928 cut-off events. [2024-06-20 15:57:49,902 INFO L125 PetriNetUnfolderBase]: For 2520651/2520653 co-relation queries the response was YES. [2024-06-20 15:57:50,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85705 conditions, 6928 events. 4336/6928 cut-off events. For 2520651/2520653 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 43972 event pairs, 754 based on Foata normal form. 1/6923 useless extension candidates. Maximal degree in co-relation 85477. Up to 6038 conditions per place. [2024-06-20 15:57:50,042 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 646 selfloop transitions, 127 changer transitions 0/778 dead transitions. [2024-06-20 15:57:50,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 778 transitions, 11545 flow [2024-06-20 15:57:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:57:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:57:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 15:57:50,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 15:57:50,043 INFO L175 Difference]: Start difference. First operand has 476 places, 748 transitions, 9733 flow. Second operand 9 states and 170 transitions. [2024-06-20 15:57:50,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 778 transitions, 11545 flow [2024-06-20 15:57:59,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 778 transitions, 11307 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-20 15:57:59,013 INFO L231 Difference]: Finished difference. Result has 477 places, 751 transitions, 9936 flow [2024-06-20 15:57:59,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9495, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9936, PETRI_PLACES=477, PETRI_TRANSITIONS=751} [2024-06-20 15:57:59,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-20 15:57:59,014 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 751 transitions, 9936 flow [2024-06-20 15:57:59,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:57:59,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:59,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:59,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 15:57:59,015 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)] === [2024-06-20 15:57:59,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:59,015 INFO L85 PathProgramCache]: Analyzing trace with hash -979247677, now seen corresponding path program 5 times [2024-06-20 15:57:59,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:59,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280069092] [2024-06-20 15:57:59,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:59,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:59,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:59,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280069092] [2024-06-20 15:57:59,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280069092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:59,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:59,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:57:59,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100912084] [2024-06-20 15:57:59,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:59,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:57:59,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:57:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:00,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:58:00,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 751 transitions, 9936 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:58:00,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:00,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:58:00,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:02,400 INFO L124 PetriNetUnfolderBase]: 4331/6951 cut-off events. [2024-06-20 15:58:02,400 INFO L125 PetriNetUnfolderBase]: For 2539053/2539055 co-relation queries the response was YES. [2024-06-20 15:58:02,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86071 conditions, 6951 events. 4331/6951 cut-off events. For 2539053/2539055 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 44362 event pairs, 737 based on Foata normal form. 1/6946 useless extension candidates. Maximal degree in co-relation 85842. Up to 6373 conditions per place. [2024-06-20 15:58:02,529 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 726 selfloop transitions, 41 changer transitions 0/772 dead transitions. [2024-06-20 15:58:02,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 772 transitions, 11561 flow [2024-06-20 15:58:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 15:58:02,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 15:58:02,530 INFO L175 Difference]: Start difference. First operand has 477 places, 751 transitions, 9936 flow. Second operand 9 states and 158 transitions. [2024-06-20 15:58:02,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 772 transitions, 11561 flow [2024-06-20 15:58:11,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 772 transitions, 11078 flow, removed 117 selfloop flow, removed 7 redundant places. [2024-06-20 15:58:11,699 INFO L231 Difference]: Finished difference. Result has 479 places, 752 transitions, 9568 flow [2024-06-20 15:58:11,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9461, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9568, PETRI_PLACES=479, PETRI_TRANSITIONS=752} [2024-06-20 15:58:11,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-20 15:58:11,700 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 752 transitions, 9568 flow [2024-06-20 15:58:11,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:58:11,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:11,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:11,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 15:58:11,700 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)] === [2024-06-20 15:58:11,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:11,701 INFO L85 PathProgramCache]: Analyzing trace with hash -374177969, now seen corresponding path program 9 times [2024-06-20 15:58:11,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:11,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707697226] [2024-06-20 15:58:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:11,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:12,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:12,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707697226] [2024-06-20 15:58:12,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707697226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:12,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:12,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:12,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668692631] [2024-06-20 15:58:12,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:12,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:12,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:12,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:12,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:12,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:58:12,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 752 transitions, 9568 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:58:12,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:12,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:58:12,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:14,808 INFO L124 PetriNetUnfolderBase]: 4336/6949 cut-off events. [2024-06-20 15:58:14,809 INFO L125 PetriNetUnfolderBase]: For 2563619/2563621 co-relation queries the response was YES. [2024-06-20 15:58:14,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85761 conditions, 6949 events. 4336/6949 cut-off events. For 2563619/2563621 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 44342 event pairs, 742 based on Foata normal form. 1/6944 useless extension candidates. Maximal degree in co-relation 85531. Up to 6191 conditions per place. [2024-06-20 15:58:14,949 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 680 selfloop transitions, 96 changer transitions 0/781 dead transitions. [2024-06-20 15:58:14,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 781 transitions, 11895 flow [2024-06-20 15:58:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 15:58:14,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 15:58:14,950 INFO L175 Difference]: Start difference. First operand has 479 places, 752 transitions, 9568 flow. Second operand 9 states and 166 transitions. [2024-06-20 15:58:14,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 781 transitions, 11895 flow [2024-06-20 15:58:24,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 781 transitions, 11775 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 15:58:24,176 INFO L231 Difference]: Finished difference. Result has 482 places, 759 transitions, 10014 flow [2024-06-20 15:58:24,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9448, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10014, PETRI_PLACES=482, PETRI_TRANSITIONS=759} [2024-06-20 15:58:24,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-20 15:58:24,176 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 759 transitions, 10014 flow [2024-06-20 15:58:24,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:58:24,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:24,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:24,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 15:58:24,176 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)] === [2024-06-20 15:58:24,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1896437317, now seen corresponding path program 5 times [2024-06-20 15:58:24,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:24,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983668382] [2024-06-20 15:58:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:24,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:25,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:25,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983668382] [2024-06-20 15:58:25,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983668382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:25,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:25,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:25,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364143680] [2024-06-20 15:58:25,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:25,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:25,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:25,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:25,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:25,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:58:25,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 759 transitions, 10014 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:58:25,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:25,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:58:25,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:27,213 INFO L124 PetriNetUnfolderBase]: 4333/6923 cut-off events. [2024-06-20 15:58:27,213 INFO L125 PetriNetUnfolderBase]: For 2581975/2581977 co-relation queries the response was YES. [2024-06-20 15:58:27,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85978 conditions, 6923 events. 4333/6923 cut-off events. For 2581975/2581977 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 43940 event pairs, 754 based on Foata normal form. 1/6918 useless extension candidates. Maximal degree in co-relation 85746. Up to 6004 conditions per place. [2024-06-20 15:58:27,349 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 639 selfloop transitions, 142 changer transitions 0/786 dead transitions. [2024-06-20 15:58:27,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 786 transitions, 11838 flow [2024-06-20 15:58:27,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 15:58:27,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 15:58:27,350 INFO L175 Difference]: Start difference. First operand has 482 places, 759 transitions, 10014 flow. Second operand 9 states and 169 transitions. [2024-06-20 15:58:27,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 786 transitions, 11838 flow [2024-06-20 15:58:36,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 786 transitions, 11581 flow, removed 79 selfloop flow, removed 5 redundant places. [2024-06-20 15:58:36,693 INFO L231 Difference]: Finished difference. Result has 486 places, 762 transitions, 10235 flow [2024-06-20 15:58:36,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9757, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10235, PETRI_PLACES=486, PETRI_TRANSITIONS=762} [2024-06-20 15:58:36,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-20 15:58:36,694 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 762 transitions, 10235 flow [2024-06-20 15:58:36,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:58:36,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:36,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:36,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 15:58:36,695 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)] === [2024-06-20 15:58:36,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:36,695 INFO L85 PathProgramCache]: Analyzing trace with hash 891026247, now seen corresponding path program 10 times [2024-06-20 15:58:36,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:36,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949345633] [2024-06-20 15:58:36,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:36,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:37,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:37,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949345633] [2024-06-20 15:58:37,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949345633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:37,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:37,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:37,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763837307] [2024-06-20 15:58:37,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:37,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:37,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:37,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:37,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:37,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:58:37,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 762 transitions, 10235 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:58:37,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:37,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:58:37,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:40,004 INFO L124 PetriNetUnfolderBase]: 4359/6969 cut-off events. [2024-06-20 15:58:40,005 INFO L125 PetriNetUnfolderBase]: For 2663586/2663588 co-relation queries the response was YES. [2024-06-20 15:58:40,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88013 conditions, 6969 events. 4359/6969 cut-off events. For 2663586/2663588 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 44317 event pairs, 723 based on Foata normal form. 2/6965 useless extension candidates. Maximal degree in co-relation 87779. Up to 6182 conditions per place. [2024-06-20 15:58:40,160 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 683 selfloop transitions, 108 changer transitions 0/796 dead transitions. [2024-06-20 15:58:40,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 796 transitions, 12702 flow [2024-06-20 15:58:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 15:58:40,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 15:58:40,161 INFO L175 Difference]: Start difference. First operand has 486 places, 762 transitions, 10235 flow. Second operand 9 states and 169 transitions. [2024-06-20 15:58:40,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 796 transitions, 12702 flow [2024-06-20 15:58:48,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 796 transitions, 12242 flow, removed 90 selfloop flow, removed 7 redundant places. [2024-06-20 15:58:48,616 INFO L231 Difference]: Finished difference. Result has 489 places, 773 transitions, 10482 flow [2024-06-20 15:58:48,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9775, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10482, PETRI_PLACES=489, PETRI_TRANSITIONS=773} [2024-06-20 15:58:48,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-20 15:58:48,616 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 773 transitions, 10482 flow [2024-06-20 15:58:48,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:58:48,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:48,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:48,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 15:58:48,617 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)] === [2024-06-20 15:58:48,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:48,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1520040091, now seen corresponding path program 11 times [2024-06-20 15:58:48,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:48,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886370872] [2024-06-20 15:58:48,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:48,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:49,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:49,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886370872] [2024-06-20 15:58:49,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886370872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:49,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:49,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:49,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167534579] [2024-06-20 15:58:49,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:49,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:49,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:49,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:49,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:49,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:58:49,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 773 transitions, 10482 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:58:49,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:49,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:58:49,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:51,861 INFO L124 PetriNetUnfolderBase]: 4353/6973 cut-off events. [2024-06-20 15:58:51,861 INFO L125 PetriNetUnfolderBase]: For 2675068/2675070 co-relation queries the response was YES. [2024-06-20 15:58:51,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88301 conditions, 6973 events. 4353/6973 cut-off events. For 2675068/2675070 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 44516 event pairs, 726 based on Foata normal form. 2/6969 useless extension candidates. Maximal degree in co-relation 88065. Up to 6212 conditions per place. [2024-06-20 15:58:52,004 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 703 selfloop transitions, 89 changer transitions 0/797 dead transitions. [2024-06-20 15:58:52,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 797 transitions, 12249 flow [2024-06-20 15:58:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:52,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 15:58:52,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 15:58:52,005 INFO L175 Difference]: Start difference. First operand has 489 places, 773 transitions, 10482 flow. Second operand 9 states and 166 transitions. [2024-06-20 15:58:52,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 797 transitions, 12249 flow [2024-06-20 15:59:01,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 797 transitions, 11738 flow, removed 201 selfloop flow, removed 5 redundant places. [2024-06-20 15:59:01,693 INFO L231 Difference]: Finished difference. Result has 493 places, 774 transitions, 10199 flow [2024-06-20 15:59:01,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10003, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10199, PETRI_PLACES=493, PETRI_TRANSITIONS=774} [2024-06-20 15:59:01,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-20 15:59:01,694 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 774 transitions, 10199 flow [2024-06-20 15:59:01,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:59:01,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:01,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:01,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 15:59:01,694 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)] === [2024-06-20 15:59:01,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:01,695 INFO L85 PathProgramCache]: Analyzing trace with hash -815533648, now seen corresponding path program 12 times [2024-06-20 15:59:01,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:01,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888736906] [2024-06-20 15:59:01,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:01,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:02,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:02,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888736906] [2024-06-20 15:59:02,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888736906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:02,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:02,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:59:02,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84480154] [2024-06-20 15:59:02,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:02,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:59:02,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:02,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:59:02,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:59:02,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:59:02,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 774 transitions, 10199 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:59:02,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:02,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:59:02,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:04,787 INFO L124 PetriNetUnfolderBase]: 4363/7001 cut-off events. [2024-06-20 15:59:04,788 INFO L125 PetriNetUnfolderBase]: For 2700186/2700188 co-relation queries the response was YES. [2024-06-20 15:59:04,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88339 conditions, 7001 events. 4363/7001 cut-off events. For 2700186/2700188 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 44727 event pairs, 722 based on Foata normal form. 2/6997 useless extension candidates. Maximal degree in co-relation 88101. Up to 6176 conditions per place. [2024-06-20 15:59:04,929 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 698 selfloop transitions, 103 changer transitions 0/806 dead transitions. [2024-06-20 15:59:04,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 806 transitions, 12090 flow [2024-06-20 15:59:04,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-20 15:59:04,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-20 15:59:04,930 INFO L175 Difference]: Start difference. First operand has 493 places, 774 transitions, 10199 flow. Second operand 10 states and 183 transitions. [2024-06-20 15:59:04,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 806 transitions, 12090 flow [2024-06-20 15:59:12,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 806 transitions, 11887 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:59:12,818 INFO L231 Difference]: Finished difference. Result has 496 places, 777 transitions, 10307 flow [2024-06-20 15:59:12,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9996, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10307, PETRI_PLACES=496, PETRI_TRANSITIONS=777} [2024-06-20 15:59:12,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-20 15:59:12,819 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 777 transitions, 10307 flow [2024-06-20 15:59:12,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:59:12,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:12,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:12,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 15:59:12,819 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)] === [2024-06-20 15:59:12,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash -374184479, now seen corresponding path program 12 times [2024-06-20 15:59:12,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:12,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898570691] [2024-06-20 15:59:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:12,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:13,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:13,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898570691] [2024-06-20 15:59:13,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898570691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:13,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:13,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:59:13,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558141928] [2024-06-20 15:59:13,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:13,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:59:13,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:13,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:59:13,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:59:13,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:59:13,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 777 transitions, 10307 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:59:13,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:13,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:59:13,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:15,951 INFO L124 PetriNetUnfolderBase]: 4357/6983 cut-off events. [2024-06-20 15:59:15,952 INFO L125 PetriNetUnfolderBase]: For 2698962/2698964 co-relation queries the response was YES. [2024-06-20 15:59:16,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88033 conditions, 6983 events. 4357/6983 cut-off events. For 2698962/2698964 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 44597 event pairs, 739 based on Foata normal form. 2/6979 useless extension candidates. Maximal degree in co-relation 87794. Up to 6241 conditions per place. [2024-06-20 15:59:16,092 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 711 selfloop transitions, 83 changer transitions 0/799 dead transitions. [2024-06-20 15:59:16,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 799 transitions, 12033 flow [2024-06-20 15:59:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:59:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:59:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 15:59:16,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 15:59:16,094 INFO L175 Difference]: Start difference. First operand has 496 places, 777 transitions, 10307 flow. Second operand 9 states and 165 transitions. [2024-06-20 15:59:16,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 799 transitions, 12033 flow [2024-06-20 15:59:24,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 799 transitions, 11627 flow, removed 102 selfloop flow, removed 8 redundant places. [2024-06-20 15:59:24,605 INFO L231 Difference]: Finished difference. Result has 497 places, 777 transitions, 10074 flow [2024-06-20 15:59:24,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9901, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10074, PETRI_PLACES=497, PETRI_TRANSITIONS=777} [2024-06-20 15:59:24,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-20 15:59:24,606 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 777 transitions, 10074 flow [2024-06-20 15:59:24,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:59:24,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:24,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:24,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 15:59:24,606 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)] === [2024-06-20 15:59:24,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:24,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2036435986, now seen corresponding path program 13 times [2024-06-20 15:59:24,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:24,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933099302] [2024-06-20 15:59:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:24,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:25,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:25,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933099302] [2024-06-20 15:59:25,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933099302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:25,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:25,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:59:25,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176191366] [2024-06-20 15:59:25,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:25,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:59:25,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:25,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:59:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:59:25,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 15:59:25,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 777 transitions, 10074 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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) [2024-06-20 15:59:25,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:25,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 15:59:25,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:27,708 INFO L124 PetriNetUnfolderBase]: 4351/6975 cut-off events. [2024-06-20 15:59:27,708 INFO L125 PetriNetUnfolderBase]: For 2695269/2695271 co-relation queries the response was YES. [2024-06-20 15:59:27,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87312 conditions, 6975 events. 4351/6975 cut-off events. For 2695269/2695271 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 44521 event pairs, 738 based on Foata normal form. 2/6971 useless extension candidates. Maximal degree in co-relation 87072. Up to 6231 conditions per place. [2024-06-20 15:59:27,847 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 713 selfloop transitions, 82 changer transitions 0/800 dead transitions. [2024-06-20 15:59:27,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 800 transitions, 11838 flow [2024-06-20 15:59:27,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:59:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:59:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 15:59:27,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 15:59:27,861 INFO L175 Difference]: Start difference. First operand has 497 places, 777 transitions, 10074 flow. Second operand 9 states and 165 transitions. [2024-06-20 15:59:27,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 800 transitions, 11838 flow Killed by 15